{"id":3421,"date":"2025-03-24T08:46:15","date_gmt":"2025-03-23T23:46:15","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3421"},"modified":"2025-03-24T08:46:44","modified_gmt":"2025-03-23T23:46:44","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91php%e9%85%8d%e5%88%97%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e8%ac%9b%e5%ba%a7%ef%bc%9a%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%bf%9c","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3421","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011PHP\u914d\u5217\u30de\u30b9\u30bf\u30fc\u8b1b\u5ea7\uff1a\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u4f7f\u3044\u3053\u306a\u305920\u306e\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\u306f\u3058\u3081\u306b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u91cd\u8981\u6027<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u5bfe\u8c61\u8aad\u8005<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">PHP\u306e\u914d\u5217\u3068\u306f<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u4ed6\u8a00\u8a9e\u3068\u6bd4\u8f03\u3057\u305fPHP\u914d\u5217\u306e\u7279\u5fb4<\/a>      <\/li>      <li>        <a href=\"#i-6\">PHP\u306e\u914d\u5217\u304c\u5b9f\u969b\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u3067\u3042\u308b\u7406\u7531<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u914d\u5217\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">PHP\u914d\u5217\u306e\u57fa\u672c<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u914d\u5217\u306e\u4f5c\u6210\u65b9\u6cd5\uff08array()\u95a2\u6570\u3068[]\u8a18\u6cd5\u306e\u9055\u3044\uff09<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u914d\u5217\u306e\u8ffd\u52a0\u30fb\u5909\u66f4\u30fb\u524a\u9664\u306e\u57fa\u672c\u64cd\u4f5c<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">\u914d\u5217\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u7279\u5fb4\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-28\">\u9023\u60f3\u914d\u5217\uff08\u30ad\u30fc\u30fb\u30d0\u30ea\u30e5\u30fc\u914d\u5217\uff09\u306e\u7279\u5fb4\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-31\">\u591a\u6b21\u5143\u914d\u5217\u306e\u69cb\u9020\u3068\u7406\u89e3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-34\">\u914d\u5217\u306e\u7a2e\u985e\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-36\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af1\uff1a\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-37\">array_push()\u3068array_pop()\u306e\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-40\">array_shift()\u3068array_unshift()\u306b\u3088\u308b\u30ad\u30e5\u30fc\u64cd\u4f5c<\/a>      <\/li>      <li>        <a href=\"#i-43\">\u7279\u5b9a\u306e\u4f4d\u7f6e\u3078\u306e\u8981\u7d20\u306e\u633f\u5165\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-49\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-50\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af2\uff1a\u914d\u5217\u306e\u7d50\u5408\u3068\u5206\u5272<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-51\">array_merge()\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u7d50\u5408<\/a>      <\/li>      <li>        <a href=\"#i-58\">array_combine()\u306b\u3088\u308b\u30ad\u30fc\u3068\u5024\u306e\u914d\u5217\u7d50\u5408<\/a>      <\/li>      <li>        <a href=\"#i-62\">array_slice()\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u90e8\u5206\u53d6\u5f97<\/a>      <\/li>      <li>        <a href=\"#i-66\">array_chunk()\u306b\u3088\u308b\u914d\u5217\u306e\u5206\u5272<\/a>      <\/li>      <li>        <a href=\"#i-70\">\u914d\u5217\u7d50\u5408\u3068\u5206\u5272\u306b\u95a2\u3059\u308b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-74\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4f7f\u7528\u4e0a\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-75\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af3\uff1a\u691c\u7d22\u3068\u62bd\u51fa<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-76\">in_array()\u3068array_search()\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li>        <a href=\"#i-83\">array_key_exists()\u306e\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-88\">\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u306e\u62bd\u51fa\uff08array_filter()\uff09<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-94\">\u691c\u7d22\u3068\u62bd\u51fa\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-98\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af4\uff1a\u30bd\u30fc\u30c8\u3068\u9806\u5e8f\u64cd\u4f5c<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-99\">sort()\u3001rsort()\u306b\u3088\u308b\u57fa\u672c\u7684\u306a\u30bd\u30fc\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-103\">asort()\u3001ksort()\u306b\u3088\u308b\u30ad\u30fc\u30fb\u5024\u3092\u7dad\u6301\u3057\u305f\u30bd\u30fc\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-107\">usort()\u306b\u3088\u308b\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u95a2\u6570\u306e\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-113\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-118\">\u30bd\u30fc\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5b89\u5b9a\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-123\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af5\uff1a\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-124\">array_map()\u3092\u4f7f\u3063\u305f\u8981\u7d20\u306e\u4e00\u62ec\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-130\">array_reduce()\u306b\u3088\u308b\u30c7\u30fc\u30bf\u306e\u96c6\u8a08<\/a>      <\/li>      <li>        <a href=\"#i-135\">array_walk()\u3092\u4f7f\u3063\u305f\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c<\/a>      <\/li>      <li>        <a href=\"#i-141\">array_map()\u3001array_reduce()\u3001array_walk()\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-143\">\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-147\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af6\uff1a\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-148\">array_keys()\u3068array_values()\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-154\">array_flip()\u306b\u3088\u308b\u30ad\u30fc\u3068\u5024\u306e\u5165\u308c\u66ff\u3048<\/a>      <\/li>      <li>        <a href=\"#i-159\">\u914d\u5217\u306e\u30ad\u30fc\u540d\u3092\u5909\u66f4\u3059\u308b\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-164\">\u5b9f\u8df5\u7684\u306a\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-173\">\u7570\u306a\u308b\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u6bd4\u8f03\u3068\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-178\">\u914d\u5217\u51e6\u7406\u306e\u6700\u9069\u5316\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-179\">foreach\u6587\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-185\">\u53c2\u7167\u6e21\u3057\u306b\u3088\u308b\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-190\">\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-195\">\u591a\u6b21\u5143\u914d\u5217\u306e\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-200\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-204\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/a>      <\/li>      <li>        <a href=\"#i-209\">array_key_first()\u3068array_key_last()\u306e\u4fbf\u5229\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-213\">null\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u3068\u914d\u5217\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>      <li>        <a href=\"#i-218\">\u305d\u306e\u4ed6\u306ePHP 7\/8\u306e\u914d\u5217\u95a2\u9023\u65b0\u6a5f\u80fd<\/a>      <\/li>      <li>        <a href=\"#i-224\">\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-228\">\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08\u2026\uff09\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-236\">\u914d\u5217\u64cd\u4f5c\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u305d\u306e\u89e3\u6d88\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-241\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6e2c\u5b9a\u3068\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-244\">\u6700\u9069\u5316\u306e\u5b9f\u8df5\u4f8b\uff1a\u914d\u5217\u64cd\u4f5c\u306e\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3<\/a>      <\/li>      <li>        <a href=\"#i-248\">\u914d\u5217\u306e\u4ee3\u66ff\u30c7\u30fc\u30bf\u69cb\u9020<\/a>      <\/li>      <li>        <a href=\"#i-252\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u914d\u5217\u306e\u6700\u9069\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-257\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-262\">\u201cInvalid argument supplied for foreach()\u201d\u306e\u89e3\u6c7a\u7b56<\/a>      <\/li>      <li>        <a href=\"#i-269\">\u914d\u5217\u64cd\u4f5c\u6642\u306e\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-275\">\u305d\u306e\u4ed6\u306e\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-280\">\u914d\u5217\u30a8\u30e9\u30fc\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-285\">\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-286\">\u201cUndefined index\u201d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-290\">JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-295\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c<\/a>      <\/li>      <li>        <a href=\"#i-299\">\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u5909\u63db\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-301\">JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-306\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c<\/a>      <\/li>      <li>        <a href=\"#i-311\">\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0<\/a>      <\/li>      <li>        <a href=\"#i-315\">\u914d\u5217\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/a>      <\/li>      <li>        <a href=\"#i-320\">\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0<\/a>      <\/li>      <li>        <a href=\"#i-324\">\u914d\u5217\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/a>      <\/li>      <li>        <a href=\"#i-327\">Xdebug\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-333\">\u4e00\u822c\u7684\u306a\u914d\u5217\u30c7\u30d0\u30c3\u30b0\u306e\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/a>      <\/li>      <li>        <a href=\"#i-339\">\u914d\u5217\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u3068\u30c7\u30d0\u30c3\u30b0<\/a>      <\/li>      <li>        <a href=\"#i-344\">print_r()\u3068var_dump()\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li>        <a href=\"#i-349\">\u5927\u898f\u6a21\u914d\u5217\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-354\">\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-355\">\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-356\">\u4eca\u5f8c\u306e\u5b66\u7fd2\u65b9\u5411<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-357\">PHP\u914d\u5217\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u306e\u632f\u308a\u8fd4\u308a<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-358\">\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09Q&amp;A\uff1a\u3088\u304f\u3042\u308b\u914d\u5217\u306b\u95a2\u3059\u308b\u8cea\u554f<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-359\">\u300c\u914d\u5217\u3068\u9023\u60f3\u914d\u5217\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f\u300d<\/a>      <\/li>      <li>        <a href=\"#i-365\">\u300cPHP\u306e\u914d\u5217\u306f\u306a\u305c\u4ed6\u306e\u8a00\u8a9e\u3088\u308a\u67d4\u8edf\u306a\u306e\u3067\u3059\u304b\uff1f\u300d<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-369\">\u300c\u914d\u5217\u3068\u4ed6\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u3069\u3046\u4f7f\u3044\u5206\u3051\u308b\u3079\u304d\u3067\u3059\u304b\uff1f\u300d<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p>PHP\u3067\u306eWeb\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u914d\u5217\u306f\u6700\u3082\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u4e00\u3064\u3067\u3059\u3002\u30b7\u30f3\u30d7\u30eb\u306a\u30c7\u30fc\u30bf\u30ea\u30b9\u30c8\u304b\u3089\u8907\u96d1\u306a\u591a\u6b21\u5143\u30c7\u30fc\u30bf\u69cb\u9020\u307e\u3067\u3001\u914d\u5217\u306f\u3042\u3089\u3086\u308b\u30c7\u30fc\u30bf\u64cd\u4f5c\u306e\u57fa\u76e4\u3068\u306a\u308a\u307e\u3059\u3002\u5b9f\u969b\u3001\u914d\u5217\u3092\u4f7f\u3044\u3053\u306a\u305b\u308b\u304b\u3069\u3046\u304b\u304c\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u304b\u3069\u3046\u304b\u3092\u5927\u304d\u304f\u5de6\u53f3\u3059\u308b\u3068\u3044\u3063\u3066\u3082\u904e\u8a00\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u6bd4\u8f03\u3057\u3066\u975e\u5e38\u306b\u67d4\u8edf\u3067\u5f37\u529b\u3067\u3059\u3002\u305d\u306e\u7406\u7531\u306f\u3001PHP\u306e\u914d\u5217\u304c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u6027\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u3089\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8907\u6570\u306e\u30c7\u30fc\u30bf\u578b\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/strong><\/li>\n\n\n\n<li><strong>\u9806\u5e8f\u4ed8\u304d\u30ea\u30b9\u30c8\u3068\u9023\u60f3\u914d\u5217\uff08\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\uff09\u306e\u4e21\u65b9\u306e\u6027\u8cea\u3092\u6301\u3064<\/strong><\/li>\n\n\n\n<li><strong>\u52d5\u7684\u306b\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3067\u304d\u308b<\/strong><\/li>\n\n\n\n<li><strong>\u8c4a\u5bcc\u306a\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u306b\u3088\u308b\u30c7\u30fc\u30bf\u64cd\u4f5c\u304c\u53ef\u80fd<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u306e\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u64cd\u4f5c\u3001API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u51e6\u7406\u306a\u3069\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u3042\u3089\u3086\u308b\u5834\u9762\u3067\u914d\u5217\u304c\u6d3b\u8e8d\u3057\u307e\u3059\u3002\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\u6271\u3048\u306a\u3051\u308c\u3070\u3001\u3053\u308c\u3089\u306e\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u3067\u3082\u5197\u9577\u3067\u975e\u52b9\u7387\u306a\u30b3\u30fc\u30c9\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/h3>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001PHP\u914d\u5217\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u304b\u3089\u9ad8\u5ea6\u306a\u4f7f\u7528\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u3001\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u30ab\u30d0\u30fc\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u57fa\u672c\u6982\u5ff5\u3068\u4f5c\u6210\u65b9\u6cd5<\/strong><\/li>\n\n\n\n<li><strong>\u3055\u307e\u3056\u307e\u306a\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af\uff08\u8ffd\u52a0\u30fb\u524a\u9664\u30fb\u7d50\u5408\u30fb\u691c\u7d22\u306a\u3069\uff09<\/strong><\/li>\n\n\n\n<li><strong>\u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u65b9\u6cd5<\/strong><\/li>\n\n\n\n<li><strong>PHP7\/8\u3067\u8ffd\u52a0\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u306e\u6d3b\u7528\u6cd5<\/strong><\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u914d\u5217\u64cd\u4f5c\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/li>\n\n\n\n<li><strong>\u5b9f\u52d9\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u5404\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u7406\u8ad6\u7684\u306a\u8aac\u660e\u3060\u3051\u3067\u306a\u304f\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3082\u591a\u6570\u7d39\u4ecb\u3057\u3001\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u3059\u3050\u306b\u6d3b\u7528\u3067\u304d\u308b\u77e5\u8b58\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u5bfe\u8c61\u8aad\u8005<\/h3>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u4e3b\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u65b9\u3005\u3092\u5bfe\u8c61\u3068\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PHP\u306e\u57fa\u672c\u69cb\u6587\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u521d\u5fc3\u8005\u301c\u4e2d\u7d1a\u8005\u306e\u30a8\u30f3\u30b8\u30cb\u30a2<\/strong><\/li>\n\n\n\n<li><strong>\u914d\u5217\u306e\u57fa\u672c\u306f\u77e5\u3063\u3066\u3044\u308b\u304c\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9\u3092\u5b66\u3073\u305f\u3044\u65b9<\/strong><\/li>\n\n\n\n<li><strong>PHP7\/8\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u6700\u65b0\u306e\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af\u3092\u77e5\u308a\u305f\u3044\u65b9<\/strong><\/li>\n\n\n\n<li><strong>\u5b9f\u52d9\u3067\u906d\u9047\u3059\u308b\u914d\u5217\u95a2\u9023\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u305f\u3044\u65b9<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u57fa\u672c\u7684\u306aPHP\u306e\u6587\u6cd5\u3084\u5909\u6570\u306e\u6982\u5ff5\u306b\u3064\u3044\u3066\u306f\u7406\u89e3\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u914d\u5217\u306b\u95a2\u3057\u3066\u306f\u57fa\u790e\u304b\u3089\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001PHP\u3092\u59cb\u3081\u305f\u3070\u304b\u308a\u306e\u65b9\u3082\u5b89\u5fc3\u3057\u3066\u8aad\u307f\u9032\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u3001PHP\u306e\u914d\u5217\u306e\u4e16\u754c\u3092\u4e00\u7dd2\u306b\u63a2\u691c\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u8a18\u4e8b\u3092\u6700\u5f8c\u307e\u3067\u8aad\u3081\u3070\u3001\u914d\u5217\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u64cd\u4f5c\u306e\u5e45\u304c\u5927\u304d\u304f\u5e83\u304c\u308a\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">PHP\u306e\u914d\u5217\u3068\u306f<\/h2>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u3001\u5358\u4e00\u306e\u5909\u6570\u306b\u8907\u6570\u306e\u5024\u3092\u683c\u7d0d\u3067\u304d\u308b\u7279\u6b8a\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u5358\u306a\u308b\u30c7\u30fc\u30bf\u306e\u96c6\u5408\u4ee5\u4e0a\u306e\u3082\u306e\u3067\u3042\u308a\u3001PHP\u306e\u914d\u5217\u306f\u975e\u5e38\u306b\u67d4\u8edf\u304b\u3064\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u4ed6\u8a00\u8a9e\u3068\u6bd4\u8f03\u3057\u305fPHP\u914d\u5217\u306e\u7279\u5fb4<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u914d\u5217\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001\u3044\u304f\u3064\u304b\u306e\u9855\u8457\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-c9e347b8-bd50-445d-861a-45fd31cca191\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8a00\u8a9e<\/th><th>\u914d\u5217\u306e\u7279\u5fb4<\/th><th>PHP\u3068\u306e\u4e3b\u306a\u9055\u3044<\/th><\/tr><\/thead><tbody><tr><td>C\/C++<\/td><td>\u56fa\u5b9a\u30b5\u30a4\u30ba\u3001\u540c\u4e00\u578b\u306e\u307f<\/td><td>PHP\u306f\u52d5\u7684\u30b5\u30a4\u30ba\u3067\u7570\u306a\u308b\u578b\u306e\u6df7\u5728\u304c\u53ef\u80fd<\/td><\/tr><tr><td>Java<\/td><td>\u578b\u304c\u56fa\u5b9a\u3001\u30b5\u30a4\u30ba\u56fa\u5b9a<\/td><td>\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u306e\u8981\u7d20\u3092\u540c\u4e00\u914d\u5217\u306b\u683c\u7d0d\u3067\u304d\u306a\u3044<\/td><\/tr><tr><td>JavaScript<\/td><td>\u52d5\u7684\u3001\u7570\u306a\u308b\u578b\u306e\u6df7\u5728\u53ef\u80fd<\/td><td>PHP\u306e\u914d\u5217\u306f\u9023\u60f3\u914d\u5217\u306e\u7279\u6027\u304c\u3088\u308a\u5f37\u3044<\/td><\/tr><tr><td>Python<\/td><td>\u30ea\u30b9\u30c8(\u53ef\u5909)\u3068\u8f9e\u66f8(\u9023\u60f3\u914d\u5217)\u304c\u5225\u7269<\/td><td>PHP\u306f\u4e21\u65b9\u306e\u6a5f\u80fd\u30921\u3064\u306e\u30c7\u30fc\u30bf\u578b\u3067\u5b9f\u73fe<\/td><\/tr><tr><td>Ruby<\/td><td>\u914d\u5217\u3068\u9023\u60f3\u914d\u5217(Hash)\u304c\u5225\u7269<\/td><td>\u540c\u4e0a<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>PHP\u306e\u5927\u304d\u306a\u7279\u5fb4\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3068\u9023\u60f3\u914d\u5217\u304c\u540c\u4e00\u306e\u30c7\u30fc\u30bf\u578b\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u3042\u308b\u53cd\u9762\u3001\u521d\u5fc3\u8005\u306b\u306f\u6df7\u4e71\u306e\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u4f8b\n$fruits = [\"apple\", \"banana\", \"cherry\"];\necho $fruits[0]; \/\/ \"apple\" \u3092\u51fa\u529b\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u4f8b\n$person = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"Tokyo\"\n];\necho $person[\"name\"]; \/\/ \"John\" \u3092\u51fa\u529b\n\n\/\/ \u6df7\u5408\u914d\u5217\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u9023\u60f3\u30ad\u30fc\u306e\u6df7\u5728\uff09\n$mixed = [\n    0 =&gt; \"First item\",\n    \"key\" =&gt; \"Named item\",\n    1 =&gt; \"Second item\"\n];\necho $mixed[0]; \/\/ \"First item\" \u3092\u51fa\u529b\necho $mixed[\"key\"]; \/\/ \"Named item\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">PHP\u306e\u914d\u5217\u304c\u5b9f\u969b\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u3067\u3042\u308b\u7406\u7531<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u304c\u4ed6\u8a00\u8a9e\u3068\u5927\u304d\u304f\u7570\u306a\u308b\u70b9\u306f\u3001\u5185\u90e8\u7684\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\uff08\u9023\u60f3\u914d\u5217\uff09\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u306f\u91cd\u8981\u306a\u610f\u5473\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u3059\u3079\u3066\u306e\u30ad\u30fc\u304c\u30cf\u30c3\u30b7\u30e5\u5024\u306b\u5909\u63db\u3055\u308c\u308b<\/strong>\uff1a\u6570\u5024\u30ad\u30fc\u3067\u3042\u3063\u3066\u3082\u5185\u90e8\u7684\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u5316\u3055\u308c\u307e\u3059<\/li>\n\n\n\n<li><strong>\u9806\u5e8f\u304c\u4fdd\u6301\u3055\u308c\u308b<\/strong>\uff1aPHP 7\u4ee5\u964d\u3001\u914d\u5217\u306e\u633f\u5165\u9806\u5e8f\u306f\u5e38\u306b\u4fdd\u6301\u3055\u308c\u307e\u3059<\/li>\n\n\n\n<li><strong>\u691c\u7d22\u304c\u9ad8\u901f<\/strong>\uff1a\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u306e\u304a\u304b\u3052\u3067\u3001\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c O(1) \u306e\u6642\u9593\u8907\u96d1\u6027\u3067\u53ef\u80fd\u3067\u3059<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5185\u90e8\u7684\u306b\u306f\u4e21\u65b9\u3068\u3082\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u69cb\u9020\n$array1 = [10, 20, 30];\n$array2 = [0 =&gt; 10, 1 =&gt; 20, 2 =&gt; 30];\n\nvar_dump($array1 === $array2); \/\/ bool(true) \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p>\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001PHP\u306e\u914d\u5217\u306f\u6570\u5024\u30ad\u30fc\u306e\u914d\u5217\u3068\u3057\u3066\u3082\u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u3082\u632f\u308b\u821e\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u3001PHP\u306b\u304a\u3051\u308b\u914d\u5217\u3068\u306f\u300c\u9806\u5e8f\u4ed8\u304d\u30de\u30c3\u30d7\u300d\u3068\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3088\u308a\u6b63\u78ba\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u30ad\u30fc\uff08\u6574\u6570\u307e\u305f\u306f\u6587\u5b57\u5217\uff09\u3068\u5024\u306e\u30da\u30a2\u3092\u9806\u5e8f\u4ed8\u304d\u3067\u4fdd\u5b58\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u914d\u5217\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>PHP\u3067\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u591a\u5c90\u306b\u308f\u305f\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u30b0\u30eb\u30fc\u30d7\u5316<\/strong>\uff1a\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u3092\u8ad6\u7406\u7684\u306b\u3072\u3068\u307e\u3068\u3081\u306b\u3067\u304d\u307e\u3059 <code>\/\/ \u30b0\u30eb\u30fc\u30d7\u5316\u524d $userName = \"John\"; $userAge = 30; $userEmail = \"john@example.com\"; \/\/ \u30b0\u30eb\u30fc\u30d7\u5316\u5f8c $user = [ \"name\" =&gt; \"John\", \"age\" =&gt; 30, \"email\" =&gt; \"john@example.com\" ];<\/code><\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u306e\u53cd\u5fa9\u51e6\u7406\u304c\u5bb9\u6613<\/strong>\uff1aforeach\u6587\u3092\u4f7f\u3063\u3066\u7c21\u5358\u306b\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3067\u304d\u307e\u3059 <code>$scores = [85, 92, 78, 96, 88]; $total = 0; foreach ($scores as $score) { $total += $score; } $average = $total \/ count($scores); echo \"\u5e73\u5747\u70b9: \" . $average; \/\/ \"\u5e73\u5747\u70b9: 87.8\" \u3092\u51fa\u529b<\/code><\/li>\n\n\n\n<li><strong>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u8868\u73fe<\/strong>\uff1a\u591a\u6b21\u5143\u914d\u5217\u3092\u4f7f\u3063\u3066\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u968e\u5c64\u3092\u8868\u73fe\u3067\u304d\u307e\u3059 <code>$employees = [ [ \"name\" =&gt; \"\u7530\u4e2d\u592a\u90ce\", \"department\" =&gt; \"\u55b6\u696d\", \"skills\" =&gt; [\"\u4ea4\u6e09\", \"\u30d7\u30ec\u30bc\u30f3\", \"\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\"] ], [ \"name\" =&gt; \"\u4f50\u85e4\u82b1\u5b50\", \"department\" =&gt; \"\u958b\u767a\", \"skills\" =&gt; [\"PHP\", \"JavaScript\", \"AWS\"] ] ]; echo $employees[1][\"name\"]; \/\/ \"\u4f50\u85e4\u82b1\u5b50\" \u3092\u51fa\u529b echo $employees[1][\"skills\"][0]; \/\/ \"PHP\" \u3092\u51fa\u529b<\/code><\/li>\n\n\n\n<li><strong>\u8c4a\u5bcc\u306a\u7d44\u307f\u8fbc\u307f\u95a2\u6570<\/strong>\uff1aPHP\u306b\u306f\u914d\u5217\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u304c100\u4ee5\u4e0a\u3042\u308a\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u52a0\u5de5\u304c\u7c21\u5358\u306b\u3067\u304d\u307e\u3059 <code>$numbers = [5, 3, 8, 2, 1, 7]; \/\/ \u30bd\u30fc\u30c8 sort($numbers); print_r($numbers); \/\/ [1, 2, 3, 5, 7, 8] \u3092\u51fa\u529b \/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0 $filtered = array_filter($numbers, function($n) { return $n &gt; 3; }); print_r($filtered); \/\/ [5, 7, 8] \u3092\u51fa\u529b\uff08\u30ad\u30fc\u306f\u4fdd\u6301\u3055\u308c\u307e\u3059\uff09<\/code><\/li>\n\n\n\n<li><strong>\u30e1\u30e2\u30ea\u52b9\u7387<\/strong>\uff1a\u500b\u5225\u306e\u5909\u6570\u3092\u305f\u304f\u3055\u3093\u4f5c\u308b\u3088\u308a\u3082\u3001\u914d\u5217\u3092\u4f7f\u3046\u65b9\u304c\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u304f\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059<\/li>\n<\/ol>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u3001\u305d\u306e\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u30d9\u30fc\u30b9\u306e\u5b9f\u88c5\u3068\u67d4\u8edf\u6027\u306b\u3088\u308a\u3001\u307b\u307c\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u64cd\u4f5c\u30bf\u30b9\u30af\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u6c4e\u7528\u7684\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u5358\u7d14\u306a\u30ea\u30b9\u30c8\u304b\u3089\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u307e\u3067\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u914d\u5217\u306f\u6b20\u304b\u305b\u306a\u3044\u5b58\u5728\u3068\u3044\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">PHP\u914d\u5217\u306e\u57fa\u672c<\/h2>\n\n\n\n<p>PHP\u3067\u914d\u5217\u3092\u6271\u3046\u969b\u306e\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u52b9\u7387\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u914d\u5217\u306e\u4f5c\u6210\u65b9\u6cd5\u3001\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u3001\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u914d\u5217\u306e\u4f5c\u6210\u65b9\u6cd5\uff08array()\u95a2\u6570\u3068[]\u8a18\u6cd5\u306e\u9055\u3044\uff09<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u4e3b\u306b2\u3064\u306e\u65b9\u6cd5\u3067\u914d\u5217\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\uff1a\u5f93\u6765\u306e<code>array()<\/code>\u95a2\u6570\u3068\u3001PHP 5.4\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u77ed\u7e2e\u69cb\u6587<code>[]<\/code>\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">array()\u95a2\u6570\u306b\u3088\u308b\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$fruits = array(\"apple\", \"banana\", \"orange\");\n\n\/\/ \u9023\u60f3\u914d\u5217\n$person = array(\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n);\n\n\/\/ \u6df7\u5408\u914d\u5217\n$mixed = array(\n    0 =&gt; \"First\",\n    \"key\" =&gt; \"Value\",\n    1 =&gt; \"Second\"\n);\n\n\/\/ \u7a7a\u306e\u914d\u5217\n$empty = array();\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u77ed\u7e2e\u69cb\u6587[]\u306b\u3088\u308b\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$fruits = [\"apple\", \"banana\", \"orange\"];\n\n\/\/ \u9023\u60f3\u914d\u5217\n$person = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n];\n\n\/\/ \u6df7\u5408\u914d\u5217\n$mixed = [\n    0 =&gt; \"First\",\n    \"key\" =&gt; \"Value\",\n    1 =&gt; \"Second\"\n];\n\n\/\/ \u7a7a\u306e\u914d\u5217\n$empty = [];\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">\u4e21\u69cb\u6587\u306e\u9055\u3044<\/h4>\n\n\n\n<p>\u4e21\u65b9\u306e\u69cb\u6587\u306f\u6a5f\u80fd\u7684\u306b\u306f\u540c\u3058\u3067\u3059\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u9055\u3044\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-f065cf21-cce0-4414-9046-735521dd41c1\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>array()<\/th><th>[]<\/th><\/tr><\/thead><tbody><tr><td>\u4e92\u63db\u6027<\/td><td>PHP\u5168\u30d0\u30fc\u30b8\u30e7\u30f3<\/td><td>PHP 5.4\u4ee5\u964d<\/td><\/tr><tr><td>\u69cb\u6587\u306e\u9577\u3055<\/td><td>\u9577\u3044<\/td><td>\u77ed\u3044<\/td><\/tr><tr><td>\u5b9f\u884c\u901f\u5ea6<\/td><td>\u308f\u305a\u304b\u306b\u9045\u3044<\/td><td>\u308f\u305a\u304b\u306b\u901f\u3044<\/td><\/tr><tr><td>\u53ef\u8aad\u6027<\/td><td>\u5f93\u6765\u578b<\/td><td>\u30e2\u30c0\u30f3\u3067\u7c21\u6f54<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u6700\u8fd1\u306ePHP\u30b3\u30fc\u30c9\u3067\u306f\u3001\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u3044<code>[]<\/code>\u8a18\u6cd5\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001PHP 5.3\u4ee5\u524d\u306e\u74b0\u5883\u3067\u52d5\u4f5c\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001<code>array()<\/code>\u69cb\u6587\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001\u89d2\u62ec\u5f27<code>[]<\/code>\u5185\u306b\u30ad\u30fc\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u307e\u305f\u306f\u6587\u5b57\u5217\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-14\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\"];\n\necho $fruits[0]; \/\/ \"apple\" \u3092\u51fa\u529b\necho $fruits[1]; \/\/ \"banana\" \u3092\u51fa\u529b\necho $fruits[2]; \/\/ \"orange\" \u3092\u51fa\u529b\n\n\/\/ \u5b58\u5728\u3057\u306a\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\necho $fruits[3]; \/\/ Notice: Undefined offset: 3 (PHP 7.4\u4ee5\u524d)\n                \/\/ Warning: Undefined array key 3 (PHP 8.0\u4ee5\u964d)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">\u9023\u60f3\u914d\u5217\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$person = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n];\n\necho $person[\"name\"]; \/\/ \"John\" \u3092\u51fa\u529b\necho $person[\"age\"];  \/\/ 30 \u3092\u51fa\u529b\necho $person[\"city\"]; \/\/ \"New York\" \u3092\u51fa\u529b\n\n\/\/ \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\necho $person[\"country\"]; \/\/ Notice: Undefined index: country (PHP 7.4\u4ee5\u524d)\n                        \/\/ Warning: Undefined array key \"country\" (PHP 8.0\u4ee5\u964d)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u591a\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$employees = [\n    [\n        \"name\" =&gt; \"\u7530\u4e2d\",\n        \"department\" =&gt; \"\u55b6\u696d\",\n        \"skills\" =&gt; [\"\u4ea4\u6e09\", \"\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\"]\n    ],\n    [\n        \"name\" =&gt; \"\u4f50\u85e4\",\n        \"department\" =&gt; \"\u958b\u767a\",\n        \"skills\" =&gt; [\"PHP\", \"JavaScript\"]\n    ]\n];\n\n\/\/ \u4e8c\u6b21\u5143\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $employees[1][\"name\"]; \/\/ \"\u4f50\u85e4\" \u3092\u51fa\u529b\n\n\/\/ \u4e09\u6b21\u5143\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $employees[1][\"skills\"][0]; \/\/ \"PHP\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">\u5909\u6570\u3092\u4f7f\u3063\u305f\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<p>\u30ad\u30fc\u306b\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$key = \"name\";\necho $person[$key]; \/\/ \"John\" \u3092\u51fa\u529b\n\n$index = 1;\necho $fruits[$index]; \/\/ \"banana\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">\u30a8\u30e9\u30fc\u56de\u907f\u306e\u305f\u3081\u306enull\u5408\u4f53\u6f14\u7b97\u5b50\uff08PHP 7\u4ee5\u964d\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7\u4ee5\u964d\u3067\u306f\u3001\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306bnull\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\n$country = $person[\"country\"] ?? \"Unknown\"; \/\/ \"Unknown\" \u3092\u8a2d\u5b9a\necho $country; \/\/ \"Unknown\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u914d\u5217\u306e\u8ffd\u52a0\u30fb\u5909\u66f4\u30fb\u524a\u9664\u306e\u57fa\u672c\u64cd\u4f5c<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u8981\u7d20\u3092\u64cd\u4f5c\u3059\u308b\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-20\">\u8981\u7d20\u306e\u8ffd\u52a0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306b\u8981\u7d20\u3092\u8ffd\u52a0\uff08\u672b\u5c3e\u306b\u8ffd\u52a0\u3055\u308c\u308b\uff09\n$fruits = [\"apple\", \"banana\"];\n$fruits[] = \"orange\"; \/\/ $fruits \u306f [\"apple\", \"banana\", \"orange\"] \u306b\u306a\u308b\n\n\/\/ \u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n$fruits[3] = \"grape\"; \/\/ $fruits \u306f [\"apple\", \"banana\", \"orange\", \"grape\"] \u306b\u306a\u308b\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u9699\u9593\u3092\u4f5c\u308b\n$fruits[5] = \"melon\"; \/\/ $fruits \u306f [\"apple\", \"banana\", \"orange\", \"grape\", null, \"melon\"] \u306b\u306a\u308b\n\n\/\/ \u9023\u60f3\u914d\u5217\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n$person = [\"name\" =&gt; \"John\", \"age\" =&gt; 30];\n$person[\"city\"] = \"New York\"; \/\/ $person \u306b \"city\" \u30ad\u30fc\u3067\u8981\u7d20\u3092\u8ffd\u52a0\n$person[\"country\"] = \"USA\"; \/\/ $person \u306b \"country\" \u30ad\u30fc\u3067\u8981\u7d20\u3092\u8ffd\u52a0\n\n\/\/ \u65e2\u5b58\u306e\u914d\u5217\u306b\u5225\u306e\u914d\u5217\u3092\u8ffd\u52a0\uff08PHP 7.4\u4ee5\u964d\uff09\n$more_info = [\"job\" =&gt; \"Engineer\", \"salary\" =&gt; 5000];\n$person = [...$person, ...$more_info]; \/\/ \u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306b\u3088\u308b\u914d\u5217\u306e\u7d50\u5408\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-21\">\u8981\u7d20\u306e\u5909\u66f4<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u65e2\u5b58\u306e\u8981\u7d20\u3092\u5909\u66f4\n$fruits = [\"apple\", \"banana\", \"orange\"];\n$fruits[1] = \"kiwi\"; \/\/ $fruits \u306f [\"apple\", \"kiwi\", \"orange\"] \u306b\u306a\u308b\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u8981\u7d20\u3092\u5909\u66f4\n$person = [\"name\" =&gt; \"John\", \"age\" =&gt; 30];\n$person[\"age\"] = 31; \/\/ $person[\"age\"] \u304c 31 \u306b\u66f4\u65b0\u3055\u308c\u308b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u8981\u7d20\u306e\u524a\u9664<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ unset() \u3092\u4f7f\u3063\u305f\u7279\u5b9a\u8981\u7d20\u306e\u524a\u9664\n$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\nunset($fruits[1]); \/\/ \"banana\" \u3092\u524a\u9664\n\/\/ $fruits \u306f [\"apple\", \"orange\", \"grape\"] \u3067\u306f\u306a\u304f\u3001[\"apple\", 2 =&gt; \"orange\", 3 =&gt; \"grape\"] \u306b\u306a\u308b\u70b9\u306b\u6ce8\u610f\uff01\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u81ea\u52d5\u7684\u306b\u8a70\u3081\u3089\u308c\u306a\u3044\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u8981\u7d20\u524a\u9664\n$person = [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"city\" =&gt; \"New York\"];\nunset($person[\"city\"]); \/\/ \"city\" \u30ad\u30fc\u3068\u305d\u306e\u5024\u3092\u524a\u9664\n\/\/ $person \u306f [\"name\" =&gt; \"John\", \"age\" =&gt; 30] \u306b\u306a\u308b\n\n\/\/ \u914d\u5217\u5168\u4f53\u3092\u524a\u9664\nunset($fruits); \/\/ $fruits \u5909\u6570\u81ea\u4f53\u304c\u672a\u5b9a\u7fa9\u306b\u306a\u308b\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a70\u3081\u3066\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u306b\u306f array_values() \u3092\u4f7f\u7528\n$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\nunset($fruits[1]);\n$fruits = array_values($fruits); \/\/ $fruits \u306f [\"apple\", \"orange\", \"grape\"] \u306b\u306a\u308b\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u8a70\u3081\u3089\u308c\u308b\uff09\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u305d\u306e\u4ed6\u306e\u4fbf\u5229\u306a\u95a2\u6570<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\n$fruits = [\"apple\", \"banana\", \"orange\"];\necho count($fruits); \/\/ 3 \u3092\u51fa\u529b\n\n\/\/ \u914d\u5217\u306b\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n$person = [\"name\" =&gt; \"John\", \"age\" =&gt; 30];\nvar_dump(isset($person[\"name\"])); \/\/ bool(true) \u3092\u51fa\u529b\nvar_dump(isset($person[\"email\"])); \/\/ bool(false) \u3092\u51fa\u529b\n\n\/\/ array_key_exists() \u3067\u3082\u30ad\u30fc\u306e\u5b58\u5728\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff08isset() \u3068\u306e\u9055\u3044\u306f\u5f8c\u8ff0\uff09\nvar_dump(array_key_exists(\"name\", $person)); \/\/ bool(true) \u3092\u51fa\u529b\n\n\/\/ \u914d\u5217\u306b\u5024\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n$fruits = [\"apple\", \"banana\", \"orange\"];\nvar_dump(in_array(\"banana\", $fruits)); \/\/ bool(true) \u3092\u51fa\u529b\nvar_dump(in_array(\"grape\", $fruits)); \/\/ bool(false) \u3092\u51fa\u529b\n\n\/\/ \u914d\u5217\u306e\u5024\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$key = array_search(\"banana\", $fruits); \/\/ $key \u306f 1\necho $key; \/\/ 1 \u3092\u51fa\u529b\n\n\/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f false \u304c\u8fd4\u3055\u308c\u308b\n$key = array_search(\"grape\", $fruits);\nvar_dump($key); \/\/ bool(false) \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u5f37\u529b\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u4f5c\u6210\u65b9\u6cd5\u3001\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u3001\u8ffd\u52a0\u30fb\u5909\u66f4\u30fb\u524a\u9664\u306e\u64cd\u4f5c\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3082\u30b9\u30e0\u30fc\u30ba\u306b\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u306e\u7570\u306a\u308b\u7a2e\u985e\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u7528\u9014\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-24\">\u914d\u5217\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/h2>\n\n\n\n<p>PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u3001\u591a\u304f\u306e\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u4e3b\u306a\u914d\u5217\u306e\u7a2e\u985e\u3068\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3001\u6700\u9069\u306a\u6d3b\u7528\u30b7\u30fc\u30f3\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u7279\u5fb4\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306f\u3001\u8981\u7d20\u306b0\u304b\u3089\u59cb\u307e\u308b\u9023\u7d9a\u3057\u305f\u6574\u6570\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u914d\u5217\u3067\u3059\u3002\u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5272\u308a\u632f\u3089\u308c\u308b\u305f\u3081\u3001\u9806\u5e8f\u304c\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3046\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">\u7279\u5fb4<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u81ea\u52d5\u7684\u306b0\u304b\u3089\u59cb\u307e\u308b\u9023\u756a\u3067\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/li>\n\n\n\n<li>\u8981\u7d20\u306e\u8ffd\u52a0\u6642\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u6700\u5927\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9+1\u306e\u4f4d\u7f6e\u306b\u8ffd\u52a0\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u4e3b\u306b\u9806\u5e8f\u4ed8\u304d\u30c7\u30fc\u30bf\u306e\u30ea\u30b9\u30c8\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u8981\u7d20\u306e\u524a\u9664\u6642\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u81ea\u52d5\u7684\u306b\u8a70\u3081\u3089\u308c\u306a\u3044\uff08array_values()\u3067\u518d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u304c\u5fc5\u8981\uff09<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u4f5c\u6210\n$fruits = [\"apple\", \"banana\", \"orange\"];\n\n\/\/ \u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\uff08\u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b93\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\uff09\n$fruits[] = \"grape\";\n\n\/\/ \u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u3066\u8ffd\u52a0\n$fruits[4] = \"melon\";\n\n\/\/ \u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u5834\u5408\u306b\u4fbf\u5229\nforeach ($fruits as $fruit) {\n    echo $fruit . \" \";  \/\/ \"apple banana orange grape melon\" \u3092\u51fa\u529b\n}\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3082\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u5834\u5408\nforeach ($fruits as $index =&gt; $fruit) {\n    echo \"Index {$index}: {$fruit}\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u6d3b\u7528\u30b7\u30fc\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9806\u5e8f\u304c\u91cd\u8981\u306a\u30a2\u30a4\u30c6\u30e0\u306e\u30ea\u30b9\u30c8<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30cb\u30e5\u30fc\u9805\u76ee<\/li>\n\n\n\n<li>\u624b\u9806\u306e\u30b9\u30c6\u30c3\u30d7<\/li>\n\n\n\n<li>\u30e9\u30f3\u30ad\u30f3\u30b0\u30c7\u30fc\u30bf<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d0\u30c3\u30c1\u51e6\u7406\u30c7\u30fc\u30bf<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4e00\u62ec\u51e6\u7406\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>\u51e6\u7406\u30ad\u30e5\u30fc<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\u306a\u30c7\u30fc\u30bf<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u6642\u7cfb\u5217\u30c7\u30fc\u30bf<\/li>\n\n\n\n<li>\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5358\u7d14\u306a\u30eb\u30fc\u30d7\u51e6\u7406<\/strong> <code>$students = [\"Tanaka\", \"Suzuki\", \"Yamada\"]; for ($i = 0; $i &lt; count($students); $i++) { echo \"Student \" . ($i + 1) . \": \" . $students[$i] . \"\\n\"; }<\/code><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u9023\u60f3\u914d\u5217\uff08\u30ad\u30fc\u30fb\u30d0\u30ea\u30e5\u30fc\u914d\u5217\uff09\u306e\u7279\u5fb4\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>\u9023\u60f3\u914d\u5217\u306f\u3001\u4efb\u610f\u306e\u6587\u5b57\u5217\u3084\u6574\u6570\u3092\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u3057\u3001\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308b\u5024\u3092\u683c\u7d0d\u3059\u308b\u914d\u5217\u3067\u3059\u3002\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3067\u69cb\u6210\u3055\u308c\u3001\u30c7\u30fc\u30bf\u306e\u610f\u5473\u3092\u660e\u78ba\u306b\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">\u7279\u5fb4<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30fc\u306b\u306f\u6587\u5b57\u5217\u307e\u305f\u306f\u6574\u6570\u3092\u4f7f\u7528\u53ef\u80fd<\/li>\n\n\n\n<li>\u30ad\u30fc\u3092\u901a\u3058\u3066\u5024\u306b\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u30ad\u30fc\u306e\u9806\u5e8f\u306f\u633f\u5165\u9806\u304c\u7dad\u6301\u3055\u308c\u308b\uff08PHP 7\u4ee5\u964d\uff09<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3088\u3046\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd\uff08\u305f\u3060\u3057\u30a2\u30ed\u30fc\u6f14\u7b97\u5b50\u3067\u306f\u306a\u304f\u89d2\u62ec\u5f27\u3092\u4f7f\u7528\uff09<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u9023\u60f3\u914d\u5217\u306e\u4f5c\u6210\n$person = [\n    \"name\" =&gt; \"Tanaka Taro\",\n    \"age\" =&gt; 28,\n    \"email\" =&gt; \"tanaka@example.com\",\n    \"active\" =&gt; true\n];\n\n\/\/ \u30ad\u30fc\u3092\u4f7f\u3063\u305f\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $person[\"name\"]; \/\/ \"Tanaka Taro\" \u3092\u51fa\u529b\n\n\/\/ \u65b0\u3057\u3044\u8981\u7d20\u306e\u8ffd\u52a0\n$person[\"phone\"] = \"090-1234-5678\";\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\nforeach ($person as $key =&gt; $value) {\n    echo \"{$key}: \";\n    \n    \/\/ \u5024\u306e\u578b\u306b\u5fdc\u3058\u305f\u51fa\u529b\n    if (is_bool($value)) {\n        echo $value ? \"Yes\" : \"No\";\n    } else {\n        echo $value;\n    }\n    echo \"\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">\u6d3b\u7528\u30b7\u30fc\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u540d\u524d\u4ed8\u304d\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u3064\u30c7\u30fc\u30bf<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30e6\u30fc\u30b6\u30fc\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u30aa\u30d7\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30ad\u30fc\u3068\u5024\u306e\u30de\u30c3\u30d4\u30f3\u30b0<\/strong><ul><li>\u56fd\u30b3\u30fc\u30c9\u3068\u56fd\u540d<\/li><li>\u88fd\u54c1ID\u3068\u4fa1\u683c<\/li><li>\u8a00\u8a9e\u30b3\u30fc\u30c9\u3068\u7ffb\u8a33\u30c6\u30ad\u30b9\u30c8<\/li><\/ul><code>$country_codes = [ \"JP\" =&gt; \"Japan\", \"US\" =&gt; \"United States\", \"UK\" =&gt; \"United Kingdom\", \"FR\" =&gt; \"France\" ]; echo \"Country code JP is for: \" . $country_codes[\"JP\"]; \/\/ \"Japan\" \u3092\u51fa\u529b<\/code><\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u306e\u691c\u7d22\u3068\u53c2\u7167<\/strong><ul><li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0<\/li><li>\u9ad8\u901f\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb<\/li><\/ul><code>$prices = [ \"apple\" =&gt; 150, \"banana\" =&gt; 100, \"orange\" =&gt; 120 ]; $fruit = \"banana\"; echo \"The price of {$fruit} is {$prices[$fruit]} yen\";<\/code><\/li>\n\n\n\n<li><strong>JSON\u3068\u306e\u76f8\u4e92\u5909\u63db<\/strong><ul><li>API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u51e6\u7406<\/li><li>\u69cb\u9020\u5316\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u3068\u53d6\u5f97<\/li><\/ul><code>$person = [ \"name\" =&gt; \"Tanaka\", \"skills\" =&gt; [\"PHP\", \"JavaScript\", \"MySQL\"] ]; \/\/ PHP\u306e\u9023\u60f3\u914d\u5217\u3092JSON\u306b\u5909\u63db $json = json_encode($person); echo $json; \/\/ {\"name\":\"Tanaka\",\"skills\":[\"PHP\",\"JavaScript\",\"MySQL\"]} \/\/ JSON\u3092PHP\u306e\u9023\u60f3\u914d\u5217\u306b\u623b\u3059 $decoded = json_decode($json, true); echo $decoded[\"name\"]; \/\/ \"Tanaka\" \u3092\u51fa\u529b<\/code><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u591a\u6b21\u5143\u914d\u5217\u306e\u69cb\u9020\u3068\u7406\u89e3<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\u5225\u306e\u914d\u5217\u3092\u6301\u3064\u69cb\u9020\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u968e\u5c64\u3092\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-32\">\u7279\u5fb4<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\u5225\u306e\u914d\u5217\u3092\u6301\u3064<\/li>\n\n\n\n<li>2\u6b21\u5143\u30013\u6b21\u5143\u3001\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\u306e\u6b21\u5143\u3092\u6301\u3064\u3053\u3068\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3084\u30c6\u30fc\u30d6\u30eb\u72b6\u306e\u30c7\u30fc\u30bf\u3092\u8868\u73fe\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u69cb\u9020\u306f\u30c7\u30d0\u30c3\u30b0\u304c\u96e3\u3057\u304f\u306a\u308b\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 2\u6b21\u5143\u914d\u5217\u306e\u4f8b\uff08\u884c\u5217\/\u30c6\u30fc\u30d6\u30eb\uff09\n$grades = [\n    [\"Math\", 85, 90, 78],\n    [\"English\", 92, 88, 76],\n    [\"Science\", 78, 84, 90]\n];\n\n\/\/ \u7279\u5b9a\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $grades[1][2]; \/\/ 88 \u3092\u51fa\u529b\uff08English\u79d1\u76ee\u306e3\u756a\u76ee\u306e\u70b9\u6570\uff09\n\n\/\/ \u5225\u306e\u5f62\u5f0f\u306e2\u6b21\u5143\u914d\u5217\n$students = [\n    \"Tanaka\" =&gt; [\n        \"math\" =&gt; 85,\n        \"english\" =&gt; 92,\n        \"science\" =&gt; 78\n    ],\n    \"Suzuki\" =&gt; [\n        \"math\" =&gt; 90,\n        \"english\" =&gt; 88,\n        \"science\" =&gt; 84\n    ]\n];\n\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u9023\u60f3\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $students[\"Suzuki\"][\"english\"]; \/\/ 88 \u3092\u51fa\u529b\n\n\/\/ 3\u6b21\u5143\u914d\u5217\u306e\u4f8b\n$school_data = [\n    \"Class A\" =&gt; [\n        \"Tanaka\" =&gt; [\n            \"math\" =&gt; 85,\n            \"english\" =&gt; 92\n        ],\n        \"Suzuki\" =&gt; [\n            \"math\" =&gt; 90,\n            \"english\" =&gt; 88\n        ]\n    ],\n    \"Class B\" =&gt; [\n        \"Yamada\" =&gt; [\n            \"math\" =&gt; 78,\n            \"english\" =&gt; 86\n        ]\n    ]\n];\n\n\/\/ 3\u6b21\u5143\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $school_data[\"Class A\"][\"Tanaka\"][\"math\"]; \/\/ 85 \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">\u591a\u6b21\u5143\u914d\u5217\u306e\u6d3b\u7528\u30b7\u30fc\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c6\u30fc\u30d6\u30eb\u72b6\u306e\u30c7\u30fc\u30bf<\/strong><ul><li>\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf<\/li><li>\u884c\u3068\u5217\u306e\u69cb\u9020\u3092\u6301\u3064\u60c5\u5831<\/li><\/ul><code>\/\/ \u58f2\u4e0a\u30c7\u30fc\u30bf\u306e\u4f8b $sales_data = [ [\"2023-01\", \"\u6771\u4eac\", 1200000], [\"2023-01\", \"\u5927\u962a\", 850000], [\"2023-02\", \"\u6771\u4eac\", 1300000], [\"2023-02\", \"\u5927\u962a\", 900000] ];<\/code><\/li>\n\n\n\n<li><strong>\u968e\u5c64\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020<\/strong><ul><li>\u30e1\u30cb\u30e5\u30fc\u3068\u30b5\u30d6\u30e1\u30cb\u30e5\u30fc<\/li><li>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u3088\u3046\u306a\u30c4\u30ea\u30fc\u69cb\u9020<\/li><\/ul><code>$menu = [ \"\u30db\u30fc\u30e0\" =&gt; [], \"\u88fd\u54c1\" =&gt; [ \"\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\" =&gt; [ \"\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\", \"\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u30a2\u30d7\u30ea\", \"\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\" ], \"\u30b5\u30fc\u30d3\u30b9\" =&gt; [ \"\u30b3\u30f3\u30b5\u30eb\u30c6\u30a3\u30f3\u30b0\", \"\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\" ] ], \"\u304a\u554f\u3044\u5408\u308f\u305b\" =&gt; [] ];<\/code><\/li>\n\n\n\n<li><strong>\u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306e\u96c6\u5408<\/strong><ul><li>\u30ab\u30c6\u30b4\u30ea\u5225\u306e\u88fd\u54c1\u30ea\u30b9\u30c8<\/li><li>\u5730\u57df\u5225\u306e\u9867\u5ba2\u60c5\u5831<\/li><\/ul><code>$products_by_category = [ \"\u96fb\u5b50\u6a5f\u5668\" =&gt; [ [\"id\" =&gt; 101, \"name\" =&gt; \"\u30ce\u30fc\u30c8PC\", \"price\" =&gt; 80000], [\"id\" =&gt; 102, \"name\" =&gt; \"\u30bf\u30d6\u30ec\u30c3\u30c8\", \"price\" =&gt; 50000] ], \"\u66f8\u7c4d\" =&gt; [ [\"id\" =&gt; 201, \"name\" =&gt; \"PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5165\u9580\", \"price\" =&gt; 2800], [\"id\" =&gt; 202, \"name\" =&gt; \"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\", \"price\" =&gt; 3200] ] ];<\/code><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-34\">\u914d\u5217\u306e\u7a2e\u985e\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>\u305d\u308c\u305e\u308c\u306e\u914d\u5217\u30bf\u30a4\u30d7\u306b\u306f\u9577\u6240\u3068\u77ed\u6240\u304c\u3042\u308a\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u3082\u306e\u3092\u9078\u3076\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n<div id=\"id-f7aa865f-b127-40cc-871d-47f91d781e49\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u914d\u5217\u306e\u7a2e\u985e<\/th><th>\u9577\u6240<\/th><th>\u77ed\u6240<\/th><th>\u6700\u9069\u306a\u5229\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217<\/td><td>\u30fb\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u611f\u7684&lt;br&gt;\u30fb\u9806\u5e8f\u304c\u660e\u78ba&lt;br&gt;\u30fb\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u3044<\/td><td>\u30fb\u8981\u7d20\u306e\u610f\u5473\u304c\u660e\u793a\u7684\u3067\u306a\u3044&lt;br&gt;\u30fb\u7279\u5b9a\u306e\u5024\u3092\u691c\u7d22\u3059\u308b\u306e\u306b\u6642\u9593\u304c\u304b\u304b\u308b<\/td><td>\u30fb\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u30a2\u30af\u30bb\u30b9&lt;br&gt;\u30fb\u9806\u5e8f\u4ed8\u304d\u30ea\u30b9\u30c8&lt;br&gt;\u30fb\u540c\u8cea\u306a\u30c7\u30fc\u30bf\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/td><\/tr><tr><td>\u9023\u60f3\u914d\u5217<\/td><td>\u30fb\u30c7\u30fc\u30bf\u306e\u610f\u5473\u304c\u660e\u78ba&lt;br&gt;\u30fb\u30ad\u30fc\u306b\u3088\u308b\u9ad8\u901f\u30a2\u30af\u30bb\u30b9&lt;br&gt;\u30fb\u81ea\u5df1\u6587\u66f8\u5316\u7684\u306a\u30b3\u30fc\u30c9<\/td><td>\u30fb\u82e5\u5e72\u306e\u30e1\u30e2\u30ea\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9&lt;br&gt;\u30fb\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u3063\u305f\u53cd\u5fa9\u51e6\u7406\u306b\u4e0d\u5411\u304d<\/td><td>\u30fb\u30d7\u30ed\u30d1\u30c6\u30a3\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf&lt;br&gt;\u30fb\u30ad\u30fc\/\u5024\u306e\u30de\u30c3\u30d4\u30f3\u30b0&lt;br&gt;\u30fbJSON\u3068\u306e\u76f8\u4e92\u904b\u7528<\/td><\/tr><tr><td>\u591a\u6b21\u5143\u914d\u5217<\/td><td>\u30fb\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u53ef\u80fd&lt;br&gt;\u30fb\u95a2\u9023\u30c7\u30fc\u30bf\u306e\u30b0\u30eb\u30fc\u30d7\u5316<\/td><td>\u30fb\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u5834\u5408\u306e\u53ef\u8aad\u6027\u4f4e\u4e0b&lt;br&gt;\u30fb\u30c7\u30d0\u30c3\u30b0\u306e\u8907\u96d1\u3055<\/td><td>\u30fb\u968e\u5c64\u7684\u306a\u30c7\u30fc\u30bf&lt;br&gt;\u30fb\u30c6\u30fc\u30d6\u30eb\/\u30b0\u30ea\u30c3\u30c9\u30c7\u30fc\u30bf&lt;br&gt;\u30fb\u8907\u6570\u306e\u95a2\u9023\u5c5e\u6027\u3092\u6301\u3064\u9805\u76ee<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">\u914d\u5217\u9078\u629e\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u6027\u8cea\u3092\u8003\u616e\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u9806\u5e8f\u91cd\u8996\u306a\u3089\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217<\/li>\n\n\n\n<li>\u540d\u524d\u4ed8\u304d\u30d7\u30ed\u30d1\u30c6\u30a3\u306a\u3089\u3070\u9023\u60f3\u914d\u5217<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u69cb\u9020\u306a\u3089\u3070\u591a\u6b21\u5143\u914d\u5217<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u691c\u8a0e\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5168\u8981\u7d20\u3092\u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u306a\u3089\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u30ad\u30fc\u3067\u7d20\u65e9\u304f\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306a\u3089\u9023\u60f3\u914d\u5217<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u53ef\u8aad\u6027\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u3092\u91cd\u8996\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u4eba\u306b\u3068\u3063\u3066\u610f\u5473\u304c\u660e\u78ba\u306b\u306a\u308b\u69cb\u9020\u3092\u9078\u3076<\/li>\n\n\n\n<li>\u904e\u5ea6\u306b\u8907\u96d1\u306a\u30cd\u30b9\u30c8\u306f\u907f\u3051\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5c06\u6765\u306e\u62e1\u5f35\u6027\u3092\u8003\u3048\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u5909\u5316\u3059\u308b\u53ef\u80fd\u6027\u3092\u8003\u616e\u3059\u308b<\/li>\n\n\n\n<li>\u5f8c\u304b\u3089\u9805\u76ee\u3092\u8ffd\u52a0\u3057\u3084\u3059\u3044\u69cb\u9020\u3092\u9078\u3076<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u4f7f\u3044\u5206\u3051\u4f8b\n\n\/\/ 1. \u5358\u7d14\u306a\u9078\u629e\u80a2\u30ea\u30b9\u30c8 \u2192 \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$payment_methods = [\"\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\", \"\u9280\u884c\u632f\u8fbc\", \"\u4ee3\u91d1\u5f15\u63db\", \"\u96fb\u5b50\u30de\u30cd\u30fc\"];\n\n\/\/ 2. \u9805\u76ee\u3068\u305d\u306e\u5024\u306e\u30de\u30c3\u30d4\u30f3\u30b0 \u2192 \u9023\u60f3\u914d\u5217\n$product = [\n    \"id\" =&gt; \"p1001\",\n    \"name\" =&gt; \"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5165\u9580\u66f8\",\n    \"price\" =&gt; 2800,\n    \"stock\" =&gt; 120,\n    \"available\" =&gt; true\n];\n\n\/\/ 3. \u8907\u6570\u30ec\u30b3\u30fc\u30c9\u306e\u96c6\u5408 \u2192 \u591a\u6b21\u5143\u914d\u5217\uff08\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 + \u9023\u60f3\uff09\n$orders = [\n    [\n        \"order_id\" =&gt; \"A10001\",\n        \"customer\" =&gt; \"\u7530\u4e2d\u592a\u90ce\",\n        \"total\" =&gt; 9800,\n        \"items\" =&gt; [\n            [\"product_id\" =&gt; \"p1001\", \"quantity\" =&gt; 2],\n            [\"product_id\" =&gt; \"p1002\", \"quantity\" =&gt; 1]\n        ]\n    ],\n    [\n        \"order_id\" =&gt; \"A10002\",\n        \"customer\" =&gt; \"\u9234\u6728\u82b1\u5b50\",\n        \"total\" =&gt; 5600,\n        \"items\" =&gt; [\n            [\"product_id\" =&gt; \"p2001\", \"quantity\" =&gt; 1]\n        ]\n    ]\n];\n<\/pre>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u305d\u306e\u67d4\u8edf\u6027\u304b\u3089\u3001\u307b\u307c\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u8868\u73fe\u30cb\u30fc\u30ba\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u76ee\u7684\u306b\u5408\u3063\u305f\u914d\u5217\u306e\u7a2e\u985e\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306e\u6027\u8cea\u3001\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3001\u5c06\u6765\u306e\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u3066\u3001\u6700\u9069\u306a\u914d\u5217\u69cb\u9020\u3092\u8a2d\u8a08\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-36\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af1\uff1a\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664<\/h2>\n\n\n\n<p>\u914d\u5217\u306e\u57fa\u672c\u7684\u306a\u64cd\u4f5c\u3068\u3057\u3066\u6700\u3082\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u306e\u304c\u3001\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\u3067\u3059\u3002PHP\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u64cd\u4f5c\u3092\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u5c02\u7528\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u64cd\u4f5c\u3001\u305d\u3057\u3066\u7279\u5b9a\u4f4d\u7f6e\u3078\u306e\u8981\u7d20\u633f\u5165\u3068\u3044\u3063\u305f\u5b9f\u7528\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">array_push()\u3068array_pop()\u306e\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>array_push()\u3068array_pop()\u306f\u3001\u30b9\u30bf\u30c3\u30af\uff08\u5f8c\u5165\u308c\u5148\u51fa\u3057\uff1aLIFO\uff09\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3067\u3059\u3002\u914d\u5217\u306e\u672b\u5c3e\u306b\u5bfe\u3059\u308b\u64cd\u4f5c\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">array_push() \u2013 \u672b\u5c3e\u3078\u306e\u8981\u7d20\u8ffd\u52a0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_push(array &amp;$array, mixed ...$values): int\n<\/pre>\n\n\n\n<p>array_push()\u306f\u914d\u5217\u306e\u672b\u5c3e\u306b\u4e00\u3064\u307e\u305f\u306f\u8907\u6570\u306e\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u3001\u8ffd\u52a0\u5f8c\u306e\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$stack = [\"red\", \"green\"];\n\n\/\/ \u4e00\u3064\u306e\u8981\u7d20\u3092\u8ffd\u52a0\narray_push($stack, \"blue\");\nprint_r($stack); \/\/ [\"red\", \"green\", \"blue\"]\n\n\/\/ \u8907\u6570\u306e\u8981\u7d20\u3092\u4e00\u5ea6\u306b\u8ffd\u52a0\narray_push($stack, \"yellow\", \"purple\", \"orange\");\nprint_r($stack); \/\/ [\"red\", \"green\", \"blue\", \"yellow\", \"purple\", \"orange\"]\n\n\/\/ \u8fd4\u308a\u5024\u306f\u8ffd\u52a0\u5f8c\u306e\u8981\u7d20\u6570\n$count = array_push($stack, \"black\");\necho $count; \/\/ 7 \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p><strong>\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u69cb\u6587\u3068\u306e\u6bd4\u8f03\uff1a<\/strong><\/p>\n\n\n\n<p>\u5358\u4e00\u306e\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u3001array_push()\u3088\u308a\u3082 <code>$array[] = $value<\/code> \u306e\u65b9\u304c\u82e5\u5e72\u9ad8\u901f\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$stack = [\"red\", \"green\"];\n\n\/\/ array_push()\u3088\u308a\u3082\u52b9\u7387\u7684\n$stack[] = \"blue\";\n\n\/\/ \u8907\u6570\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306farray_push()\u306e\u65b9\u304c\u53ef\u8aad\u6027\u304c\u9ad8\u3044\narray_push($stack, \"yellow\", \"purple\");\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-39\">array_pop() \u2013 \u672b\u5c3e\u304b\u3089\u306e\u8981\u7d20\u524a\u9664<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_pop(array &amp;$array): mixed\n<\/pre>\n\n\n\n<p>array_pop()\u306f\u914d\u5217\u306e\u672b\u5c3e\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u3066\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u304b\u3089\u306f\u305d\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$stack = [\"red\", \"green\", \"blue\", \"yellow\"];\n\n\/\/ \u672b\u5c3e\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059\n$last = array_pop($stack);\necho $last; \/\/ \"yellow\" \u3092\u51fa\u529b\nprint_r($stack); \/\/ [\"red\", \"green\", \"blue\"]\n\n\/\/ \u7a7a\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066array_pop()\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\n$empty = [];\n$value = array_pop($empty);\nvar_dump($value); \/\/ NULL \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p><strong>\u30b9\u30bf\u30c3\u30af\u64cd\u4f5c\u306e\u5b9f\u8df5\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b9\u30bf\u30c3\u30af\u3092\u4f7f\u3063\u305f\u8a08\u7b97\u5f0f\u306e\u8a55\u4fa1\uff08\u9006\u30dd\u30fc\u30e9\u30f3\u30c9\u8a18\u6cd5\uff09\nfunction evaluateRPN($tokens) {\n    $stack = [];\n    \n    foreach ($tokens as $token) {\n        if (is_numeric($token)) {\n            array_push($stack, (int)$token);\n        } else {\n            $b = array_pop($stack);\n            $a = array_pop($stack);\n            \n            switch ($token) {\n                case '+': array_push($stack, $a + $b); break;\n                case '-': array_push($stack, $a - $b); break;\n                case '*': array_push($stack, $a * $b); break;\n                case '\/': array_push($stack, $a \/ $b); break;\n            }\n        }\n    }\n    \n    return array_pop($stack);\n}\n\n\/\/ \u4f7f\u7528\u4f8b: \"3 4 + 2 *\" = (3 + 4) * 2 = 14\n$rpn = [\"3\", \"4\", \"+\", \"2\", \"*\"];\necho evaluateRPN($rpn); \/\/ 14 \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">array_shift()\u3068array_unshift()\u306b\u3088\u308b\u30ad\u30e5\u30fc\u64cd\u4f5c<\/h3>\n\n\n\n<p>array_shift()\u3068array_unshift()\u306f\u3001\u30ad\u30e5\u30fc\uff08\u5148\u5165\u308c\u5148\u51fa\u3057\uff1aFIFO\uff09\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3067\u3059\u3002\u914d\u5217\u306e\u5148\u982d\u306b\u5bfe\u3059\u308b\u64cd\u4f5c\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">array_unshift() \u2013 \u5148\u982d\u3078\u306e\u8981\u7d20\u8ffd\u52a0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_unshift(array &amp;$array, mixed ...$values): int\n<\/pre>\n\n\n\n<p>array_unshift()\u306f\u914d\u5217\u306e\u5148\u982d\u306b\u4e00\u3064\u307e\u305f\u306f\u8907\u6570\u306e\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u3001\u8ffd\u52a0\u5f8c\u306e\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$queue = [\"green\", \"blue\"];\n\n\/\/ \u4e00\u3064\u306e\u8981\u7d20\u3092\u5148\u982d\u306b\u8ffd\u52a0\narray_unshift($queue, \"red\");\nprint_r($queue); \/\/ [\"red\", \"green\", \"blue\"]\n\n\/\/ \u8907\u6570\u306e\u8981\u7d20\u3092\u4e00\u5ea6\u306b\u5148\u982d\u306b\u8ffd\u52a0\narray_unshift($queue, \"yellow\", \"purple\");\nprint_r($queue); \/\/ [\"yellow\", \"purple\", \"red\", \"green\", \"blue\"]\n\n\/\/ \u8fd4\u308a\u5024\u306f\u8ffd\u52a0\u5f8c\u306e\u8981\u7d20\u6570\n$count = array_unshift($queue, \"orange\");\necho $count; \/\/ 6 \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">array_shift() \u2013 \u5148\u982d\u304b\u3089\u306e\u8981\u7d20\u524a\u9664<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_shift(array &amp;$array): mixed\n<\/pre>\n\n\n\n<p>array_shift()\u306f\u914d\u5217\u306e\u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\u3066\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u304b\u3089\u306f\u305d\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$queue = [\"red\", \"green\", \"blue\", \"yellow\"];\n\n\/\/ \u5148\u982d\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059\n$first = array_shift($queue);\necho $first; \/\/ \"red\" \u3092\u51fa\u529b\nprint_r($queue); \/\/ [\"green\", \"blue\", \"yellow\"]\n\n\/\/ \u7a7a\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066array_shift()\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\n$empty = [];\n$value = array_shift($empty);\nvar_dump($value); \/\/ NULL \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>array_shift()\u3068array_unshift()\u306f\u3001\u914d\u5217\u306e\u5148\u982d\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u3001\u3059\u3079\u3066\u306e\u8981\u7d20\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u518d\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5927\u304d\u306a\u914d\u5217\u306b\u5bfe\u3057\u3066\u983b\u7e41\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u4f8b\n$largeArray = range(1, 10000);\n$start = microtime(true);\n\n\/\/ array_shift()\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\nfor ($i = 0; $i &lt; 1000; $i++) {\n    array_shift($largeArray);\n}\n\n$end = microtime(true);\necho \"Time taken: \" . ($end - $start) . \" seconds\\n\";\n\/\/ \u5927\u304d\u306a\u914d\u5217\u3067\u306e\u64cd\u4f5c\u306f\u9045\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\n<\/pre>\n\n\n\n<p><strong>\u30ad\u30e5\u30fc\u64cd\u4f5c\u306e\u5b9f\u8df5\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ad\u30e5\u30fc\u3092\u4f7f\u3063\u305f\u5e45\u512a\u5148\u63a2\u7d22\uff08BFS\uff09\u306e\u5b9f\u88c5\nfunction breadthFirstSearch($graph, $start) {\n    $queue = [$start];\n    $visited = [$start =&gt; true];\n    $result = [];\n    \n    while (count($queue) &gt; 0) {\n        $node = array_shift($queue);\n        $result[] = $node;\n        \n        foreach ($graph[$node] as $neighbor) {\n            if (!isset($visited[$neighbor])) {\n                $visited[$neighbor] = true;\n                array_push($queue, $neighbor);\n            }\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$graph = [\n    'A' =&gt; ['B', 'C'],\n    'B' =&gt; ['A', 'D', 'E'],\n    'C' =&gt; ['A', 'F'],\n    'D' =&gt; ['B'],\n    'E' =&gt; ['B', 'F'],\n    'F' =&gt; ['C', 'E']\n];\n\n$traversal = breadthFirstSearch($graph, 'A');\necho implode(' -&gt; ', $traversal); \/\/ \u5e45\u512a\u5148\u63a2\u7d22\u306e\u9806\u756a\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-43\">\u7279\u5b9a\u306e\u4f4d\u7f6e\u3078\u306e\u8981\u7d20\u306e\u633f\u5165\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u4efb\u610f\u306e\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\u3059\u308b\u306b\u306f\u3001array_splice()\u95a2\u6570\u304c\u6700\u9069\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001\u6307\u5b9a\u3057\u305f\u4f4d\u7f6e\u304b\u3089\u6307\u5b9a\u3057\u305f\u6570\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u65b0\u3057\u3044\u8981\u7d20\u3092\u633f\u5165\u3067\u304d\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">array_splice() \u2013 \u914d\u5217\u306e\u4e00\u90e8\u3092\u7f6e\u63db\u30fb\u524a\u9664\u30fb\u633f\u5165<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_splice(array &amp;$array, int $offset, ?int $length = null, mixed $replacement = []): array\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>$array<\/code>: \u5bfe\u8c61\u306e\u914d\u5217\uff08\u53c2\u7167\u6e21\u3057\uff09<\/li>\n\n\n\n<li><code>$offset<\/code>: \u5909\u66f4\u3092\u958b\u59cb\u3059\u308b\u4f4d\u7f6e\uff08\u8ca0\u306e\u5024\u306f\u672b\u5c3e\u304b\u3089\u306e\u30ab\u30a6\u30f3\u30c8\uff09<\/li>\n\n\n\n<li><code>$length<\/code>: \u524a\u9664\u3059\u308b\u8981\u7d20\u6570\uff08null\u306e\u5834\u5408\u306f$offset\u4ee5\u964d\u3059\u3079\u3066\uff09<\/li>\n\n\n\n<li><code>$replacement<\/code>: \u633f\u5165\u3059\u308b\u8981\u7d20\uff08\u914d\u5217\u307e\u305f\u306f\u5024\uff09<\/li>\n<\/ul>\n\n\n\n<p>array_splice()\u306f\u524a\u9664\u3055\u308c\u305f\u8981\u7d20\u3092\u914d\u5217\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">1. \u8981\u7d20\u306e\u633f\u5165\uff08\u524a\u9664\u306a\u3057\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b92\u306e\u4f4d\u7f6e\u306b\u8981\u7d20\u3092\u633f\u5165\narray_splice($fruits, 2, 0, \"kiwi\");\nprint_r($fruits); \/\/ [\"apple\", \"banana\", \"kiwi\", \"orange\", \"grape\"]\n\n\/\/ \u8907\u6570\u306e\u8981\u7d20\u3092\u633f\u5165\narray_splice($fruits, 3, 0, [\"melon\", \"peach\"]);\nprint_r($fruits); \/\/ [\"apple\", \"banana\", \"kiwi\", \"melon\", \"peach\", \"orange\", \"grape\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">2. \u8981\u7d20\u306e\u7f6e\u63db<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\n\n\/\/ 1\u3064\u306e\u8981\u7d20\u3092\u7f6e\u63db\narray_splice($fruits, 1, 1, \"kiwi\");\nprint_r($fruits); \/\/ [\"apple\", \"kiwi\", \"orange\", \"grape\"]\n\n\/\/ \u8907\u6570\u306e\u8981\u7d20\u3092\u7f6e\u63db\narray_splice($fruits, 1, 2, [\"melon\", \"peach\", \"lemon\"]);\nprint_r($fruits); \/\/ [\"apple\", \"melon\", \"peach\", \"lemon\", \"grape\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">3. \u8981\u7d20\u306e\u524a\u9664<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\", \"kiwi\"];\n\n\/\/ 1\u3064\u306e\u8981\u7d20\u3092\u524a\u9664\n$removed = array_splice($fruits, 2, 1);\nprint_r($fruits); \/\/ [\"apple\", \"banana\", \"grape\", \"kiwi\"]\nprint_r($removed); \/\/ [\"orange\"]\n\n\/\/ \u8907\u6570\u306e\u8981\u7d20\u3092\u524a\u9664\n$removed = array_splice($fruits, 1, 2);\nprint_r($fruits); \/\/ [\"apple\", \"kiwi\"]\nprint_r($removed); \/\/ [\"banana\", \"grape\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-48\">4. \u8ca0\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u4f7f\u3063\u305f\u64cd\u4f5c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\", \"kiwi\"];\n\n\/\/ \u672b\u5c3e\u304b\u30892\u756a\u76ee\u306e\u4f4d\u7f6e\u306b\u633f\u5165\narray_splice($fruits, -2, 0, \"melon\");\nprint_r($fruits); \/\/ [\"apple\", \"banana\", \"orange\", \"melon\", \"grape\", \"kiwi\"]\n\n\/\/ \u672b\u5c3e\u306e\u8981\u7d20\u3092\u7f6e\u63db\narray_splice($fruits, -1, 1, \"peach\");\nprint_r($fruits); \/\/ [\"apple\", \"banana\", \"orange\", \"melon\", \"grape\", \"peach\"]\n<\/pre>\n\n\n\n<p><strong>\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u914d\u5217\u306e\u4e2d\u9593\u306b\u5225\u306e\u914d\u5217\u3092\u633f\u5165<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$main_list = [\"Item 1\", \"Item 2\", \"Item 5\", \"Item 6\"];\n$sub_list = [\"Item 3\", \"Item 4\"];\n\n\/\/ Item 2\u3068Item 5\u306e\u9593\u306bsub_list\u3092\u633f\u5165\narray_splice($main_list, 2, 0, $sub_list);\nprint_r($main_list); \/\/ [\"Item 1\", \"Item 2\", \"Item 3\", \"Item 4\", \"Item 5\", \"Item 6\"]\n<\/pre>\n\n\n\n<p><strong>\u9023\u60f3\u914d\u5217\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/strong><\/p>\n\n\n\n<p>array_splice()\u306f\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u3001\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u306f\u4fdd\u6301\u3055\u308c\u307e\u305b\u3093\u3002\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u3092\u7dad\u6301\u3057\u305f\u3044\u5834\u5408\u306f\u3001array_slice()\u3068array_merge()\u3001\u307e\u305f\u306f\u624b\u52d5\u3067\u306e\u64cd\u4f5c\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$assoc_array = [\n    \"first\" =&gt; \"apple\",\n    \"second\" =&gt; \"banana\",\n    \"third\" =&gt; \"orange\"\n];\n\n\/\/ \u3053\u306e\u3088\u3046\u306aarray_splice()\u306e\u4f7f\u7528\u306f\u3001\u9023\u60f3\u30ad\u30fc\u3092\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u5909\u63db\u3057\u3066\u3057\u307e\u3046\narray_splice($assoc_array, 1, 1, [\"new\" =&gt; \"kiwi\"]);\nprint_r($assoc_array); \/\/ [0 =&gt; \"apple\", \"new\" =&gt; \"kiwi\", 1 =&gt; \"orange\"]\n\n\/\/ \u9023\u60f3\u30ad\u30fc\u3092\u7dad\u6301\u3059\u308b\u65b9\u6cd5\n$assoc_array = [\n    \"first\" =&gt; \"apple\",\n    \"second\" =&gt; \"banana\",\n    \"third\" =&gt; \"orange\"\n];\n\n\/\/ \u30ad\u30fc\u3092\u4fdd\u6301\u3057\u3066\u7279\u5b9a\u4f4d\u7f6e\u306e\u8981\u7d20\u3092\u5909\u66f4\u3059\u308b\u65b9\u6cd5\n$keys = array_keys($assoc_array);\n$values = array_values($assoc_array);\narray_splice($values, 1, 1, \"kiwi\");\n$result = array_combine($keys, $values);\nprint_r($result); \/\/ [\"first\" =&gt; \"apple\", \"second\" =&gt; \"kiwi\", \"third\" =&gt; \"orange\"]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-49\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u914d\u5217\u64cd\u4f5c\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3092\u884c\u3046\u969b\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n<div id=\"id-34edd6c9-38b5-42ba-b76b-4f384f1336b7\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u6642\u9593\u8907\u96d1\u5ea6<\/th><th>\u5927\u304d\u306a\u914d\u5217\u3067\u306e\u52b9\u7387<\/th><th>\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>array_push()<\/td><td>O(1)<\/td><td>\u975e\u5e38\u306b\u52b9\u7387\u7684<\/td><td>\u914d\u5217\u672b\u5c3e\u3078\u306e\u8ffd\u52a0<\/td><\/tr><tr><td>$array[] = $value<\/td><td>O(1)<\/td><td>\u6700\u3082\u52b9\u7387\u7684<\/td><td>\u5358\u4e00\u8981\u7d20\u3092\u672b\u5c3e\u306b\u8ffd\u52a0<\/td><\/tr><tr><td>array_pop()<\/td><td>O(1)<\/td><td>\u975e\u5e38\u306b\u52b9\u7387\u7684<\/td><td>\u914d\u5217\u672b\u5c3e\u304b\u3089\u306e\u524a\u9664<\/td><\/tr><tr><td>array_unshift()<\/td><td>O(n)<\/td><td>\u975e\u52b9\u7387\u7684<\/td><td>\u914d\u5217\u5148\u982d\u3078\u306e\u8ffd\u52a0\uff08\u5c0f\u3055\u306a\u914d\u5217\u306e\u307f\uff09<\/td><\/tr><tr><td>array_shift()<\/td><td>O(n)<\/td><td>\u975e\u52b9\u7387\u7684<\/td><td>\u914d\u5217\u5148\u982d\u304b\u3089\u306e\u524a\u9664\uff08\u5c0f\u3055\u306a\u914d\u5217\u306e\u307f\uff09<\/td><\/tr><tr><td>array_splice()<\/td><td>O(n)<\/td><td>\u4e2d\u7a0b\u5ea6<\/td><td>\u914d\u5217\u306e\u4e2d\u9593\u90e8\u5206\u306e\u64cd\u4f5c<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306f\u3001array_shift()\u3068array_unshift()\u306e\u4f7f\u7528\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u4ee3\u308f\u308a\u306bSplQueue\uff08PHP\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30ad\u30e5\u30fc\u5b9f\u88c5\uff09\u3084\u3001\u672b\u5c3e\u64cd\u4f5c\u3092\u4e2d\u5fc3\u3068\u3057\u305f\u8a2d\u8a08\u3092\u691c\u8a0e\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ SplQueue\u306e\u4f8b\n$queue = new SplQueue();\n$queue-&gt;enqueue(\"first\");\n$queue-&gt;enqueue(\"second\");\necho $queue-&gt;dequeue(); \/\/ \"first\" \u3092\u51fa\u529b\necho $queue-&gt;dequeue(); \/\/ \"second\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<p>\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\u306f\u3001\u914d\u5217\u64cd\u4f5c\u306e\u57fa\u672c\u4e2d\u306e\u57fa\u672c\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u95a2\u6570\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u304b\u3064\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u8907\u6570\u306e\u914d\u5217\u3092\u6271\u3046\u6642\u306b\u4fbf\u5229\u306a\u7d50\u5408\u3068\u5206\u5272\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-50\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af2\uff1a\u914d\u5217\u306e\u7d50\u5408\u3068\u5206\u5272<\/h2>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u3092\u7d50\u5408\u3057\u305f\u308a\u3001\u4e00\u3064\u306e\u914d\u5217\u3092\u5206\u5272\u3057\u305f\u308a\u3059\u308b\u64cd\u4f5c\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u57fa\u672c\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002PHP\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u64cd\u4f5c\u3092\u69d8\u3005\u306a\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-51\">array_merge()\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u7d50\u5408<\/h3>\n\n\n\n<p>array_merge()\u95a2\u6570\u306f\u3001\u8907\u6570\u306e\u914d\u5217\u3092\u9806\u756a\u306b\u7d50\u5408\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_merge(array ...$arrays): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-52\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits1 = [\"apple\", \"banana\"];\n$fruits2 = [\"orange\", \"grape\"];\n$allFruits = array_merge($fruits1, $fruits2);\nprint_r($allFruits); \/\/ [\"apple\", \"banana\", \"orange\", \"grape\"]\n\n\/\/ 3\u3064\u4ee5\u4e0a\u306e\u914d\u5217\u3082\u7d50\u5408\u53ef\u80fd\n$fruits3 = [\"kiwi\", \"melon\"];\n$allFruits = array_merge($fruits1, $fruits2, $fruits3);\nprint_r($allFruits); \/\/ [\"apple\", \"banana\", \"orange\", \"grape\", \"kiwi\", \"melon\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u9023\u60f3\u914d\u5217\u306e\u7d50\u5408<\/h4>\n\n\n\n<p>\u9023\u60f3\u914d\u5217\uff08\u6587\u5b57\u5217\u30ad\u30fc\uff09\u3092\u7d50\u5408\u3059\u308b\u5834\u5408\u3001\u540c\u3058\u30ad\u30fc\u3092\u6301\u3064\u8981\u7d20\u306f\u5f8c\u306e\u914d\u5217\u306e\u5024\u3067\u4e0a\u66f8\u304d\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$person1 = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n];\n\n$person2 = [\n    \"job\" =&gt; \"Developer\",\n    \"age\" =&gt; 32, \/\/ \u3053\u308c\u304c\u4e0a\u66f8\u304d\u3059\u308b\n    \"country\" =&gt; \"USA\"\n];\n\n$mergedPerson = array_merge($person1, $person2);\nprint_r($mergedPerson);\n\/*\n[\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 32,       \/\/ $person2\u306e\u5024\u3067\u4e0a\u66f8\u304d\u3055\u308c\u305f\n    \"city\" =&gt; \"New York\",\n    \"job\" =&gt; \"Developer\",\n    \"country\" =&gt; \"USA\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-54\">\u6570\u5024\u30ad\u30fc\u306e\u6271\u3044<\/h4>\n\n\n\n<p>\u6570\u5024\u30ad\u30fc\u306e\u5834\u5408\u306f\u4e0a\u66f8\u304d\u3067\u306f\u306a\u304f\u3001\u30ad\u30fc\u304c\u632f\u308a\u76f4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array1 = [1 =&gt; \"one\", 2 =&gt; \"two\"];\n$array2 = [3 =&gt; \"three\", 4 =&gt; \"four\"];\n$merged = array_merge($array1, $array2);\nprint_r($merged);\n\/*\n[\n    0 =&gt; \"one\",\n    1 =&gt; \"two\",\n    2 =&gt; \"three\",\n    3 =&gt; \"four\"\n]\n*\/\n\/\/ \u6570\u5024\u30ad\u30fc\u306f0\u304b\u3089\u632f\u308a\u76f4\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-55\">\u6df7\u5408\u914d\u5217\u306e\u7d50\u5408<\/h4>\n\n\n\n<p>\u6570\u5024\u30ad\u30fc\u3068\u6587\u5b57\u5217\u30ad\u30fc\u304c\u6df7\u5728\u3059\u308b\u5834\u5408\u3001\u305d\u308c\u305e\u308c\u306e\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array1 = [\"a\" =&gt; \"apple\", 0 =&gt; \"banana\"];\n$array2 = [\"a\" =&gt; \"apricot\", 1 =&gt; \"blueberry\"];\n$merged = array_merge($array1, $array2);\nprint_r($merged);\n\/*\n[\n    \"a\" =&gt; \"apricot\",  \/\/ \u6587\u5b57\u5217\u30ad\u30fc\u306f\u4e0a\u66f8\u304d\n    0 =&gt; \"banana\",     \/\/ \u6570\u5024\u30ad\u30fc\u306f\u7dad\u6301\u3055\u308c\u308b\u304c\n    1 =&gt; \"blueberry\"   \/\/ \u9023\u756a\u306b\u306a\u308b\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-56\">PHP 7.4\u4ee5\u964d\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50<\/h4>\n\n\n\n<p>PHP 7.4\u4ee5\u964d\u3067\u306f\u3001\u914d\u5217\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50 (<code>...<\/code>) \u3092\u4f7f\u3063\u3066\u3001\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b\u914d\u5217\u3092\u7d50\u5408\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits1 = [\"apple\", \"banana\"];\n$fruits2 = [\"orange\", \"grape\"];\n\n\/\/ array_merge()\u3068\u540c\u7b49\u306e\u64cd\u4f5c\n$allFruits = [...$fruits1, ...$fruits2];\nprint_r($allFruits); \/\/ [\"apple\", \"banana\", \"orange\", \"grape\"]\n\n\/\/ \u914d\u5217\u3068\u500b\u5225\u306e\u8981\u7d20\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u3082\u53ef\u80fd\n$specialFruits = [\"kiwi\", ...$fruits1, \"melon\", ...$fruits2];\nprint_r($specialFruits); \/\/ [\"kiwi\", \"apple\", \"banana\", \"melon\", \"orange\", \"grape\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-57\">array_merge()\u3068+\u6f14\u7b97\u5b50\u306e\u9055\u3044<\/h4>\n\n\n\n<p>PHP\u3067\u306f<code>+<\/code>\u6f14\u7b97\u5b50\u3067\u3082\u914d\u5217\u3092\u7d50\u5408\u3067\u304d\u307e\u3059\u304c\u3001\u52d5\u4f5c\u304carray_merge()\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002<code>+<\/code>\u6f14\u7b97\u5b50\u306f\u5de6\u5074\u306e\u914d\u5217\u306b\u306a\u3044\u8981\u7d20\u306e\u307f\u3092\u53f3\u5074\u304b\u3089\u8ffd\u52a0\u3057\u307e\u3059\uff08\u5de6\u5074\u512a\u5148\uff09\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array1 = [\"a\" =&gt; \"apple\", \"b\" =&gt; \"banana\"];\n$array2 = [\"a\" =&gt; \"apricot\", \"c\" =&gt; \"cherry\"];\n\n\/\/ array_merge()\u306e\u5834\u5408\uff08\u53f3\u5074\u512a\u5148\uff09\n$merged1 = array_merge($array1, $array2);\nprint_r($merged1);\n\/*\n[\n    \"a\" =&gt; \"apricot\",  \/\/ \u4e0a\u66f8\u304d\u3055\u308c\u305f\n    \"b\" =&gt; \"banana\",\n    \"c\" =&gt; \"cherry\"\n]\n*\/\n\n\/\/ +\u6f14\u7b97\u5b50\u306e\u5834\u5408\uff08\u5de6\u5074\u512a\u5148\uff09\n$merged2 = $array1 + $array2;\nprint_r($merged2);\n\/*\n[\n    \"a\" =&gt; \"apple\",    \/\/ \u4fdd\u6301\u3055\u308c\u305f\n    \"b\" =&gt; \"banana\",\n    \"c\" =&gt; \"cherry\"\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-58\">array_combine()\u306b\u3088\u308b\u30ad\u30fc\u3068\u5024\u306e\u914d\u5217\u7d50\u5408<\/h3>\n\n\n\n<p>array_combine()\u95a2\u6570\u306f\u30011\u3064\u76ee\u306e\u914d\u5217\u306e\u5024\u3092\u30ad\u30fc\u3068\u3057\u3066\u30012\u3064\u76ee\u306e\u914d\u5217\u306e\u5024\u3092\u5024\u3068\u3057\u3066\u4f7f\u7528\u3057\u3001\u65b0\u3057\u3044\u9023\u60f3\u914d\u5217\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_combine(array $keys, array $values): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-59\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$keys = [\"name\", \"age\", \"city\"];\n$values = [\"John\", 30, \"New York\"];\n\n$person = array_combine($keys, $values);\nprint_r($person);\n\/*\n[\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-60\">\u8981\u7d20\u6570\u306e\u5236\u7d04<\/h4>\n\n\n\n<p>array_combine()\u306f\u3001\u30ad\u30fc\u914d\u5217\u3068\u5024\u914d\u5217\u306e\u8981\u7d20\u6570\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u81f4\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001PHP\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u30a8\u30e9\u30fc\u307e\u305f\u306f\u8b66\u544a\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$keys = [\"name\", \"age\"];\n$values = [\"John\", 30, \"New York\"];\n\n\/\/ PHP 7.4\u4ee5\u524d: Warning\u3001PHP 8.0\u4ee5\u964d: TypeError\n$person = array_combine($keys, $values);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-61\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u6574\u5f62<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u30ab\u30e9\u30e0\u540d\u3068\u5024\n$columns = [\"id\", \"name\", \"email\"];\n$row = [1001, \"Jane Smith\", \"jane@example.com\"];\n\n\/\/ \u9023\u60f3\u914d\u5217\u306b\u5909\u63db\n$user = array_combine($columns, $row);\nprint_r($user);\n\/*\n[\n    \"id\" =&gt; 1001,\n    \"name\" =&gt; \"Jane Smith\",\n    \"email\" =&gt; \"jane@example.com\"\n]\n*\/\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u8907\u6570\u914d\u5217\u304b\u3089\u306e\u8f9e\u66f8\u4f5c\u6210<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u56fd\u30b3\u30fc\u30c9\u3068\u56fd\u540d\n$countryCodes = [\"JP\", \"US\", \"UK\", \"FR\", \"DE\"];\n$countryNames = [\"Japan\", \"United States\", \"United Kingdom\", \"France\", \"Germany\"];\n\n\/\/ \u56fd\u30b3\u30fc\u30c9\u3092\u30ad\u30fc\u3068\u3057\u305f\u8f9e\u66f8\u3092\u4f5c\u6210\n$countries = array_combine($countryCodes, $countryNames);\necho $countries[\"JP\"]; \/\/ \"Japan\" \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u30d5\u30ea\u30c3\u30d7\u3068\u518d\u30ad\u30fc\u4ed8\u3051<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [1 =&gt; \"apple\", 2 =&gt; \"banana\", 3 =&gt; \"cherry\"];\n$keys = [\"fruit1\", \"fruit2\", \"fruit3\"];\n\n\/\/ \u6570\u5024\u30ad\u30fc\u3092\u6587\u5b57\u5217\u30ad\u30fc\u306b\u5909\u63db\n$renamed = array_combine($keys, array_values($data));\nprint_r($renamed);\n\/*\n[\n    \"fruit1\" =&gt; \"apple\",\n    \"fruit2\" =&gt; \"banana\",\n    \"fruit3\" =&gt; \"cherry\"\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-62\">array_slice()\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u90e8\u5206\u53d6\u5f97<\/h3>\n\n\n\n<p>array_slice()\u95a2\u6570\u306f\u3001\u914d\u5217\u306e\u4e00\u90e8\u3092\u6307\u5b9a\u3055\u308c\u305f\u7bc4\u56f2\u3067\u5207\u308a\u51fa\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_slice(array $array, int $offset, ?int $length = null, bool $preserve_keys = false): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-63\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"cherry\", \"date\", \"elderberry\", \"fig\"];\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b92\u304b\u30892\u8981\u7d20\u3092\u53d6\u5f97\n$slice1 = array_slice($fruits, 2, 2);\nprint_r($slice1); \/\/ [\"cherry\", \"date\"]\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b93\u304b\u3089\u6700\u5f8c\u307e\u3067\u3092\u53d6\u5f97\n$slice2 = array_slice($fruits, 3);\nprint_r($slice2); \/\/ [\"date\", \"elderberry\", \"fig\"]\n\n\/\/ \u8ca0\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\uff08\u672b\u5c3e\u304b\u3089\u6570\u3048\u308b\uff09\n$slice3 = array_slice($fruits, -3);\nprint_r($slice3); \/\/ [\"date\", \"elderberry\", \"fig\"]\n\n\/\/ \u8ca0\u306e\u9577\u3055\u3092\u4f7f\u7528\uff08\u672b\u5c3e\u304b\u3089\u6570\u8981\u7d20\u3092\u9664\u304f\uff09\n$slice4 = array_slice($fruits, 1, -2);\nprint_r($slice4); \/\/ [\"banana\", \"cherry\", \"date\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-64\">\u30ad\u30fc\u306e\u4fdd\u6301<\/h4>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001array_slice()\u306f\u6570\u5024\u30ad\u30fc\u30920\u304b\u3089\u632f\u308a\u76f4\u3057\u307e\u3059\u3002\u7b2c4\u5f15\u6570\u3092<code>true<\/code>\u306b\u3059\u308b\u3068\u3001\u5143\u306e\u30ad\u30fc\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$assoc = [\"a\" =&gt; \"apple\", \"b\" =&gt; \"banana\", 5 =&gt; \"cherry\", 6 =&gt; \"date\"];\n\n\/\/ \u30ad\u30fc\u3092\u4fdd\u6301\u3057\u306a\u3044\u5834\u5408\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\n$slice1 = array_slice($assoc, 1, 2);\nprint_r($slice1);\n\/*\n[\n    0 =&gt; \"banana\",\n    1 =&gt; \"cherry\"\n]\n*\/\n\n\/\/ \u30ad\u30fc\u3092\u4fdd\u6301\u3059\u308b\u5834\u5408\n$slice2 = array_slice($assoc, 1, 2, true);\nprint_r($slice2);\n\/*\n[\n    \"b\" =&gt; \"banana\",\n    5 =&gt; \"cherry\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-65\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$items = [\"Item 1\", \"Item 2\", \"Item 3\", \"Item 4\", \"Item 5\", \"Item 6\", \"Item 7\", \"Item 8\", \"Item 9\", \"Item 10\"];\n$page = 2;  \/\/ 2\u30da\u30fc\u30b8\u76ee\n$perPage = 3;  \/\/ 1\u30da\u30fc\u30b8\u3042\u305f\u308a3\u30a2\u30a4\u30c6\u30e0\n\n$offset = ($page - 1) * $perPage;\n$currentPageItems = array_slice($items, $offset, $perPage);\nprint_r($currentPageItems);\n\/*\n[\n    0 =&gt; \"Item 4\",\n    1 =&gt; \"Item 5\",\n    2 =&gt; \"Item 6\"\n]\n*\/\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u5148\u982d\u307e\u305f\u306f\u672b\u5c3e\u306e\u9664\u5916<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [null, \"Header\", \"Content 1\", \"Content 2\", \"Content 3\", \"Footer\", null];\n\n\/\/ \u5148\u982d\u3068\u672b\u5c3e\u306enull\u3092\u9664\u53bb\n$cleanedData = array_slice($data, 1, -1);\nprint_r($cleanedData);\n\/*\n[\n    0 =&gt; \"Header\",\n    1 =&gt; \"Content 1\",\n    2 =&gt; \"Content 2\",\n    3 =&gt; \"Content 3\",\n    4 =&gt; \"Footer\"\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-66\">array_chunk()\u306b\u3088\u308b\u914d\u5217\u306e\u5206\u5272<\/h3>\n\n\n\n<p>array_chunk()\u95a2\u6570\u306f\u3001\u914d\u5217\u3092\u6307\u5b9a\u3057\u305f\u8981\u7d20\u6570\u3054\u3068\u306e\u30c1\u30e3\u30f3\u30af\uff08\u584a\uff09\u306b\u5206\u5272\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_chunk(array $array, int $length, bool $preserve_keys = false): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-67\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];\n\n\/\/ 3\u8981\u7d20\u305a\u3064\u306b\u5206\u5272\n$chunks = array_chunk($numbers, 3);\nprint_r($chunks);\n\/*\n[\n    0 =&gt; [0 =&gt; 1, 1 =&gt; 2, 2 =&gt; 3],\n    1 =&gt; [0 =&gt; 4, 1 =&gt; 5, 2 =&gt; 6],\n    2 =&gt; [0 =&gt; 7, 1 =&gt; 8, 2 =&gt; 9],\n    3 =&gt; [0 =&gt; 10]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-68\">\u30ad\u30fc\u306e\u4fdd\u6301<\/h4>\n\n\n\n<p>\u7b2c3\u5f15\u6570\u3092<code>true<\/code>\u306b\u3059\u308b\u3068\u3001\u5143\u306e\u30ad\u30fc\u304c\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$assoc = [\"a\" =&gt; 1, \"b\" =&gt; 2, \"c\" =&gt; 3, \"d\" =&gt; 4, \"e\" =&gt; 5];\n\n\/\/ \u30ad\u30fc\u3092\u4fdd\u6301\u3057\u306a\u3044\u5834\u5408\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\n$chunks1 = array_chunk($assoc, 2);\nprint_r($chunks1);\n\/*\n[\n    0 =&gt; [0 =&gt; 1, 1 =&gt; 2],\n    1 =&gt; [0 =&gt; 3, 1 =&gt; 4],\n    2 =&gt; [0 =&gt; 5]\n]\n*\/\n\n\/\/ \u30ad\u30fc\u3092\u4fdd\u6301\u3059\u308b\u5834\u5408\n$chunks2 = array_chunk($assoc, 2, true);\nprint_r($chunks2);\n\/*\n[\n    0 =&gt; [\"a\" =&gt; 1, \"b\" =&gt; 2],\n    1 =&gt; [\"c\" =&gt; 3, \"d\" =&gt; 4],\n    2 =&gt; [\"e\" =&gt; 5]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-69\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30c1\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$items = [\"Item1\", \"Item2\", \"Item3\", \"Item4\", \"Item5\", \"Item6\", \"Item7\"];\n$batchSize = 3;\n\n\/\/ \u30d0\u30c3\u30c1\u5358\u4f4d\u3067\u51e6\u7406\n$batches = array_chunk($items, $batchSize);\nforeach ($batches as $batchIndex =&gt; $batch) {\n    echo \"Processing batch \" . ($batchIndex + 1) . \":\\n\";\n    foreach ($batch as $item) {\n        echo \"- Processing $item\\n\";\n        \/\/ \u5404\u9805\u76ee\u306e\u51e6\u7406...\n    }\n    echo \"Batch \" . ($batchIndex + 1) . \" completed\\n\\n\";\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30de\u30eb\u30c1\u30ab\u30e9\u30e0\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u4f5c\u6210<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    \"Product A\", \"Product B\", \"Product C\",\n    \"Product D\", \"Product E\", \"Product F\",\n    \"Product G\", \"Product H\"\n];\n\n\/\/ 3\u5217\u306e\u30b0\u30ea\u30c3\u30c9\u30ec\u30a4\u30a2\u30a6\u30c8\u7528\u306b\u5206\u5272\n$rows = array_chunk($products, 3);\n\n\/\/ HTML\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u51fa\u529b\necho \"&lt;table border='1'&gt;\\n\";\nforeach ($rows as $row) {\n    echo \"  &lt;tr&gt;\\n\";\n    foreach ($row as $product) {\n        echo \"    &lt;td&gt;$product&lt;\/td&gt;\\n\";\n    }\n    \/\/ \u884c\u306e\u6b8b\u308a\u306e\u30bb\u30eb\u3092\u7a7a\u30bb\u30eb\u3067\u57cb\u3081\u308b\n    for ($i = count($row); $i &lt; 3; $i++) {\n        echo \"    &lt;td&gt;&lt;\/td&gt;\\n\";\n    }\n    echo \"  &lt;\/tr&gt;\\n\";\n}\necho \"&lt;\/table&gt;\";\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u30b7\u30b9\u30c6\u30e0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$allItems = range(1, 45); \/\/ 1\u304b\u308945\u307e\u3067\u306e\u8981\u7d20\n$itemsPerPage = 10;\n\n\/\/ \u7dcf\u30da\u30fc\u30b8\u6570\u3092\u8a08\u7b97\n$totalItems = count($allItems);\n$totalPages = ceil($totalItems \/ $itemsPerPage);\n\n\/\/ \u5404\u30da\u30fc\u30b8\u306e\u30a2\u30a4\u30c6\u30e0\u3092\u53d6\u5f97\n$pages = array_chunk($allItems, $itemsPerPage);\n\n\/\/ \u7279\u5b9a\u306e\u30da\u30fc\u30b8\u3092\u8868\u793a\n$currentPage = 2; \/\/ 2\u30da\u30fc\u30b8\u76ee\uff080\u304b\u3089\u59cb\u307e\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09\nif (isset($pages[$currentPage])) {\n    echo \"Page \" . ($currentPage + 1) . \" of $totalPages:\\n\";\n    print_r($pages[$currentPage]);\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-70\">\u914d\u5217\u7d50\u5408\u3068\u5206\u5272\u306b\u95a2\u3059\u308b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u3088\u308a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u64cd\u4f5c\u306b\u306f\u3001\u8907\u6570\u306e\u914d\u5217\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-71\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30d5\u30e9\u30c3\u30c8\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4e8c\u6b21\u5143\u914d\u5217\n$nested = [\n    [\"a\", \"b\"],\n    [\"c\", \"d\", \"e\"],\n    [\"f\"]\n];\n\n\/\/ array_merge()\u306b\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u5e73\u5766\u5316\uff08PHP 7.4\u4ee5\u964d\uff09\n$flattened = array_merge(...$nested);\nprint_r($flattened); \/\/ [\"a\", \"b\", \"c\", \"d\", \"e\", \"f\"]\n\n\/\/ \u53e4\u3044PHP\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306e\u65b9\u6cd5\n$flattened = call_user_func_array('array_merge', $nested);\n\/\/ \u307e\u305f\u306f\n$flattened = [];\nforeach ($nested as $subArray) {\n    $flattened = array_merge($flattened, $subArray);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-72\">\u914d\u5217\u306e\u90e8\u5206\u7f6e\u63db<\/h4>\n\n\n\n<p>array_slice()\u3068array_splice()\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u914d\u5217\u306e\u7279\u5b9a\u90e8\u5206\u3060\u3051\u3092\u7f6e\u63db\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$original = [\"a\", \"b\", \"c\", \"d\", \"e\", \"f\"];\n$replacement = [\"X\", \"Y\", \"Z\"];\n\n\/\/ \"c\"\u3068\"d\"\u3092\u7f6e\u304d\u63db\u3048\u308b\n$before = array_slice($original, 0, 2); \/\/ [\"a\", \"b\"]\n$after = array_slice($original, 4);     \/\/ [\"e\", \"f\"]\n$result = array_merge($before, $replacement, $after);\nprint_r($result); \/\/ [\"a\", \"b\", \"X\", \"Y\", \"Z\", \"e\", \"f\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-73\">\u9023\u60f3\u914d\u5217\u306e\u7279\u5b9a\u30ad\u30fc\u3060\u3051\u3092\u62bd\u51fa<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"id\" =&gt; 1001,\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\",\n    \"password\" =&gt; \"hashed_password\",\n    \"role\" =&gt; \"admin\",\n    \"last_login\" =&gt; \"2023-06-01\"\n];\n\n\/\/ \u8868\u793a\u7528\u306b\u5b89\u5168\u306a\u30ad\u30fc\u3060\u3051\u3092\u62bd\u51fa\n$safeKeys = [\"name\", \"email\", \"role\"];\n$safeUser = array_intersect_key($user, array_flip($safeKeys));\nprint_r($safeUser);\n\/*\n[\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\",\n    \"role\" =&gt; \"admin\"\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-74\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4f7f\u7528\u4e0a\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\u64cd\u4f5c\u306f\u3001\u5927\u304d\u306a\u914d\u5217\u3084\u983b\u7e41\u306a\u64cd\u4f5c\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong>\uff1a\u7d50\u5408\u30fb\u5206\u5272\u95a2\u6570\u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u3001\u5927\u304d\u306a\u914d\u5217\u3092\u6271\u3046\u5834\u5408\u306f\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n\n\n\n<li><strong>array_merge()\u306e\u591a\u7528<\/strong>\uff1a\u591a\u6570\u306e\u914d\u5217\u3092\u30de\u30fc\u30b8\u3059\u308b\u5834\u5408\u3001\u914d\u5217\u306e\u6570\u306b\u5fdc\u3058\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001\u4e00\u5ea6\u306b\u5168\u3066\u306e\u914d\u5217\u3092\u30de\u30fc\u30b8\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002 <code>\/\/ \u975e\u52b9\u7387\uff08\u53cd\u5fa9\u547c\u3073\u51fa\u3057\uff09 $result = []; foreach ($arrayList as $array) { $result = array_merge($result, $array); } \/\/ \u52b9\u7387\u7684\uff08\u4e00\u5ea6\u306b\u5168\u3066\u30de\u30fc\u30b8\uff09 $result = array_merge(...$arrayList); \/\/ PHP 7.4\u4ee5\u964d<\/code><\/li>\n\n\n\n<li><strong>\u5927\u304d\u306a\u914d\u5217\u306e\u30b9\u30e9\u30a4\u30b9<\/strong>\uff1a\u5927\u304d\u306a\u914d\u5217\u3067\u983b\u7e41\u306b\u30b9\u30e9\u30a4\u30b9\u64cd\u4f5c\u3092\u884c\u3046\u5834\u5408\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n\n\n\n<li><strong>array_combine()\u306e\u30ad\u30fc\u3068\u5024\u306e\u6570<\/strong>\uff1a\u30ad\u30fc\u914d\u5217\u3068\u5024\u914d\u5217\u306e\u8981\u7d20\u6570\u304c\u4e00\u81f4\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u3001\u4e8b\u524d\u306b\u78ba\u8a8d\u3059\u308b\u304b\u3001array_slice()\u3067\u8abf\u6574\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u914d\u5217\u306e\u7d50\u5408\u3068\u5206\u5272\u64cd\u4f5c\u306f\u3001\u30c7\u30fc\u30bf\u306e\u524d\u51e6\u7406\u3001\u6574\u5f62\u3001\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3001\u30d0\u30c3\u30c1\u51e6\u7406\u306a\u3069\u3001\u69d8\u3005\u306a\u5834\u9762\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u95a2\u6570\u3092\u9078\u629e\u3057\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u307e\u3057\u3087\u3046\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u5185\u306e\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3057\u62bd\u51fa\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-75\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af3\uff1a\u691c\u7d22\u3068\u62bd\u51fa<\/h2>\n\n\n\n<p>\u914d\u5217\u5185\u306e\u7279\u5b9a\u306e\u8981\u7d20\u3092\u691c\u7d22\u3057\u305f\u308a\u3001\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3092\u62bd\u51fa\u3057\u305f\u308a\u3059\u308b\u64cd\u4f5c\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u3002PHP\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u64cd\u4f5c\u3092\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u691c\u7d22\u3068\u62bd\u51fa\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u95a2\u6570\u3068\u305d\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-76\">in_array()\u3068array_search()\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u914d\u5217\u5185\u306e\u5024\u3092\u691c\u7d22\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u76ee\u7684\u3068\u623b\u308a\u5024\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-77\">in_array() \u2013 \u5024\u306e\u5b58\u5728\u78ba\u8a8d<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\nin_array(mixed $needle, array $haystack, bool $strict = false): bool\n<\/pre>\n\n\n\n<p>in_array()\u306f\u3001\u914d\u5217\u5185\u306b\u7279\u5b9a\u306e\u5024\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u30d6\u30fc\u30eb\u5024\u3067\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\n\n\/\/ \u5024\u306e\u5b58\u5728\u78ba\u8a8d\nvar_dump(in_array(\"banana\", $fruits)); \/\/ bool(true)\nvar_dump(in_array(\"kiwi\", $fruits));   \/\/ bool(false)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-78\">array_search() \u2013 \u5024\u306e\u30ad\u30fc\u3092\u53d6\u5f97<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_search(mixed $needle, array $haystack, bool $strict = false): int|string|false\n<\/pre>\n\n\n\n<p>array_search()\u306f\u3001\u914d\u5217\u5185\u3067\u7279\u5b9a\u306e\u5024\u304c\u898b\u3064\u304b\u3063\u305f\u5834\u5408\u306b\u3001\u305d\u306e\u5024\u306b\u5bfe\u5fdc\u3059\u308b\u30ad\u30fc\u3092\u8fd4\u3057\u307e\u3059\u3002\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f<code>false<\/code>\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\n\n\/\/ \u5024\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$key = array_search(\"orange\", $fruits);\nvar_dump($key); \/\/ int(2)\n\n\/\/ \u5b58\u5728\u3057\u306a\u3044\u5024\u3092\u691c\u7d22\n$key = array_search(\"kiwi\", $fruits);\nvar_dump($key); \/\/ bool(false)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-79\">\u53b3\u5bc6\u6bd4\u8f03\u30e2\u30fc\u30c9<\/h4>\n\n\n\n<p>\u4e21\u95a2\u6570\u3068\u3082\u3001\u7b2c3\u5f15\u6570\u306b<code>true<\/code>\u3092\u6307\u5b9a\u3059\u308b\u3068\u53b3\u5bc6\u6bd4\u8f03\u30e2\u30fc\u30c9\uff08\u578b\u3082\u542b\u3081\u3066\u6bd4\u8f03\uff09\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [0, 1, 2, \"2\", 3];\n\n\/\/ \u975e\u53b3\u5bc6\u6bd4\u8f03\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\nvar_dump(in_array(2, $numbers));        \/\/ bool(true)\nvar_dump(in_array(\"2\", $numbers));      \/\/ bool(true) - \"2\"\u30682\u306f\u975e\u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u7b49\u3057\u3044\n\n\/\/ \u53b3\u5bc6\u6bd4\u8f03\nvar_dump(in_array(2, $numbers, true));  \/\/ bool(true)\nvar_dump(in_array(\"2\", $numbers, true)); \/\/ bool(true) - \u6587\u5b57\u5217\u306e\"2\"\u304c\u5b58\u5728\u3059\u308b\n\n\/\/ \u540c\u69d8\u306barray_search()\u3067\u3082\nvar_dump(array_search(2, $numbers));       \/\/ int(2)\nvar_dump(array_search(\"2\", $numbers));     \/\/ int(2) - \u975e\u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u6700\u521d\u306b\u898b\u3064\u304b\u3063\u305f2\u3092\u8fd4\u3059\nvar_dump(array_search(\"2\", $numbers, true)); \/\/ int(3) - \u53b3\u5bc6\u6bd4\u8f03\u3067\u306f\u6587\u5b57\u5217\"2\"\u306e\u4f4d\u7f6e\n<\/pre>\n\n\n\n<p>\u5e38\u306b\u53b3\u5bc6\u6bd4\u8f03\u30e2\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u7279\u306b\u3001\u914d\u5217\u306b<code>0<\/code>\u3001<code>''<\/code>\uff08\u7a7a\u6587\u5b57\u5217\uff09\u3001<code>null<\/code>\u306e\u3088\u3046\u306a\u5024\u304c\u542b\u307e\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-80\">array_search()\u306e\u623b\u308a\u5024\u306e\u6271\u3044<\/h4>\n\n\n\n<p>array_search()\u306f\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306b<code>false<\/code>\u3092\u8fd4\u3057\u307e\u3059\u304c\u3001\u30ad\u30fc<code>0<\/code>\u3068<code>false<\/code>\u3092\u533a\u5225\u3059\u308b\u306b\u306f\u53b3\u5bc6\u6bd4\u8f03\uff08<code>===<\/code>\uff09\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [\"first\", \"second\", \"third\"];\n$key = array_search(\"first\", $array);\n\n\/\/ \u9593\u9055\u3063\u305f\u5224\u5b9a\u65b9\u6cd5\nif (!$key) {\n    echo \"Not found\"; \/\/ \u30ad\u30fc\u304c0\u306e\u5834\u5408\u3082\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\n}\n\n\/\/ \u6b63\u3057\u3044\u5224\u5b9a\u65b9\u6cd5\nif ($key === false) {\n    echo \"Not found\";\n} else {\n    echo \"Found at key: $key\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-81\">\u591a\u6b21\u5143\u914d\u5217\u3067\u306e\u691c\u7d22<\/h4>\n\n\n\n<p>in_array()\u3068array_search()\u306f\u4e00\u6b21\u5143\u914d\u5217\u3092\u5bfe\u8c61\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u591a\u6b21\u5143\u914d\u5217\u5185\u306e\u691c\u7d22\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"id\" =&gt; 1, \"name\" =&gt; \"John\", \"active\" =&gt; true],\n    [\"id\" =&gt; 2, \"name\" =&gt; \"Jane\", \"active\" =&gt; false],\n    [\"id\" =&gt; 3, \"name\" =&gt; \"Bob\", \"active\" =&gt; true]\n];\n\n\/\/ \u591a\u6b21\u5143\u914d\u5217\u304b\u3089name=\"Jane\"\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u691c\u7d22\n$key = array_search(\"Jane\", array_column($users, \"name\"));\nif ($key !== false) {\n    echo \"Found user: \" . $users[$key][\"name\"];\n}\n\n\/\/ \u307e\u305f\u306f\u3001array_filter()\u3092\u4f7f\u7528\uff08\u5f8c\u8ff0\uff09\n$filteredUsers = array_filter($users, function($user) {\n    return $user[\"name\"] === \"Jane\";\n});\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-82\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e<\/h4>\n\n\n\n<p>in_array()\u3068array_search()\u306f\u914d\u5217\u5168\u4f53\u3092\u9806\u756a\u306b\u691c\u7d22\u3059\u308b\u305f\u3081\u3001\u5927\u304d\u306a\u914d\u5217\u3067\u306f\u52b9\u7387\u304c\u60aa\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5024\u306e\u30bb\u30c3\u30c8\u306b\u306f\u3001\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u304c\u9ad8\u901f\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u691c\u7d22\u304c\u983b\u7e41\u306b\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u5024\u3092\u30ad\u30fc\u3068\u3057\u305f\u914d\u5217\u3092\u4f7f\u7528\n$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\n$fruitsMap = array_flip($fruits); \/\/ [\"apple\" =&gt; 0, \"banana\" =&gt; 1, ...]\n\n\/\/ \u691c\u7d22\uff08O(n)\u306e\u51e6\u7406\uff09\n$exists = in_array(\"banana\", $fruits);\n\n\/\/ \u30ad\u30fc\u78ba\u8a8d\uff08O(1)\u306e\u51e6\u7406\uff09- \u3088\u308a\u9ad8\u901f\n$exists = isset($fruitsMap[\"banana\"]);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-83\">array_key_exists()\u306e\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>array_key_exists()\u306f\u3001\u914d\u5217\u5185\u306b\u7279\u5b9a\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_key_exists(string|int $key, array $array): bool\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-84\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"id\" =&gt; 1001,\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\",\n    \"active\" =&gt; true\n];\n\n\/\/ \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\nvar_dump(array_key_exists(\"email\", $user)); \/\/ bool(true)\nvar_dump(array_key_exists(\"phone\", $user)); \/\/ bool(false)\n\n\/\/ \u6570\u5024\u30ad\u30fc\u3067\u3082\u4f7f\u7528\u53ef\u80fd\n$items = [10 =&gt; \"Item A\", 20 =&gt; \"Item B\"];\nvar_dump(array_key_exists(10, $items)); \/\/ bool(true)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-85\">array_key_exists()\u3068isset()\u306e\u9055\u3044<\/h4>\n\n\n\n<p>array_key_exists()\u306f\u7279\u5b9a\u306e\u30ad\u30fc\u304c\u914d\u5217\u306b\u5b58\u5728\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u304c\u3001isset()\u306f\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u304b\u3064\u305d\u306e\u5024\u304c<code>null<\/code>\u3067\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    \"key1\" =&gt; \"value1\",\n    \"key2\" =&gt; null,\n    \"key3\" =&gt; 0\n];\n\n\/\/ array_key_exists() vs isset()\nvar_dump(array_key_exists(\"key1\", $data)); \/\/ bool(true)\nvar_dump(isset($data[\"key1\"]));            \/\/ bool(true)\n\nvar_dump(array_key_exists(\"key2\", $data)); \/\/ bool(true) - \u30ad\u30fc\u306f\u5b58\u5728\u3059\u308b\nvar_dump(isset($data[\"key2\"]));            \/\/ bool(false) - \u5024\u304cnull\u306a\u306e\u3067false\n\nvar_dump(array_key_exists(\"key3\", $data)); \/\/ bool(true)\nvar_dump(isset($data[\"key3\"]));            \/\/ bool(true) - 0\u306fnull\u3067\u306f\u306a\u3044\u306e\u3067true\n\nvar_dump(array_key_exists(\"key4\", $data)); \/\/ bool(false) - \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\nvar_dump(isset($data[\"key4\"]));            \/\/ bool(false) - \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\n<\/pre>\n\n\n\n<p>\u3053\u306e\u9055\u3044\u306f\u3001\u7279\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3084\u3001API\u30ec\u30b9\u30dd\u30f3\u30b9\u306a\u3069\u306e\u5916\u90e8\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306b\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-86\">\u4f7f\u3044\u5206\u3051\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5024\u304cnull\u304b\u3069\u3046\u304b\u3092\u533a\u5225\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/strong>\uff1aarray_key_exists()\u3092\u4f7f\u7528<\/li>\n\n\n\n<li><strong>\u5b58\u5728\u78ba\u8a8d\u3060\u3051\u3067null\u3082\u300c\u672a\u8a2d\u5b9a\u300d\u3068\u307f\u306a\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aisset()\u3092\u4f7f\u7528<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u91cd\u8996\u3059\u308b\u5834\u5408<\/strong>\uff1aisset()\u306e\u65b9\u304c\u82e5\u5e72\u9ad8\u901f<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4f7f\u3044\u5206\u3051\u306e\u5b9f\u4f8b\uff1a\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n$form = $_POST;\n\n\/\/ \u672a\u5165\u529b\uff08null\uff09\u3082\u53d7\u3051\u4ed8\u3051\u308b\u5834\u5408\nif (array_key_exists(\"comment\", $form)) {\n    \/\/ \u30b3\u30e1\u30f3\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5b58\u5728\u3059\u308b\uff08\u7a7a\u6b04\u3082\u8a31\u5bb9\uff09\n    $comment = $form[\"comment\"];\n} else {\n    \/\/ \u30b3\u30e1\u30f3\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5b58\u5728\u3057\u306a\u3044\n    $comment = \"\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30e1\u30f3\u30c8\";\n}\n\n\/\/ \u5024\u304c\u5fc5\u9808\u306e\u5834\u5408\nif (isset($form[\"email\"])) {\n    \/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5165\u529b\u3055\u308c\u3066\u3044\u308b\n    $email = $form[\"email\"];\n} else {\n    \/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5165\u529b\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3001null\u3067\u3042\u308b\n    echo \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-87\">\u8907\u6570\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u30ad\u30fc\u3092\u4e00\u5ea6\u306b\u78ba\u8a8d\u3059\u308b\u5834\u5408\u306f\u3001\u81ea\u4f5c\u306e\u95a2\u6570\u3084array_diff_key()\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5fc5\u8981\u306a\u30ad\u30fc\u304c\u3059\u3079\u3066\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n$required = [\"name\", \"email\", \"password\"];\n$form = [\"name\" =&gt; \"John\", \"email\" =&gt; \"john@example.com\"];\n\n$missing = array_diff($required, array_keys($form));\nif (!empty($missing)) {\n    echo \"Missing fields: \" . implode(\", \", $missing);\n}\n\n\/\/ \u307e\u305f\u306f\u3001\u3059\u3079\u3066\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u4e00\u5ea6\u306b\u78ba\u8a8d\nfunction all_keys_exist(array $keys, array $array): bool {\n    foreach ($keys as $key) {\n        if (!array_key_exists($key, $array)) {\n            return false;\n        }\n    }\n    return true;\n}\n\nif (!all_keys_exist($required, $form)) {\n    echo \"\u4e00\u90e8\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u4e0d\u8db3\u3057\u3066\u3044\u307e\u3059\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-88\">\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u306e\u62bd\u51fa\uff08array_filter()\uff09<\/h3>\n\n\n\n<p>array_filter()\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u4f7f\u3063\u3066\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u8981\u7d20\u3060\u3051\u3092\u62bd\u51fa\u3059\u308b\u5f37\u529b\u306a\u95a2\u6570\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_filter(array $array, ?callable $callback = null, int $mode = 0): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-89\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];\n\n\/\/ \u5076\u6570\u3060\u3051\u3092\u62bd\u51fa\n$evenNumbers = array_filter($numbers, function($n) {\n    return $n % 2 === 0;\n});\nprint_r($evenNumbers); \/\/ [1 =&gt; 2, 3 =&gt; 4, 5 =&gt; 6, 7 =&gt; 8, 9 =&gt; 10]\n\n\/\/ PHP\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\uff08PHP 7.4\u4ee5\u964d\uff09\n$oddNumbers = array_filter($numbers, fn($n) =&gt; $n % 2 === 1);\nprint_r($oddNumbers); \/\/ [0 =&gt; 1, 2 =&gt; 3, 4 =&gt; 5, 6 =&gt; 7, 8 =&gt; 9]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-90\">\u30ad\u30fc\u3092\u7dad\u6301\u3059\u308b<\/h4>\n\n\n\n<p>array_filter()\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30ad\u30fc\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u9023\u60f3\u914d\u5217\u3067\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    \"user1\" =&gt; [\"name\" =&gt; \"John\", \"age\" =&gt; 25, \"active\" =&gt; true],\n    \"user2\" =&gt; [\"name\" =&gt; \"Jane\", \"age\" =&gt; 30, \"active\" =&gt; false],\n    \"user3\" =&gt; [\"name\" =&gt; \"Bob\", \"age\" =&gt; 22, \"active\" =&gt; true]\n];\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30e6\u30fc\u30b6\u30fc\u3060\u3051\u3092\u62bd\u51fa\n$activeUsers = array_filter($users, function($user) {\n    return $user[\"active\"] === true;\n});\nprint_r($activeUsers);\n\/*\n[\n    \"user1\" =&gt; [...],\n    \"user3\" =&gt; [...]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-91\">\u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u3092\u4f7f\u3063\u305f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\n<p><code>$mode<\/code>\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u30ad\u30fc\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\u306e\u30e2\u30fc\u30c9\u30d1\u30e9\u30e1\u30fc\u30bf\nconst ARRAY_FILTER_USE_KEY = 1;    \/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u30ad\u30fc\u306e\u307f\u3092\u6e21\u3059\nconst ARRAY_FILTER_USE_BOTH = 2;   \/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u3092\u6e21\u3059\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    \"product_1\" =&gt; 100,\n    \"product_2\" =&gt; 200,\n    \"service_1\" =&gt; 300,\n    \"product_3\" =&gt; 400\n];\n\n\/\/ \u30ad\u30fc\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$productOnly = array_filter($data, function($key) {\n    return strpos($key, \"product\") === 0;\n}, ARRAY_FILTER_USE_KEY);\nprint_r($productOnly); \/\/ [\"product_1\" =&gt; 100, \"product_2\" =&gt; 200, \"product_3\" =&gt; 400]\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$expensiveProducts = array_filter($data, function($value, $key) {\n    return strpos($key, \"product\") === 0 &amp;&amp; $value &gt; 150;\n}, ARRAY_FILTER_USE_BOTH);\nprint_r($expensiveProducts); \/\/ [\"product_2\" =&gt; 200, \"product_3\" =&gt; 400]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-92\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306a\u3057\u306e\u4f7f\u7528<\/h4>\n\n\n\n<p>array_filter()\u306f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u7a7a\u3067\u306a\u3044\u5024\u3060\u3051\u3092\u6b8b\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u5165\u529b\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$values = [0, null, false, \"\", \"0\", \"text\", 42, [], [0]];\n\n\/\/ \u7a7a\u3067\u306a\u3044\u5024\u3060\u3051\u3092\u6b8b\u3059\n$nonEmpty = array_filter($values);\nprint_r($nonEmpty);\n\/*\n[\n    4 =&gt; \"0\",    \/\/ \u6587\u5b57\u5217\"0\"\u306f\u7a7a\u3067\u306a\u3044\n    5 =&gt; \"text\",\n    6 =&gt; 42,\n    8 =&gt; [0]     \/\/ \u8981\u7d20\u3092\u6301\u3064\u914d\u5217\u306f\u7a7a\u3067\u306a\u3044\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-93\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ CSV\u30c7\u30fc\u30bf\u306a\u3069\u3067\u7a7a\u306e\u884c\u3092\u524a\u9664\u3059\u308b\n$lines = [\"data1\", \"\", \"data2\", null, \"data3\", \"\"];\n$validLines = array_filter($lines);\nprint_r($validLines); \/\/ [0 =&gt; \"data1\", 2 =&gt; \"data2\", 4 =&gt; \"data3\"]\n\n\/\/ \u7a7a\u306e\u914d\u5217\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\n$nestedData = [\n    \"group1\" =&gt; [1, 2, 3],\n    \"group2\" =&gt; [],\n    \"group3\" =&gt; [4, 5],\n    \"group4\" =&gt; []\n];\n$nonEmptyGroups = array_filter($nestedData, fn($group) =&gt; !empty($group));\nprint_r($nonEmptyGroups); \/\/ [\"group1\" =&gt; [1, 2, 3], \"group3\" =&gt; [4, 5]]\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u691c\u7d22\u6a5f\u80fd\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    [\"id\" =&gt; 1, \"name\" =&gt; \"Smartphone\", \"price\" =&gt; 500, \"category\" =&gt; \"Electronics\"],\n    [\"id\" =&gt; 2, \"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"category\" =&gt; \"Electronics\"],\n    [\"id\" =&gt; 3, \"name\" =&gt; \"T-shirt\", \"price\" =&gt; 25, \"category\" =&gt; \"Clothing\"],\n    [\"id\" =&gt; 4, \"name\" =&gt; \"Coffee\", \"price\" =&gt; 5, \"category\" =&gt; \"Food\"]\n];\n\n\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u691c\u7d22\nfunction searchProducts($products, $query) {\n    return array_filter($products, function($product) use ($query) {\n        \/\/ \u691c\u7d22\u6761\u4ef6\n        $nameMatch = stripos($product[\"name\"], $query[\"term\"]) !== false;\n        $categoryMatch = !isset($query[\"category\"]) || $product[\"category\"] === $query[\"category\"];\n        $priceMatch = !isset($query[\"max_price\"]) || $product[\"price\"] &lt;= $query[\"max_price\"];\n        \n        return $nameMatch &amp;&amp; $categoryMatch &amp;&amp; $priceMatch;\n    });\n}\n\n\/\/ \u691c\u7d22\u306e\u5b9f\u884c\n$searchResults = searchProducts($products, [\n    \"term\" =&gt; \"t\",  \/\/ \"t\"\u3092\u542b\u3080\u540d\u524d\n    \"category\" =&gt; \"Electronics\",\n    \"max_price\" =&gt; 1000\n]);\nprint_r($searchResults);\n\/\/ [[\"id\" =&gt; 1, \"name\" =&gt; \"Smartphone\", \"price\" =&gt; 500, \"category\" =&gt; \"Electronics\"]]\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u306e\u7279\u5b9a\u8981\u7d20\u306e\u62bd\u51fa<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"id\" =&gt; 1, \"name\" =&gt; \"John\", \"roles\" =&gt; [\"admin\", \"editor\"]],\n    [\"id\" =&gt; 2, \"name\" =&gt; \"Jane\", \"roles\" =&gt; [\"editor\"]],\n    [\"id\" =&gt; 3, \"name\" =&gt; \"Bob\", \"roles\" =&gt; [\"subscriber\"]]\n];\n\n\/\/ \u7279\u5b9a\u306e\u5f79\u5272\u3092\u6301\u3064\u30e6\u30fc\u30b6\u30fc\u3092\u62bd\u51fa\n$admins = array_filter($users, function($user) {\n    return in_array(\"admin\", $user[\"roles\"], true);\n});\nprint_r($admins);\n\/\/ [[\"id\" =&gt; 1, \"name\" =&gt; \"John\", \"roles\" =&gt; [\"admin\", \"editor\"]]]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-94\">\u691c\u7d22\u3068\u62bd\u51fa\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306f\u3001\u691c\u7d22\u3068\u62bd\u51fa\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-95\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f5c\u6210\uff08\u691c\u7d22\u7528\u306e\u30de\u30c3\u30d7\uff09<\/h4>\n\n\n\n<p>\u983b\u7e41\u306b\u691c\u7d22\u3059\u308b\u5834\u5408\u306f\u3001\u691c\u7d22\u7528\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08\u30ad\u30fc\u30de\u30c3\u30d7\uff09\u3092\u4f5c\u6210\u3059\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"id\" =&gt; 101, \"email\" =&gt; \"john@example.com\", \"name\" =&gt; \"John\"],\n    [\"id\" =&gt; 102, \"email\" =&gt; \"jane@example.com\", \"name\" =&gt; \"Jane\"],\n    [\"id\" =&gt; 103, \"email\" =&gt; \"bob@example.com\", \"name\" =&gt; \"Bob\"]\n];\n\n\/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u30ad\u30fc\u306b\u3057\u305f\u30de\u30c3\u30d7\u3092\u4f5c\u6210\n$emailMap = [];\nforeach ($users as $user) {\n    $emailMap[$user[\"email\"]] = $user;\n}\n\n\/\/ \u9ad8\u901f\u306b\u691c\u7d22\n$userByEmail = $emailMap[\"jane@example.com\"] ?? null;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-96\">\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u3067\u6761\u4ef6\u306b\u5408\u3046\u6700\u521d\u306e\u8981\u7d20\u3060\u3051\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u3068\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function findFirst(array $items, callable $condition) {\n    foreach ($items as $item) {\n        if ($condition($item)) {\n            return $item;\n        }\n    }\n    return null;\n}\n\n\/\/ \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u304b\u3089\u6700\u521d\u306e\u4e00\u81f4\u3092\u691c\u7d22\n$largeArray = range(1, 10000);\n$first = findFirst($largeArray, fn($n) =&gt; $n &gt; 9990);\necho $first; \/\/ 9991\n<\/pre>\n\n\n\n<p>\u691c\u7d22\u3068\u62bd\u51fa\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u64cd\u4f5c\u3067\u3059\u3002PHP\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u9069\u5207\u306a\u95a2\u6570\u306e\u9078\u629e\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-97\">\u95a2\u6570\u9078\u629e\u306e\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/h4>\n\n\n<div id=\"id-0f991b7d-0166-4f7f-bb99-f638bf13784c\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u76ee\u7684<\/th><th>\u6700\u9069\u306a\u95a2\u6570<\/th><th>\u5099\u8003<\/th><\/tr><\/thead><tbody><tr><td>\u5024\u306e\u5b58\u5728\u78ba\u8a8d<\/td><td>in_array()<\/td><td>\u53b3\u5bc6\u6bd4\u8f03\u306b\u306f\u7b2c3\u5f15\u6570\u3092true\u306b<\/td><\/tr><tr><td>\u5024\u306e\u30ad\u30fc\u691c\u7d22<\/td><td>array_search()<\/td><td>\u53b3\u5bc6\u6bd4\u8f03\u306b\u306f\u7b2c3\u5f15\u6570\u3092true\u306b\u3001\u623b\u308a\u5024\u306ffalse\u30680\u3092\u533a\u5225<\/td><\/tr><tr><td>\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d<\/td><td>array_key_exists()<\/td><td>null\u5024\u3082\u533a\u5225\u3059\u308b\u5834\u5408<\/td><\/tr><tr><td>\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\uff08null\u9664\u5916\uff09<\/td><td>isset()<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u82e5\u5e72\u826f\u3044<\/td><\/tr><tr><td>\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u306e\u62bd\u51fa<\/td><td>array_filter()<\/td><td>\u30ad\u30fc\u3092\u7dad\u6301\u3001\u30ab\u30b9\u30bf\u30e0\u6761\u4ef6\u306b\u6700\u9069<\/td><\/tr><tr><td>\u7279\u5b9a\u306e\u5024\u3092\u6301\u3064\u8981\u7d20\u306e\u524a\u9664<\/td><td>array_diff()<\/td><td>\u5024\u306e\u6bd4\u8f03\u306e\u307f<\/td><\/tr><tr><td>\u7279\u5b9a\u306e\u30ad\u30fc\u3092\u6301\u3064\u8981\u7d20\u306e\u62bd\u51fa<\/td><td>array_intersect_key()<\/td><td>\u30ad\u30fc\u306e\u6bd4\u8f03\u306e\u307f<\/td><\/tr><tr><td>\u7279\u5b9a\u306e\u5024\u3092\u6301\u3064\u8981\u7d20\u306e\u62bd\u51fa<\/td><td>array_intersect()<\/td><td>\u5024\u306e\u6bd4\u8f03\u306e\u307f<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u306e\u4e26\u3079\u66ff\u3048\u3068\u9806\u5e8f\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-98\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af4\uff1a\u30bd\u30fc\u30c8\u3068\u9806\u5e8f\u64cd\u4f5c<\/h2>\n\n\n\n<p>\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3057\u3066\u8868\u793a\u3059\u308b\u969b\u3084\u3001\u7279\u5b9a\u306e\u9806\u5e8f\u3067\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u306f\u3001\u914d\u5217\u306e\u30bd\u30fc\u30c8\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002PHP\u306b\u306f\u69d8\u3005\u306a\u30bd\u30fc\u30c8\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9078\u629e\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u57fa\u672c\u7684\u306a\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u3092\u7dad\u6301\u3057\u305f\u30bd\u30fc\u30c8\u3001\u305d\u3057\u3066\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u95a2\u6570\u306e\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-99\">sort()\u3001rsort()\u306b\u3088\u308b\u57fa\u672c\u7684\u306a\u30bd\u30fc\u30c8<\/h3>\n\n\n\n<p>\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30bd\u30fc\u30c8\u95a2\u6570\u306f\u3001sort()\uff08\u6607\u9806\uff09\u3068rsort()\uff08\u964d\u9806\uff09\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u914d\u5217\u306e\u5024\u306b\u57fa\u3065\u3044\u3066\u30bd\u30fc\u30c8\u3057\u3001\u30ad\u30fc\u306f\u632f\u308a\u76f4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\nsort(array &amp;$array, int $flags = SORT_REGULAR): bool\nrsort(array &amp;$array, int $flags = SORT_REGULAR): bool\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-100\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u914d\u5217\u306e\u30bd\u30fc\u30c8\n$numbers = [5, 3, 8, 1, 7, 2];\n\nsort($numbers);\nprint_r($numbers); \/\/ [0 =&gt; 1, 1 =&gt; 2, 2 =&gt; 3, 3 =&gt; 5, 4 =&gt; 7, 5 =&gt; 8]\n\nrsort($numbers);\nprint_r($numbers); \/\/ [0 =&gt; 8, 1 =&gt; 7, 2 =&gt; 5, 3 =&gt; 3, 4 =&gt; 2, 5 =&gt; 1]\n\n\/\/ \u6587\u5b57\u5217\u914d\u5217\u306e\u30bd\u30fc\u30c8\n$fruits = [\"orange\", \"apple\", \"banana\", \"grape\"];\n\nsort($fruits);\nprint_r($fruits); \/\/ [0 =&gt; \"apple\", 1 =&gt; \"banana\", 2 =&gt; \"grape\", 3 =&gt; \"orange\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-101\">\u30bd\u30fc\u30c8\u30d5\u30e9\u30b0\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>sort()\u3084rsort()\u306a\u3069\u306e\u30bd\u30fc\u30c8\u95a2\u6570\u3067\u306f\u3001\u7b2c2\u5f15\u6570\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d5\u30e9\u30b0\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-82fc2679-91cd-4c96-9a9a-b623c28e58b8\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d5\u30e9\u30b0<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>SORT_REGULAR<\/td><td>\u30c7\u30d5\u30a9\u30eb\u30c8\u3002\u901a\u5e38\u306e\u6bd4\u8f03\uff08\u578b\u5909\u63db\u3092\u884c\u3046\uff09<\/td><\/tr><tr><td>SORT_NUMERIC<\/td><td>\u6570\u5024\u3068\u3057\u3066\u6bd4\u8f03<\/td><\/tr><tr><td>SORT_STRING<\/td><td>\u6587\u5b57\u5217\u3068\u3057\u3066\u6bd4\u8f03<\/td><\/tr><tr><td>SORT_LOCALE_STRING<\/td><td>\u73fe\u5728\u306e\u30ed\u30b1\u30fc\u30eb\u306b\u57fa\u3065\u3044\u3066\u6587\u5b57\u5217\u6bd4\u8f03<\/td><\/tr><tr><td>SORT_NATURAL<\/td><td>\u81ea\u7136\u9806\u30bd\u30fc\u30c8\uff08\u201dimg2\u2033\u306f\u201dimg10\u2033\u3088\u308a\u524d\uff09<\/td><\/tr><tr><td>SORT_FLAG_CASE<\/td><td>SORT_STRING\u3084SORT_NATURAL\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u3068\u6587\u5b57\u5217\u304c\u6df7\u5728\u3059\u308b\u914d\u5217\n$mixed = [\"10\", 1, \"2\", 20];\n\n\/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30bd\u30fc\u30c8\uff08\u578b\u5909\u63db\u3042\u308a\uff09\nsort($mixed);\nprint_r($mixed); \/\/ [0 =&gt; 1, 1 =&gt; \"10\", 2 =&gt; \"2\", 3 =&gt; 20]\n\n\/\/ \u6570\u5024\u3068\u3057\u3066\u30bd\u30fc\u30c8\nsort($mixed, SORT_NUMERIC);\nprint_r($mixed); \/\/ [0 =&gt; 1, 1 =&gt; \"2\", 2 =&gt; \"10\", 3 =&gt; 20]\n\n\/\/ \u6587\u5b57\u5217\u3068\u3057\u3066\u30bd\u30fc\u30c8\nsort($mixed, SORT_STRING);\nprint_r($mixed); \/\/ [0 =&gt; 1, 1 =&gt; \"10\", 2 =&gt; \"2\", 3 =&gt; 20]\n\n\/\/ \u81ea\u7136\u9806\u30bd\u30fc\u30c8\n$files = [\"img1.png\", \"img10.png\", \"img2.png\", \"img20.png\"];\n\nsort($files); \/\/ \u6a19\u6e96\u30bd\u30fc\u30c8\nprint_r($files); \/\/ [\"img1.png\", \"img10.png\", \"img2.png\", \"img20.png\"]\n\nsort($files, SORT_NATURAL); \/\/ \u81ea\u7136\u9806\u30bd\u30fc\u30c8\nprint_r($files); \/\/ [\"img1.png\", \"img2.png\", \"img10.png\", \"img20.png\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-102\">\u30ad\u30fc\u304c\u5931\u308f\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f<\/h4>\n\n\n\n<p>sort()\u3084rsort()\u306f\u914d\u5217\u306e\u30ad\u30fc\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09\u3092\u518d\u5272\u308a\u5f53\u3066\u3057\u307e\u3059\u3002\u9023\u60f3\u914d\u5217\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u5143\u306e\u30ad\u30fc\u3068\u5024\u306e\u95a2\u4fc2\u304c\u5931\u308f\u308c\u308b\u305f\u3081\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n];\n\nsort($user);\nprint_r($user); \/\/ [0 =&gt; 30, 1 =&gt; \"John\", 2 =&gt; \"New York\"]\n\/\/ \u5143\u306e\u30ad\u30fc\u304c\u5931\u308f\u308c\u3001\u5024\u306e\u307f\u304c\u4e26\u3079\u66ff\u3048\u3089\u308c\u3066\u3044\u307e\u3059\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-103\">asort()\u3001ksort()\u306b\u3088\u308b\u30ad\u30fc\u30fb\u5024\u3092\u7dad\u6301\u3057\u305f\u30bd\u30fc\u30c8<\/h3>\n\n\n\n<p>\u9023\u60f3\u914d\u5217\u3092\u30bd\u30fc\u30c8\u3059\u308b\u5834\u5408\u3001\u5143\u306e\u30ad\u30fc\u3068\u5024\u306e\u95a2\u4fc2\u3092\u7dad\u6301\u3057\u305f\u307e\u307e\u4e26\u3079\u66ff\u3048\u305f\u3044\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u306e\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-55b33898-8f11-4dff-8a9b-9ef12d9fac1b\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>asort()<\/td><td>\u5024\u3067\u6607\u9806\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u306f\u7dad\u6301<\/td><\/tr><tr><td>arsort()<\/td><td>\u5024\u3067\u964d\u9806\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u306f\u7dad\u6301<\/td><\/tr><tr><td>ksort()<\/td><td>\u30ad\u30fc\u3067\u6607\u9806\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u3068\u5024\u306e\u95a2\u4fc2\u306f\u7dad\u6301<\/td><\/tr><tr><td>krsort()<\/td><td>\u30ad\u30fc\u3067\u964d\u9806\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u3068\u5024\u306e\u95a2\u4fc2\u306f\u7dad\u6301<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\nasort(array &amp;$array, int $flags = SORT_REGULAR): bool\narsort(array &amp;$array, int $flags = SORT_REGULAR): bool\nksort(array &amp;$array, int $flags = SORT_REGULAR): bool\nkrsort(array &amp;$array, int $flags = SORT_REGULAR): bool\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-104\">\u5024\u306b\u3088\u308b\u30bd\u30fc\u30c8\uff08asort, arsort\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$scores = [\n    \"John\" =&gt; 85,\n    \"Jane\" =&gt; 92,\n    \"Bob\" =&gt; 78,\n    \"Alice\" =&gt; 95\n];\n\n\/\/ \u70b9\u6570\u3067\u6607\u9806\u30bd\u30fc\u30c8\nasort($scores);\nprint_r($scores);\n\/*\n[\n    \"Bob\" =&gt; 78,\n    \"John\" =&gt; 85,\n    \"Jane\" =&gt; 92,\n    \"Alice\" =&gt; 95\n]\n*\/\n\n\/\/ \u70b9\u6570\u3067\u964d\u9806\u30bd\u30fc\u30c8\narsort($scores);\nprint_r($scores);\n\/*\n[\n    \"Alice\" =&gt; 95,\n    \"Jane\" =&gt; 92,\n    \"John\" =&gt; 85,\n    \"Bob\" =&gt; 78\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-105\">\u30ad\u30fc\u306b\u3088\u308b\u30bd\u30fc\u30c8\uff08ksort, krsort\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    \"user3\" =&gt; \"Charlie\",\n    \"user1\" =&gt; \"Alice\",\n    \"user4\" =&gt; \"David\",\n    \"user2\" =&gt; \"Bob\"\n];\n\n\/\/ \u30ad\u30fc\u3067\u6607\u9806\u30bd\u30fc\u30c8\nksort($users);\nprint_r($users);\n\/*\n[\n    \"user1\" =&gt; \"Alice\",\n    \"user2\" =&gt; \"Bob\",\n    \"user3\" =&gt; \"Charlie\",\n    \"user4\" =&gt; \"David\"\n]\n*\/\n\n\/\/ \u30ad\u30fc\u3067\u964d\u9806\u30bd\u30fc\u30c8\nkrsort($users);\nprint_r($users);\n\/*\n[\n    \"user4\" =&gt; \"David\",\n    \"user3\" =&gt; \"Charlie\",\n    \"user2\" =&gt; \"Bob\",\n    \"user1\" =&gt; \"Alice\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-106\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\uff1a\u30c7\u30fc\u30bf\u306e\u8868\u793a\u9806\u5e8f\u306e\u5236\u5fa1<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5546\u54c1\u30c7\u30fc\u30bf\n$products = [\n    \"p103\" =&gt; [\"name\" =&gt; \"Smartphone\", \"price\" =&gt; 500],\n    \"p101\" =&gt; [\"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200],\n    \"p102\" =&gt; [\"name\" =&gt; \"Tablet\", \"price\" =&gt; 300]\n];\n\n\/\/ 1. \u5546\u54c1ID\u3067\u30bd\u30fc\u30c8\nksort($products);\necho \"\u5546\u54c1ID\u9806:\\n\";\nforeach ($products as $id =&gt; $product) {\n    echo \"$id: {$product['name']} - {$product['price']}\u5186\\n\";\n}\n\n\/\/ 2. \u4fa1\u683c\u306e\u5b89\u3044\u9806\u306b\u30bd\u30fc\u30c8\nuasort($products, function($a, $b) {\n    return $a[\"price\"] &lt;=&gt; $b[\"price\"];\n});\necho \"\\n\u4fa1\u683c\u306e\u5b89\u3044\u9806:\\n\";\nforeach ($products as $id =&gt; $product) {\n    echo \"$id: {$product['name']} - {$product['price']}\u5186\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-107\">usort()\u306b\u3088\u308b\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u95a2\u6570\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u3088\u308a\u8907\u96d1\u306a\u30bd\u30fc\u30c8\u6761\u4ef6\u3084\u3001\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8\u306b\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u6bd4\u8f03\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308busort()\u7cfb\u306e\u95a2\u6570\u304c\u6700\u9069\u3067\u3059\uff1a<\/p>\n\n\n<div id=\"id-37a9b58a-0187-433e-8f73-834f9396b443\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>usort()<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570\u3067\u6bd4\u8f03\u3057\u3066\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u306f\u518d\u5272\u308a\u5f53\u3066<\/td><\/tr><tr><td>uasort()<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570\u3067\u6bd4\u8f03\u3057\u3066\u30bd\u30fc\u30c8\u3001\u30ad\u30fc\u306f\u7dad\u6301<\/td><\/tr><tr><td>uksort()<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570\u3067\u30ad\u30fc\u3092\u6bd4\u8f03\u3057\u3066\u30bd\u30fc\u30c8<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\nusort(array &amp;$array, callable $callback): bool\nuasort(array &amp;$array, callable $callback): bool\nuksort(array &amp;$array, callable $callback): bool\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-108\">\u6bd4\u8f03\u95a2\u6570\u306e\u57fa\u672c<\/h4>\n\n\n\n<p>\u6bd4\u8f03\u95a2\u6570\u306f2\u3064\u306e\u8981\u7d20\u3092\u6bd4\u8f03\u3057\u3001\u6b21\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ca0\u306e\u5024\uff1a\u7b2c1\u5f15\u6570\u304c\u7b2c2\u5f15\u6570\u3088\u308a\u5c0f\u3055\u3044\uff08\u524d\u306b\u6765\u308b\uff09<\/li>\n\n\n\n<li>0\uff1a\u7b49\u3057\u3044<\/li>\n\n\n\n<li>\u6b63\u306e\u5024\uff1a\u7b2c1\u5f15\u6570\u304c\u7b2c2\u5f15\u6570\u3088\u308a\u5927\u304d\u3044\uff08\u5f8c\u306b\u6765\u308b\uff09<\/li>\n<\/ul>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u3053\u306e\u6bd4\u8f03\u3092\u7c21\u5358\u306b\u884c\u3046\u305f\u3081\u306e\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\uff08&lt;=&gt;\uff09\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-109\">usort()\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"orange\", \"apple\", \"banana\", \"grape\"];\n\n\/\/ \u6587\u5b57\u5217\u306e\u9577\u3055\u3067\u30bd\u30fc\u30c8\nusort($fruits, function($a, $b) {\n    return strlen($a) - strlen($b);\n});\nprint_r($fruits); \/\/ [\"apple\", \"grape\", \"orange\", \"banana\"]\n\n\/\/ PHP 7\u4ee5\u964d\u3067\u306f\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u304c\u4fbf\u5229\nusort($fruits, function($a, $b) {\n    return strlen($a) &lt;=&gt; strlen($b);\n});\n\n\/\/ PHP 7.4\u4ee5\u964d\u3067\u306f\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u3055\u3089\u306b\u7c21\u6f54\u306b\nusort($fruits, fn($a, $b) =&gt; strlen($a) &lt;=&gt; strlen($b));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-110\">\u8907\u6570\u6761\u4ef6\u3067\u306e\u4e26\u3079\u66ff\u3048<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"premium\" =&gt; false],\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 25, \"premium\" =&gt; true],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 30, \"premium\" =&gt; true],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"premium\" =&gt; false]\n];\n\n\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u30bd\u30fc\u30c8\uff1a\n\/\/ 1. \u30d7\u30ec\u30df\u30a2\u30e0\u30e6\u30fc\u30b6\u30fc\u3092\u512a\u5148\n\/\/ 2. \u5e74\u9f62\u306e\u82e5\u3044\u9806\n\/\/ 3. \u540d\u524d\u306e\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\nusort($users, function($a, $b) {\n    \/\/ \u307e\u305a\u30d7\u30ec\u30df\u30a2\u30e0\u72b6\u614b\u3067\u6bd4\u8f03\uff08true\u304c\u5148\uff09\n    if ($a[\"premium\"] !== $b[\"premium\"]) {\n        return $b[\"premium\"] &lt;=&gt; $a[\"premium\"];\n    }\n    \n    \/\/ \u30d7\u30ec\u30df\u30a2\u30e0\u72b6\u614b\u304c\u540c\u3058\u306a\u3089\u5e74\u9f62\u3067\u6bd4\u8f03\n    if ($a[\"age\"] !== $b[\"age\"]) {\n        return $a[\"age\"] &lt;=&gt; $b[\"age\"];\n    }\n    \n    \/\/ \u5e74\u9f62\u3082\u540c\u3058\u306a\u3089\u540d\u524d\u3067\u6bd4\u8f03\n    return $a[\"name\"] &lt;=&gt; $b[\"name\"];\n});\n\nprint_r($users);\n\/*\n[\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 25, \"premium\" =&gt; true],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 30, \"premium\" =&gt; true],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"premium\" =&gt; false],\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"premium\" =&gt; false]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-111\">uasort()\u3067\u30ad\u30fc\u3092\u7dad\u6301<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$scores = [\n    \"John\" =&gt; [\"math\" =&gt; 85, \"science\" =&gt; 90],\n    \"Jane\" =&gt; [\"math\" =&gt; 92, \"science\" =&gt; 88],\n    \"Bob\" =&gt; [\"math\" =&gt; 78, \"science\" =&gt; 85]\n];\n\n\/\/ \u6570\u5b66\u3068\u7406\u79d1\u306e\u5408\u8a08\u70b9\u3067\u30bd\u30fc\u30c8\uff08\u964d\u9806\uff09\nuasort($scores, function($a, $b) {\n    $total_a = $a[\"math\"] + $a[\"science\"];\n    $total_b = $b[\"math\"] + $b[\"science\"];\n    return $total_b &lt;=&gt; $total_a; \/\/ \u964d\u9806\u306a\u306e\u3067$b\u3068$a\u3092\u9006\u306b\n});\n\nprint_r($scores);\n\/*\n[\n    \"Jane\" =&gt; [\"math\" =&gt; 92, \"science\" =&gt; 88], \/\/ \u5408\u8a08180\n    \"John\" =&gt; [\"math\" =&gt; 85, \"science\" =&gt; 90], \/\/ \u5408\u8a08175\n    \"Bob\" =&gt; [\"math\" =&gt; 78, \"science\" =&gt; 85]   \/\/ \u5408\u8a08163\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-112\">uksort()\u3067\u30ad\u30fc\u3092\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    \"item_10\" =&gt; \"Value 10\",\n    \"item_1\" =&gt; \"Value 1\",\n    \"item_2\" =&gt; \"Value 2\",\n    \"item_21\" =&gt; \"Value 21\"\n];\n\n\/\/ \u30ad\u30fc\u3092\u81ea\u7136\u9806\u3067\u30bd\u30fc\u30c8\nuksort($data, function($a, $b) {\n    return strnatcmp($a, $b);\n});\n\nprint_r($data);\n\/*\n[\n    \"item_1\" =&gt; \"Value 1\",\n    \"item_2\" =&gt; \"Value 2\",\n    \"item_10\" =&gt; \"Value 10\",\n    \"item_21\" =&gt; \"Value 21\"\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-113\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-114\">array_multisort()\u306b\u3088\u308b\u8907\u6570\u30ad\u30fc\u3067\u306e\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<p>array_multisort()\u306f\u3001\u8907\u6570\u306e\u914d\u5217\u307e\u305f\u306f\u30de\u30eb\u30c1\u30ab\u30e9\u30e0\u306e\u914d\u5217\u3092\u4e00\u5ea6\u306b\u30bd\u30fc\u30c8\u3067\u304d\u308b\u975e\u5e38\u306b\u5f37\u529b\u306a\u95a2\u6570\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_multisort(array &amp;$array1, int $sort_order = SORT_ASC, int $sort_flags = SORT_REGULAR, mixed ...$rest): bool\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306f\u3001\u4e3b\u306b2\u3064\u306e\u7528\u9014\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8907\u6570\u306e\u914d\u5217\u3092\u540c\u6642\u306b\u30bd\u30fc\u30c8<\/strong>\uff08\u6700\u521d\u306e\u914d\u5217\u3092\u30ad\u30fc\u3068\u3057\u3066\uff09<\/li>\n\n\n\n<li><strong>\u591a\u6b21\u5143\u914d\u5217\u306e\u8907\u6570\u5217\uff08\u30ab\u30e9\u30e0\uff09\u3067\u30bd\u30fc\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-115\">\u8907\u6570\u914d\u5217\u306e\u540c\u6642\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$names = [\"John\", \"Jane\", \"Bob\", \"Alice\"];\n$ages = [30, 25, 35, 22];\n$cities = [\"New York\", \"London\", \"Tokyo\", \"Paris\"];\n\n\/\/ \u540d\u524d\u306e\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u3067\u30bd\u30fc\u30c8\u3057\u3001\u4ed6\u306e\u914d\u5217\u3082\u9023\u52d5\u3055\u305b\u308b\narray_multisort($names, SORT_ASC, $ages, $cities);\n\nprint_r($names); \/\/ [\"Alice\", \"Bob\", \"Jane\", \"John\"]\nprint_r($ages);  \/\/ [22, 35, 25, 30]\nprint_r($cities); \/\/ [\"Paris\", \"Tokyo\", \"London\", \"New York\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-116\">\u591a\u6b21\u5143\u914d\u5217\u306e\u8907\u6570\u5217\u3067\u306e\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"city\" =&gt; \"New York\"],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"city\" =&gt; \"London\"],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 35, \"city\" =&gt; \"Tokyo\"],\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 25, \"city\" =&gt; \"Paris\"]\n];\n\n\/\/ \u5e74\u9f62\uff08\u6607\u9806\uff09\u3068\u540d\u524d\uff08\u6607\u9806\uff09\u3067\u30bd\u30fc\u30c8\n$ages = array_column($users, \"age\");\n$names = array_column($users, \"name\");\n\narray_multisort($ages, SORT_ASC, $names, SORT_ASC, $users);\n\nprint_r($users);\n\/*\n[\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 25, \"city\" =&gt; \"Paris\"],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"city\" =&gt; \"London\"],\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"city\" =&gt; \"New York\"],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 35, \"city\" =&gt; \"Tokyo\"]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-117\">\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u591a\u6b21\u5143\u914d\u5217\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<p>\u3088\u308a\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8\u306f\u3001uasort()\u3068\u30ab\u30b9\u30bf\u30e0\u6bd4\u8f03\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    [\"id\" =&gt; 101, \"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"stock\" =&gt; 5, \"category\" =&gt; \"Electronics\"],\n    [\"id\" =&gt; 102, \"name\" =&gt; \"Smartphone\", \"price\" =&gt; 800, \"stock\" =&gt; 10, \"category\" =&gt; \"Electronics\"],\n    [\"id\" =&gt; 103, \"name\" =&gt; \"T-shirt\", \"price\" =&gt; 25, \"stock\" =&gt; 50, \"category\" =&gt; \"Clothing\"],\n    [\"id\" =&gt; 104, \"name\" =&gt; \"Coffee Maker\", \"price\" =&gt; 120, \"stock\" =&gt; 8, \"category\" =&gt; \"Home\"],\n    [\"id\" =&gt; 105, \"name\" =&gt; \"Tablet\", \"price\" =&gt; 400, \"stock\" =&gt; 0, \"category\" =&gt; \"Electronics\"]\n];\n\n\/\/ \u8907\u96d1\u306a\u30bd\u30fc\u30c8\uff1a\n\/\/ 1. \u5728\u5eab\u304c\u3042\u308b\u5546\u54c1\u3092\u512a\u5148\uff08stock &gt; 0\uff09\n\/\/ 2. \u30ab\u30c6\u30b4\u30ea\u3067\u30b0\u30eb\u30fc\u30d7\u5316\n\/\/ 3. \u540c\u3058\u30ab\u30c6\u30b4\u30ea\u5185\u3067\u306f\u4fa1\u683c\u306e\u5b89\u3044\u9806\nusort($products, function($a, $b) {\n    \/\/ \u307e\u305a\u5728\u5eab\u306e\u6709\u7121\u3067\u6bd4\u8f03\n    if (($a[\"stock\"] &gt; 0) !== ($b[\"stock\"] &gt; 0)) {\n        return ($b[\"stock\"] &gt; 0) &lt;=&gt; ($a[\"stock\"] &gt; 0);\n    }\n    \n    \/\/ \u30ab\u30c6\u30b4\u30ea\u3067\u6bd4\u8f03\n    if ($a[\"category\"] !== $b[\"category\"]) {\n        return $a[\"category\"] &lt;=&gt; $b[\"category\"];\n    }\n    \n    \/\/ \u540c\u3058\u30ab\u30c6\u30b4\u30ea\u5185\u3067\u306f\u4fa1\u683c\u3067\u6bd4\u8f03\n    return $a[\"price\"] &lt;=&gt; $b[\"price\"];\n});\n\n\/\/ \u6574\u5f62\u3057\u3066\u8868\u793a\nforeach ($products as $product) {\n    echo \"{$product['name']} ({$product['category']}) - {$product['price']}\u5186\";\n    if ($product['stock'] &lt;= 0) {\n        echo \" [\u5728\u5eab\u306a\u3057]\";\n    }\n    echo \"\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-118\">\u30bd\u30fc\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5b89\u5b9a\u6027<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u30bd\u30fc\u30c8\u306f\u6bd4\u8f03\u7684\u30ea\u30bd\u30fc\u30b9\u3092\u6d88\u8cbb\u3059\u308b\u64cd\u4f5c\u3067\u3042\u308a\u3001\u5927\u898f\u6a21\u306a\u914d\u5217\u3067\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-119\">\u30bd\u30fc\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u6bd4\u8f03<\/h4>\n\n\n\n<p>PHP\u306e\u7d44\u307f\u8fbc\u307f\u30bd\u30fc\u30c8\u95a2\u6570\u306f\u5185\u90e8\u7684\u306b\u30af\u30a4\u30c3\u30af\u30bd\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u30af\u30a4\u30c3\u30af\u30bd\u30fc\u30c8\u306f\u4e00\u822c\u7684\u306b\u9ad8\u901f\u3067\u3059\u304c\u3001\u6700\u60aa\u306e\u30b1\u30fc\u30b9\u3067\u306f O(n\u00b2) \u306e\u6642\u9593\u8907\u96d1\u5ea6\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u90e8\u306e\u30bd\u30fc\u30c8\u95a2\u6570\uff08\u7279\u306barray_multisort()\uff09\u306f\u3001\u5927\u304d\u306a\u914d\u5217\u306b\u5bfe\u3057\u3066\u5927\u91cf\u306e\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-120\">\u5b89\u5b9a\u30bd\u30fc\u30c8\u3068\u4e0d\u5b89\u5b9a\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<p>\u5b89\u5b9a\u30bd\u30fc\u30c8\u3068\u306f\u3001\u7b49\u3057\u3044\u30ad\u30fc\u3092\u6301\u3064\u8981\u7d20\u306e\u76f8\u5bfe\u7684\u306a\u9806\u5e8f\u304c\u4fdd\u6301\u3055\u308c\u308b\u30bd\u30fc\u30c8\u306e\u3053\u3068\u3067\u3059\u3002PHP\u306e\u6a19\u6e96\u30bd\u30fc\u30c8\u95a2\u6570\u306e\u591a\u304f\u306f\u4e0d\u5b89\u5b9a\u30bd\u30fc\u30c8\u3067\u3042\u308a\u3001\u7b49\u3057\u3044\u5024\u306e\u9806\u5e8f\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u7279\u5b9a\u306e\u9806\u5e8f\u4ed8\u3051\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u3001\u8907\u6570\u30ad\u30fc\u3067\u306e\u30bd\u30fc\u30c8\u3084\u3001\u30ab\u30b9\u30bf\u30e0\u6bd4\u8f03\u95a2\u6570\u306b\u3088\u308b\u660e\u793a\u7684\u306a\u9806\u5e8f\u4ed8\u3051\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-121\">\u4ee3\u66ff\u624b\u6cd5\uff1aSPL\u306e\u5229\u7528<\/h4>\n\n\n\n<p>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u5834\u5408\u3001SPL\uff08Standard PHP Library\uff09\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5229\u7528\u3059\u308b\u3068\u52b9\u7387\u7684\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ SplPriorityQueue\u306e\u4f8b\n$queue = new SplPriorityQueue();\n\n\/\/ \u30bf\u30b9\u30af\u3068\u512a\u5148\u5ea6\u3092\u8ffd\u52a0\n$queue-&gt;insert(\"\u7dca\u6025\u30d0\u30b0\u4fee\u6b63\", 100);\n$queue-&gt;insert(\"\u65b0\u6a5f\u80fd\u5b9f\u88c5\", 50);\n$queue-&gt;insert(\"\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u66f4\u65b0\", 25);\n$queue-&gt;insert(\"\u8efd\u5fae\u306aUI\u8abf\u6574\", 10);\n\n\/\/ \u512a\u5148\u5ea6\u9806\u306b\u51e6\u7406\n$queue-&gt;setExtractFlags(SplPriorityQueue::EXTR_BOTH);\nwhile (!$queue-&gt;isEmpty()) {\n    $item = $queue-&gt;extract();\n    echo \"\u30bf\u30b9\u30af: {$item['data']}, \u512a\u5148\u5ea6: {$item['priority']}\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-122\">\u30bd\u30fc\u30c8\u95a2\u6570\u306e\u9078\u629e\u30ac\u30a4\u30c9<\/h4>\n\n\n<div id=\"id-3c2e7c26-4f87-4608-9904-08e11ce79b9a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30bd\u30fc\u30c8\u306e\u7a2e\u985e<\/th><th>\u9069\u5207\u306a\u95a2\u6570<\/th><th>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/th><\/tr><\/thead><tbody><tr><td>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\uff08\u5024\u306e\u307f\uff09<\/td><td>sort(), rsort()<\/td><td>\u5358\u7d14\u306a\u30ea\u30b9\u30c8\u306e\u30bd\u30fc\u30c8<\/td><\/tr><tr><td>\u9023\u60f3\u914d\u5217\uff08\u5024\u3067\u30bd\u30fc\u30c8\uff09<\/td><td>asort(), arsort()<\/td><td>\u30e9\u30f3\u30ad\u30f3\u30b0\u3001\u5024\u306b\u57fa\u3065\u3044\u305f\u8868\u793a\u9806<\/td><\/tr><tr><td>\u9023\u60f3\u914d\u5217\uff08\u30ad\u30fc\u3067\u30bd\u30fc\u30c8\uff09<\/td><td>ksort(), krsort()<\/td><td>\u8f9e\u66f8\u9806\u3001ID\u306b\u3088\u308b\u9806\u5e8f\u4ed8\u3051<\/td><\/tr><tr><td>\u30ab\u30b9\u30bf\u30e0\u6761\u4ef6\u3067\u306e\u30bd\u30fc\u30c8<\/td><td>usort(), uasort()<\/td><td>\u8907\u96d1\u306a\u6761\u4ef6\u3001\u591a\u6b21\u5143\u914d\u5217<\/td><\/tr><tr><td>\u8907\u6570\u30ad\u30fc\u3067\u306e\u30bd\u30fc\u30c8<\/td><td>array_multisort()<\/td><td>\u30c6\u30fc\u30d6\u30eb\u30c7\u30fc\u30bf\u3001\u30de\u30eb\u30c1\u30ab\u30e9\u30e0\u30bd\u30fc\u30c8<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u914d\u5217\u306e\u30bd\u30fc\u30c8\u306f\u3001\u30c7\u30fc\u30bf\u8868\u793a\u306e\u6539\u5584\u3084\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u52b9\u7387\u5316\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002PHP\u306e\u591a\u5f69\u306a\u30bd\u30fc\u30c8\u95a2\u6570\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5\u306b\u95a2\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-123\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af5\uff1a\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5<\/h2>\n\n\n\n<p>\u914d\u5217\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u3067\u5909\u63db\u3057\u305f\u308a\u3001\u8907\u96d1\u306a\u52a0\u5de5\u3092\u884c\u3063\u305f\u308a\u3059\u308b\u64cd\u4f5c\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002PHP\u306b\u306f\u3001\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3092\u53d6\u308a\u5165\u308c\u305f\u5f37\u529b\u306a\u914d\u5217\u51e6\u7406\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u304f\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-124\">array_map()\u3092\u4f7f\u3063\u305f\u8981\u7d20\u306e\u4e00\u62ec\u5909\u63db<\/h3>\n\n\n\n<p>array_map()\u306f\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\uff08\u5909\u63db\uff09\u3092\u9069\u7528\u3057\u3001\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3059\u95a2\u6570\u3067\u3059\u3002\u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_map(?callable $callback, array $array, array ...$arrays): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-125\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u5404\u8981\u7d20\u30922\u500d\u306b\u3059\u308b\n$doubled = array_map(function($n) {\n    return $n * 2;\n}, $numbers);\nprint_r($doubled); \/\/ [2, 4, 6, 8, 10]\n\n\/\/ PHP 7.4\u4ee5\u964d\u3067\u306f\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u7c21\u6f54\u306b\u66f8\u3051\u308b\n$doubled = array_map(fn($n) =&gt; $n * 2, $numbers);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-126\">\u8907\u6570\u306e\u914d\u5217\u3092\u4e26\u5217\u51e6\u7406<\/h4>\n\n\n\n<p>array_map()\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u304c\u3001\u8907\u6570\u306e\u914d\u5217\u3092\u4e26\u5217\u3067\u51e6\u7406\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306f\u5404\u914d\u5217\u304b\u3089\u540c\u3058\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8981\u7d20\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$firstNames = [\"John\", \"Jane\", \"Bob\"];\n$lastNames = [\"Doe\", \"Smith\", \"Johnson\"];\n\n\/\/ 2\u3064\u306e\u914d\u5217\u3092\u7d50\u5408\u3057\u3066\u5b8c\u5168\u306a\u540d\u524d\u3092\u4f5c\u6210\n$fullNames = array_map(function($first, $last) {\n    return $first . \" \" . $last;\n}, $firstNames, $lastNames);\nprint_r($fullNames); \/\/ [\"John Doe\", \"Jane Smith\", \"Bob Johnson\"]\n\n\/\/ \u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u7570\u306a\u308b\u5834\u5408\u3001\u77ed\u3044\u65b9\u306b\u306fnull\u304c\u6e21\u3055\u308c\u308b\n$nums1 = [1, 2, 3, 4];\n$nums2 = [10, 20, 30];\n$results = array_map(function($a, $b) {\n    return [$a, $b, $a * ($b ?? 1)]; \/\/ null\u306e\u5834\u5408\u306f1\u3092\u4f7f\u7528\n}, $nums1, $nums2);\nprint_r($results);\n\/*\n[\n    [1, 10, 10],\n    [2, 20, 40],\n    [3, 30, 90],\n    [4, null, 4]  \/\/ $nums2\u306e4\u756a\u76ee\u306e\u8981\u7d20\u304c\u306a\u3044\u306e\u3067null\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-127\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306bnull\u3092\u6307\u5b9a<\/h4>\n\n\n\n<p>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306bnull\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u5165\u529b\u914d\u5217\u3092\u7d50\u5408\u3057\u3066\u591a\u6b21\u5143\u914d\u5217\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u914d\u5217\u306e\u300c\u8ee2\u7f6e\u300d\u306a\u3069\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$keys = [\"name\", \"age\", \"city\"];\n$values1 = [\"John\", 30, \"New York\"];\n$values2 = [\"Jane\", 25, \"London\"];\n\n\/\/ \u8907\u6570\u306e\u914d\u5217\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\n$combined = array_map(null, $keys, $values1, $values2);\nprint_r($combined);\n\/*\n[\n    [0] =&gt; [\"name\", \"John\", \"Jane\"],\n    [1] =&gt; [\"age\", 30, 25],\n    [2] =&gt; [\"city\", \"New York\", \"London\"]\n]\n*\/\n\n\/\/ \u3053\u308c\u3092\u4f7f\u3063\u3066\u914d\u5217\u3092\u8ee2\u7f6e\u3059\u308b\n$transposed = [];\nforeach ($combined as $row) {\n    $transposed[] = array_combine($keys, $row);\n}\nprint_r($transposed);\n\/*\n[\n    [0] =&gt; [\"name\" =&gt; \"name\", \"age\" =&gt; \"age\", \"city\" =&gt; \"city\"],\n    [1] =&gt; [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"city\" =&gt; \"New York\"],\n    [2] =&gt; [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"city\" =&gt; \"London\"]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-128\">\u30ad\u30fc\u306e\u4fdd\u6301<\/h4>\n\n\n\n<p>array_map()\u306f\u3001\u5143\u306e\u914d\u5217\u304c\u9023\u60f3\u914d\u5217\u306e\u5834\u5408\u3001\u30ad\u30fc\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$prices = [\n    \"apple\" =&gt; 150,\n    \"banana\" =&gt; 100,\n    \"orange\" =&gt; 120\n];\n\n\/\/ \u7a0e\u8fbc\u307f\u4fa1\u683c\u306b\u5909\u63db\uff0810%\u306e\u6d88\u8cbb\u7a0e\uff09\n$taxIncluded = array_map(function($price) {\n    return $price * 1.1;\n}, $prices);\nprint_r($taxIncluded);\n\/*\n[\n    \"apple\" =&gt; 165,\n    \"banana\" =&gt; 110,\n    \"orange\" =&gt; 132\n]\n*\/\n<\/pre>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u8907\u6570\u306e\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u3001\u6700\u521d\u306e\u914d\u5217\u306e\u30ad\u30fc\u3060\u3051\u304c\u4fdd\u6301\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-129\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u914d\u5217\u3078\u306e\u5909\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    new User(\"John\", \"john@example.com\"),\n    new User(\"Jane\", \"jane@example.com\"),\n    new User(\"Bob\", \"bob@example.com\")\n];\n\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u914d\u5217\u306b\u5909\u63db\n$userArrays = array_map(function($user) {\n    return [\n        'name' =&gt; $user-&gt;getName(),\n        'email' =&gt; $user-&gt;getEmail()\n    ];\n}, $users);\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u6574\u5f62<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$dates = [\"2023-01-15\", \"2023-02-20\", \"2023-03-25\"];\n\n\/\/ \u65e5\u4ed8\u5f62\u5f0f\u306e\u5909\u63db\n$formattedDates = array_map(function($date) {\n    $timestamp = strtotime($date);\n    return date(\"Y\u5e74m\u6708d\u65e5\", $timestamp);\n}, $dates);\nprint_r($formattedDates); \/\/ [\"2023\u5e7401\u670815\u65e5\", \"2023\u5e7402\u670820\u65e5\", \"2023\u5e7403\u670825\u65e5\"]\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>JSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$jsonStrings = [\n    '{\"name\":\"John\",\"age\":30}',\n    '{\"name\":\"Jane\",\"age\":25}',\n    '{\"name\":\"Bob\",\"age\":35}'\n];\n\n\/\/ JSON\u6587\u5b57\u5217\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3057\u3001\u7279\u5b9a\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u62bd\u51fa\n$names = array_map(function($json) {\n    $data = json_decode($json);\n    return $data-&gt;name;\n}, $jsonStrings);\nprint_r($names); \/\/ [\"John\", \"Jane\", \"Bob\"]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-130\">array_reduce()\u306b\u3088\u308b\u30c7\u30fc\u30bf\u306e\u96c6\u8a08<\/h3>\n\n\n\n<p>array_reduce()\u306f\u3001\u914d\u5217\u306e\u5168\u8981\u7d20\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u9806\u756a\u306b\u9069\u7528\u3057\u3001\u5358\u4e00\u306e\u5024\u306b\u96c6\u7d04\u3059\u308b\u95a2\u6570\u3067\u3059\u3002\u5408\u8a08\u3084\u5e73\u5747\u306e\u8a08\u7b97\u3001\u6700\u5927\u5024\/\u6700\u5c0f\u5024\u306e\u62bd\u51fa\u306a\u3069\u3001\u96c6\u8a08\u64cd\u4f5c\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_reduce(array $array, callable $callback, mixed $initial = null): mixed\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-131\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u5408\u8a08\u3092\u8a08\u7b97\n$sum = array_reduce($numbers, function($carry, $item) {\n    return $carry + $item;\n}, 0);\necho $sum; \/\/ 15\n\n\/\/ PHP 7.4\u4ee5\u964d\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\n$sum = array_reduce($numbers, fn($carry, $item) =&gt; $carry + $item, 0);\n<\/pre>\n\n\n\n<p><code>$carry<\/code>\u306f\u300c\u6301\u3061\u8d8a\u3057\u5024\u300d\u3067\u3001\u524d\u56de\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u5b9f\u884c\u7d50\u679c\u304c\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u6700\u521d\u306e\u5b9f\u884c\u6642\u306b\u306f<code>$initial<\/code>\u306e\u5024\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-132\">\u521d\u671f\u5024\u306e\u91cd\u8981\u6027<\/h4>\n\n\n\n<p>\u521d\u671f\u5024\u306e\u578b\u306f\u3001\u6700\u7d42\u7684\u306a\u623b\u308a\u5024\u306e\u578b\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u578b\u306e\u521d\u671f\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u521d\u671f\u5024\u30920\u306b\u3059\u308b\u3068\u6574\u6570\u306e\u5408\u8a08\n$sum = array_reduce($numbers, fn($c, $i) =&gt; $c + $i, 0);\necho $sum; \/\/ 15\uff08\u6574\u6570\uff09\n\n\/\/ \u521d\u671f\u5024\u3092\u7a7a\u6587\u5b57\u5217\u306b\u3059\u308b\u3068\u6587\u5b57\u5217\u3068\u3057\u3066\u9023\u7d50\n$concat = array_reduce($numbers, fn($c, $i) =&gt; $c . $i, \"\");\necho $concat; \/\/ \"12345\"\uff08\u6587\u5b57\u5217\uff09\n\n\/\/ \u521d\u671f\u5024\u3092\u914d\u5217\u306b\u3059\u308b\u3068\u914d\u5217\u306e\u69cb\u7bc9\u304c\u53ef\u80fd\n$grouped = array_reduce($numbers, function($result, $num) {\n    if ($num % 2 == 0) {\n        $result['even'][] = $num;\n    } else {\n        $result['odd'][] = $num;\n    }\n    return $result;\n}, ['even' =&gt; [], 'odd' =&gt; []]);\nprint_r($grouped); \/\/ ['even' =&gt; [2, 4], 'odd' =&gt; [1, 3, 5]]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-133\">\u7a7a\u306e\u914d\u5217\u306b\u5bfe\u3059\u308b\u6319\u52d5<\/h4>\n\n\n\n<p>\u7a7a\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066array_reduce()\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u521d\u671f\u5024\u304c\u305d\u306e\u307e\u307e\u8fd4\u3055\u308c\u307e\u3059\u3002\u521d\u671f\u5024\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f<code>null<\/code>\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$empty = [];\n\n$result = array_reduce($empty, fn($c, $i) =&gt; $c + $i, 0);\necho $result; \/\/ 0\uff08\u521d\u671f\u5024\uff09\n\n$result = array_reduce($empty, fn($c, $i) =&gt; $c + $i);\nvar_dump($result); \/\/ NULL\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-134\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7d71\u8a08\u8a08\u7b97<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$scores = [85, 92, 78, 96, 88];\n\n\/\/ \u5e73\u5747\u5024\u306e\u8a08\u7b97\n$average = array_reduce($scores, fn($c, $i) =&gt; $c + $i, 0) \/ count($scores);\necho \"\u5e73\u5747\u70b9: \" . $average; \/\/ 87.8\n\n\/\/ \u6700\u5927\u5024\u3068\u6700\u5c0f\u5024\u306e\u53d6\u5f97\n$stats = array_reduce($scores, function($result, $score) {\n    if ($score &gt; $result['max']) $result['max'] = $score;\n    if ($score &lt; $result['min']) $result['min'] = $score;\n    return $result;\n}, ['max' =&gt; PHP_INT_MIN, 'min' =&gt; PHP_INT_MAX]);\necho \"\u6700\u9ad8\u70b9: {$stats['max']}, \u6700\u4f4e\u70b9: {$stats['min']}\"; \/\/ \u6700\u9ad8\u70b9: 96, \u6700\u4f4e\u70b9: 78\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u69cb\u7bc9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$orders = [\n    [\"product\" =&gt; \"Laptop\", \"category\" =&gt; \"Electronics\", \"price\" =&gt; 1200],\n    [\"product\" =&gt; \"T-shirt\", \"category\" =&gt; \"Clothing\", \"price\" =&gt; 25],\n    [\"product\" =&gt; \"Coffee\", \"category\" =&gt; \"Food\", \"price\" =&gt; 5],\n    [\"product\" =&gt; \"Smartphone\", \"category\" =&gt; \"Electronics\", \"price\" =&gt; 800]\n];\n\n\/\/ \u30ab\u30c6\u30b4\u30ea\u5225\u306e\u5408\u8a08\u91d1\u984d\u3092\u8a08\u7b97\n$totalByCategory = array_reduce($orders, function($result, $order) {\n    $category = $order[\"category\"];\n    if (!isset($result[$category])) {\n        $result[$category] = 0;\n    }\n    $result[$category] += $order[\"price\"];\n    return $result;\n}, []);\nprint_r($totalByCategory);\n\/*\n[\n    \"Electronics\" =&gt; 2000,\n    \"Clothing\" =&gt; 25,\n    \"Food\" =&gt; 5\n]\n*\/\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30b9\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u968e\u5c64\u3092\u69cb\u7bc9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$paths = [\n    \"\/var\/www\/html\/index.php\",\n    \"\/var\/www\/html\/css\/style.css\",\n    \"\/var\/www\/images\/logo.png\",\n    \"\/etc\/nginx\/nginx.conf\"\n];\n\n\/\/ \u30d1\u30b9\u304b\u3089\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u9020\u3092\u69cb\u7bc9\n$fileSystem = array_reduce($paths, function($tree, $path) {\n    $parts = explode(\"\/\", trim($path, \"\/\"));\n    $current = &amp;$tree;\n    \n    foreach ($parts as $i =&gt; $part) {\n        if ($i === count($parts) - 1) {\n            \/\/ \u30d5\u30a1\u30a4\u30eb\n            $current[$part] = \"file\";\n        } else {\n            \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\n            if (!isset($current[$part])) {\n                $current[$part] = [];\n            }\n            $current = &amp;$current[$part];\n        }\n    }\n    \n    return $tree;\n}, []);\n\nprint_r($fileSystem);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-135\">array_walk()\u3092\u4f7f\u3063\u305f\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c<\/h3>\n\n\n\n<p>array_walk()\u306f\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u6307\u5b9a\u3057\u305f\u95a2\u6570\u3092\u9069\u7528\u3057\u307e\u3059\u3002array_map()\u3068\u306e\u4e3b\u306a\u9055\u3044\u306f\u3001array_walk()\u304c\u5143\u306e\u914d\u5217\u3092\u53c2\u7167\u3067\u5909\u66f4\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_walk(array &amp;$array, callable $callback, mixed $arg = null): bool\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-136\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\"];\n\n\/\/ \u5404\u8981\u7d20\u3092\u5927\u6587\u5b57\u306b\u5909\u63db\narray_walk($fruits, function(&amp;$value) {\n    $value = strtoupper($value);\n});\nprint_r($fruits); \/\/ [\"APPLE\", \"BANANA\", \"ORANGE\"]\n<\/pre>\n\n\n\n<p>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u6700\u521d\u306e\u30d1\u30e9\u30e1\u30fc\u30bf<code>$value<\/code>\u3092\u53c2\u7167\u3067\u53d7\u3051\u53d6\u308b\u3053\u3068\u3067\u3001\u5143\u306e\u914d\u5217\u306e\u5024\u3092\u76f4\u63a5\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-137\">\u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<p>array_walk()\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306f\u3001\u7b2c2\u5f15\u6570\u306b\u30ad\u30fc\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"email\" =&gt; \"john@example.com\"\n];\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u3092\u4f7f\u3063\u305f\u51e6\u7406\narray_walk($user, function(&amp;$value, $key) {\n    echo \"$key: $value\\n\";\n});\n\/\/ \u51fa\u529b:\n\/\/ name: John\n\/\/ age: 30\n\/\/ email: john@example.com\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-138\">\u8ffd\u52a0\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>array_walk()\u306e\u7b2c3\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u8ffd\u52a0\u306e\u30c7\u30fc\u30bf\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$prices = [\n    \"apple\" =&gt; 150,\n    \"banana\" =&gt; 100,\n    \"orange\" =&gt; 120\n];\n\n\/\/ \u7a0e\u7387\u3092\u8ffd\u52a0\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3059\narray_walk($prices, function(&amp;$price, $product, $taxRate) {\n    $price = [\n        \"price\" =&gt; $price,\n        \"tax\" =&gt; $price * $taxRate,\n        \"total\" =&gt; $price * (1 + $taxRate)\n    ];\n}, 0.1); \/\/ 10%\u306e\u7a0e\u7387\n\nprint_r($prices);\n\/*\n[\n    \"apple\" =&gt; [\n        \"price\" =&gt; 150,\n        \"tax\" =&gt; 15,\n        \"total\" =&gt; 165\n    ],\n    \"banana\" =&gt; [\n        \"price\" =&gt; 100,\n        \"tax\" =&gt; 10,\n        \"total\" =&gt; 110\n    ],\n    ...\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-139\">\u591a\u6b21\u5143\u914d\u5217\u306e\u51e6\u7406\uff1aarray_walk_recursive()<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306e\u5168\u3066\u306e\u672b\u7aef\u8981\u7d20\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u9069\u7528\u3059\u308b\u306b\u306f\u3001array_walk_recursive()\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_walk_recursive(array &amp;$array, callable $callback, mixed $arg = null): bool\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    \"user\" =&gt; [\n        \"name\" =&gt; \"John\",\n        \"contacts\" =&gt; [\n            \"email\" =&gt; \"john@example.com\",\n            \"phone\" =&gt; \"123-456-7890\"\n        ]\n    ],\n    \"settings\" =&gt; [\n        \"notifications\" =&gt; true,\n        \"theme\" =&gt; \"dark\"\n    ]\n];\n\n\/\/ \u3059\u3079\u3066\u306e\u6587\u5b57\u5217\u5024\u3092\u30c8\u30ea\u30df\u30f3\u30b0\u3059\u308b\narray_walk_recursive($data, function(&amp;$value) {\n    if (is_string($value)) {\n        $value = trim($value);\n    }\n});\n<\/pre>\n\n\n\n<p>\u305f\u3060\u3057\u3001array_walk_recursive()\u306f\u914d\u5217\u306e\u672b\u7aef\u306e\u5024\u306b\u306e\u307f\u9069\u7528\u3055\u308c\u3001\u914d\u5217\u81ea\u4f53\uff08\u4e2d\u9593\u30ce\u30fc\u30c9\uff09\u306b\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-140\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u30b5\u30cb\u30bf\u30a4\u30ba<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$formData = [\n    \"name\" =&gt; \" John Doe \",\n    \"email\" =&gt; \"john@example.com\",\n    \"message\" =&gt; \"&lt;script&gt;alert('XSS')&lt;\/script&gt;Hello\"\n];\n\n\/\/ \u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\narray_walk($formData, function(&amp;$value, $key) {\n    \/\/ \u6587\u5b57\u5217\u306e\u30c8\u30ea\u30e0\n    if (is_string($value)) {\n        $value = trim($value);\n    }\n    \n    \/\/ \u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u8ffd\u52a0\u306e\u30b5\u30cb\u30bf\u30a4\u30ba\u3092\u9069\u7528\n    if ($key === \"message\") {\n        $value = htmlspecialchars($value);\n    } elseif ($key === \"email\") {\n        $value = filter_var($value, FILTER_SANITIZE_EMAIL);\n    }\n});\n\nprint_r($formData);\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5909\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    \"p101\" =&gt; [\"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"discount\" =&gt; 0.1],\n    \"p102\" =&gt; [\"name\" =&gt; \"Smartphone\", \"price\" =&gt; 800, \"discount\" =&gt; 0.05],\n    \"p103\" =&gt; [\"name\" =&gt; \"Tablet\", \"price\" =&gt; 300, \"discount\" =&gt; 0]\n];\n\n\/\/ \u4fa1\u683c\u8a08\u7b97\u3068\u60c5\u5831\u306e\u8ffd\u52a0\narray_walk($products, function(&amp;$product, $id, $taxRate) {\n    $discountAmount = $product[\"price\"] * $product[\"discount\"];\n    $priceAfterDiscount = $product[\"price\"] - $discountAmount;\n    $tax = $priceAfterDiscount * $taxRate;\n    \n    \/\/ \u88fd\u54c1\u60c5\u5831\u3092\u62e1\u5f35\n    $product[\"id\"] = $id;\n    $product[\"discountAmount\"] = $discountAmount;\n    $product[\"priceAfterDiscount\"] = $priceAfterDiscount;\n    $product[\"tax\"] = $tax;\n    $product[\"finalPrice\"] = $priceAfterDiscount + $tax;\n}, 0.08); \/\/ 8%\u306e\u7a0e\u7387\n\nprint_r($products);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-141\">array_map()\u3001array_reduce()\u3001array_walk()\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>\u3053\u308c\u30893\u3064\u306e\u95a2\u6570\u306f\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u76ee\u7684\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u9069\u5207\u306a\u95a2\u6570\u3092\u9078\u3076\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-26b6c7e4-4124-4a25-89de-2d9fd111258a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><th>\u914d\u5217\u306e\u5909\u66f4<\/th><th>\u623b\u308a\u5024<\/th><\/tr><\/thead><tbody><tr><td>array_map()<\/td><td>\u5404\u8981\u7d20\u3092\u65b0\u3057\u3044\u5024\u306b\u5909\u63db\u3059\u308b<\/td><td>\u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3057\u306a\u3044<\/td><td>\u65b0\u3057\u3044\u914d\u5217<\/td><\/tr><tr><td>array_reduce()<\/td><td>\u8981\u7d20\u3092\u96c6\u7d04\u3057\u3066\u5358\u4e00\u306e\u7d50\u679c\u3092\u5f97\u308b<\/td><td>\u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3057\u306a\u3044<\/td><td>\u4efb\u610f\u306e\u578b\u306e\u5358\u4e00\u5024<\/td><\/tr><tr><td>array_walk()<\/td><td>\u5404\u8981\u7d20\u306b\u526f\u4f5c\u7528\u306e\u3042\u308b\u51e6\u7406\u3092\u9069\u7528\u3059\u308b<\/td><td>\u53c2\u7167\u6e21\u3057\u3067\u5143\u306e\u914d\u5217\u3092\u5909\u66f4\u3067\u304d\u308b<\/td><td>bool\uff08\u6210\u529f\/\u5931\u6557\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-142\">\u9078\u629e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aarray_map() <code>$uppercase = array_map('strtoupper', $strings);<\/code><\/li>\n\n\n\n<li><strong>\u96c6\u8a08\u5024\u3092\u8a08\u7b97\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aarray_reduce() <code>$sum = array_reduce($numbers, fn($c, $i) =&gt; $c + $i, 0);<\/code><\/li>\n\n\n\n<li><strong>\u65e2\u5b58\u306e\u914d\u5217\u3092\u5909\u66f4\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aarray_walk() <code>array_walk($items, function(&amp;$item) { $item-&gt;process(); });<\/code><\/li>\n\n\n\n<li><strong>\u8907\u6570\u306e\u914d\u5217\u3092\u4e26\u5217\u51e6\u7406\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aarray_map() <code>$fullNames = array_map(fn($first, $last) =&gt; \"$first $last\", $firstNames, $lastNames);<\/code><\/li>\n\n\n\n<li><strong>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u69cb\u7bc9\u3057\u305f\u3044\u5834\u5408<\/strong>\uff1aarray_reduce() <code>$grouped = array_reduce($items, function($result, $item) { $result[$item-&gt;category][] = $item; return $result; }, []);<\/code><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-143\">\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1<\/h3>\n\n\n\n<p>PHP 5.3\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u30af\u30ed\u30fc\u30b8\u30e3\uff08\u7121\u540d\u95a2\u6570\uff09\u3068\u3001PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u3088\u308a\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u8fd1\u3044\u30b9\u30bf\u30a4\u30eb\u3067\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-144\">\u95a2\u6570\u306e\u9023\u9396\uff08\u30c1\u30a7\u30fc\u30f3\uff09<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u64cd\u4f5c\u3092\u9023\u9396\u3055\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];\n\n\/\/ \u5076\u6570\u3060\u3051\u3092\u62bd\u51fa\u3057\u30662\u500d\u3057\u3001\u5408\u8a08\u3092\u8a08\u7b97\n$result = array_reduce(\n    array_map(\n        fn($n) =&gt; $n * 2,\n        array_filter($numbers, fn($n) =&gt; $n % 2 === 0)\n    ),\n    fn($c, $i) =&gt; $c + $i,\n    0\n);\necho $result; \/\/ 60 (2+4+6+8+10)*2\n\n\/\/ \u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u5909\u6570\u306b\u5206\u3051\u305f\u5834\u5408\n$evenNumbers = array_filter($numbers, fn($n) =&gt; $n % 2 === 0);\n$doubled = array_map(fn($n) =&gt; $n * 2, $evenNumbers);\n$sum = array_reduce($doubled, fn($c, $i) =&gt; $c + $i, 0);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-145\">\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u3046\u3068\u3001\u5916\u90e8\u5909\u6570\u3092\u300cuse\u300d\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$taxRate = 0.1;\n$threshold = 1000;\n\n$calculatePrice = function($price) use ($taxRate, $threshold) {\n    if ($price &gt; $threshold) {\n        \/\/ \u9ad8\u984d\u5546\u54c1\u306f\u5272\u5f15\u3042\u308a\n        $discount = 0.05;\n        return $price * (1 - $discount) * (1 + $taxRate);\n    }\n    return $price * (1 + $taxRate);\n};\n\n$prices = [800, 1200, 500, 1500];\n$finalPrices = array_map($calculatePrice, $prices);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-146\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u64cd\u4f5c\u3092\u8ad6\u7406\u7684\u306a\u300c\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u300d\u3068\u3057\u3066\u9023\u7d50\u3059\u308b\u624b\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function pipe(callable ...$functions) {\n    return function($x) use ($functions) {\n        return array_reduce(\n            $functions,\n            function($carry, $function) {\n                return $function($carry);\n            },\n            $x\n        );\n    };\n}\n\n$processData = pipe(\n    function($data) { return array_filter($data, fn($n) =&gt; $n &gt; 0); },\n    function($data) { return array_map(fn($n) =&gt; $n * 2, $data); },\n    function($data) { return array_sum($data); }\n);\n\n$numbers = [-2, 5, 0, 8, -1, 3];\n$result = $processData($numbers);\necho $result; \/\/ 32 (5+8+3)*2\n<\/pre>\n\n\n\n<p>\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5\u306b\u95a2\u3059\u308b\u3053\u308c\u3089\u306e\u95a2\u6570\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3084\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5909\u63db\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u306b\u7126\u70b9\u3092\u5f53\u3066\u305f\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-147\">\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af6\uff1a\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c<\/h2>\n\n\n\n<p>\u914d\u5217\u306e\u30ad\u30fc\u3068\u5024\u3092\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u306f\u3001\u30c7\u30fc\u30bf\u306e\u5909\u63db\u3084\u6700\u9069\u5316\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ad\u30fc\u3068\u5024\u3092\u62bd\u51fa\u3057\u305f\u308a\u3001\u5165\u308c\u66ff\u3048\u305f\u308a\u3001\u5909\u66f4\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3068\u3001\u305d\u308c\u3089\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-148\">array_keys()\u3068array_values()\u306e\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u3001\u914d\u5217\u304b\u3089\u30ad\u30fc\u307e\u305f\u306f\u5024\u3060\u3051\u3092\u62bd\u51fa\u3059\u308b\u57fa\u672c\u7684\u306a\u95a2\u6570\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-149\">array_keys() \u2013 \u30ad\u30fc\u306e\u62bd\u51fa<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_keys(array $array, mixed $filter_value = null, bool $strict = false): array\n<\/pre>\n\n\n\n<p>array_keys()\u306f\u3001\u914d\u5217\u306e\u3059\u3079\u3066\u306e\u30ad\u30fc\u3092\u65b0\u3057\u3044\u914d\u5217\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"id\" =&gt; 101,\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\",\n    \"active\" =&gt; true\n];\n\n\/\/ \u3059\u3079\u3066\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$keys = array_keys($user);\nprint_r($keys); \/\/ [0 =&gt; \"id\", 1 =&gt; \"name\", 2 =&gt; \"email\", 3 =&gt; \"active\"]\n<\/pre>\n\n\n\n<p>\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u7b2c2\u5f15\u6570\u3092\u4f7f\u3046\u3068\u3001\u7279\u5b9a\u306e\u5024\u3092\u6301\u3064\u30ad\u30fc\u3060\u3051\u3092\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$scores = [\n    \"John\" =&gt; 85,\n    \"Jane\" =&gt; 92,\n    \"Bob\" =&gt; 85,\n    \"Alice\" =&gt; 78\n];\n\n\/\/ 85\u70b9\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u30ad\u30fc\uff08\u540d\u524d\uff09\u3092\u53d6\u5f97\n$users = array_keys($scores, 85);\nprint_r($users); \/\/ [0 =&gt; \"John\", 1 =&gt; \"Bob\"]\n\n\/\/ \u53b3\u5bc6\u6bd4\u8f03\u3092\u4f7f\u7528\uff08\u578b\u3082\u4e00\u81f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff09\n$data = [42, \"42\", 42.0];\n$integerKeys = array_keys($data, 42, true);\nprint_r($integerKeys); \/\/ [0 =&gt; 0] (\u30a4\u30f3\u30c7\u30c3\u30af\u30b90\u306e\u307f)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-150\">array_values() \u2013 \u5024\u306e\u62bd\u51fa<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_values(array $array): array\n<\/pre>\n\n\n\n<p>array_values()\u306f\u3001\u914d\u5217\u306e\u3059\u3079\u3066\u306e\u5024\u3092\u53d6\u308a\u51fa\u3057\u3001\u6570\u5024\u6dfb\u5b57\u306e\u914d\u5217\u3068\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"id\" =&gt; 101,\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\"\n];\n\n\/\/ \u3059\u3079\u3066\u306e\u5024\u3092\u53d6\u5f97\n$values = array_values($user);\nprint_r($values); \/\/ [0 =&gt; 101, 1 =&gt; \"John Doe\", 2 =&gt; \"john@example.com\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-151\">array_values()\u306e\u4e3b\u306a\u7528\u9014<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u518d\u5272\u308a\u5f53\u3066<\/strong> array_values()\u306f\u3001\u7279\u306b\u4e00\u90e8\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u305f\u5f8c\u306b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9023\u7d9a\u3057\u305f\u6570\u5024\u306b\u623b\u3059\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\", \"grape\"];\nunset($fruits[1]); \/\/ \"banana\"\u3092\u524a\u9664\nprint_r($fruits); \/\/ [0 =&gt; \"apple\", 2 =&gt; \"orange\", 3 =&gt; \"grape\"]\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3059\n$fruits = array_values($fruits);\nprint_r($fruits); \/\/ [0 =&gt; \"apple\", 1 =&gt; \"orange\", 2 =&gt; \"grape\"]\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u9023\u60f3\u914d\u5217\u304b\u3089\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3078\u306e\u5909\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"city\" =&gt; \"New York\"\n];\n\n\/\/ foreach\u3067\u306e\u30eb\u30fc\u30d7\u7528\u306b\u30b7\u30f3\u30d7\u30eb\u306a\u914d\u5217\u306b\u5909\u63db\n$userData = array_values($user);\n\/\/ $userData\u306f [\"John\", 30, \"New York\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-152\">array_keys()\u3068array_values()\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u4f7f\u7528\u6cd5<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u53cd\u8ee2\uff08\u5225\u306e\u65b9\u6cd5\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\", \"banana\", \"orange\"];\n$reversed = array_combine(array_keys($fruits), array_reverse(array_values($fruits)));\nprint_r($reversed); \/\/ [0 =&gt; \"orange\", 1 =&gt; \"banana\", 2 =&gt; \"apple\"]\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u62bd\u51fa\u3068\u518d\u69cb\u7bc9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$userData = [\n    \"id\" =&gt; 101,\n    \"username\" =&gt; \"johndoe\",\n    \"password\" =&gt; \"hashed_password\", \/\/ \u6a5f\u5bc6\u60c5\u5831\n    \"email\" =&gt; \"john@example.com\",\n    \"role\" =&gt; \"user\"\n];\n\n\/\/ \u5b89\u5168\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3060\u3051\u3092\u62bd\u51fa\n$safeFields = [\"id\", \"username\", \"email\", \"role\"];\n$safeData = array_intersect_key($userData, array_flip($safeFields));\nprint_r($safeData);\n\/*\n[\n    \"id\" =&gt; 101,\n    \"username\" =&gt; \"johndoe\",\n    \"email\" =&gt; \"john@example.com\",\n    \"role\" =&gt; \"user\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-153\">PHP 7.3\u4ee5\u964d\u306e\u65b0\u95a2\u6570<\/h4>\n\n\n\n<p>PHP 7.3\u4ee5\u964d\u3067\u306f\u3001\u914d\u5217\u306e\u6700\u521d\u3068\u6700\u5f8c\u306e\u30ad\u30fc\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u4fbf\u5229\u306a\u95a2\u6570\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.3\u4ee5\u964d\n$array = [\"a\" =&gt; 1, \"b\" =&gt; 2, \"c\" =&gt; 3];\n\n$firstKey = array_key_first($array); \/\/ \"a\"\n$lastKey = array_key_last($array);   \/\/ \"c\"\n\n\/\/ PHP 7.3\u3088\u308a\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306e\u540c\u7b49\u306e\u51e6\u7406\n$keys = array_keys($array);\n$firstKey = reset($keys);\n$lastKey = end($keys);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-154\">array_flip()\u306b\u3088\u308b\u30ad\u30fc\u3068\u5024\u306e\u5165\u308c\u66ff\u3048<\/h3>\n\n\n\n<p>array_flip()\u306f\u3001\u914d\u5217\u306e\u30ad\u30fc\u3068\u5024\u3092\u5165\u308c\u66ff\u3048\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_flip(array $array): array\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-155\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\n    \"a\" =&gt; \"apple\",\n    \"b\" =&gt; \"banana\",\n    \"c\" =&gt; \"cherry\"\n];\n\n$flipped = array_flip($fruits);\nprint_r($flipped);\n\/*\n[\n    \"apple\" =&gt; \"a\",\n    \"banana\" =&gt; \"b\",\n    \"cherry\" =&gt; \"c\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-156\">\u91cd\u8907\u5024\u306e\u53d6\u308a\u6271\u3044<\/h4>\n\n\n\n<p>\u5143\u306e\u914d\u5217\u306b\u91cd\u8907\u3059\u308b\u5024\u304c\u3042\u308b\u5834\u5408\u3001\u5f8c\u306e\u8981\u7d20\u304c\u524d\u306e\u8981\u7d20\u3092\u4e0a\u66f8\u304d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [\n    \"one\" =&gt; 1,\n    \"another_one\" =&gt; 1,\n    \"two\" =&gt; 2\n];\n\n$flipped = array_flip($numbers);\nprint_r($flipped);\n\/*\n[\n    1 =&gt; \"another_one\", \/\/ \"one\"\u306f\u4e0a\u66f8\u304d\u3055\u308c\u305f\n    2 =&gt; \"two\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-157\">\u975e\u6587\u5b57\u5217\u30fb\u975e\u6574\u6570\u5024\u306e\u6319\u52d5<\/h4>\n\n\n\n<p>array_flip()\u306f\u3001\u6587\u5b57\u5217\u307e\u305f\u306f\u6574\u6570\u306e\u30ad\u30fc\u3068\u5024\u3057\u304b\u51e6\u7406\u3067\u304d\u307e\u305b\u3093\u3002\u305d\u308c\u4ee5\u5916\u306e\u578b\u306e\u5024\u306f\u8b66\u544a\u304c\u767a\u751f\u3057\u3001\u7121\u8996\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$mixed = [\n    \"a\" =&gt; 1,\n    \"b\" =&gt; 2.5,   \/\/ float\n    \"c\" =&gt; true,  \/\/ boolean\n    \"d\" =&gt; null,  \/\/ null\n    \"e\" =&gt; [],    \/\/ array\n    \"f\" =&gt; \"text\" \/\/ string\n];\n\n\/\/ \u8b66\u544a\u3092\u6291\u5236\n$flipped = @array_flip($mixed);\nprint_r($flipped);\n\/*\n[\n    1 =&gt; \"a\",\n    \"text\" =&gt; \"f\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-158\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9ad8\u901f\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210<\/strong> \u5024\u304b\u3089\u30ad\u30fc\u3078\u306e\u7d20\u65e9\u3044\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001array_flip()\u306f\u975e\u5e38\u306b\u52b9\u7387\u7684\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u56fd\u30b3\u30fc\u30c9\u3068\u56fd\u540d\u306e\u30de\u30c3\u30d4\u30f3\u30b0\n$countries = [\n    \"JP\" =&gt; \"Japan\",\n    \"US\" =&gt; \"United States\",\n    \"FR\" =&gt; \"France\",\n    \"DE\" =&gt; \"Germany\"\n];\n\n\/\/ \u56fd\u540d\u304b\u3089\u56fd\u30b3\u30fc\u30c9\u3078\u306e\u9006\u5f15\u304d\u30de\u30c3\u30d7\u3092\u4f5c\u6210\n$countryCodes = array_flip($countries);\n\n\/\/ \u4f7f\u7528\u4f8b: \u56fd\u540d\u304b\u3089\u56fd\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\n$code = $countryCodes[\"France\"] ?? \"Unknown\";\necho $code; \/\/ \"FR\"\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u91cd\u8907\u5024\u306e\u691c\u51fa<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$emails = [\n    \"user1\" =&gt; \"john@example.com\",\n    \"user2\" =&gt; \"jane@example.com\",\n    \"user3\" =&gt; \"john@example.com\", \/\/ \u91cd\u8907\n    \"user4\" =&gt; \"bob@example.com\"\n];\n\n\/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u30ad\u30fc\u306b\u5909\u63db\n$flipped = array_flip($emails);\n\/\/ \u5143\u306e\u914d\u5217\u3068\u9577\u3055\u3092\u6bd4\u8f03\nif (count($flipped) &lt; count($emails)) {\n    echo \"\u91cd\u8907\u3059\u308b\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\";\n}\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5024\u306e\u5b58\u5728\u78ba\u8a8d\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$allowedTypes = [\"jpg\", \"png\", \"gif\", \"webp\"];\n\n\/\/ \u65b9\u6cd51: in_array() - O(n)\u306e\u6642\u9593\u8907\u96d1\u5ea6\n$fileType = \"png\";\n$isAllowed = in_array($fileType, $allowedTypes);\n\n\/\/ \u65b9\u6cd52: array_flip() + isset() - O(1)\u306e\u6642\u9593\u8907\u96d1\u5ea6\n$allowedTypesMap = array_flip($allowedTypes);\n$isAllowed = isset($allowedTypesMap[$fileType]);\n\n\/\/ \u591a\u6570\u306e\u78ba\u8a8d\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u65b9\u6cd52\u306e\u65b9\u304c\u9ad8\u901f\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-159\">\u914d\u5217\u306e\u30ad\u30fc\u540d\u3092\u5909\u66f4\u3059\u308b\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u30ad\u30fc\u540d\u3092\u5909\u66f4\u3059\u308b\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u52b9\u7387\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-160\">1. \u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/h4>\n\n\n\n<p>\u6700\u3082\u4e00\u822c\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u5fc5\u8981\u306a\u30ad\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"first_name\" =&gt; \"John\",\n    \"last_name\" =&gt; \"Doe\",\n    \"e_mail\" =&gt; \"john.doe@example.com\" \/\/ \u30ad\u30fc\u540d\u3092\u5909\u66f4\u3057\u305f\u3044\n];\n\n\/\/ \u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\n$newUser = [\n    \"first_name\" =&gt; $user[\"first_name\"],\n    \"last_name\" =&gt; $user[\"last_name\"],\n    \"email\" =&gt; $user[\"e_mail\"] \/\/ \u65b0\u3057\u3044\u30ad\u30fc\u540d\n];\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-161\">2. array_combine()\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h4>\n\n\n\n<p>\u65e2\u5b58\u306e\u914d\u5217\u306e\u30ad\u30fc\u3092\u4e00\u62ec\u3067\u5909\u66f4\u3059\u308b\u306b\u306f\u3001array_combine()\u304c\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    \"firstName\" =&gt; \"John\",\n    \"lastName\" =&gt; \"Doe\",\n    \"emailAddress\" =&gt; \"john@example.com\"\n];\n\n\/\/ \u30ad\u30fc\u306e\u30de\u30c3\u30d4\u30f3\u30b0\n$keyMap = [\n    \"firstName\" =&gt; \"first_name\",\n    \"lastName\" =&gt; \"last_name\",\n    \"emailAddress\" =&gt; \"email\"\n];\n\n\/\/ \u62bd\u51fa\u3057\u305f\u3044\u5024\u3068\u65b0\u3057\u3044\u30ad\u30fc\u3092\u6e96\u5099\n$values = array_intersect_key($data, $keyMap);\n$newKeys = array_values(array_intersect_key($keyMap, $data));\n$oldKeys = array_keys(array_intersect_key($data, $keyMap));\n\n\/\/ \u914d\u5217\u3092\u518d\u69cb\u7bc9\n$converted = array_combine($newKeys, array_values($values));\nprint_r($converted);\n\/*\n[\n    \"first_name\" =&gt; \"John\",\n    \"last_name\" =&gt; \"Doe\",\n    \"email\" =&gt; \"john@example.com\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-162\">3. \u5358\u4e00\u30ad\u30fc\u306e\u5909\u66f4<\/h4>\n\n\n\n<p>\u5358\u4e00\u306e\u30ad\u30fc\u3060\u3051\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"id\" =&gt; 101,\n    \"name\" =&gt; \"John\",\n    \"e-mail\" =&gt; \"john@example.com\" \/\/ \u3053\u306e\u30ad\u30fc\u3092\u5909\u66f4\u3057\u305f\u3044\n];\n\n\/\/ \u65b9\u6cd51: unset() \u3068 \u4ee3\u5165\n$user[\"email\"] = $user[\"e-mail\"];\nunset($user[\"e-mail\"]);\n\n\/\/ \u65b9\u6cd52: \u30ea\u30b9\u30c8\u4ee3\u5165\u3068array_keys\/array_values\uff08PHP 7.1\u4ee5\u964d\uff09\n[\n    \"id\" =&gt; $id,\n    \"name\" =&gt; $name,\n    \"e-mail\" =&gt; $email\n] = $user;\n\n$user = [\n    \"id\" =&gt; $id,\n    \"name\" =&gt; $name,\n    \"email\" =&gt; $email\n];\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-163\">4. \u518d\u5e30\u7684\u306a\u30ad\u30fc\u5909\u66f4<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306e\u30ad\u30fc\u3092\u518d\u5e30\u7684\u306b\u5909\u66f4\u3059\u308b\u306b\u306f\u3001\u518d\u5e30\u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function changeArrayKeys($array, $keyMap) {\n    $result = [];\n    foreach ($array as $key =&gt; $value) {\n        \/\/ \u65b0\u3057\u3044\u30ad\u30fc\u540d\u3092\u53d6\u5f97\uff08\u30de\u30c3\u30d7\u306b\u306a\u3044\u5834\u5408\u306f\u5143\u306e\u30ad\u30fc\u3092\u4f7f\u7528\uff09\n        $newKey = $keyMap[$key] ?? $key;\n        \n        \/\/ \u5024\u304c\u914d\u5217\u306e\u5834\u5408\u306f\u518d\u5e30\u7684\u306b\u51e6\u7406\n        if (is_array($value)) {\n            $result[$newKey] = changeArrayKeys($value, $keyMap);\n        } else {\n            $result[$newKey] = $value;\n        }\n    }\n    return $result;\n}\n\n$data = [\n    \"firstName\" =&gt; \"John\",\n    \"lastName\" =&gt; \"Doe\",\n    \"contactInfo\" =&gt; [\n        \"emailAddress\" =&gt; \"john@example.com\",\n        \"phoneNumber\" =&gt; \"123-456-7890\"\n    ]\n];\n\n$keyMap = [\n    \"firstName\" =&gt; \"first_name\",\n    \"lastName\" =&gt; \"last_name\",\n    \"contactInfo\" =&gt; \"contact_info\",\n    \"emailAddress\" =&gt; \"email\",\n    \"phoneNumber\" =&gt; \"phone\"\n];\n\n$converted = changeArrayKeys($data, $keyMap);\nprint_r($converted);\n\/*\n[\n    \"first_name\" =&gt; \"John\",\n    \"last_name\" =&gt; \"Doe\",\n    \"contact_info\" =&gt; [\n        \"email\" =&gt; \"john@example.com\",\n        \"phone\" =&gt; \"123-456-7890\"\n    ]\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-164\">\u5b9f\u8df5\u7684\u306a\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-165\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5909\u66f4<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u3051\u3059\u308b\u3053\u3068\u306f\u3001\u3088\u304f\u3042\u308b\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u30e6\u30fc\u30b6\u30fc\u30ea\u30b9\u30c8\uff08id\u3001name\u3001email\u306e\u5217\u3092\u542b\u3080\uff09\n$users = [\n    [\"id\" =&gt; 101, \"name\" =&gt; \"John\", \"email\" =&gt; \"john@example.com\"],\n    [\"id\" =&gt; 102, \"name\" =&gt; \"Jane\", \"email\" =&gt; \"jane@example.com\"],\n    [\"id\" =&gt; 103, \"name\" =&gt; \"Bob\", \"email\" =&gt; \"bob@example.com\"]\n];\n\n\/\/ ID\u3092\u30ad\u30fc\u306b\u3057\u305f\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\n$usersById = [];\nforeach ($users as $user) {\n    $usersById[$user[\"id\"]] = $user;\n}\n\n\/\/ \u3088\u308a\u7c21\u6f54\u306a\u65b9\u6cd5\uff08PHP 5.5\u4ee5\u964d\uff09\n$usersById = array_column($users, null, \"id\");\nprint_r($usersById);\n\/*\n[\n    101 =&gt; [\"id\" =&gt; 101, \"name\" =&gt; \"John\", \"email\" =&gt; \"john@example.com\"],\n    102 =&gt; [\"id\" =&gt; 102, \"name\" =&gt; \"Jane\", \"email\" =&gt; \"jane@example.com\"],\n    103 =&gt; [\"id\" =&gt; 103, \"name\" =&gt; \"Bob\", \"email\" =&gt; \"bob@example.com\"]\n]\n*\/\n\n\/\/ \u7279\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u7d20\u65e9\u304f\u30a2\u30af\u30bb\u30b9\necho $usersById[102][\"name\"]; \/\/ \"Jane\"\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-166\">\u30ad\u30fc\u4ed8\u304d\u914d\u5217\u3068\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u5909\u63db<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u306e\u5f62\u5f0f\u3092\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u95a2\u6570\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ad\u30fc\u4ed8\u304d\u914d\u5217\uff08\u9023\u60f3\u914d\u5217\uff09\n$userData = [\n    \"id\" =&gt; 101,\n    \"name\" =&gt; \"John Doe\",\n    \"email\" =&gt; \"john@example.com\"\n];\n\n\/\/ 1. \u9023\u60f3\u914d\u5217 -&gt; \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$indexedArray = array_values($userData);\n\/\/ [\"John Doe\", \"john@example.com\"]\n\n\/\/ 2. \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217 -&gt; \u9023\u60f3\u914d\u5217\uff08\u30ab\u30b9\u30bf\u30e0\u30ad\u30fc\uff09\n$keys = [\"user_id\", \"full_name\", \"email_address\"];\n$associativeArray = array_combine($keys, $indexedArray);\n\/*\n[\n    \"user_id\" =&gt; 101,\n    \"full_name\" =&gt; \"John Doe\",\n    \"email_address\" =&gt; \"john@example.com\"\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-167\">\u914d\u5217\u306e\u5dee\u5206\u3068\u4ea4\u5dee<\/h4>\n\n\n\n<p>\u30ad\u30fc\u3092\u57fa\u6e96\u306b\u914d\u5217\u306e\u5dee\u5206\u3084\u4ea4\u5dee\u3092\u6c42\u3081\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$defaults = [\n    \"theme\" =&gt; \"light\",\n    \"language\" =&gt; \"en\",\n    \"notifications\" =&gt; true,\n    \"sidebar\" =&gt; \"left\"\n];\n\n$userSettings = [\n    \"language\" =&gt; \"ja\",\n    \"sidebar\" =&gt; \"right\",\n    \"fontSize\" =&gt; \"large\"\n];\n\n\/\/ 1. \u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306b\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u8a2d\u5b9a\u3092\u62bd\u51fa\n$additional = array_diff_key($userSettings, $defaults);\nprint_r($additional); \/\/ [\"fontSize\" =&gt; \"large\"]\n\n\/\/ 2. \u30e6\u30fc\u30b6\u30fc\u304c\u5909\u66f4\u3057\u305f\u8a2d\u5b9a\u3092\u62bd\u51fa\n$changed = array_intersect_key($userSettings, $defaults);\nprint_r($changed); \/\/ [\"language\" =&gt; \"ja\", \"sidebar\" =&gt; \"right\"]\n\n\/\/ 3. \u6700\u7d42\u7684\u306a\u8a2d\u5b9a\u3092\u4f5c\u6210\uff08\u30c7\u30d5\u30a9\u30eb\u30c8 + \u30e6\u30fc\u30b6\u30fc\u8a2d\u5b9a\uff09\n$finalSettings = array_merge($defaults, $userSettings);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-168\">\u56fd\u969b\u5316\uff08i18n\uff09\u3067\u306e\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c<\/h4>\n\n\n\n<p>\u591a\u8a00\u8a9e\u5bfe\u5fdc\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u304c\u983b\u7e41\u306b\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8a00\u8a9e\u30d5\u30a1\u30a4\u30eb: messages_en.php\n$messages_en = [\n    \"welcome\" =&gt; \"Welcome\",\n    \"login\" =&gt; \"Log in\",\n    \"signup\" =&gt; \"Sign up\",\n    \"logout\" =&gt; \"Log out\"\n];\n\n\/\/ \u8a00\u8a9e\u30d5\u30a1\u30a4\u30eb: messages_ja.php\n$messages_ja = [\n    \"welcome\" =&gt; \"\u3088\u3046\u3053\u305d\",\n    \"login\" =&gt; \"\u30ed\u30b0\u30a4\u30f3\",\n    \"signup\" =&gt; \"\u65b0\u898f\u767b\u9332\",\n    \"logout\" =&gt; \"\u30ed\u30b0\u30a2\u30a6\u30c8\"\n];\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u8a00\u8a9e\u8a2d\u5b9a\n$userLang = \"ja\";\n\n\/\/ \u9069\u5207\u306a\u8a00\u8a9e\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\n$messages = $userLang === \"ja\" ? $messages_ja : $messages_en;\n\n\/\/ \u4f7f\u7528\u4f8b\necho $messages[\"welcome\"]; \/\/ \"\u3088\u3046\u3053\u305d\"\n\n\/\/ \u8db3\u308a\u306a\u3044\u7ffb\u8a33\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u8a00\u8a9e\u3067\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\n$messages_fr = [\n    \"welcome\" =&gt; \"Bienvenue\",\n    \"login\" =&gt; \"Se connecter\"\n    \/\/ \"signup\"\u3068\"logout\"\u304c\u672a\u7ffb\u8a33\n];\n\n\/\/ \u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u6a5f\u80fd\u4ed8\u304d\u306e\u7ffb\u8a33\u53d6\u5f97\u95a2\u6570\nfunction translate($key, $lang = \"fr\", $fallbackLang = \"en\") {\n    global $messages_en, $messages_fr;\n    \n    $translations = $lang === \"fr\" ? $messages_fr : $messages_en;\n    $fallbacks = $messages_en;\n    \n    return $translations[$key] ?? $fallbacks[$key] ?? $key;\n}\n\necho translate(\"signup\"); \/\/ \"Sign up\"\uff08\u30d5\u30e9\u30f3\u30b9\u8a9e\u306b\u306a\u3044\u306e\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u82f1\u8a9e\uff09\n<\/pre>\n\n\n\n<p>\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u306f\u3001\u914d\u5217\u30c7\u30fc\u30bf\u306e\u5909\u63db\u3001\u6700\u9069\u5316\u3001\u69cb\u9020\u5316\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u9069\u5207\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u3068\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>$memBefore = memory_get_usage();<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if ($useReference) {\n    \/\/ \u53c2\u7167\u6e21\u3057\u3067\u30eb\u30fc\u30d7\n    foreach ($largeArray as &amp;$item) {\n        $temp = $item-&gt;data;\n    }\n    unset($item); \/\/ \u53c2\u7167\u3092\u89e3\u9664\n} else {\n    \/\/ \u5024\u6e21\u3057\u3067\u30eb\u30fc\u30d7\n    foreach ($largeArray as $item) {\n        $temp = $item-&gt;data;\n    }\n}\n\n$memAfter = memory_get_usage();\nreturn $memAfter - $memBefore;\n<\/pre>\n\n\n\n<p>}<\/p>\n\n\n\n<p>echo \u201c\u5024\u6e21\u3057\u4f7f\u7528\u6642\u306e\u8ffd\u52a0\u30e1\u30e2\u30ea: \u201d . testMemoryUsage(false) . \u201d \u30d0\u30a4\u30c8\\n\u201d; echo \u201c\u53c2\u7167\u6e21\u3057\u4f7f\u7528\u6642\u306e\u8ffd\u52a0\u30e1\u30e2\u30ea: \u201d . testMemoryUsage(true) . \u201d \u30d0\u30a4\u30c8\\n\u201d;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n\u5b9f\u969b\u306e\u7d50\u679c\u306f\u74b0\u5883\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u7528\u3059\u308b\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5927\u5e45\u306b\u6e1b\u5c11\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\n\n### \u30ea\u30b9\u30c8()\u69cb\u6587\u3092\u4f7f\u3063\u305f\u591a\u91cd\u4ee3\u5165\u306e\u30c6\u30af\u30cb\u30c3\u30af\n\n\u30ea\u30b9\u30c8()\u69cb\u6587\uff08\u307e\u305f\u306fPHP 7.1\u4ee5\u964d\u306e\u77ed\u7e2e\u69cb\u6587`[]`\uff09\u3092\u4f7f\u3046\u3068\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u8907\u6570\u306e\u5909\u6570\u306b\u4e00\u5ea6\u306b\u4ee3\u5165\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u304c\u7c21\u6f54\u306b\u306a\u308a\u3001\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\n\n#### \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\n\n```php\n\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u304b\u3089\u306e\u591a\u91cd\u4ee3\u5165\n$info = [\"John Doe\", 30, \"john@example.com\"];\n\n\/\/ PHP 7.0\u4ee5\u524d\nlist($name, $age, $email) = $info;\n\n\/\/ PHP 7.1\u4ee5\u964d\u306e\u77ed\u7e2e\u69cb\u6587\n[$name, $age, $email] = $info;\n\necho \"\u540d\u524d: $name, \u5e74\u9f62: $age, \u30e1\u30fc\u30eb: $email\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-169\">\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u6307\u5b9a\u5206\u89e3\uff08PHP 7.1\u4ee5\u964d\uff09<\/h4>\n\n\n\n<p>PHP 7.1\u304b\u3089\u306f\u3001\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u3092\u6307\u5b9a\u3057\u3066\u5909\u6570\u306b\u4ee3\u5165\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"name\" =&gt; \"John Doe\",\n    \"age\" =&gt; 30,\n    \"email\" =&gt; \"john@example.com\"\n];\n\n\/\/ \u30ad\u30fc\u3092\u6307\u5b9a\u3057\u3066\u5024\u3092\u5909\u6570\u306b\u4ee3\u5165\n[\"name\" =&gt; $name, \"email\" =&gt; $email] = $user;\necho \"\u540d\u524d: $name, \u30e1\u30fc\u30eb: $email\\n\";\n\n\/\/ \u7570\u306a\u308b\u5909\u6570\u540d\u3092\u4f7f\u7528\n[\"name\" =&gt; $userName, \"age\" =&gt; $userAge] = $user;\necho \"\u30e6\u30fc\u30b6\u30fc\u540d: $userName, \u5e74\u9f62: $userAge\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-170\">\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u5206\u89e3<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u3082\u5206\u89e3\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$person = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"address\" =&gt; [\"city\" =&gt; \"Tokyo\", \"zip\" =&gt; \"100-0001\"]\n];\n\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u5206\u89e3\n[\"name\" =&gt; $name, \"address\" =&gt; [\"city\" =&gt; $city]] = $person;\necho \"$name \u306f $city \u306b\u4f4f\u3093\u3067\u3044\u307e\u3059\\n\";\n\n\/\/ \u3042\u308b\u3044\u306f\u4e00\u5ea6\u306b\u8907\u6570\u30ec\u30d9\u30eb\u3092\u5206\u89e3\n[\n    \"name\" =&gt; $name,\n    \"age\" =&gt; $age,\n    \"address\" =&gt; [\n        \"city\" =&gt; $city,\n        \"zip\" =&gt; $zip\n    ]\n] = $person;\necho \"$name ($age\u6b73) \u306f $zip $city \u306b\u4f4f\u3093\u3067\u3044\u307e\u3059\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-171\">foreach\u30eb\u30fc\u30d7\u5185\u3067\u306e\u30ea\u30b9\u30c8()\u306e\u4f7f\u7528<\/h4>\n\n\n\n<p>\u30ea\u30b9\u30c8()\u69cb\u6587\u306fforeach\u30eb\u30fc\u30d7\u5185\u3067\u3082\u4f7f\u7528\u3067\u304d\u3001\u3053\u308c\u306b\u3088\u308a\u591a\u6b21\u5143\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$students = [\n    [\"John\", \"Math\", 85],\n    [\"Jane\", \"Math\", 92],\n    [\"Bob\", \"Science\", 78],\n    [\"Alice\", \"Science\", 95]\n];\n\n\/\/ foreach\u3068\u30ea\u30b9\u30c8()\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\nforeach ($students as [$name, $subject, $score]) {\n    echo \"$name \u306e $subject \u306e\u5f97\u70b9: $score\\n\";\n}\n\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u9023\u60f3\u914d\u5217\u306e\u5834\u5408\n$users = [\n    [\"name\" =&gt; \"John\", \"scores\" =&gt; [\"math\" =&gt; 85, \"english\" =&gt; 90]],\n    [\"name\" =&gt; \"Jane\", \"scores\" =&gt; [\"math\" =&gt; 92, \"english\" =&gt; 88]]\n];\n\nforeach ($users as [\"name\" =&gt; $name, \"scores\" =&gt; [\"math\" =&gt; $mathScore, \"english\" =&gt; $englishScore]]) {\n    $average = ($mathScore + $englishScore) \/ 2;\n    echo \"$name \u306e\u5e73\u5747\u70b9: $average\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-172\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>CSV\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$csvLines = [\n    \"John,Doe,30,New York\",\n    \"Jane,Smith,25,London\",\n    \"Bob,Johnson,35,Tokyo\"\n];\n\nforeach ($csvLines as $line) {\n    [$firstName, $lastName, $age, $city] = explode(\",\", $line);\n    echo \"$firstName $lastName ($age) - $city\\n\";\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u8981\u7d20\u3092\u4ea4\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$a = 1;\n$b = 2;\n\n\/\/ \u4e00\u6642\u5909\u6570\u3092\u4f7f\u308f\u305a\u306b\u5024\u3092\u4ea4\u63db\n[$a, $b] = [$b, $a];\necho \"a: $a, b: $b\\n\"; \/\/ a: 2, b: 1\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u304b\u3089\u306e\u8907\u6570\u8fd4\u308a\u5024\u3092\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getUserInfo($userId) {\n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3059\u308b\u306a\u3069\u306e\u51e6\u7406\n    return [\"John Doe\", \"john@example.com\", [\"admin\", \"editor\"]];\n}\n\n\/\/ \u8907\u6570\u306e\u8fd4\u308a\u5024\u3092\u4e00\u5ea6\u306b\u5909\u6570\u306b\u4ee3\u5165\n[$name, $email, $roles] = getUserInfo(123);\necho \"\u540d\u524d: $name, \u30e1\u30fc\u30eb: $email, \u5f79\u5272: \" . implode(\", \", $roles) . \"\\n\";\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u6b63\u898f\u8868\u73fe\u306e\u30de\u30c3\u30c1\u30f3\u30b0\u7d50\u679c\u3092\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$date = \"2023-06-15\";\nif (preg_match('\/^(\\d{4})-(\\d{2})-(\\d{2})$\/', $date, $matches)) {\n    [, $year, $month, $day] = $matches;\n    echo \"\u5e74: $year, \u6708: $month, \u65e5: $day\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-173\">\u7570\u306a\u308b\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u6bd4\u8f03\u3068\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u30eb\u30fc\u30d7\u306b\u306f\u3001foreach\u4ee5\u5916\u306b\u3082\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u30eb\u30fc\u30d7\u69cb\u6587\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-174\">\u4e3b\u306a\u30eb\u30fc\u30d7\u69cb\u6587<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>foreach<\/strong>\uff1a\u3082\u3063\u3068\u3082\u8aad\u307f\u3084\u3059\u304f\u3001\u9023\u60f3\u914d\u5217\u306b\u6700\u9069<\/li>\n\n\n\n<li><strong>for<\/strong>\uff1a\u30ab\u30a6\u30f3\u30bf\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u308b<\/li>\n\n\n\n<li><strong>while<\/strong>\uff1a\u6761\u4ef6\u306b\u57fa\u3065\u3044\u305f\u30eb\u30fc\u30d7\u306b\u6700\u9069<\/li>\n\n\n\n<li><strong>do-while<\/strong>\uff1a\u5c11\u306a\u304f\u3068\u30821\u56de\u306f\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/li>\n\n\n\n<li><strong>array_map\/filter\/reduce<\/strong>\uff1a\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-175\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/h4>\n\n\n\n<p>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306b\u5bfe\u3057\u3066\u3001\u7570\u306a\u308b\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = range(1, 10000);\n\n\/\/ \u6642\u9593\u8a08\u6e2c\u7528\u306e\u95a2\u6570\nfunction timeIt($func) {\n    $start = microtime(true);\n    $func();\n    $end = microtime(true);\n    return $end - $start;\n}\n\n\/\/ foreach\n$foreachTime = timeIt(function() use ($array) {\n    $sum = 0;\n    foreach ($array as $value) {\n        $sum += $value;\n    }\n});\n\n\/\/ for\n$forTime = timeIt(function() use ($array) {\n    $sum = 0;\n    $count = count($array);\n    for ($i = 0; $i &lt; $count; $i++) {\n        $sum += $array[$i];\n    }\n});\n\n\/\/ while\n$whileTime = timeIt(function() use ($array) {\n    $sum = 0;\n    $i = 0;\n    $count = count($array);\n    while ($i &lt; $count) {\n        $sum += $array[$i];\n        $i++;\n    }\n});\n\n\/\/ array_reduce\n$reduceTime = timeIt(function() use ($array) {\n    $sum = array_reduce($array, function($carry, $item) {\n        return $carry + $item;\n    }, 0);\n});\n\necho \"foreach: {$foreachTime}\u79d2\\n\";\necho \"for: {$forTime}\u79d2\\n\";\necho \"while: {$whileTime}\u79d2\\n\";\necho \"array_reduce: {$reduceTime}\u79d2\\n\";\n<\/pre>\n\n\n\n<p>\u4e00\u822c\u7684\u306b\u3001\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3092\u5358\u7d14\u306b\u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u5834\u5408\u306f<code>for<\/code>\u30eb\u30fc\u30d7\u304c\u82e5\u5e72\u9ad8\u901f\u3067\u3059\u304c\u3001\u9023\u60f3\u914d\u5217\u306e\u5834\u5408\u306f<code>foreach<\/code>\u304c\u6700\u3082\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u6700\u8fd1\u306ePHP\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u9055\u3044\u306f\u307b\u3068\u3093\u3069\u7121\u8996\u3067\u304d\u308b\u30ec\u30d9\u30eb\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-176\">\u5404\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u4f7f\u3044\u5206\u3051<\/h4>\n\n\n<div id=\"id-0eb6c872-5534-4152-9053-e6f2e637fe43\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30eb\u30fc\u30d7\u69cb\u6587<\/th><th>\u6700\u9069\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>foreach<\/td><td>\u914d\u5217\u5168\u4f53\u3092\u9806\u306b\u51e6\u7406\u3059\u308b\u5834\u5408<\/td><td>\u8aad\u307f\u3084\u3059\u3044\u3001\u9023\u60f3\u914d\u5217\u306b\u6700\u9069<\/td><td>\u30ab\u30a6\u30f3\u30bf\u304c\u306a\u3044\u3001\u9014\u4e2d\u3067\u7d42\u4e86\u3057\u306b\u304f\u3044<\/td><\/tr><tr><td>for<\/td><td>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u4e00\u90e8\u306e\u8981\u7d20\u3060\u3051\u3092\u51e6\u7406\u3059\u308b\u5834\u5408<\/td><td>\u67d4\u8edf\u6027\u304c\u9ad8\u3044\u3001\u30ab\u30a6\u30f3\u30bf\u304c\u3042\u308b<\/td><td>\u9023\u60f3\u914d\u5217\u306b\u306f\u4e0d\u5411\u304d<\/td><\/tr><tr><td>while<\/td><td>\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u51e6\u7406\u3092\u7d42\u4e86\u3059\u308b\u5834\u5408<\/td><td>\u7d42\u4e86\u6761\u4ef6\u304c\u67d4\u8edf<\/td><td>\u7121\u9650\u30eb\u30fc\u30d7\u306e\u30ea\u30b9\u30af<\/td><\/tr><tr><td>do-while<\/td><td>\u5c11\u306a\u304f\u3068\u30821\u56de\u306f\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/td><td>\u521d\u56de\u5b9f\u884c\u304c\u4fdd\u8a3c\u3055\u308c\u308b<\/td><td>\u4f7f\u7528\u983b\u5ea6\u304c\u4f4e\u3044<\/td><\/tr><tr><td>array_* \u95a2\u6570<\/td><td>\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u5408<\/td><td>\u7c21\u6f54\u3001\u610f\u56f3\u304c\u660e\u78ba<\/td><td>\u30cd\u30b9\u30c8\u3057\u305f\u30ed\u30b8\u30c3\u30af\u306b\u306f\u4e0d\u5411\u304d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-177\">\u5927\u898f\u6a21\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\uff1a\u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf<\/h4>\n\n\n\n<p>\u975e\u5e38\u306b\u5927\u304d\u306a\u914d\u5217\uff08\u6570\u767e\u4e07\u4ef6\u306e\u30c7\u30fc\u30bf\u306a\u3069\uff09\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u3053\u3068\u306f\u975e\u52b9\u7387\u3067\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u3001SPL\u30a4\u30c6\u30ec\u30fc\u30bf\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>SPL\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u4f7f\u7528\u4f8b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u305a\u3064\u51e6\u7406\n$file = new SplFileObject(\"large_data.csv\");\n$file-&gt;setFlags(SplFileObject::READ_CSV);\n\nforeach ($file as $row) {\n    \/\/ \u5404\u884c\uff08CSV\uff09\u30921\u3064\u305a\u3064\u51e6\u7406\n    if ($row[0] !== null) { \/\/ \u7a7a\u884c\u3092\u30b9\u30ad\u30c3\u30d7\n        processRow($row);\n    }\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u305f\u9045\u5ef6\u8a55\u4fa1<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\nfunction readLargeCSV($filename) {\n    $handle = fopen($filename, 'r');\n    while (($row = fgetcsv($handle)) !== false) {\n        yield $row;\n    }\n    fclose($handle);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nforeach (readLargeCSV(\"huge_data.csv\") as $row) {\n    \/\/ \u5404\u884c\u30921\u3064\u305a\u3064\u51e6\u7406\n    processRow($row);\n}\n<\/pre>\n\n\n\n<p>\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306f\u3001\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u5c11\u3057\u305a\u3064\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u4ee3\u308f\u308a\u306b\u3001\u5fc5\u8981\u306a\u90e8\u5206\u3060\u3051\u3092\u9806\u6b21\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-178\">\u914d\u5217\u51e6\u7406\u306e\u6700\u9069\u5316\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u914d\u5217\u3068\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30d7\u5185\u3067\u306ecount()\u547c\u3073\u51fa\u3057\u3092\u907f\u3051\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\n$array = [1, 2, 3, 4, 5];\nfor ($i = 0; $i &lt; count($array); $i++) {\n    \/\/ count()\u304c\u6bce\u56de\u547c\u3073\u51fa\u3055\u308c\u308b\n}\n\n\/\/ \u826f\u3044\u4f8b\n$array = [1, 2, 3, 4, 5];\n$count = count($array);\nfor ($i = 0; $i &lt; $count; $i++) {\n    \/\/ count()\u306f1\u56de\u3060\u3051\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u9069\u5207\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u914d\u5217\u3092\u4e8b\u524d\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\nforeach ($largeArray as $item) {\n    if ($item['status'] === 'active') {\n        \/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u9805\u76ee\u3060\u3051\u3092\u51e6\u7406\n    }\n}\n\n\/\/ \u826f\u3044\u4f8b\n$activeItems = array_filter($largeArray, function($item) {\n    return $item['status'] === 'active';\n});\nforeach ($activeItems as $item) {\n    \/\/ \u3059\u3079\u3066\u306e\u9805\u76ee\u304c\u30a2\u30af\u30c6\u30a3\u30d6\n}\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u53c2\u7167\u6e21\u3057\u306f\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u4f7f\u7528\u3057\u3001\u4f7f\u7528\u5f8c\u306f\u89e3\u9664\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\u3092\u51e6\u7406\nforeach ($largeObjects as &amp;$object) {\n    $object-&gt;process();\n}\nunset($object); \/\/ \u53c2\u7167\u3092\u89e3\u9664\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u8981\u7d20\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\nfor ($i = 0; $i &lt; 1000; $i++) {\n    doSomething($complexArray['deeply']['nested']['value']);\n}\n\n\/\/ \u826f\u3044\u4f8b\n$cachedValue = $complexArray['deeply']['nested']['value'];\nfor ($i = 0; $i &lt; 1000; $i++) {\n    doSomething($cachedValue);\n}\n<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u5927\u304d\u306a\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u30c1\u30e3\u30f3\u30af\u5206\u5272\u3092\u691c\u8a0e\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$largeArray = range(1, 1000000);\n$chunks = array_chunk($largeArray, 1000);\n\nforeach ($chunks as $chunk) {\n    \/\/ 1000\u8981\u7d20\u305a\u3064\u51e6\u7406\n    processChunk($chunk);\n}\n<\/pre>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li><strong>\u53ef\u80fd\u306a\u9650\u308a\u914d\u5217\u64cd\u4f5c\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u3092\u6d3b\u7528\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff08\u624b\u52d5\u30eb\u30fc\u30d7\uff09\n$result = [];\nforeach ($array as $item) {\n    $result[] = strtoupper($item);\n}\n\n\/\/ \u826f\u3044\u4f8b\uff08\u7d44\u307f\u8fbc\u307f\u95a2\u6570\uff09\n$result = array_map('strtoupper', $array);\n<\/pre>\n\n\n\n<ol start=\"7\" class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30d7\u304c\u4e0d\u8981\u306a\u5834\u5408\u306f\u907f\u3051\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\n$sum = 0;\nforeach ($numbers as $number) {\n    $sum += $number;\n}\n\n\/\/ \u826f\u3044\u4f8b\n$sum = array_sum($numbers);\n<\/pre>\n\n\n\n<p>\u914d\u5217\u3068\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u6700\u9069\u5316\u306f\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u9069\u5207\u306a\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u9078\u629e\u3001\u53c2\u7167\u6e21\u3057\u306e\u6d3b\u7528\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u306b\u3088\u3063\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002## \u914d\u5217\u3068\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u6700\u9069\u5316<\/p>\n\n\n\n<p>\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u30eb\u30fc\u30d7\u69cb\u6587\u306e\u9078\u629e\u3068\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u306e\u9069\u7528\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001foreach\u30eb\u30fc\u30d7\u306e\u52b9\u7387\u7684\u306a\u4f7f\u3044\u65b9\u3001\u53c2\u7167\u6e21\u3057\u306b\u3088\u308b\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u3001\u30ea\u30b9\u30c8()\u69cb\u6587\u3092\u4f7f\u3063\u305f\u591a\u91cd\u4ee3\u5165\u306a\u3069\u3001\u914d\u5217\u51e6\u7406\u3092\u9ad8\u901f\u5316\u30fb\u52b9\u7387\u5316\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-179\">foreach\u6587\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406<\/h3>\n\n\n\n<p>foreach\u6587\u306f\u3001PHP\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u51e6\u7406\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-180\">\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5024\u306e\u307f\u3092\u53d6\u5f97\nforeach ($array as $value) {\n    \/\/ $value\u3092\u4f7f\u3063\u305f\u51e6\u7406\n}\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u3092\u53d6\u5f97\nforeach ($array as $key =&gt; $value) {\n    \/\/ $key\u3068$value\u3092\u4f7f\u3063\u305f\u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-181\">foreach\u6587\u306e\u7279\u5fb4\u3068\u5229\u70b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u3055\u3068\u53ef\u8aad\u6027<\/strong>: \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7ba1\u7406\u3084\u5883\u754c\u6761\u4ef6\u306e\u30c1\u30a7\u30c3\u30af\u304c\u4e0d\u8981<\/li>\n\n\n\n<li><strong>\u9023\u60f3\u914d\u5217\u3068\u306e\u89aa\u548c\u6027<\/strong>: \u6570\u5024\u6dfb\u5b57\u914d\u5217\u3068\u9023\u60f3\u914d\u5217\u306e\u4e21\u65b9\u306b\u540c\u3058\u69cb\u6587\u3067\u5bfe\u5fdc<\/li>\n\n\n\n<li><strong>\u578b\u306e\u81ea\u52d5\u51e6\u7406<\/strong>: \u914d\u5217\u5185\u306e\u7570\u306a\u308b\u578b\u306e\u8981\u7d20\u3092\u81ea\u7136\u306b\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u7570\u306a\u308b\u578b\u306e\u8981\u7d20\u3092\u6301\u3064\u914d\u5217\n$data = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30,\n    \"skills\" =&gt; [\"PHP\", \"JavaScript\", \"MySQL\"],\n    \"active\" =&gt; true\n];\n\nforeach ($data as $key =&gt; $value) {\n    echo \"$key: \";\n    if (is_array($value)) {\n        echo implode(\", \", $value);\n    } else {\n        echo $value;\n    }\n    echo \"\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-182\">foreach\u306e\u5185\u90e8\u52d5\u4f5c\u3092\u7406\u89e3\u3059\u308b<\/h4>\n\n\n\n<p>foreach\u30eb\u30fc\u30d7\u306f\u958b\u59cb\u6642\u306b\u914d\u5217\u306e\u5185\u90e8\u30dd\u30a4\u30f3\u30bf\u3092\u30ea\u30bb\u30c3\u30c8\u3057\u3001\u8981\u7d20\u3092\u9806\u756a\u306b\u51e6\u7406\u3057\u307e\u3059\u3002\u30eb\u30fc\u30d7\u7d42\u4e86\u5f8c\u3082\u5185\u90e8\u30dd\u30a4\u30f3\u30bf\u306f\u6700\u5f8c\u306e\u8981\u7d20\u3092\u6307\u3057\u305f\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [1, 2, 3, 4, 5];\n\n\/\/ \u73fe\u5728\u306e\u5185\u90e8\u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u7528\u3059\u308b\necho current($array); \/\/ 1\n\n\/\/ foreach\u30eb\u30fc\u30d7\u306e\u5b9f\u884c\nforeach ($array as $value) {\n    echo $value; \/\/ 12345\u3092\u9806\u756a\u306b\u51fa\u529b\n}\n\n\/\/ foreach\u30eb\u30fc\u30d7\u5f8c\u306e\u5185\u90e8\u30dd\u30a4\u30f3\u30bf\necho current($array); \/\/ false\u3092\u8fd4\u3059\uff08\u6700\u5f8c\u306e\u8981\u7d20\u306e\u6b21\u3092\u6307\u3057\u3066\u3044\u308b\u305f\u3081\uff09\n\n\/\/ \u30dd\u30a4\u30f3\u30bf\u3092\u30ea\u30bb\u30c3\u30c8\nreset($array);\necho current($array); \/\/ 1\n<\/pre>\n\n\n\n<p>\u3053\u306e\u305f\u3081\u3001foreach\u30eb\u30fc\u30d7\u5185\u3067reset()\u3001next()\u3001prev()\u306a\u3069\u306e\u30dd\u30a4\u30f3\u30bf\u64cd\u4f5c\u95a2\u6570\u3092\u4f7f\u3046\u3068\u3001\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-183\">\u30cd\u30b9\u30c8\u3057\u305f\u30eb\u30fc\u30d7\u3068\u914d\u5217<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u30cd\u30b9\u30c8\u3057\u305fforeach\u30eb\u30fc\u30d7\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$students = [\n    \"Class A\" =&gt; [\n        [\"name\" =&gt; \"John\", \"score\" =&gt; 85],\n        [\"name\" =&gt; \"Jane\", \"score\" =&gt; 92]\n    ],\n    \"Class B\" =&gt; [\n        [\"name\" =&gt; \"Bob\", \"score\" =&gt; 78],\n        [\"name\" =&gt; \"Alice\", \"score\" =&gt; 95]\n    ]\n];\n\n\/\/ \u30af\u30e9\u30b9\u3054\u3068\u306e\u5e73\u5747\u70b9\u3092\u8a08\u7b97\nforeach ($students as $className =&gt; $classStudents) {\n    $totalScore = 0;\n    $studentCount = count($classStudents);\n    \n    foreach ($classStudents as $student) {\n        $totalScore += $student[\"score\"];\n    }\n    \n    $average = $studentCount &gt; 0 ? $totalScore \/ $studentCount : 0;\n    echo \"$className \u306e\u5e73\u5747\u70b9: $average\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-184\">\u30d6\u30ec\u30fc\u30af\u51e6\u7406\u3068\u7d99\u7d9a\u51e6\u7406<\/h4>\n\n\n\n<p>foreach\u30eb\u30fc\u30d7\u5185\u3067\u306f\u3001<code>break<\/code>\u3084<code>continue<\/code>\u3092\u4f7f\u3063\u3066\u5236\u5fa1\u30d5\u30ed\u30fc\u3092\u8abf\u6574\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"name\" =&gt; \"John\", \"role\" =&gt; \"admin\"],\n    [\"name\" =&gt; \"Jane\", \"role\" =&gt; \"user\"],\n    [\"name\" =&gt; \"Bob\", \"role\" =&gt; \"editor\"],\n    [\"name\" =&gt; \"Alice\", \"role\" =&gt; \"admin\"]\n];\n\n\/\/ \u7ba1\u7406\u8005\u3092\u691c\u7d22\n$adminFound = false;\nforeach ($users as $user) {\n    if ($user[\"role\"] === \"admin\") {\n        echo \"\u7ba1\u7406\u8005\u304c\u898b\u3064\u304b\u308a\u307e\u3057\u305f: {$user[\"name\"]}\\n\";\n        $adminFound = true;\n        break; \/\/ \u6700\u521d\u306e\u7ba1\u7406\u8005\u304c\u898b\u3064\u304b\u3063\u305f\u3089\u30eb\u30fc\u30d7\u3092\u7d42\u4e86\n    }\n}\n\n\/\/ \u7ba1\u7406\u8005\u4ee5\u5916\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u8868\u793a\necho \"\u7ba1\u7406\u8005\u4ee5\u5916\u306e\u30e6\u30fc\u30b6\u30fc:\\n\";\nforeach ($users as $user) {\n    if ($user[\"role\"] === \"admin\") {\n        continue; \/\/ \u7ba1\u7406\u8005\u3092\u30b9\u30ad\u30c3\u30d7\n    }\n    echo \"- {$user[\"name\"]} ({$user[\"role\"]})\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-185\">\u53c2\u7167\u6e21\u3057\u306b\u3088\u308b\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u3084\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6271\u3046\u5834\u5408\u3001\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u3046\u3053\u3068\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-186\">\u53c2\u7167\u6e21\u3057\u306e\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5024\u306e\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\nforeach ($array as $value) {\n    \/\/ $value\u306f$array\u306e\u5404\u8981\u7d20\u306e\u30b3\u30d4\u30fc\n}\n\n\/\/ \u53c2\u7167\u3067\u5024\u3092\u53d6\u5f97\nforeach ($array as &amp;$value) {\n    \/\/ $value\u306f$array\u306e\u5404\u8981\u7d20\u3078\u306e\u53c2\u7167\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-187\">\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u3046\u4e3b\u306a\u72b6\u6cc1<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5927\u304d\u306a\u914d\u5217\u8981\u7d20\u306e\u51e6\u7406<\/strong>\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u5927\u304d\u306a\u914d\u5217\u3092\u542b\u3080\u8981\u7d20\u3092\u6271\u3046\u5834\u5408<\/li>\n\n\n\n<li><strong>\u5143\u306e\u914d\u5217\u3092\u5909\u66f4\u3059\u308b\u5834\u5408<\/strong>\uff1a\u30eb\u30fc\u30d7\u5185\u3067\u914d\u5217\u306e\u8981\u7d20\u3092\u76f4\u63a5\u5909\u66f4\u3057\u305f\u3044\u5834\u5408<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5024\u6e21\u3057 - \u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3055\u308c\u306a\u3044\n$numbers = [1, 2, 3, 4, 5];\nforeach ($numbers as $value) {\n    $value *= 2; \/\/ \u30ed\u30fc\u30ab\u30eb\u30b3\u30d4\u30fc\u3060\u3051\u304c\u5909\u66f4\u3055\u308c\u308b\n}\nprint_r($numbers); \/\/ [1, 2, 3, 4, 5] - \u5909\u66f4\u306a\u3057\n\n\/\/ \u53c2\u7167\u6e21\u3057 - \u5143\u306e\u914d\u5217\u304c\u5909\u66f4\u3055\u308c\u308b\n$numbers = [1, 2, 3, 4, 5];\nforeach ($numbers as &amp;$value) {\n    $value *= 2; \/\/ \u5143\u306e\u914d\u5217\u306e\u8981\u7d20\u304c\u5909\u66f4\u3055\u308c\u308b\n}\nprint_r($numbers); \/\/ [2, 4, 6, 8, 10] - \u5909\u66f4\u3055\u308c\u305f\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-188\">\u53c2\u7167\u6e21\u3057\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<p>\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u3046\u969b\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u843d\u3068\u3057\u7a74\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30d7\u5f8c\u3082\u53c2\u7167\u304c\u6b8b\u308b<\/strong>\uff1a\u5f8c\u7d9a\u306e\u30b3\u30fc\u30c9\u3067\u610f\u56f3\u3057\u306a\u3044\u5909\u66f4\u304c\u8d77\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\nforeach ($numbers as &amp;$value) {\n    $value *= 2;\n}\n\/\/ \u3053\u3053\u3067$value\u306f$numbers[4]\uff08\u6700\u5f8c\u306e\u8981\u7d20\uff09\u3078\u306e\u53c2\u7167\u306e\u307e\u307e\n\n\/\/ \u53c2\u7167\u3092\u89e3\u9664\u305b\u305a\u306b\u5225\u306e\u30eb\u30fc\u30d7\u3092\u5b9f\u884c\u3059\u308b\u3068...\nforeach ($numbers as $value) {\n    echo $value . \" \";\n}\n\/\/ \u6700\u5f8c\u306e\u8981\u7d20\u304c\u4e0a\u66f8\u304d\u3055\u308c\u308b\uff01\nprint_r($numbers); \/\/ [2, 4, 6, 8, 8] \u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\n\n\/\/ \u6b63\u3057\u3044\u4f7f\u3044\u65b9: \u53c2\u7167\u3092\u4f7f\u3063\u305f\u30eb\u30fc\u30d7\u306e\u5f8c\u306f\u53c2\u7167\u3092\u89e3\u9664\u3059\u308b\nunset($value);\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u53c2\u7167\u3068\u5024\u306e\u6df7\u540c<\/strong>\uff1a\u540c\u3058\u5909\u6570\u306b\u5bfe\u3057\u3066\u53c2\u7167\u6e21\u3057\u3068\u5024\u6e21\u3057\u3092\u6df7\u5728\u3055\u305b\u306a\u3044\u3053\u3068<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\n$array = [1, 2, 3];\nforeach ($array as &amp;$value) {\n    \/\/ \u53c2\u7167\u3068\u3057\u3066\u4f7f\u7528\n}\n\/\/ $value\u306e\u53c2\u7167\u3092\u89e3\u9664\u305b\u305a\u306b\nforeach ($array as $value) {\n    \/\/ \u5024\u3068\u3057\u3066\u4f7f\u7528\uff08\u6700\u5f8c\u306e\u8981\u7d20\u3078\u306e\u53c2\u7167\u304c\u4e0a\u66f8\u304d\u3055\u308c\u308b\uff09\n}\n\n\/\/ \u826f\u3044\u4f8b\n$array = [1, 2, 3];\nforeach ($array as &amp;$valueRef) {\n    \/\/ \u53c2\u7167\u3068\u3057\u3066\u4f7f\u7528\n}\nunset($valueRef); \/\/ \u53c2\u7167\u3092\u89e3\u9664\n\nforeach ($array as $value) {\n    \/\/ \u5024\u3068\u3057\u3066\u4f7f\u7528\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-189\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6bd4\u8f03<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u53c2\u7167\u6e21\u3057\u3068\u5024\u6e21\u3057\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u5927\u304d\u306a\u9055\u3044\u304c\u51fa\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u30c6\u30b9\u30c8\u3059\u308b\u95a2\u6570\nfunction testMemoryUsage($useReference) {\n    \/\/ \u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\u3092\u4f5c\u6210\n    $largeArray = [];\n    for ($i = 0; $i &lt; 1000; $i++) {\n        $largeArray[] = new stdClass();\n        $largeArray[$i]-&gt;data = str_repeat(\"x\", 1000); \/\/ \u5404\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b1KB\u306e\u30c7\u30fc\u30bf\n    }\n    \n    $memBefore = memory_get_usage();\n    \n    if ($useReference) {\n        \/\/ \u53c2\u7167\u6e21\u3057\u3067\u30eb\u30fc\u30d7\n        foreach ($largeArray as &amp;$item) {\n            $temp = $item-&gt;data;\n<\/pre>\n\n\n\n<p>$users = [ [\u201cname\u201d =&gt; \u201cJohn\u201d, \u201cpermissions\u201d =&gt; [\u201cread\u201d =&gt; true, \u201cwrite\u201d =&gt; true, \u201cdelete\u201d =&gt; true]], [\u201cname\u201d =&gt; \u201cJane\u201d, \u201cpermissions\u201d =&gt; [\u201cread\u201d =&gt; true, \u201cwrite\u201d =&gt; true, \u201cdelete\u201d =&gt; false]], [\u201cname\u201d =&gt; \u201cBob\u201d, \u201cpermissions\u201d =&gt; [\u201cread\u201d =&gt; true, \u201cwrite\u201d =&gt; false, \u201cdelete\u201d =&gt; false]] ];<\/p>\n\n\n\n<p>\/\/ \u524a\u9664\u6a29\u9650\u3092\u6301\u3064\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0 $admins = array_filter($users, function($user) { return $user[\u201cpermissions\u201d][\u201cdelete\u201d] === true; });<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n3. **array_walk_recursive()\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30fc\u30bf\u306e\u5909\u63db**\n\narray_walk_recursive()\u306f\u518d\u5e30\u7684\u306b\u914d\u5217\u306e\u672b\u7aef\u306e\u5024\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002\n\n```php\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u69cb\u9020\u5185\u306e\u7279\u5b9a\u578b\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\n$data = [\n    \"user\" =&gt; [\n        \"name\" =&gt; \"John Doe\",\n        \"settings\" =&gt; [\n            \"theme\" =&gt; \"dark\",\n            \"notifications\" =&gt; true,\n            \"fontSize\" =&gt; 14\n        ]\n    ],\n    \"preferences\" =&gt; [\n        \"language\" =&gt; \"en\",\n        \"timezone\" =&gt; \"UTC\"\n    ]\n];\n\n\/\/ \u5168\u3066\u306e\u6587\u5b57\u5217\u5024\u3092\u5927\u6587\u5b57\u306b\u5909\u63db\narray_walk_recursive($data, function(&amp;$value) {\n    if (is_string($value)) {\n        $value = strtoupper($value);\n    }\n});\n\/*\n\u7d50\u679c:\n[\n    \"user\" =&gt; [\n        \"name\" =&gt; \"JOHN DOE\",\n        \"settings\" =&gt; [\n            \"theme\" =&gt; \"DARK\",\n            \"notifications\" =&gt; true, \/\/ boolean\u306f\u5909\u66f4\u3055\u308c\u306a\u3044\n            \"fontSize\" =&gt; 14 \/\/ \u6570\u5024\u306f\u5909\u66f4\u3055\u308c\u306a\u3044\n        ]\n    ],\n    \"preferences\" =&gt; [\n        \"language\" =&gt; \"EN\",\n        \"timezone\" =&gt; \"UTC\"\n    ]\n]\n*\/\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30ab\u30b9\u30bf\u30e0\u518d\u5e30\u95a2\u6570\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<p>array_walk_recursive()\u306f\u914d\u5217\u306e\u30ad\u30fc\u3092\u4fdd\u6301\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u30ab\u30b9\u30bf\u30e0\u518d\u5e30\u95a2\u6570\u3092\u4f7f\u3048\u3070\u3088\u308a\u8907\u96d1\u306a\u64cd\u4f5c\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u591a\u6b21\u5143\u914d\u5217\u3092\u518d\u5e30\u7684\u306b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\n * \n * @param array $array \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u914d\u5217\n * @param callable $callback \u30d5\u30a3\u30eb\u30bf\u95a2\u6570(\u5024\u3001\u30ad\u30fc\u3001\u89aa\u30ad\u30fc\u306e\u30d1\u30b9\u3092\u53d7\u3051\u53d6\u308b)\n * @param array $path \u73fe\u5728\u306e\u89aa\u30ad\u30fc\u306e\u30d1\u30b9\n * @return array \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction array_filter_recursive($array, $callback, $path = []) {\n    $result = [];\n    \n    foreach ($array as $key =&gt; $value) {\n        $currentPath = array_merge($path, [$key]);\n        \n        if (is_array($value)) {\n            $filteredValue = array_filter_recursive($value, $callback, $currentPath);\n            if (!empty($filteredValue) || $callback($value, $key, $currentPath)) {\n                $result[$key] = $filteredValue;\n            }\n        } elseif ($callback($value, $key, $currentPath)) {\n            $result[$key] = $value;\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b: \u3059\u3079\u3066\u306e\u6570\u5024\u304c0\u3088\u308a\u5927\u304d\u3044\u8981\u7d20\u3060\u3051\u3092\u4fdd\u6301\n$data = [\n    \"scores\" =&gt; [\n        \"math\" =&gt; 85,\n        \"science\" =&gt; 92,\n        \"history\" =&gt; 78\n    ],\n    \"stats\" =&gt; [\n        \"wins\" =&gt; 10,\n        \"losses\" =&gt; 5,\n        \"draws\" =&gt; 0\n    ],\n    \"misc\" =&gt; [\n        \"name\" =&gt; \"John\",\n        \"active\" =&gt; true\n    ]\n];\n\n$filtered = array_filter_recursive($data, function($value, $key, $path) {\n    if (is_numeric($value)) {\n        return $value &gt; 0;\n    }\n    return true;\n});\n\/*\n\u7d50\u679c:\n[\n    \"scores\" =&gt; [\n        \"math\" =&gt; 85,\n        \"science\" =&gt; 92,\n        \"history\" =&gt; 78\n    ],\n    \"stats\" =&gt; [\n        \"wins\" =&gt; 10,\n        \"losses\" =&gt; 5\n        \/\/ \"draws\" =&gt; 0 \u306f\u9664\u5916\u3055\u308c\u308b\n    ],\n    \"misc\" =&gt; [\n        \"name\" =&gt; \"John\",\n        \"active\" =&gt; true\n    ]\n]\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-190\">\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u3092\u4f7f\u3063\u3066\u69d8\u3005\u306a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-191\">\u30c4\u30ea\u30fc\u69cb\u9020\u306e\u5b9f\u88c5\u3068\u64cd\u4f5c<\/h4>\n\n\n\n<p>\u968e\u5c64\u7684\u306a\u30c7\u30fc\u30bf\uff08\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u9020\u3001\u30ab\u30c6\u30b4\u30ea\u306a\u3069\uff09\u306f\u30c4\u30ea\u30fc\u69cb\u9020\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u30c4\u30ea\u30fc\u69cb\u9020\n$categories = [\n    \"Electronics\" =&gt; [\n        \"Computers\" =&gt; [\n            \"Laptops\" =&gt; [],\n            \"Desktops\" =&gt; [],\n            \"Tablets\" =&gt; []\n        ],\n        \"Mobile\" =&gt; [\n            \"Smartphones\" =&gt; [],\n            \"Accessories\" =&gt; [\n                \"Cases\" =&gt; [],\n                \"Chargers\" =&gt; []\n            ]\n        ]\n    ],\n    \"Books\" =&gt; [\n        \"Fiction\" =&gt; [\n            \"Sci-Fi\" =&gt; [],\n            \"Mystery\" =&gt; []\n        ],\n        \"Non-Fiction\" =&gt; []\n    ]\n];\n<\/pre>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c4\u30ea\u30fc\u306e\u518d\u5e30\u7684\u306a\u8868\u793a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c4\u30ea\u30fc\u69cb\u9020\u3092\u518d\u5e30\u7684\u306b\u8868\u793a\u3059\u308b\n * \n * @param array $tree \u30c4\u30ea\u30fc\u914d\u5217\n * @param int $level \u73fe\u5728\u306e\u6df1\u3055\u30ec\u30d9\u30eb\n *\/\nfunction displayTree($tree, $level = 0) {\n    foreach ($tree as $key =&gt; $subtree) {\n        echo str_repeat(\"  \", $level) . \"- $key\\n\";\n        if (!empty($subtree)) {\n            displayTree($subtree, $level + 1);\n        }\n    }\n}\n\ndisplayTree($categories);\n\/*\n\u51fa\u529b:\n- Electronics\n  - Computers\n    - Laptops\n    - Desktops\n    - Tablets\n  - Mobile\n    - Smartphones\n    - Accessories\n      - Cases\n      - Chargers\n- Books\n  - Fiction\n    - Sci-Fi\n    - Mystery\n  - Non-Fiction\n*\/\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c4\u30ea\u30fc\u306e\u691c\u7d22\u3068\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c4\u30ea\u30fc\u5185\u306e\u30d1\u30b9\u306b\u57fa\u3065\u3044\u3066\u30ce\u30fc\u30c9\u3092\u691c\u7d22\u3059\u308b\n * \n * @param array $tree \u30c4\u30ea\u30fc\u914d\u5217\n * @param array $path \u691c\u7d22\u30d1\u30b9\n * @return array|null \u898b\u3064\u304b\u3063\u305f\u30ce\u30fc\u30c9\u307e\u305f\u306fnull\n *\/\nfunction findNode($tree, $path) {\n    $current = $tree;\n    \n    foreach ($path as $step) {\n        if (!isset($current[$step])) {\n            return null;\n        }\n        $current = $current[$step];\n    }\n    \n    return $current;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$mobilePath = [\"Electronics\", \"Mobile\"];\n$mobileNode = findNode($categories, $mobilePath);\nprint_r($mobileNode);\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c4\u30ea\u30fc\u306e\u4fee\u6b63\u3068\u62e1\u5f35<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30d1\u30b9\u306b\u57fa\u3065\u3044\u3066\u30c4\u30ea\u30fc\u306b\u30ce\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\n * \n * @param array &amp;$tree \u30c4\u30ea\u30fc\u914d\u5217\uff08\u53c2\u7167\u6e21\u3057\uff09\n * @param array $path \u30d1\u30b9\n * @param mixed $value \u8ffd\u52a0\u3059\u308b\u5024\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction addNode(&amp;$tree, $path, $value) {\n    $current = &amp;$tree;\n    \n    foreach ($path as $step) {\n        if (!isset($current[$step])) {\n            $current[$step] = [];\n        }\n        $current = &amp;$current[$step];\n    }\n    \n    if (is_array($value)) {\n        foreach ($value as $key =&gt; $subvalue) {\n            $current[$key] = $subvalue;\n        }\n    } else {\n        $current = $value;\n    }\n    \n    return true;\n}\n\n\/\/ \u65b0\u3057\u3044\u30ab\u30c6\u30b4\u30ea\u3092\u8ffd\u52a0\naddNode($categories, [\"Electronics\", \"Audio\"], [\n    \"Headphones\" =&gt; [],\n    \"Speakers\" =&gt; []\n]);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-192\">\u30b0\u30e9\u30d5\u69cb\u9020\u306e\u8868\u73fe<\/h4>\n\n\n\n<p>\u9023\u7d50\u3055\u308c\u305f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\uff08\u30bd\u30fc\u30b7\u30e3\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001\u5730\u56f3\u306a\u3069\uff09\u306f\u30b0\u30e9\u30d5\u69cb\u9020\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6709\u5411\u30b0\u30e9\u30d5\u306e\u8868\u73fe\uff08\u96a3\u63a5\u30ea\u30b9\u30c8\uff09\n$graph = [\n    \"A\" =&gt; [\"B\" =&gt; 5, \"C\" =&gt; 3],  \/\/ A\u304b\u3089\u306f\u3001B\u3078\u30b3\u30b9\u30c85\u3001C\u3078\u30b3\u30b9\u30c83\u3067\u79fb\u52d5\u53ef\u80fd\n    \"B\" =&gt; [\"D\" =&gt; 2],            \/\/ B\u304b\u3089\u306f\u3001D\u3078\u30b3\u30b9\u30c82\u3067\u79fb\u52d5\u53ef\u80fd\n    \"C\" =&gt; [\"B\" =&gt; 1, \"D\" =&gt; 6],  \/\/ C\u304b\u3089\u306f\u3001B\u3078\u30b3\u30b9\u30c81\u3001D\u3078\u30b3\u30b9\u30c86\u3067\u79fb\u52d5\u53ef\u80fd\n    \"D\" =&gt; []                     \/\/ D\u304b\u3089\u306f\u3069\u3053\u306b\u3082\u79fb\u52d5\u3067\u304d\u306a\u3044\n];\n<\/pre>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b0\u30e9\u30d5\u306e\u63a2\u7d22\uff08\u5e45\u512a\u5148\u63a2\u7d22\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b0\u30e9\u30d5\u306e\u5e45\u512a\u5148\u63a2\u7d22\n * \n * @param array $graph \u30b0\u30e9\u30d5\u914d\u5217\n * @param string $start \u958b\u59cb\u30ce\u30fc\u30c9\n * @return array \u8a2a\u554f\u9806\u5e8f\n *\/\nfunction breadthFirstSearch($graph, $start) {\n    $queue = [$start];  \/\/ \u63a2\u7d22\u30ad\u30e5\u30fc\n    $visited = [$start =&gt; true];  \/\/ \u8a2a\u554f\u6e08\u307f\u30ce\u30fc\u30c9\n    $result = [];  \/\/ \u8a2a\u554f\u9806\u5e8f\n    \n    while (!empty($queue)) {\n        $node = array_shift($queue);\n        $result[] = $node;\n        \n        foreach (array_keys($graph[$node]) as $neighbor) {\n            if (!isset($visited[$neighbor])) {\n                $visited[$neighbor] = true;\n                $queue[] = $neighbor;\n            }\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$traversalOrder = breadthFirstSearch($graph, \"A\");\nprint_r($traversalOrder);  \/\/ [\"A\", \"B\", \"C\", \"D\"]\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\uff08\u6700\u77ed\u7d4c\u8def\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c0\u30a4\u30af\u30b9\u30c8\u30e9\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u6700\u77ed\u7d4c\u8def\u3092\u6c42\u3081\u308b\n * \n * @param array $graph \u30b0\u30e9\u30d5\u914d\u5217\n * @param string $start \u958b\u59cb\u30ce\u30fc\u30c9\n * @param string $end \u7d42\u4e86\u30ce\u30fc\u30c9\n * @return array \u6700\u77ed\u7d4c\u8def\u3068\u30b3\u30b9\u30c8\n *\/\nfunction dijkstra($graph, $start, $end) {\n    $distances = [];\n    $previous = [];\n    $nodes = [];\n    \n    \/\/ \u521d\u671f\u5316\n    foreach (array_keys($graph) as $node) {\n        $distances[$node] = INF;\n        $previous[$node] = null;\n        $nodes[] = $node;\n    }\n    $distances[$start] = 0;\n    \n    while (!empty($nodes)) {\n        \/\/ \u6700\u3082\u8ddd\u96e2\u304c\u77ed\u3044\u30ce\u30fc\u30c9\u3092\u53d6\u5f97\n        $minDistance = INF;\n        $closest = null;\n        foreach ($nodes as $i =&gt; $node) {\n            if ($distances[$node] &lt; $minDistance) {\n                $minDistance = $distances[$node];\n                $closest = $i;\n            }\n        }\n        \n        if ($closest === null) {\n            break;  \/\/ \u5230\u9054\u4e0d\u80fd\n        }\n        \n        $current = $nodes[$closest];\n        unset($nodes[$closest]);  \/\/ \u51e6\u7406\u6e08\u307f\u3068\u3057\u3066\u30de\u30fc\u30af\n        \n        if ($current === $end) {\n            break;  \/\/ \u76ee\u7684\u5730\u306b\u5230\u9054\n        }\n        \n        \/\/ \u96a3\u63a5\u30ce\u30fc\u30c9\u306e\u8ddd\u96e2\u3092\u66f4\u65b0\n        foreach ($graph[$current] as $neighbor =&gt; $cost) {\n            $alt = $distances[$current] + $cost;\n            if ($alt &lt; $distances[$neighbor]) {\n                $distances[$neighbor] = $alt;\n                $previous[$neighbor] = $current;\n            }\n        }\n    }\n    \n    \/\/ \u7d4c\u8def\u306e\u69cb\u7bc9\n    $path = [];\n    $current = $end;\n    while ($current !== null) {\n        array_unshift($path, $current);\n        $current = $previous[$current];\n    }\n    \n    return [\n        'path' =&gt; $path,\n        'cost' =&gt; $distances[$end]\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$result = dijkstra($graph, \"A\", \"D\");\necho \"\u6700\u77ed\u7d4c\u8def: \" . implode(\" -&gt; \", $result['path']) . \"\\n\";\necho \"\u7dcf\u30b3\u30b9\u30c8: \" . $result['cost'] . \"\\n\";\n\/\/ \"A -&gt; C -&gt; B -&gt; D\" (\u30b3\u30b9\u30c86)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-193\">\u30de\u30c8\u30ea\u30c3\u30af\u30b9\uff08\u884c\u5217\uff09\u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/h4>\n\n\n\n<p>\u4e8c\u6b21\u5143\u306e\u8868\u5f62\u5f0f\u30c7\u30fc\u30bf\u306f\u3001\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u3068\u3057\u3066\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6210\u7e3e\u30de\u30c8\u30ea\u30c3\u30af\u30b9 [\u751f\u5f92][\u79d1\u76ee]\n$grades = [\n    [\"Math\" =&gt; 85, \"Science\" =&gt; 92, \"English\" =&gt; 78],\n    [\"Math\" =&gt; 90, \"Science\" =&gt; 85, \"English\" =&gt; 95],\n    [\"Math\" =&gt; 78, \"Science\" =&gt; 88, \"English\" =&gt; 90]\n];\n<\/pre>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u8ee2\u7f6e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30de\u30c8\u30ea\u30c3\u30af\u30b9\u3092\u8ee2\u7f6e\u3059\u308b\uff08\u884c\u3068\u5217\u3092\u5165\u308c\u66ff\u3048\u308b\uff09\n * \n * @param array $matrix \u5143\u306e\u30de\u30c8\u30ea\u30c3\u30af\u30b9\n * @return array \u8ee2\u7f6e\u3055\u308c\u305f\u30de\u30c8\u30ea\u30c3\u30af\u30b9\n *\/\nfunction transposeMatrix($matrix) {\n    $result = [];\n    \n    \/\/ \u3059\u3079\u3066\u306e\u30ad\u30fc\u3092\u53ce\u96c6\n    $allKeys = [];\n    foreach ($matrix as $row) {\n        $allKeys = array_merge($allKeys, array_keys($row));\n    }\n    $allKeys = array_unique($allKeys);\n    \n    \/\/ \u8ee2\u7f6e\u3092\u5b9f\u884c\n    foreach ($allKeys as $key) {\n        $result[$key] = [];\n        foreach ($matrix as $i =&gt; $row) {\n            $result[$key][$i] = $row[$key] ?? null;\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u5143\u306e\u30de\u30c8\u30ea\u30c3\u30af\u30b9: \u751f\u5f92 \u00d7 \u79d1\u76ee\n\/\/ \u8ee2\u7f6e\u5f8c: \u79d1\u76ee \u00d7 \u751f\u5f92\n$bySubject = transposeMatrix($grades);\n\/*\n\u7d50\u679c:\n[\n    \"Math\" =&gt; [85, 90, 78],\n    \"Science\" =&gt; [92, 85, 88],\n    \"English\" =&gt; [78, 95, 90]\n]\n*\/\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u96c6\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u79d1\u76ee\u3054\u3068\u306e\u5e73\u5747\u70b9\u3092\u8a08\u7b97\n$subjectAverages = [];\nforeach ($bySubject as $subject =&gt; $scores) {\n    $subjectAverages[$subject] = array_sum($scores) \/ count($scores);\n}\n\/*\n\u7d50\u679c:\n[\n    \"Math\" =&gt; 84.33...,\n    \"Science\" =&gt; 88.33...,\n    \"English\" =&gt; 87.66...\n]\n*\/\n\n\/\/ \u751f\u5f92\u3054\u3068\u306e\u5408\u8a08\u70b9\u3068\u5e73\u5747\u70b9\u3092\u8a08\u7b97\n$studentStats = [];\nforeach ($grades as $i =&gt; $studentGrades) {\n    $total = array_sum($studentGrades);\n    $avg = $total \/ count($studentGrades);\n    $studentStats[$i] = [\n        \"total\" =&gt; $total,\n        \"average\" =&gt; $avg\n    ];\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-194\">\u81ea\u5df1\u53c2\u7167\u578b\u30c7\u30fc\u30bf\u69cb\u9020<\/h4>\n\n\n\n<p>\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u306e\u95a2\u4fc2\u3084\u30c4\u30ea\u30fc\u69cb\u9020\u306f\u3001\u81ea\u5df1\u53c2\u7167\u578b\u306e\u591a\u6b21\u5143\u914d\u5217\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u696d\u54e1\u306e\u968e\u5c64\u69cb\u9020\uff08\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u95a2\u4fc2\uff09\n$employees = [\n    101 =&gt; [\"name\" =&gt; \"John Smith\", \"title\" =&gt; \"CEO\", \"manager\" =&gt; null],\n    102 =&gt; [\"name\" =&gt; \"Jane Doe\", \"title\" =&gt; \"CTO\", \"manager\" =&gt; 101],\n    103 =&gt; [\"name\" =&gt; \"Bob Johnson\", \"title\" =&gt; \"Developer\", \"manager\" =&gt; 102],\n    104 =&gt; [\"name\" =&gt; \"Alice Brown\", \"title\" =&gt; \"Developer\", \"manager\" =&gt; 102],\n    105 =&gt; [\"name\" =&gt; \"Charlie Davis\", \"title\" =&gt; \"Designer\", \"manager\" =&gt; 101]\n];\n<\/pre>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7ba1\u7406\u968e\u5c64\u306e\u8868\u793a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u7ba1\u7406\u968e\u5c64\u3092\u8868\u793a\u3059\u308b\n * \n * @param array $employees \u5f93\u696d\u54e1\u30c7\u30fc\u30bf\n * @param int|null $managerId \u8868\u793a\u3059\u308b\u30de\u30cd\u30fc\u30b8\u30e3\u30fcID\uff08null\u306f\u6700\u4e0a\u4f4d\uff09\n * @param int $level \u30a4\u30f3\u30c7\u30f3\u30c8\u30ec\u30d9\u30eb\n *\/\nfunction displayHierarchy($employees, $managerId = null, $level = 0) {\n    \/\/ \u3053\u306e\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306e\u76f4\u5c5e\u306e\u90e8\u4e0b\u3092\u898b\u3064\u3051\u308b\n    $subordinates = array_filter($employees, function($emp) use ($managerId) {\n        return $emp[\"manager\"] === $managerId;\n    });\n    \n    foreach ($subordinates as $id =&gt; $employee) {\n        echo str_repeat(\"  \", $level) . \"- {$employee['name']} ({$employee['title']})\\n\";\n        \/\/ \u518d\u5e30\u7684\u306b\u90e8\u4e0b\u306e\u90e8\u4e0b\u3092\u8868\u793a\n        displayHierarchy($employees, $id, $level + 1);\n    }\n}\n\ndisplayHierarchy($employees);\n\/*\n\u51fa\u529b:\n- John Smith (CEO)\n  - Jane Doe (CTO)\n    - Bob Johnson (Developer)\n    - Alice Brown (Developer)\n  - Charlie Davis (Designer)\n*\/\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7279\u5b9a\u306e\u5f93\u696d\u54e1\u306e\u5168\u4e0a\u53f8\u3092\u53d6\u5f97<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u3042\u308b\u5f93\u696d\u54e1\u306e\u4e0a\u53f8\u30c1\u30a7\u30fc\u30f3\u3092\u53d6\u5f97\u3059\u308b\n * \n * @param array $employees \u5f93\u696d\u54e1\u30c7\u30fc\u30bf\n * @param int $employeeId \u5f93\u696d\u54e1ID\n * @return array \u4e0a\u53f8\u306eID\u30ea\u30b9\u30c8\uff08\u76f4\u5c5e\u306e\u4e0a\u53f8\u304b\u3089\u9806\u306b\uff09\n *\/\nfunction getManagerChain($employees, $employeeId) {\n    $chain = [];\n    $current = $employeeId;\n    \n    while (isset($employees[$current]) &amp;&amp; $employees[$current][\"manager\"] !== null) {\n        $current = $employees[$current][\"manager\"];\n        $chain[] = $current;\n    }\n    \n    return $chain;\n}\n\n\/\/ Bob\u306e\u4e0a\u53f8\u30c1\u30a7\u30fc\u30f3\u3092\u53d6\u5f97\n$bobsManagers = getManagerChain($employees, 103);\n$managerNames = [];\nforeach ($bobsManagers as $id) {\n    $managerNames[] = $employees[$id][\"name\"];\n}\necho \"Bob's managers: \" . implode(\" -&gt; \", $managerNames);\n\/\/ \"Jane Doe -&gt; John Smith\"\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-195\">\u591a\u6b21\u5143\u914d\u5217\u306e\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u3082\u306e\u3092\u6271\u3046\u5834\u5408\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u8003\u616e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-196\">\u30cd\u30b9\u30c8\u306e\u6df1\u3055\u3092\u5236\u9650\u3059\u308b<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6d45\u3044\u30cd\u30b9\u30c8<\/strong>: \u591a\u6b21\u5143\u914d\u5217\u306f3\u301c4\u30ec\u30d9\u30eb\u4ee5\u4e0a\u306e\u30cd\u30b9\u30c8\u3092\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002\u6df1\u3059\u304e\u308b\u30cd\u30b9\u30c8\u306f\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4e21\u65b9\u3092\u640d\u306a\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff08\u6df1\u3059\u304e\u308b\u30cd\u30b9\u30c8\uff09\n$data = [\n    \"user\" =&gt; [\n        \"profile\" =&gt; [\n            \"contact\" =&gt; [\n                \"address\" =&gt; [\n                    \"home\" =&gt; [\n                        \"street\" =&gt; \"123 Main St\",\n                        \"city\" =&gt; \"Anytown\"\n                    ]\n                ]\n            ]\n        ]\n    ]\n];\n\n\/\/ \u826f\u3044\u4f8b\uff08\u30d5\u30e9\u30c3\u30c8\u5316\uff09\n$data = [\n    \"user_profile_contact_address_home_street\" =&gt; \"123 Main St\",\n    \"user_profile_contact_address_home_city\" =&gt; \"Anytown\"\n];\n\n\/\/ \u307e\u305f\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30a2\u30d7\u30ed\u30fc\u30c1\nclass Address {\n    public $street;\n    public $city;\n}\n\nclass User {\n    public $name;\n    public $homeAddress;\n}\n\n$user = new User();\n$user-&gt;homeAddress = new Address();\n$user-&gt;homeAddress-&gt;street = \"123 Main St\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-197\">\u53c2\u7167\u3068\u5024\u306e\u30b3\u30d4\u30fc\u306e\u4f7f\u3044\u5206\u3051<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8<\/strong>: \u5927\u304d\u306a\u591a\u6b21\u5143\u914d\u5217\u3092\u95a2\u6570\u306b\u6e21\u3059\u5834\u5408\u306f\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u53c2\u7167\u6e21\u3057\uff08\u52b9\u7387\u7684\uff09\nfunction processLargeArray(&amp;$data) {\n    \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\n}\n\n\/\/ \u5024\u6e21\u3057\uff08\u975e\u52b9\u7387\uff09\nfunction processLargeArrayCopy($data) {\n    \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\uff08\u914d\u5217\u304c\u30b3\u30d4\u30fc\u3055\u308c\u308b\uff09\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-198\">\u518d\u5e30\u51e6\u7406\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306e\u518d\u5e30\u7684\u51e6\u7406\u306f\u3001\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u518d\u5e30\uff08\u5927\u304d\u3059\u304e\u308b\u30c7\u30fc\u30bf\u3067\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff09\nfunction recursiveProcess($data) {\n    foreach ($data as $key =&gt; $value) {\n        if (is_array($value)) {\n            recursiveProcess($value); \/\/ \u7121\u9650\u306b\u6df1\u304f\u306a\u308b\u53ef\u80fd\u6027\n        } else {\n            \/\/ \u51e6\u7406\n        }\n    }\n}\n\n\/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u305f\u6700\u9069\u5316\nfunction iterativeProcess($data) {\n    $stack = [[$data, []]]; \/\/ [\u30c7\u30fc\u30bf, \u30d1\u30b9]\n    \n    while (!empty($stack)) {\n        [$current, $path] = array_pop($stack);\n        \n        foreach ($current as $key =&gt; $value) {\n            $currentPath = array_merge($path, [$key]);\n            \n            if (is_array($value)) {\n                $stack[] = [$value, $currentPath];\n            } else {\n                \/\/ $value\u3092$currentPath\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u51e6\u7406\n            }\n        }\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-199\">\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u591a\u6b21\u5143\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8a08\u7b97\u7d50\u679c\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\n$categoryTreeCache = [];\n\nfunction getCategoryTree($categoryId) {\n    global $categoryTreeCache;\n    \n    if (isset($categoryTreeCache[$categoryId])) {\n        return $categoryTreeCache[$categoryId];\n    }\n    \n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3059\u308b\u306a\u3069\u306e\u51e6\u7406\n    $tree = fetchCategoryTreeFromDatabase($categoryId);\n    \n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\n    $categoryTreeCache[$categoryId] = $tree;\n    \n    return $tree;\n}\n<\/pre>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306f\u3001PHP\u3067\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u306b\u306f\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3068\u30d1\u30bf\u30fc\u30f3\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u8a2d\u8a08\u3068\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u64cd\u4f5c\u3082\u30af\u30ea\u30fc\u30f3\u3067\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP7\/8\u3067\u8ffd\u52a0\u3055\u308c\u305f\u914d\u5217\u95a2\u9023\u306e\u65b0\u6a5f\u80fd\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002## \u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u65b9\u6cd5<\/p>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306f\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b\u306b\u306f\u7279\u5225\u306a\u30c6\u30af\u30cb\u30c3\u30af\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u591a\u6b21\u5143\u914d\u5217\u306e\u30a2\u30af\u30bb\u30b9\u3001\u30bd\u30fc\u30c8\u3001\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3001\u304a\u3088\u3073\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-200\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u30fb\u8a2d\u5b9a\u3059\u308b\u969b\u306b\u306f\u3001\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u3068\u69cb\u9020\u8a2d\u8a08\u306e\u4e21\u9762\u3067\u6700\u9069\u5316\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-201\">\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u69cb\u6587<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u591a\u6b21\u5143\u914d\u5217\n$userData = [\n    \"personal\" =&gt; [\n        \"name\" =&gt; \"John Doe\",\n        \"age\" =&gt; 30,\n        \"contact\" =&gt; [\n            \"email\" =&gt; \"john@example.com\",\n            \"phone\" =&gt; \"123-456-7890\"\n        ]\n    ],\n    \"professional\" =&gt; [\n        \"title\" =&gt; \"Software Engineer\",\n        \"skills\" =&gt; [\"PHP\", \"JavaScript\", \"SQL\"]\n    ]\n];\n<\/pre>\n\n\n\n<p>\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u8003\u616e\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7e70\u308a\u8fd4\u3057\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5024\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u65b9\u6cd5\nfor ($i = 0; $i &lt; 100; $i++) {\n    echo $userData[\"personal\"][\"contact\"][\"email\"]; \/\/ \u6bce\u56de3\u6bb5\u968e\u306e\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u767a\u751f\n}\n\n\/\/ \u52b9\u7387\u7684\u306a\u65b9\u6cd5\n$email = $userData[\"personal\"][\"contact\"][\"email\"]; \/\/ 1\u56de\u3060\u3051\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\nfor ($i = 0; $i &lt; 100; $i++) {\n    echo $email;\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>null\u5408\u4f53\u6f14\u7b97\u5b50(<code>??<\/code>)\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.0\u4ee5\u964d\u3067\u5229\u7528\u53ef\u80fd\u306a\u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\n$fax = $userData[\"personal\"][\"contact\"][\"fax\"] ?? \"\u672a\u8a2d\u5b9a\";\n\n\/\/ \u540c\u7b49\u306e\u53e4\u3044\u66f8\u304d\u65b9\n$fax = isset($userData[\"personal\"][\"contact\"][\"fax\"])\n    ? $userData[\"personal\"][\"contact\"][\"fax\"]\n    : \"\u672a\u8a2d\u5b9a\";\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5b58\u5728\u78ba\u8a8d\u3068\u8907\u96d1\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u30ec\u30d9\u30eb\u306e\u5b58\u5728\u78ba\u8a8d\n$mobile = isset($userData[\"personal\"][\"contact\"][\"mobile\"])\n    ? $userData[\"personal\"][\"contact\"][\"mobile\"]\n    : (isset($userData[\"personal\"][\"contact\"][\"phone\"])\n        ? $userData[\"personal\"][\"contact\"][\"phone\"]\n        : \"\u9023\u7d61\u5148\u306a\u3057\");\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u53ef\u80fd\u306a\u9650\u308a\u5909\u6570\u5c55\u958b\u3092\u4f7f\u7528\u3059\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$section = \"personal\";\n$field = \"contact\";\n\n\/\/ \u52d5\u7684\u30ad\u30fc\u3067\u306e\u30a2\u30af\u30bb\u30b9\n$contact = $userData[$section][$field]; \/\/ $userData[\"personal\"][\"contact\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-202\">\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30d8\u30eb\u30d1\u30fc\u95a2\u6570<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u5b89\u5168\u306b\u5024\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u4f5c\u6210\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u5b89\u5168\u306b\u5024\u3092\u53d6\u5f97\u3059\u308b\n *\n * @param array $array \u5bfe\u8c61\u306e\u914d\u5217\n * @param array|string $path \u30ad\u30fc\u306e\u30d1\u30b9\uff08\u914d\u5217\u307e\u305f\u306f\u533a\u5207\u308a\u6587\u5b57\u3092\u542b\u3080\u6587\u5b57\u5217\uff09\n * @param mixed $default \u5024\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n * @return mixed \u898b\u3064\u304b\u3063\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n *\/\nfunction array_get($array, $path, $default = null) {\n    \/\/ \u30d1\u30b9\u304c\u6587\u5b57\u5217\u306a\u3089\u914d\u5217\u306b\u5909\u63db\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    \/\/ \u7a7a\u306e\u914d\u5217\u3084\u975e\u914d\u5217\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\n    if (!is_array($array)) {\n        return $default;\n    }\n    \n    \/\/ \u6b8b\u308a\u306e\u30d1\u30b9\u304c\u306a\u3051\u308c\u3070\u914d\u5217\u81ea\u4f53\u3092\u8fd4\u3059\n    if (empty($path)) {\n        return $array;\n    }\n    \n    \/\/ \u6700\u521d\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n    $key = array_shift($path);\n    \n    \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\n    if (!isset($array[$key])) {\n        return $default;\n    }\n    \n    \/\/ \u6b8b\u308a\u306e\u30d1\u30b9\u304c\u3042\u308b\u5834\u5408\u306f\u518d\u5e30\u7684\u306b\u51e6\u7406\n    if (!empty($path)) {\n        return array_get($array[$key], $path, $default);\n    }\n    \n    return $array[$key];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$email = array_get($userData, 'personal.contact.email', '\u30e1\u30fc\u30eb\u306a\u3057');\n$skills = array_get($userData, ['professional', 'skills'], []);\n$fax = array_get($userData, 'personal.contact.fax', '\u672a\u8a2d\u5b9a');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-203\">\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u5bfe\u3059\u308b\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/h4>\n\n\n\n<p>\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u591a\u6b21\u5143\u914d\u5217\u3067\u306f\u3001\u9014\u4e2d\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u9632\u3050\u306b\u306f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\n$value = $data['user']['settings']['notifications']['email'];\n\/\/ 'settings'\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\n\n\/\/ \u9632\u5fa1\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\n$value = isset($data['user']) &amp;&amp; isset($data['user']['settings']) &amp;&amp;\n         isset($data['user']['settings']['notifications']) &amp;&amp;\n         isset($data['user']['settings']['notifications']['email'])\n    ? $data['user']['settings']['notifications']['email']\n    : $default;\n\n\/\/ PHP 7.0\u4ee5\u964d\u306e\u3088\u308a\u7c21\u6f54\u306a\u65b9\u6cd5\n$value = $data['user']['settings']['notifications']['email'] ?? $default;\n\n\/\/ \u3057\u304b\u3057\u3001\u3053\u308c\u3067\u3082\u9014\u4e2d\u306e\u30ad\u30fc\u304c\u306a\u3044\u5834\u5408\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308b\n\/\/ \u6700\u3082\u5b89\u5168\u306a\u65b9\u6cd5\u306f\u524d\u8ff0\u306earray_get()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-204\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h3>\n\n\n\n<p>\u8907\u96d1\u306a\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3084\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u3001\u5358\u4e00\u306e\u914d\u5217\u3088\u308a\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-205\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>usort()\u3092\u4f7f\u7528\u3057\u305f\u8907\u96d1\u306a\u30bd\u30fc\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"role\" =&gt; \"admin\"],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 25, \"role\" =&gt; \"user\"],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 30, \"role\" =&gt; \"editor\"],\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 25, \"role\" =&gt; \"admin\"]\n];\n\n\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u30bd\u30fc\u30c8\uff08\u5f79\u5272\u3001\u5e74\u9f62\u3001\u540d\u524d\u306e\u9806\uff09\nusort($users, function($a, $b) {\n    \/\/ 1. \u307e\u305a\u5f79\u5272\u3067\u30bd\u30fc\u30c8\uff08\u7ba1\u7406\u8005\u304c\u5148\uff09\n    $roleOrder = [\"admin\" =&gt; 1, \"editor\" =&gt; 2, \"user\" =&gt; 3];\n    $roleComparison = $roleOrder[$a[\"role\"]] &lt;=&gt; $roleOrder[$b[\"role\"]];\n    if ($roleComparison !== 0) {\n        return $roleComparison;\n    }\n    \n    \/\/ 2. \u5f79\u5272\u304c\u540c\u3058\u306a\u3089\u5e74\u9f62\u3067\u30bd\u30fc\u30c8\uff08\u82e5\u3044\u9806\uff09\n    $ageComparison = $a[\"age\"] &lt;=&gt; $b[\"age\"];\n    if ($ageComparison !== 0) {\n        return $ageComparison;\n    }\n    \n    \/\/ 3. \u5e74\u9f62\u3082\u540c\u3058\u306a\u3089\u540d\u524d\u3067\u30bd\u30fc\u30c8\uff08\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\uff09\n    return $a[\"name\"] &lt;=&gt; $b[\"name\"];\n});\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>array_multisort()\u3092\u4f7f\u7528\u3057\u305f\u5217\u30d9\u30fc\u30b9\u306e\u30bd\u30fc\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    [\"id\" =&gt; 101, \"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"stock\" =&gt; 5],\n    [\"id\" =&gt; 102, \"name\" =&gt; \"Phone\", \"price\" =&gt; 800, \"stock\" =&gt; 10],\n    [\"id\" =&gt; 103, \"name\" =&gt; \"Tablet\", \"price\" =&gt; 500, \"stock\" =&gt; 2],\n    [\"id\" =&gt; 104, \"name\" =&gt; \"Monitor\", \"price\" =&gt; 300, \"stock\" =&gt; 15]\n];\n\n\/\/ \u5728\u5eab\u6570\uff08\u964d\u9806\uff09\u3068\u4fa1\u683c\uff08\u6607\u9806\uff09\u3067\u30bd\u30fc\u30c8\n$stock = array_column($products, 'stock');\n$price = array_column($products, 'price');\n\narray_multisort(\n    $stock, SORT_DESC,  \/\/ \u7b2c1\u30bd\u30fc\u30c8\u30ad\u30fc\n    $price, SORT_ASC,   \/\/ \u7b2c2\u30bd\u30fc\u30c8\u30ad\u30fc\n    $products           \/\/ \u30bd\u30fc\u30c8\u5bfe\u8c61\u306e\u914d\u5217\n);\n\n\/*\n\u7d50\u679c:\n[\n    [\"id\" =&gt; 104, \"name\" =&gt; \"Monitor\", \"price\" =&gt; 300, \"stock\" =&gt; 15],\n    [\"id\" =&gt; 102, \"name\" =&gt; \"Phone\", \"price\" =&gt; 800, \"stock\" =&gt; 10],\n    [\"id\" =&gt; 101, \"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"stock\" =&gt; 5],\n    [\"id\" =&gt; 103, \"name\" =&gt; \"Tablet\", \"price\" =&gt; 500, \"stock\" =&gt; 2]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-206\">\u591a\u6b21\u5143\u914d\u5217\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>array_filter()\u3092\u4f7f\u7528\u3057\u305f\u57fa\u672c\u7684\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    [\"id\" =&gt; 101, \"name\" =&gt; \"Laptop\", \"price\" =&gt; 1200, \"category\" =&gt; \"electronics\"],\n    [\"id\" =&gt; 102, \"name\" =&gt; \"T-shirt\", \"price\" =&gt; 25, \"category\" =&gt; \"clothing\"],\n    [\"id\" =&gt; 103, \"name\" =&gt; \"Coffee Maker\", \"price\" =&gt; 150, \"category\" =&gt; \"home\"],\n    [\"id\" =&gt; 104, \"name\" =&gt; \"Smartphone\", \"price\" =&gt; 800, \"category\" =&gt; \"electronics\"]\n];\n\n\/\/ \u96fb\u5b50\u6a5f\u5668\u30ab\u30c6\u30b4\u30ea\u30fc\u306e\u5546\u54c1\u3060\u3051\u3092\u53d6\u308a\u51fa\u3059\n$electronics = array_filter($products, function($product) {\n    return $product[\"category\"] === \"electronics\";\n});\n\n\/\/ \u4fa1\u683c\u304c100\u30c9\u30eb\u4ee5\u4e0a\u306e\u5546\u54c1\u3092\u53d6\u308a\u51fa\u3059\n$premium = array_filter($products, function($product) {\n    return $product[\"price\"] &gt;= 100;\n});\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff08\u96fb\u5b50\u6a5f\u5668\u30ab\u30c6\u30b4\u30ea\u30fc\u3067500\u30c9\u30eb\u4ee5\u4e0a\u306e\u5546\u54c1\uff09\n$premiumElectronics = array_filter($products, function($product) {\n    return $product[\"category\"] === \"electronics\" &amp;&amp; $product[\"price\"] &gt;= 500;\n});\n\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u8981\u7d20\u306b\u57fa\u3065\u304f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$users = [\n    [\"name\" =&gt; \"John\", \"permissions\" =&gt; [\"read\" =&gt; true, \"write\" =&gt; true, \"delete\" =&gt; true]],\n    [\"name\" =&gt; \"Jane\", \"permissions\" =&gt; [\"read\" =&gt; true, \"write\" =&gt; true, \"delete\" =&gt; false]],\n    [\"name\" =&gt; \"Bob\", \"permissions\" =&gt; [\"read\" =&gt; true, \"write\" =&gt; false\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function calculateTotal($price, $tax, $shipping) {\n    return $price + ($price * $tax \/ 100) + $shipping;\n}\n\n$orderParams = [29.99, 8.5, 3.95];\n\n\/\/ PHP 7.3\u4ee5\u524d\n$total = calculateTotal($orderParams[0], $orderParams[1], $orderParams[2]);\n\n\/\/ PHP 7.4\u4ee5\u964d\n$total = calculateTotal(...$orderParams);\necho $total; \/\/ 36.50\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-207\">\u53ef\u5909\u9577\u5f15\u6570\u306e\u53ce\u96c6\u3068\u5c55\u958b<\/h4>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u95a2\u6570\u5b9a\u7fa9\u3067\u3082\u4f7f\u7528\u3067\u304d\u3001\u4efb\u610f\u306e\u6570\u306e\u5f15\u6570\u3092\u914d\u5217\u3068\u3057\u3066\u53ce\u96c6\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u53ef\u5909\u9577\u5f15\u6570\u306e\u95a2\u6570\u5b9a\u7fa9\nfunction sum(...$numbers) {\n    return array_sum($numbers);\n}\n\n\/\/ \u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u547c\u3073\u51fa\u3057\necho sum(1, 2, 3, 4); \/\/ 10\n\n\/\/ \u914d\u5217\u3092\u5c55\u958b\u3057\u3066\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\n$values = [5, 6, 7, 8];\necho sum(...$values); \/\/ 26\n\n\/\/ \u500b\u5225\u306e\u5024\u3068\u914d\u5217\u3092\u6df7\u5408\necho sum(1, 2, ...$values); \/\/ 29\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-208\">PHP 8\u3067\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306e\u6539\u826f<\/h4>\n\n\n\n<p>PHP 8\u3067\u306f\u3001\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u304c\u6587\u5b57\u5217\u30ad\u30fc\u3092\u6301\u3064\u914d\u5217\u3067\u3082\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u62e1\u5f35\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8\u4ee5\u964d\n$defaults = [\"font\" =&gt; \"Arial\", \"size\" =&gt; 12];\n$custom = [\"color\" =&gt; \"blue\", \"weight\" =&gt; \"bold\"];\n\n\/\/ \u540d\u524d\u4ed8\u304d\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\nfunction formatText($text, $font, $size, $color = \"black\", $weight = \"normal\") {\n    return \"&lt;span style=\\\"font-family: $font; font-size: {$size}px; color: $color; font-weight: $weight;\\\"&gt;$text&lt;\/span&gt;\";\n}\n\necho formatText(\"Hello\", ...$defaults, ...$custom);\n\/\/ &lt;span style=\"font-family: Arial; font-size: 12px; color: blue; font-weight: bold;\"&gt;Hello&lt;\/span&gt;\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-209\">array_key_first()\u3068array_key_last()\u306e\u4fbf\u5229\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>PHP 7.3\u3067\u306f\u3001\u914d\u5217\u306e\u6700\u521d\u3068\u6700\u5f8c\u306e\u30ad\u30fc\u3092\u7c21\u5358\u306b\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u95a2\u6570\u306b\u3088\u308a\u3001\u914d\u5217\u306e\u5883\u754c\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-210\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\narray_key_first(array $array): mixed\narray_key_last(array $array): mixed\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruits = [\"apple\" =&gt; \"red\", \"banana\" =&gt; \"yellow\", \"grape\" =&gt; \"purple\"];\n\n\/\/ \u6700\u521d\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$firstKey = array_key_first($fruits);\necho $firstKey; \/\/ \"apple\"\n\n\/\/ \u6700\u5f8c\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$lastKey = array_key_last($fruits);\necho $lastKey; \/\/ \"grape\"\n\n\/\/ \u6700\u521d\u3068\u6700\u5f8c\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\necho $fruits[array_key_first($fruits)]; \/\/ \"red\"\necho $fruits[array_key_last($fruits)]; \/\/ \"purple\"\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-211\">PHP 7.3\u4ee5\u524d\u306e\u540c\u7b49\u30b3\u30fc\u30c9<\/h4>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u95a2\u6570\u304c\u5c0e\u5165\u3055\u308c\u308b\u524d\u306f\u3001reset()\u3001end()\u3001key()\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.2\u4ee5\u524d\u3067\u6700\u521d\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$firstKey = null;\nif (!empty($fruits)) {\n    reset($fruits);\n    $firstKey = key($fruits);\n}\n\n\/\/ PHP 7.2\u4ee5\u524d\u3067\u6700\u5f8c\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$lastKey = null;\nif (!empty($fruits)) {\n    end($fruits);\n    $lastKey = key($fruits);\n    reset($fruits); \/\/ \u30dd\u30a4\u30f3\u30bf\u3092\u5143\u306b\u623b\u3059\n}\n<\/pre>\n\n\n\n<p>\u65b0\u3057\u3044\u95a2\u6570\u306e\u5229\u70b9\u306f\u3001\u5185\u90e8\u914d\u5217\u30dd\u30a4\u30f3\u30bf\u3092\u5909\u66f4\u3057\u306a\u3044\u3053\u3068\u3067\u3059\u3002reset()\u3084end()\u306f\u914d\u5217\u306e\u5185\u90e8\u30dd\u30a4\u30f3\u30bf\u3092\u5909\u66f4\u3059\u308b\u305f\u3081\u3001\u30eb\u30fc\u30d7\u4e2d\u306b\u4f7f\u3046\u3068\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-212\">\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u5148\u982d\u307e\u305f\u306f\u672b\u5c3e\u306e\u8981\u7d20\u3092\u524a\u9664<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$queue = [\"task1\", \"task2\", \"task3\", \"task4\"];\n\n\/\/ \u5148\u982d\u306e\u8981\u7d20\u3092\u524a\u9664\uff08FIFO\u30ad\u30e5\u30fc\uff09\nif (($firstKey = array_key_first($queue)) !== null) {\n    $firstItem = $queue[$firstKey];\n    unset($queue[$firstKey]);\n    echo \"Processing: $firstItem\\n\";\n}\n\n\/\/ \u672b\u5c3e\u306e\u8981\u7d20\u3092\u524a\u9664\uff08LIFO\u30b9\u30bf\u30c3\u30af\uff09\nif (($lastKey = array_key_last($queue)) !== null) {\n    $lastItem = $queue[$lastKey];\n    unset($queue[$lastKey]);\n    echo \"Processing: $lastItem\\n\";\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u6700\u65b0\u307e\u305f\u306f\u6700\u53e4\u306e\u30a8\u30f3\u30c8\u30ea\u306e\u53d6\u5f97<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$logEntries = [\n    \"2023-01-15\" =&gt; \"System started\",\n    \"2023-01-16\" =&gt; \"User login\",\n    \"2023-01-17\" =&gt; \"Data updated\",\n    \"2023-01-18\" =&gt; \"Error occurred\"\n];\n\n\/\/ \u6700\u65b0\u306e\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u53d6\u5f97\n$latestDate = array_key_last($logEntries);\necho \"Latest log ($latestDate): {$logEntries[$latestDate]}\\n\";\n\n\/\/ \u6700\u53e4\u306e\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u53d6\u5f97\n$oldestDate = array_key_first($logEntries);\necho \"Oldest log ($oldestDate): {$logEntries[$oldestDate]}\\n\";\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u7a7a\u306e\u914d\u5217\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$emptyArray = [];\n\n\/\/ array_key_first\/last \u306f\u7a7a\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066 null \u3092\u8fd4\u3059\n$firstKey = array_key_first($emptyArray);\n$lastKey = array_key_last($emptyArray);\n\nvar_dump($firstKey); \/\/ NULL\nvar_dump($lastKey);  \/\/ NULL\n\n\/\/ \u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\nif (($firstKey = array_key_first($data)) !== null) {\n    \/\/ \u914d\u5217\u304c\u7a7a\u3067\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    echo $data[$firstKey];\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-213\">null\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u3068\u914d\u5217\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\uff08<code>??<\/code>\uff09\u306f\u3001PHP 7.0\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u6f14\u7b97\u5b50\u306f\u3001\u914d\u5217\u306e\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u969b\u306b\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-214\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u69cb\u6587\n$value = $array['key'] ?? $default;\n\/\/ \u3053\u308c\u306f\u6b21\u306e\u30b3\u30fc\u30c9\u3068\u540c\u7b49\n$value = isset($array['key']) ? $array['key'] : $default;\n<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    \"name\" =&gt; \"John\",\n    \"age\" =&gt; 30\n];\n\n\/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\n$name = $user[\"name\"] ?? \"Unknown\";\necho $name; \/\/ \"John\"\n\n\/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\n$city = $user[\"city\"] ?? \"Unknown\";\necho $city; \/\/ \"Unknown\"\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-215\">\u9023\u9396\u4f7f\u7528<\/h4>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\u306f\u9023\u9396\u4f7f\u7528\u3067\u304d\u3001\u8907\u6570\u306e\u5019\u88dc\u304b\u3089\u6700\u521d\u306b\u5b58\u5728\u3059\u308b\u5024\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$config = [\n    \"development\" =&gt; [\n        \"db\" =&gt; [\n            \"host\" =&gt; \"localhost\"\n        ]\n    ]\n];\n\n\/\/ \u8907\u6570\u306e\u8a2d\u5b9a\u30bd\u30fc\u30b9\u304b\u3089\u5024\u3092\u53d6\u5f97\n$host = $config[\"production\"][\"db\"][\"host\"] ?? \n       $config[\"development\"][\"db\"][\"host\"] ?? \n       \"localhost\";\necho $host; \/\/ \"localhost\"\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-216\">\u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h4>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u3084API\u30ea\u30af\u30a8\u30b9\u30c8\u306a\u3069\u306e\u5916\u90e8\u5165\u529b\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ GET\/POST\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5b89\u5168\u306a\u53d6\u5f97\n$page = $_GET[\"page\"] ?? 1;\n$limit = $_GET[\"limit\"] ?? 10;\n\n\/\/ JSON\u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n$requestData = json_decode(file_get_contents(\"php:\/\/input\"), true);\n$username = $requestData[\"user\"][\"username\"] ?? \"\";\n$email = $requestData[\"user\"][\"email\"] ?? \"\";\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u51e6\u7406\n$userData = fetchUserFromDatabase($userId);\n$firstName = $userData[\"firstName\"] ?? \"Guest\";\n$lastName = $userData[\"lastName\"] ?? \"\";\n$fullName = $firstName . ($lastName ? \" \" . $lastName : \"\");\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-217\">array_column()\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\u3068array_column()\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u7279\u5b9a\u306e\u5217\u3092\u5b89\u5168\u306b\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    [\"id\" =&gt; 1, \"name\" =&gt; \"John\", \"email\" =&gt; \"john@example.com\"],\n    [\"id\" =&gt; 2, \"name\" =&gt; \"Jane\"], \/\/ email\u30ad\u30fc\u304c\u306a\u3044\n    [\"id\" =&gt; 3, \"name\" =&gt; \"Bob\", \"email\" =&gt; \"bob@example.com\"]\n];\n\n\/\/ PHP 7.0\u4ee5\u964d\n$emails = array_map(function($user) {\n    return $user[\"email\"] ?? \"N\/A\";\n}, $users);\nprint_r($emails); \/\/ [\"john@example.com\", \"N\/A\", \"bob@example.com\"]\n\n\/\/ PHP 7.4\u4ee5\u964d\u306f\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u3088\u308a\u7c21\u6f54\u306b\n$emails = array_map(fn($user) =&gt; $user[\"email\"] ?? \"N\/A\", $users);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-218\">\u305d\u306e\u4ed6\u306ePHP 7\/8\u306e\u914d\u5217\u95a2\u9023\u65b0\u6a5f\u80fd<\/h3>\n\n\n\n<p>PHP 7\u30688\u3067\u306f\u3001\u3055\u3089\u306b\u591a\u304f\u306e\u65b0\u6a5f\u80fd\u3084\u6539\u826f\u304c\u914d\u5217\u64cd\u4f5c\u306b\u95a2\u3057\u3066\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-219\">PHP 7.4: \u30a2\u30ed\u30fc\u95a2\u6570<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\uff08Arrow Functions\uff09\u306f\u3001\u7279\u306b\u914d\u5217\u64cd\u4f5c\u306e\u969b\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u7c21\u6f54\u306b\u66f8\u304f\u305f\u3081\u306b\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.3\u4ee5\u524d\n$doubled = array_map(function($n) {\n    return $n * 2;\n}, $numbers);\n\n\/\/ PHP 7.4\u4ee5\u964d\n$doubled = array_map(fn($n) =&gt; $n * 2, $numbers);\n\n\/\/ \u5916\u90e8\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u3082\u7c21\u5358\n$factor = 3;\n$multiplied = array_map(fn($n) =&gt; $n * $factor, $numbers);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-220\">PHP 8.0: \u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306e\u6539\u826f<\/h4>\n\n\n\n<p>PHP 8.0\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3092\u4f7f\u3046\u3068\u3001\u914d\u5217\u3092\u64cd\u4f5c\u3059\u308b\u95a2\u6570\u306e\u5f15\u6570\u3092\u3088\u308a\u660e\u793a\u7684\u306b\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0\u4ee5\u964d\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570\n$result = array_filter(\n    array: $data,\n    callback: fn($x) =&gt; $x &gt; 10,\n    mode: ARRAY_FILTER_USE_BOTH\n);\n\n\/\/ \u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3068\u540d\u524d\u4ed8\u304d\u5f15\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\n$config = [\n    \"host\" =&gt; \"localhost\",\n    \"port\" =&gt; 3306,\n    \"user\" =&gt; \"root\"\n];\n\nconnectToDatabase(\n    password: \"secret\",\n    ...$config\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-221\">PHP 8.0: match\u5f0f<\/h4>\n\n\n\n<p>match\u5f0f\u306f\u3001switch\u6587\u3088\u308a\u8868\u73fe\u529b\u304c\u9ad8\u304f\u3001\u914d\u5217\u64cd\u4f5c\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3088\u308a\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$status = match ($statusCode) {\n    200, 201, 202 =&gt; 'success',\n    400, 401, 403 =&gt; 'client_error',\n    500, 502, 503 =&gt; 'server_error',\n    default =&gt; 'unknown',\n};\n\n\/\/ \u914d\u5217\u306e\u5024\u306b\u57fa\u3065\u304f\u5909\u63db\n$userType = match ($user['role']) {\n    'admin' =&gt; ['color' =&gt; 'red', 'permissions' =&gt; ['read', 'write', 'delete']],\n    'editor' =&gt; ['color' =&gt; 'blue', 'permissions' =&gt; ['read', 'write']],\n    'viewer' =&gt; ['color' =&gt; 'green', 'permissions' =&gt; ['read']],\n    default =&gt; ['color' =&gt; 'gray', 'permissions' =&gt; []],\n};\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-222\">PHP 8.0: Nullsafe\u6f14\u7b97\u5b50<\/h4>\n\n\n\n<p>Nullsafe\u6f14\u7b97\u5b50\uff08`?-&gt;\uff09\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u914d\u5217\u306e\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001\u9014\u4e2d\u3067null\u304c\u898b\u3064\u304b\u3063\u305f\u5834\u5408\u306b\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3055\u305b\u305a\u306bnull\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u591a\u6b21\u5143\u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6df7\u5408\u30a2\u30af\u30bb\u30b9\n$data = [\n    'user' =&gt; new User(),\n    'settings' =&gt; null\n];\n\n\/\/ PHP 8.0\u4ee5\u524d\n$theme = isset($data['settings']) &amp;&amp; is_array($data['settings']) &amp;&amp; isset($data['settings']['theme'])\n    ? $data['settings']['theme']\n    : 'default';\n\n\/\/ PHP 8.0\u4ee5\u964d\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u306e\u307f\u4f7f\u7528\u53ef\u80fd\uff09\n$username = $data['user']?-&gt;getProfile()?-&gt;getName() ?? 'Guest';\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-223\">PHP 8.1: \u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3067\u306e\u30ad\u30fc\u4fdd\u6301<\/h4>\n\n\n\n<p>PHP 8.1\u3067\u306f\u3001\u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u304c\u6587\u5b57\u5217\u30ad\u30fc\u306e\u5834\u5408\u3067\u3082\u6b63\u3057\u304f\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u6539\u826f\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.1\u4ee5\u964d\n$array1 = [\"a\" =&gt; 1, \"b\" =&gt; 2];\n$array2 = [\"b\" =&gt; 3, \"c\" =&gt; 4];\n\n\/\/ \u6587\u5b57\u5217\u30ad\u30fc\u304c\u6b63\u3057\u304f\u51e6\u7406\u3055\u308c\u308b\uff08\u91cd\u8907\u306f\u5f8c\u306e\u3082\u306e\u304c\u512a\u5148\uff09\n$merged = [...$array1, ...$array2];\nprint_r($merged); \/\/ [\"a\" =&gt; 1, \"b\" =&gt; 3, \"c\" =&gt; 4]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-224\">\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-225\">\u8a2d\u5b9a\u306e\u30de\u30fc\u30b8\u3068\u512a\u5148\u9806\u4f4d\u4ed8\u3051<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8a2d\u5b9a\u3092\u7570\u306a\u308b\u30bd\u30fc\u30b9\u304b\u3089\u30de\u30fc\u30b8\u3059\u308b\n$defaultConfig = [\n    \"app\" =&gt; [\n        \"debug\" =&gt; false,\n        \"timezone\" =&gt; \"UTC\",\n        \"locale\" =&gt; \"en\"\n    ],\n    \"db\" =&gt; [\n        \"host\" =&gt; \"localhost\",\n        \"port\" =&gt; 3306\n    ]\n];\n\n$envConfig = [\n    \"app\" =&gt; [\n        \"debug\" =&gt; true\n    ],\n    \"db\" =&gt; [\n        \"password\" =&gt; \"secret\"\n    ]\n];\n\n$userConfig = [\n    \"app\" =&gt; [\n        \"locale\" =&gt; \"ja\"\n    ]\n];\n\n\/\/ PHP 7.4\u4ee5\u964d\n$config = [\n    \"app\" =&gt; [\n        ...$defaultConfig[\"app\"] ?? [],\n        ...$envConfig[\"app\"] ?? [],\n        ...$userConfig[\"app\"] ?? []\n    ],\n    \"db\" =&gt; [\n        ...$defaultConfig[\"db\"] ?? [],\n        ...$envConfig[\"db\"] ?? [],\n        ...$userConfig[\"db\"] ?? []\n    ]\n];\n\n\/\/ \u30a2\u30af\u30bb\u30b9\uff08PHP 7.0\u4ee5\u964d\uff09\n$debug = $config[\"app\"][\"debug\"] ?? false;\n$password = $config[\"db\"][\"password\"] ?? \"\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-226\">\u30c7\u30fc\u30bf\u51e6\u7406\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.4\u4ee5\u964d\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u51e6\u7406\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\n$users = [\n    [\"name\" =&gt; \"John\", \"age\" =&gt; 32, \"active\" =&gt; true],\n    [\"name\" =&gt; \"Jane\", \"age\" =&gt; 28, \"active\" =&gt; false],\n    [\"name\" =&gt; \"Bob\", \"age\" =&gt; 45, \"active\" =&gt; true],\n    [\"name\" =&gt; \"Alice\", \"age\" =&gt; 23, \"active\" =&gt; true]\n];\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u3001\u5e74\u9f62\u306e\u6607\u9806\u3067\u30bd\u30fc\u30c8\u3057\u3001\u540d\u524d\u3092\u53d6\u5f97\n$activeUserNames = array_map(\n    fn($user) =&gt; $user[\"name\"],\n    array_filter(\n        $users,\n        fn($user) =&gt; $user[\"active\"] ?? false\n    )\n);\n\n\/\/ \u540c\u3058\u51e6\u7406\u3092\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u6bb5\u968e\u7684\u306b\u5b9f\u884c\n$activeUsers = array_filter($users, fn($user) =&gt; $user[\"active\"] ?? false);\nusort($activeUsers, fn($a, $b) =&gt; $a[\"age\"] &lt;=&gt; $b[\"age\"]);\n$activeUserNames = array_map(fn($user) =&gt; $user[\"name\"], $activeUsers);\n\nprint_r($activeUserNames); \/\/ [\"Alice\", \"John\", \"Bob\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-227\">\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306a\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7\/8\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u305f\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n$formData = $_POST;\n\n\/\/ \u30d5\u30a9\u30fc\u30e0\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5b9a\u7fa9\n$fields = [\n    \"name\" =&gt; [\"required\" =&gt; true, \"type\" =&gt; \"string\"],\n    \"email\" =&gt; [\"required\" =&gt; true, \"type\" =&gt; \"email\"],\n    \"age\" =&gt; [\"required\" =&gt; false, \"type\" =&gt; \"int\"],\n    \"interests\" =&gt; [\"required\" =&gt; false, \"type\" =&gt; \"array\"]\n];\n\n\/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u53ce\u96c6\n$errors = [];\n\n\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u51e6\u7406\n$processedData = [];\nforeach ($fields as $field =&gt; $rules) {\n    \/\/ \u5024\u306e\u53d6\u5f97\uff08null\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\uff09\n    $value = $formData[$field] ?? null;\n    \n    \/\/ \u5fc5\u9808\u30c1\u30a7\u30c3\u30af\n    if (($rules[\"required\"] ?? false) &amp;&amp; ($value === null || $value === \"\")) {\n        $errors[$field] = \"The $field field is required.\";\n        continue;\n    }\n    \n    \/\/ \u30bf\u30a4\u30d7\u306b\u57fa\u3065\u304f\u51e6\u7406\n    if ($value !== null) {\n        $processedData[$field] = match ($rules[\"type\"] ?? \"string\") {\n            \"int\" =&gt; (int) $value,\n            \"float\" =&gt; (float) $value,\n            \"bool\" =&gt; (bool) $value,\n            \"array\" =&gt; is_array($value) ? $value : [$value],\n            \"email\" =&gt; filter_var($value, FILTER_VALIDATE_EMAIL),\n            default =&gt; $value\n        };\n    }\n}\n\n\/\/ \u30a8\u30e9\u30fc\u306e\u30c1\u30a7\u30c3\u30af\nif (!empty($errors)) {\n    echo \"Validation errors:\\n\";\n    foreach ($errors as $field =&gt; $error) {\n        echo \"- $error\\n\";\n    }\n} else {\n    echo \"Form data processed successfully.\\n\";\n    print_r($processedData);\n}\n<\/pre>\n\n\n\n<p>PHP 7\u30688\u3067\u5c0e\u5165\u3055\u308c\u305f\u914d\u5217\u95a2\u9023\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3001null\u5408\u4f53\u6f14\u7b97\u5b50\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u30b3\u30fc\u30c9\u3092\u5927\u5e45\u306b\u6539\u5584\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002## PHP7\/8\u3067\u8ffd\u52a0\u3055\u308c\u305f\u914d\u5217\u95a2\u9023\u306e\u65b0\u6a5f\u80fd<\/p>\n\n\n\n<p>PHP 7\u304a\u3088\u30738\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u64cd\u4f5c\u3092\u3088\u308a\u7c21\u6f54\u304b\u3064\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u591a\u304f\u306e\u65b0\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3001array_key_first()\/array_key_last()\u95a2\u6570\u3001null\u5408\u4f53\u6f14\u7b97\u5b50\u306a\u3069\u306e\u65b0\u6a5f\u80fd\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-228\">\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08\u2026\uff09\u306e\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08<code>...<\/code>\uff09\u306f\u3001PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u69cb\u6587\u3067\u3001\u914d\u5217\u3092\u5c55\u958b\u3057\u3066\u5225\u306e\u914d\u5217\u306b\u7d44\u307f\u8fbc\u3093\u3060\u308a\u3001\u53ef\u5909\u9577\u5f15\u6570\u3068\u3057\u3066\u95a2\u6570\u306b\u6e21\u3057\u305f\u308a\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-229\">\u914d\u5217\u306e\u7d50\u5408<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.3\u4ee5\u524d\u306e\u914d\u5217\u7d50\u5408\n$fruits1 = [\"apple\", \"banana\"];\n$fruits2 = [\"orange\", \"grape\"];\n$allFruits = array_merge($fruits1, $fruits2);\n\n\/\/ PHP 7.4\u4ee5\u964d\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u7d50\u5408\n$allFruits = [...$fruits1, ...$fruits2];\nprint_r($allFruits); \/\/ [\"apple\", \"banana\", \"orange\", \"grape\"]\n<\/pre>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u914d\u5217\u7d50\u5408\u306f\u3001array_merge()\u3068\u57fa\u672c\u7684\u306b\u540c\u3058\u52d5\u4f5c\u3092\u3057\u307e\u3059\u304c\u3001\u3088\u308a\u8aad\u307f\u3084\u3059\u3044\u69cb\u6587\u3067\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-230\">\u914d\u5217\u306e\u4e2d\u9593\u3078\u306e\u633f\u5165<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$colors = [\"red\", \"blue\"];\n\n\/\/ \u914d\u5217\u306e\u4e2d\u9593\u306b\u8981\u7d20\u3092\u633f\u5165\n$extendedColors = [\"green\", ...$colors, \"yellow\"];\nprint_r($extendedColors); \/\/ [\"green\", \"red\", \"blue\", \"yellow\"]\n\n\/\/ \u8907\u6570\u306e\u914d\u5217\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\n$warmColors = [\"red\", \"orange\", \"yellow\"];\n$coolColors = [\"blue\", \"purple\"];\n$allColors = [...$warmColors, \"green\", ...$coolColors];\nprint_r($allColors); \/\/ [\"red\", \"orange\", \"yellow\", \"green\", \"blue\", \"purple\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-231\">\u30ad\u30fc\u306e\u4fdd\u6301<\/h4>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u3001\u6570\u5024\u30ad\u30fc\u3092\u6301\u3064\u8981\u7d20\u306f\u518d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3057\u307e\u3059\u304c\u3001\u6587\u5b57\u5217\u30ad\u30fc\u306f\u4fdd\u6301\u3057\u307e\u3059\u3002\u3053\u308c\u306farray_merge()\u3068\u540c\u3058\u52d5\u4f5c\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$defaults = [\"font\" =&gt; \"Arial\", \"size\" =&gt; 12];\n$overrides = [\"size\" =&gt; 14, \"color\" =&gt; \"blue\"];\n\n\/\/ \u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3067\u7d50\u5408\uff08\u6587\u5b57\u5217\u30ad\u30fc\u306f\u4fdd\u6301\u3001\u91cd\u8907\u306f\u4e0a\u66f8\u304d\uff09\n$settings = [...$defaults, ...$overrides];\nprint_r($settings); \/\/ [\"font\" =&gt; \"Arial\", \"size\" =&gt; 14, \"color\" =&gt; \"blue\"]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-232\">\u95a2\u6570\u5f15\u6570\u3068\u3057\u3066\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50<\/h4>\n\n\n\n<p>\u914d\u5217\u306e\u8981\u7d20\u3092\u95a2\u6570\u306e\u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function calculateTotal($price, $tax, $shipping) {\n    return $price + ($price * $tax \/ 100) + $shipping;\n}\n\n$orderParams = [29.99, 8.5, 3.95];\n\n\/\/ PHP 7.3\u4ee5\u524d\n$total = calculateTotal($orderParams[0], $orderParams[1], $orderParams[2]);\n\n\/\/ PHP 7.4\u4ee5\u964d\n$total = calculateTotal(...$orderParams);\necho $total; \/\/ 36.50\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-233\">\u53ef\u5909\u9577\u5f15\u6570\u306e\u53ce\u96c6\u3068\u5c55\u958b<\/h4>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u95a2\u6570\u5b9a\u7fa9\u3067\u3082\u4f7f\u7528\u3067\u304d\u3001\u4efb\u610f\u306e\u6570\u306e\u5f15\u6570\u3092\u914d\u5217\u3068\u3057\u3066\u53ce\u96c6\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\/\/ $data\u306f\u5143\u306e\u914d\u5217\u3078\u306e\u53c2\u7167 foreach ($data as $key =&gt; &amp;$value) { $value = transform($value); } unset($value); \/\/ \u53c2\u7167\u3092\u89e3\u9664 }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n\u53c2\u7167\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30eb\u30fc\u30d7\u5f8c\u306b\u53c2\u7167\u5909\u6570\u3092\u89e3\u9664\uff08unset\uff09\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u305d\u3046\u3057\u306a\u3044\u3068\u3001\u5f8c\u7d9a\u306e\u30b3\u30fc\u30c9\u3067\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\n\n#### \u5927\u304d\u306a\u914d\u5217\u306e\u4e0d\u8981\u90e8\u5206\u306e\u89e3\u653e\n\n\u5927\u304d\u306a\u914d\u5217\u306e\u4e00\u90e8\u3092\u51e6\u7406\u3057\u305f\u5f8c\u306f\u3001\u4e0d\u8981\u306b\u306a\u3063\u305f\u90e8\u5206\u3092\u660e\u793a\u7684\u306b\u89e3\u653e\u3059\u308b\u3068\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\n\n```php\n\/\/ \u5927\u304d\u306a\u914d\u5217\u3092\u90e8\u5206\u7684\u306b\u51e6\u7406\u3057\u3066\u89e3\u653e\u3059\u308b\u4f8b\n$largeArray = fetchMillionsOfRecords(); \/\/ \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n\n\/\/ \u30d0\u30c3\u30c1\u3054\u3068\u306b\u51e6\u7406\n$batchSize = 10000;\n$totalBatches = ceil(count($largeArray) \/ $batchSize);\n\nfor ($i = 0; $i &lt; $totalBatches; $i++) {\n    \/\/ \u73fe\u5728\u306e\u30d0\u30c3\u30c1\u3092\u53d6\u5f97\n    $start = $i * $batchSize;\n    $batch = array_slice($largeArray, $start, $batchSize);\n    \n    \/\/ \u30d0\u30c3\u30c1\u3092\u51e6\u7406\n    processBatch($batch);\n    \n    \/\/ \u3053\u306e\u30d0\u30c3\u30c1\u306e\u30c7\u30fc\u30bf\u304c\u4e0d\u8981\u306b\u306a\u3063\u305f\u3089\u5143\u306e\u914d\u5217\u304b\u3089\u524a\u9664\n    if ($i &gt; 0) {\n        \/\/ \u524d\u306e\u30d0\u30c3\u30c1\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\uff08\u30e1\u30e2\u30ea\u3092\u89e3\u653e\uff09\n        $prevStart = ($i - 1) * $batchSize;\n        for ($j = $prevStart; $j &lt; $start; $j++) {\n            unset($largeArray[$j]);\n        }\n    }\n}\n\n\/\/ \u51e6\u7406\u304c\u5b8c\u4e86\u3057\u305f\u3089\u914d\u5217\u5168\u4f53\u3092\u89e3\u653e\n$largeArray = null;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-234\">\u4e00\u6642\u30c7\u30fc\u30bf\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u5236\u9650<\/h4>\n\n\n\n<p>\u7279\u306b\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u306e\u4e2d\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30b5\u30a4\u30ba\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ LRU\uff08Least Recently Used\uff09\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5b9f\u88c5\nclass LruCache {\n    private $cache = [];\n    private $maxSize;\n    \n    public function __construct($maxSize = 1000) {\n        $this-&gt;maxSize = $maxSize;\n    }\n    \n    public function get($key) {\n        if (!isset($this-&gt;cache[$key])) {\n            return null;\n        }\n        \n        \/\/ \u30a2\u30af\u30bb\u30b9\u3055\u308c\u305f\u30a2\u30a4\u30c6\u30e0\u3092\u5148\u982d\u306b\u79fb\u52d5\uff08\u6700\u65b0\u3068\u3057\u3066\u6271\u3046\uff09\n        $value = $this-&gt;cache[$key];\n        unset($this-&gt;cache[$key]);\n        $this-&gt;cache[$key] = $value;\n        \n        return $value;\n    }\n    \n    public function set($key, $value) {\n        \/\/ \u30ad\u30fc\u304c\u65e2\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u524a\u9664\n        if (isset($this-&gt;cache[$key])) {\n            unset($this-&gt;cache[$key]);\n        }\n        \n        \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u304c\u4e0a\u9650\u306b\u9054\u3057\u305f\u3089\u3001\u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n        if (count($this-&gt;cache) &gt;= $this-&gt;maxSize) {\n            reset($this-&gt;cache);\n            $oldestKey = key($this-&gt;cache);\n            unset($this-&gt;cache[$oldestKey]);\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n        $this-&gt;cache[$key] = $value;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$dataCache = new LruCache(100); \/\/ \u6700\u5927100\u30a2\u30a4\u30c6\u30e0\u307e\u3067\u4fdd\u6301\n\n\/\/ \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4e2d\u3067\u4f7f\u7528\nforeach ($largeDataset as $id =&gt; $data) {\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u3042\u308c\u3070\u305d\u308c\u3092\u4f7f\u7528\n    $processedData = $dataCache-&gt;get($id);\n    if ($processedData === null) {\n        \/\/ \u306a\u3051\u308c\u3070\u8a08\u7b97\u3057\u3066\u4fdd\u5b58\n        $processedData = expensiveComputation($data);\n        $dataCache-&gt;set($id, $processedData);\n    }\n    \n    \/\/ \u51e6\u7406\u3092\u7d99\u7d9a...\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-235\">\u30c7\u30fc\u30bf\u306e\u5c0f\u3055\u306a\u8868\u73fe\u3078\u306e\u5909\u63db<\/h4>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u3001\u5b8c\u5168\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u306f\u306a\u304f\u3001\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u60c5\u5831\u3060\u3051\u3092\u542b\u3080\u30b7\u30f3\u30d7\u30eb\u306a\u914d\u5217\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u3092\u7bc0\u7d04\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e1\u30e2\u30ea\u3092\u5927\u91cf\u306b\u4f7f\u7528\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f8b\nclass HeavyObject {\n    public $id;\n    public $name;\n    public $description;\n    public $metadata;\n    public $relationships;\n    public $history;\n    \/\/ ...\u305d\u306e\u4ed6\u591a\u304f\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\n}\n\n\/\/ \u5927\u91cf\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u51e6\u7406\u3059\u308b\u95a2\u6570\nfunction processObjects($objects) {\n    \/\/ \u5fc5\u8981\u306a\u60c5\u5831\u3060\u3051\u3092\u542b\u3080\u8efd\u91cf\u306a\u8868\u73fe\u306b\u5909\u63db\n    $lightObjects = [];\n    foreach ($objects as $object) {\n        \/\/ \u5fc5\u8981\u306a\u60c5\u5831\u3060\u3051\u3092\u62bd\u51fa\n        $lightObjects[] = [\n            'id' =&gt; $object-&gt;id,\n            'name' =&gt; $object-&gt;name\n            \/\/ \u51e6\u7406\u306b\u5fc5\u8981\u306a\u6700\u5c0f\u9650\u306e\u30c7\u30fc\u30bf\u306e\u307f\n        ];\n    }\n    \n    \/\/ \u5143\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u914d\u5217\u3092\u89e3\u653e\n    unset($objects);\n    \n    \/\/ \u8efd\u91cf\u7248\u3067\u51e6\u7406\u3092\u7d9a\u884c\n    return processLightObjects($lightObjects);\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-236\">\u914d\u5217\u64cd\u4f5c\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u305d\u306e\u89e3\u6d88\u6cd5<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u4e00\u822c\u7684\u306a\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u3001\u305d\u308c\u3089\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-237\">\u30eb\u30fc\u30d7\u5185\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u306e\u6700\u5c0f\u5316<\/h4>\n\n\n\n<p>\u30eb\u30fc\u30d7\u5185\u3067\u540c\u3058\u95a2\u6570\u3092\u7e70\u308a\u8fd4\u3057\u547c\u3073\u51fa\u3059\u3068\u3001\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u7a4d\u307f\u91cd\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u4f8b\n$array = range(1, 10000);\n$result = [];\n\n\/\/ \u30eb\u30fc\u30d7\u3054\u3068\u306bcount()\u3092\u547c\u3073\u51fa\u3059\nfor ($i = 0; $i &lt; count($array); $i++) {\n    $result[] = $array[$i] * 2;\n}\n\n\/\/ \u6700\u9069\u5316\u4f8b\n$array = range(1, 10000);\n$result = [];\n$count = count($array); \/\/ \u30eb\u30fc\u30d7\u306e\u524d\u306b\u4e00\u5ea6\u3060\u3051\u8a08\u7b97\n\nfor ($i = 0; $i &lt; $count; $i++) {\n    $result[] = $array[$i] * 2;\n}\n\n\/\/ \u3055\u3089\u306b\u6700\u9069\u5316\uff08foreach\u4f7f\u7528\uff09\n$array = range(1, 10000);\n$result = [];\n\nforeach ($array as $value) {\n    $result[] = $value * 2;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-238\">\u53cd\u5fa9\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u7d71\u5408<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u64cd\u4f5c\u3092\u4e00\u3064\u306e\u30eb\u30fc\u30d7\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u4f8b\uff08\u8907\u6570\u56de\u306e\u914d\u5217\u8d70\u67fb\uff09\n$data = fetchLargeDataset();\n\n\/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$filtered = array_filter($data, function($item) {\n    return $item['status'] === 'active';\n});\n\n\/\/ \u30de\u30c3\u30d4\u30f3\u30b0\n$mapped = array_map(function($item) {\n    $item['score'] = calculateScore($item);\n    return $item;\n}, $filtered);\n\n\/\/ \u30bd\u30fc\u30c8\nusort($mapped, function($a, $b) {\n    return $b['score'] &lt;=&gt; $a['score'];\n});\n\n\/\/ \u4e0a\u4f4d10\u4ef6\u3092\u53d6\u5f97\n$topItems = array_slice($mapped, 0, 10);\n\n\/\/ \u6700\u9069\u5316\u4f8b\uff081\u56de\u306e\u30eb\u30fc\u30d7\u3067\u3059\u3079\u3066\u306e\u64cd\u4f5c\u3092\u884c\u3046\uff09\n$data = fetchLargeDataset();\n$processed = [];\n\nforeach ($data as $item) {\n    \/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n    if ($item['status'] !== 'active') {\n        continue;\n    }\n    \n    \/\/ \u30de\u30c3\u30d4\u30f3\u30b0\n    $item['score'] = calculateScore($item);\n    $processed[] = $item;\n}\n\n\/\/ \u30bd\u30fc\u30c8\uff08\u5fc5\u8981\u306a\u9805\u76ee\u3060\u3051\u3092\u30bd\u30fc\u30c8\uff09\nusort($processed, function($a, $b) {\n    return $b['score'] &lt;=&gt; $a['score'];\n});\n\n\/\/ \u4e0a\u4f4d10\u4ef6\u306e\u307f\u3092\u4fdd\u6301\uff08\u4ed6\u306f\u7834\u68c4\uff09\n$topItems = array_slice($processed, 0, 10);\nunset($processed); \/\/ \u4e0d\u8981\u306b\u306a\u3063\u305f\u5927\u304d\u306a\u914d\u5217\u3092\u89e3\u653e\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-239\">\u914d\u5217\u306e\u30ad\u30fc\u691c\u7d22\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u983b\u7e41\u306b\u7279\u5b9a\u306e\u30ad\u30fc\u3067\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3059\u308b\u5834\u5408\u3001\u691c\u7d22\u7528\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u4f8b\uff08\u6bce\u56de\u30eb\u30fc\u30d7\u3067\u691c\u7d22\uff09\nfunction findItemById($items, $id) {\n    foreach ($items as $item) {\n        if ($item['id'] === $id) {\n            return $item;\n        }\n    }\n    return null;\n}\n\n\/\/ \u6700\u9069\u5316\u4f8b\uff08\u691c\u7d22\u7528\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\uff09\nfunction createSearchIndex($items, $key = 'id') {\n    $index = [];\n    foreach ($items as $item) {\n        if (isset($item[$key])) {\n            $index[$item[$key]] = $item;\n        }\n    }\n    return $index;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$items = fetchItems(); \/\/ \u4f55\u5343\u3082\u306e\u30a2\u30a4\u30c6\u30e0\u3092\u53d6\u5f97\n$itemsById = createSearchIndex($items);\n\n\/\/ O(1)\u306e\u6642\u9593\u8907\u96d1\u5ea6\u3067\u691c\u7d22\u53ef\u80fd\n$item = $itemsById[$targetId] ?? null;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-240\">\u914d\u5217\u306e\u30de\u30fc\u30b8\u3068\u30b9\u30e9\u30a4\u30b9\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p><code>array_merge()<\/code>\u3084<code>array_slice()<\/code>\u306a\u3069\u306e\u95a2\u6570\u306f\u3001\u5927\u304d\u306a\u914d\u5217\u306b\u5bfe\u3057\u3066\u4f7f\u7528\u3059\u308b\u3068\u9ad8\u30b3\u30b9\u30c8\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u4f8b\uff08\u5927\u304d\u306a\u914d\u5217\u306b\u5bfe\u3059\u308b\u591a\u6570\u306e\u30de\u30fc\u30b8\u64cd\u4f5c\uff09\n$finalArray = [];\nforeach ($dataSources as $source) {\n    $data = fetchDataFromSource($source); \/\/ \u5927\u91cf\u306e\u30c7\u30fc\u30bf\n    $finalArray = array_merge($finalArray, $data);\n}\n\n\/\/ \u6700\u9069\u5316\u4f8b\uff08SplFixedArray\u3092\u4f7f\u7528\uff09\n$totalSize = calculateTotalSize($dataSources);\n$finalArray = new SplFixedArray($totalSize);\n$position = 0;\n\nforeach ($dataSources as $source) {\n    $data = fetchDataFromSource($source);\n    $count = count($data);\n    \n    \/\/ \u624b\u52d5\u3067\u30b3\u30d4\u30fc\n    for ($i = 0; $i &lt; $count; $i++) {\n        $finalArray[$position + $i] = $data[$i];\n    }\n    \n    $position += $count;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-241\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6e2c\u5b9a\u3068\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u3092\u6700\u9069\u5316\u3059\u308b\u524d\u306b\u3001\u5b9f\u969b\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6e2c\u5b9a\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-242\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6e2c\u5b9a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6e2c\u5b9a\u3059\u308b\u95a2\u6570\nfunction measurePerformance($callback, $iterations = 1) {\n    \/\/ \u958b\u59cb\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u6642\u9593\u3092\u8a18\u9332\n    $startMemory = memory_get_usage();\n    $startTime = microtime(true);\n    \n    \/\/ \u51e6\u7406\u3092\u5b9f\u884c\uff08\u53cd\u5fa9\u56de\u6570\u5206\uff09\n    $result = null;\n    for ($i = 0; $i &lt; $iterations; $i++) {\n        $result = $callback();\n    }\n    \n    \/\/ \u7d42\u4e86\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u6642\u9593\u3092\u8a18\u9332\n    $endMemory = memory_get_usage();\n    $endTime = microtime(true);\n    \n    \/\/ \u7d50\u679c\u3092\u8fd4\u3059\n    return [\n        'memory_used' =&gt; $endMemory - $startMemory,\n        'peak_memory' =&gt; memory_get_peak_usage(),\n        'time' =&gt; ($endTime - $startTime) \/ $iterations,\n        'result' =&gt; $result\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$arraySize = 100000;\n$testArray = range(1, $arraySize);\n\n\/\/ array_map\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6e2c\u5b9a\n$mapResult = measurePerformance(function() use ($testArray) {\n    return array_map(function($x) { return $x * 2; }, $testArray);\n});\n\n\/\/ foreach\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6e2c\u5b9a\n$foreachResult = measurePerformance(function() use ($testArray) {\n    $result = [];\n    foreach ($testArray as $value) {\n        $result[] = $value * 2;\n    }\n    return $result;\n});\n\n\/\/ \u7d50\u679c\u3092\u8868\u793a\necho \"array_map: \" . number_format($mapResult['time'] * 1000, 2) . \"ms, \" . \n     formatBytes($mapResult['memory_used']) . \"\\n\";\n\necho \"foreach: \" . number_format($foreachResult['time'] * 1000, 2) . \"ms, \" . \n     formatBytes($foreachResult['memory_used']) . \"\\n\";\n\n\/\/ \u30d0\u30a4\u30c8\u6570\u3092\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u95a2\u6570\nfunction formatBytes($bytes) {\n    $units = ['B', 'KB', 'MB', 'GB'];\n    $i = 0;\n    while ($bytes &gt;= 1024 &amp;&amp; $i &lt; count($units) - 1) {\n        $bytes \/= 1024;\n        $i++;\n    }\n    return round($bytes, 2) . ' ' . $units[$i];\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-243\">\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u3088\u308a\u8a73\u7d30\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5206\u6790\u306b\u306f\u3001Xdebug\u306a\u3069\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Xdebug\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u306e\u6709\u52b9\u5316\uff08php.ini\u307e\u305f\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u8a2d\u5b9a\uff09\nini_set('xdebug.profiler_enable', '1');\nini_set('xdebug.profiler_output_dir', '\/tmp');\n\n\/\/ \u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u5bfe\u8c61\u306e\u30b3\u30fc\u30c9\n$largeArray = range(1, 1000000);\nprocessLargeArray($largeArray);\n\n\/\/ \u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u7d50\u679c\u306fXdebug\u304c\u6307\u5b9a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u51fa\u529b\n\/\/ WinCacheGrind\u3084KCacheGrind\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067\u5206\u6790\u53ef\u80fd\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-244\">\u6700\u9069\u5316\u306e\u5b9f\u8df5\u4f8b\uff1a\u914d\u5217\u64cd\u4f5c\u306e\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u57fa\u3065\u3044\u305f\u6700\u9069\u5316\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-245\">\u30b1\u30fc\u30b91\uff1a\u5927\u91cf\u306eJSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6700\u9069\u5316\u524d\uff1a\u3059\u3079\u3066\u306eJSON\u3092\u4e00\u5ea6\u306b\u51e6\u7406\nfunction processJsonFilesInefficient($directory) {\n    $files = glob(\"$directory\/*.json\");\n    $allData = [];\n    \n    \/\/ \u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\n    foreach ($files as $file) {\n        $content = file_get_contents($file);\n        $data = json_decode($content, true);\n        $allData = array_merge($allData, $data);\n    }\n    \n    \/\/ \u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\n    $result = [];\n    foreach ($allData as $item) {\n        $result[] = processItem($item);\n    }\n    \n    return $result;\n}\n\n\/\/ \u6700\u9069\u5316\u5f8c\uff1a\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u30661\u30d5\u30a1\u30a4\u30eb\u305a\u3064\u51e6\u7406\nfunction processJsonFiles($directory) {\n    $files = glob(\"$directory\/*.json\");\n    $result = [];\n    \n    \/\/ 1\u30d5\u30a1\u30a4\u30eb\u305a\u3064\u51e6\u7406\n    foreach ($files as $file) {\n        $content = file_get_contents($file);\n        $data = json_decode($content, true);\n        \n        \/\/ \u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u51e6\u7406\u3057\u3066\u7d50\u679c\u3092\u84c4\u7a4d\n        foreach ($data as $item) {\n            $result[] = processItem($item);\n            \n            \/\/ \u5b9a\u671f\u7684\u306a\u30e1\u30e2\u30ea\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\uff09\n            if (count($result) % 1000 === 0) {\n                \/\/ \u9014\u4e2d\u7d50\u679c\u3092\u4fdd\u5b58\u3057\u3066\u914d\u5217\u3092\u7e2e\u5c0f\n                saveIntermediateResults($result);\n                $result = array_slice($result, -100); \/\/ \u6700\u65b0\u306e100\u4ef6\u3060\u3051\u4fdd\u6301\n            }\n        }\n    }\n    \n    return $result;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-246\">\u30b1\u30fc\u30b92\uff1a\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u96c6\u8a08<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6700\u9069\u5316\u524d\uff1a\u3059\u3079\u3066\u306e\u7d50\u679c\u3092\u914d\u5217\u306b\u8aad\u307f\u8fbc\u3093\u3067\u304b\u3089\u51e6\u7406\nfunction aggregateUserDataInefficient($pdo) {\n    $stmt = $pdo-&gt;query(\"SELECT * FROM user_actions WHERE date &gt;= DATE_SUB(NOW(), INTERVAL 1 YEAR)\");\n    $allData = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC);\n    \n    \/\/ \u30e1\u30e2\u30ea\u5185\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3068\u96c6\u8a08\n    $userStats = [];\n    foreach ($allData as $action) {\n        $userId = $action['user_id'];\n        if (!isset($userStats[$userId])) {\n            $userStats[$userId] = [\n                'action_count' =&gt; 0,\n                'total_value' =&gt; 0\n            ];\n        }\n        $userStats[$userId]['action_count']++;\n        $userStats[$userId]['total_value'] += $action['value'];\n    }\n    \n    return $userStats;\n}\n\n\/\/ \u6700\u9069\u5316\u5f8c\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5074\u3067\u96c6\u8a08\u3057\u3001\u7d50\u679c\u3060\u3051\u3092\u53d6\u5f97\nfunction aggregateUserData($pdo) {\n    $query = \"\n        SELECT user_id, \n               COUNT(*) as action_count,\n               SUM(value) as total_value\n        FROM user_actions \n        WHERE date &gt;= DATE_SUB(NOW(), INTERVAL 1 YEAR)\n        GROUP BY user_id\n    \";\n    \n    $stmt = $pdo-&gt;query($query);\n    $userStats = [];\n    \n    \/\/ \u7d50\u679c\u3092\u76f4\u63a5\u30e6\u30fc\u30b6\u30fcID\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\n    while ($row = $stmt-&gt;fetch(PDO::FETCH_ASSOC)) {\n        $userStats[$row['user_id']] = [\n            'action_count' =&gt; $row['action_count'],\n            'total_value' =&gt; $row['total_value']\n        ];\n    }\n    \n    return $userStats;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-247\">\u30b1\u30fc\u30b93\uff1a\u5de8\u5927\u306aCSV\u30c7\u30fc\u30bf\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u5909\u63db<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6700\u9069\u5316\u524d\uff1a\u3059\u3079\u3066\u3092\u4e00\u5ea6\u306b\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\nfunction transformCsvInefficient($inputFile, $outputFile, $transformFunc) {\n    \/\/ \u5168\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3080\n    $content = file_get_contents($inputFile);\n    $lines = explode(\"\\n\", $content);\n    \n    $header = str_getcsv(array_shift($lines));\n    $transformed = [];\n    \n    foreach ($lines as $line) {\n        if (empty($line)) continue;\n        $data = array_combine($header, str_getcsv($line));\n        $transformed[] = $transformFunc($data);\n    }\n    \n    \/\/ \u7d50\u679c\u3092\u66f8\u304d\u8fbc\u3080\n    $fp = fopen($outputFile, 'w');\n    fputcsv($fp, array_keys($transformed[0]));\n    foreach ($transformed as $row) {\n        fputcsv($fp, $row);\n    }\n    fclose($fp);\n}\n\n\/\/ \u6700\u9069\u5316\u5f8c\uff1a\u30b9\u30c8\u30ea\u30fc\u30e0\u3068\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\nfunction transformCsv($inputFile, $outputFile, $transformFunc) {\n    $inHandle = fopen($inputFile, 'r');\n    $outHandle = fopen($outputFile, 'w');\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u3092\u8aad\u307f\u8fbc\u3093\u3067\u66f8\u304d\u8fbc\u3080\n    $header = fgetcsv($inHandle);\n    $firstRow = true;\n    \n    \/\/ 1\u884c\u305a\u3064\u51e6\u7406\n    while (($data = fgetcsv($inHandle)) !== false) {\n        $row = array_combine($header, $data);\n        $transformed = $transformFunc($row);\n        \n        \/\/ \u5909\u63db\u5f8c\u306e\u6700\u521d\u306e\u884c\u304b\u3089\u30d8\u30c3\u30c0\u30fc\u3092\u751f\u6210\n        if ($firstRow) {\n            fputcsv($outHandle, array_keys($transformed));\n            $firstRow = false;\n        }\n        \n        fputcsv($outHandle, $transformed);\n    }\n    \n    fclose($inHandle);\n    fclose($outHandle);\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-248\">\u914d\u5217\u306e\u4ee3\u66ff\u30c7\u30fc\u30bf\u69cb\u9020<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3067\u306f\u3001\u6a19\u6e96\u306e\u914d\u5217\u3088\u308a\u3082\u7279\u5316\u3057\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3059\u308b\u3068\u52b9\u7387\u7684\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-249\">SPL \u30c7\u30fc\u30bf\u69cb\u9020<\/h4>\n\n\n\n<p>PHP\u306eStandard PHP Library\uff08SPL\uff09\u306f\u3001\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u56fa\u5b9a\u30b5\u30a4\u30ba\u306e\u914d\u5217\uff08\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u3044\uff09\n$fixedArray = new SplFixedArray(1000000);\nfor ($i = 0; $i &lt; 1000000; $i++) {\n    $fixedArray[$i] = $i * 2;\n}\n\n\/\/ \u512a\u5148\u5ea6\u30ad\u30e5\u30fc\uff08\u512a\u5148\u9806\u4f4d\u306b\u57fa\u3065\u3044\u3066\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059\uff09\n$queue = new SplPriorityQueue();\n$queue-&gt;insert(\"Task 1\", 10);\n$queue-&gt;insert(\"Task 2\", 50);\n$queue-&gt;insert(\"Task 3\", 30);\n\nwhile (!$queue-&gt;isEmpty()) {\n    echo $queue-&gt;extract() . \"\\n\"; \/\/ \u512a\u5148\u5ea6\u306e\u9ad8\u3044\u9806\u306b\u53d6\u308a\u51fa\u3059\n}\n\n\/\/ \u30c0\u30d6\u30eb\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\uff08\u8981\u7d20\u306e\u633f\u5165\u30fb\u524a\u9664\u304c\u9ad8\u901f\uff09\n$list = new SplDoublyLinkedList();\nfor ($i = 0; $i &lt; 10; $i++) {\n    $list-&gt;push($i);\n}\n\n\/\/ \u4e2d\u9593\u306b\u8981\u7d20\u3092\u633f\u5165\uff08\u914d\u5217\u3088\u308a\u3082\u52b9\u7387\u7684\uff09\n$list-&gt;add(5, \"inserted\");\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-250\">\u30ab\u30b9\u30bf\u30e0\u30a4\u30c6\u30ec\u30fc\u30bf<\/h4>\n\n\n\n<p>\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30ab\u30b9\u30bf\u30e0\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u30a4\u30c6\u30ec\u30fc\u30c8\u3059\u308b\u30ab\u30b9\u30bf\u30e0\u30a4\u30c6\u30ec\u30fc\u30bf\nclass CsvIterator implements Iterator {\n    protected $file;\n    protected $key = 0;\n    protected $current;\n    protected $header;\n    \n    public function __construct($file) {\n        $this-&gt;file = fopen($file, 'r');\n        $this-&gt;header = fgetcsv($this-&gt;file);\n    }\n    \n    public function __destruct() {\n        fclose($this-&gt;file);\n    }\n    \n    public function rewind() {\n        rewind($this-&gt;file);\n        $this-&gt;header = fgetcsv($this-&gt;file);\n        $this-&gt;key = 0;\n        $this-&gt;current = $this-&gt;readRow();\n    }\n    \n    public function valid() {\n        return $this-&gt;current !== false;\n    }\n    \n    public function key() {\n        return $this-&gt;key;\n    }\n    \n    public function current() {\n        return $this-&gt;current;\n    }\n    \n    public function next() {\n        $this-&gt;current = $this-&gt;readRow();\n        $this-&gt;key++;\n    }\n    \n    protected function readRow() {\n        $row = fgetcsv($this-&gt;file);\n        if ($row === false) {\n            return false;\n        }\n        return array_combine($this-&gt;header, $row);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$iterator = new CsvIterator('large_data.csv');\nforeach ($iterator as $row) {\n    \/\/ \u5404\u884c\u3092\u51e6\u7406\n    processRow($row);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-251\">\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u6c38\u7d9a\u5316<\/h4>\n\n\n\n<p>\u4e00\u6642\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u3057\u3066Redis\u3084Memcached\u306a\u3069\u306e\u5916\u90e8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Redis\u3092\u4f7f\u3063\u305f\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\nfunction processLargeDataWithRedis($dataSource) {\n    $redis = new Redis();\n    $redis-&gt;connect('127.0.0.1', 6379);\n    \n    \/\/ \u30c7\u30fc\u30bf\u3092Redis\u306b\u4fdd\u5b58\n    foreach ($dataSource as $id =&gt; $data) {\n        $redis-&gt;hSet('large_data', $id, json_encode($data));\n    }\n    \n    \/\/ \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u3067\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u51e6\u7406\n    $keys = $redis-&gt;hKeys('large_data');\n    $batchSize = 1000;\n    \n    for ($i = 0; $i &lt; count($keys); $i += $batchSize) {\n        $batch = array_slice($keys, $i, $batchSize);\n        \n        \/\/ \u30d0\u30c3\u30c1\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n        $multiData = $redis-&gt;hMGet('large_data', $batch);\n        \n        \/\/ \u30c7\u30fc\u30bf\u3092\u51e6\u7406\n        foreach ($multiData as $id =&gt; $jsonData) {\n            $data = json_decode($jsonData, true);\n            processItem($id, $data);\n            \n            \/\/ \u51e6\u7406\u6e08\u307f\u306e\u30c7\u30fc\u30bf\u3092\u524a\u9664\n            $redis-&gt;hDel('large_data', $id);\n        }\n    }\n}\n<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u914d\u5217\u64cd\u4f5c\u306f\u3001\u5927\u898f\u6a21\u306aPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u6700\u9069\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u9078\u629e\u3059\u308b\u969b\u306f\u3001\u30c7\u30fc\u30bf\u306e\u30b5\u30a4\u30ba\u3001\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3001\u304a\u3088\u3073\u51e6\u7406\u8981\u4ef6\u3092\u8003\u616e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u306b\u95a2\u9023\u3059\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002## \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u914d\u5217\u64cd\u4f5c<\/p>\n\n\n\n<p>PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u306f\u3001\u914d\u5217\u64cd\u4f5c\u306e\u6700\u9069\u5316\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u6271\u3046\u5834\u5408\u3001\u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406\u304c\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u5b9f\u884c\u901f\u5ea6\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u914d\u5217\u306e\u6700\u9069\u306a\u4f7f\u3044\u65b9\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u6280\u8853\u3001\u304a\u3088\u3073\u4e00\u822c\u7684\u306a\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3068\u305d\u306e\u89e3\u6d88\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-252\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u914d\u5217\u306e\u6700\u9069\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u5358\u7d14\u306b\u5168\u30c7\u30fc\u30bf\u3092\u914d\u5217\u306b\u8aad\u307f\u8fbc\u3080\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u30e1\u30e2\u30ea\u4e0d\u8db3\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-253\">\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306b\u3088\u308b\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u5411\u4e0a<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u5c0f\u3055\u306a\u30c1\u30e3\u30f3\u30af\uff08\u584a\uff09\u306b\u5206\u3051\u3066\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u5c11\u3057\u305a\u3064\u51e6\u7406\u3059\u308b\u4f8b\nfunction processLargeCsv($filename, $chunkSize = 1000) {\n    $handle = fopen($filename, 'r');\n    if (!$handle) return false;\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n    $header = fgetcsv($handle);\n    \n    $processedRows = 0;\n    $chunk = [];\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u30921\u884c\u305a\u3064\u8aad\u307f\u8fbc\u3080\n    while (($row = fgetcsv($handle)) !== false) {\n        \/\/ \u884c\u3092\u30d8\u30c3\u30c0\u30fc\u3068\u95a2\u9023\u4ed8\u3051\u308b\n        $chunk[] = array_combine($header, $row);\n        $processedRows++;\n        \n        \/\/ \u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306b\u9054\u3057\u305f\u3089\u51e6\u7406\n        if (count($chunk) &gt;= $chunkSize) {\n            processChunk($chunk);\n            $chunk = []; \/\/ \u30e1\u30e2\u30ea\u3092\u89e3\u653e\n            echo \"Processed $processedRows rows...\\n\";\n        }\n    }\n    \n    \/\/ \u6b8b\u308a\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\n    if (!empty($chunk)) {\n        processChunk($chunk);\n    }\n    \n    fclose($handle);\n    return $processedRows;\n}\n\n\/\/ \u30c1\u30e3\u30f3\u30af\u3092\u51e6\u7406\u3059\u308b\u95a2\u6570\nfunction processChunk($rows) {\n    \/\/ \u30c1\u30e3\u30f3\u30af\u30c7\u30fc\u30bf\u306e\u51e6\u7406\uff08\u4f8b\uff1a\u96c6\u8a08\u3001\u5909\u63db\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4fdd\u5b58\u306a\u3069\uff09\n    foreach ($rows as $row) {\n        \/\/ \u5404\u884c\u306e\u51e6\u7406\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$totalRows = processLargeCsv('large_data.csv', 5000);\necho \"Total processed rows: $totalRows\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-254\">\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u305f\u9045\u5ef6\u8a55\u4fa1<\/h4>\n\n\n\n<p>\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\uff08Generator\uff09\u306f\u3001\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u4e2d\u306b\u5024\u3092\u4e00\u3064\u305a\u3064\u751f\u6210\u3059\u308b\u305f\u3081\u3001\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\nfunction csvRows($filename) {\n    $handle = fopen($filename, 'r');\n    if (!$handle) return;\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n    $header = fgetcsv($handle);\n    \n    \/\/ \u5404\u884c\u3092\u5fc5\u8981\u306a\u6642\u3060\u3051\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\n    while (($row = fgetcsv($handle)) !== false) {\n        yield array_combine($header, $row);\n    }\n    \n    fclose($handle);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$totalAmount = 0;\nforeach (csvRows('sales.csv') as $index =&gt; $row) {\n    $totalAmount += $row['amount'];\n    \n    \/\/ \u51e6\u7406\u306e\u9032\u6357\u8868\u793a\uff0810,000\u884c\u3054\u3068\uff09\n    if ($index % 10000 === 0) {\n        echo \"Processed \" . number_format($index) . \" rows...\\n\";\n    }\n}\necho \"Total sales amount: \" . number_format($totalAmount, 2) . \"\\n\";\n<\/pre>\n\n\n\n<p>\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u5229\u70b9\u306f\u3001\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u307e\u306a\u304f\u3066\u3082\u3001\u901a\u5e38\u306eforeach\u30eb\u30fc\u30d7\u3068\u540c\u3058\u69cb\u6587\u3067\u51e6\u7406\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-255\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0<\/h4>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u7d50\u679c\u3092\u6271\u3046\u5834\u5408\u3001\u5168\u7d50\u679c\u3092\u30d5\u30a7\u30c3\u30c1\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u65b9\u5f0f\u3067\u51e6\u7406\u3059\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PDO\u3092\u4f7f\u3063\u305f\u7d50\u679c\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\nfunction streamQueryResults($pdo, $query, $params = []) {\n    $statement = $pdo-&gt;prepare($query);\n    $statement-&gt;execute($params);\n    \n    \/\/ \u884c\u3092\u4e00\u3064\u305a\u3064\u30d5\u30a7\u30c3\u30c1\n    while ($row = $statement-&gt;fetch(PDO::FETCH_ASSOC)) {\n        yield $row;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$pdo = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');\n$pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n\n$query = \"SELECT * FROM large_table WHERE status = ?\";\n$results = streamQueryResults($pdo, $query, ['active']);\n\nforeach ($results as $row) {\n    \/\/ \u5404\u884c\u306e\u51e6\u7406\n    processRow($row);\n}\n<\/pre>\n\n\n\n<p>MySQLi\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3082\u3001<code>mysqli_stmt_get_result()<\/code>\u306e\u4ee3\u308f\u308a\u306b<code>mysqli_stmt_bind_result()<\/code>\u3068<code>mysqli_stmt_fetch()<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u540c\u69d8\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u51e6\u7406\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-256\">\u5916\u90e8\u30c4\u30fc\u30eb\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u5909\u63db\u3084\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001PHP\u306e\u4ee3\u308f\u308a\u306bUNIX\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\uff08awk\u3001sed\u3001sort\u306a\u3069\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u691c\u8a0e\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ UNIX\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u5de8\u5927\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u4f8b\nfunction filterLargeCsvWithUnixTools($inputFile, $outputFile, $column, $value) {\n    $command = \"awk -F, '\\$\" . ($column + 1) . \" == \\\"$value\\\" || NR == 1' $inputFile &gt; $outputFile\";\n    exec($command, $output, $returnCode);\n    return $returnCode === 0;\n}\n\n\/\/ 10GB\u306eCSV\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u7279\u5b9a\u306e\u5024\u3092\u6301\u3064\u884c\u3092\u62bd\u51fa\n$success = filterLargeCsvWithUnixTools('huge_data.csv', 'filtered_data.csv', 3, 'target_value');\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-257\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>PHP\u306f\u81ea\u52d5\u7684\u306b\u30e1\u30e2\u30ea\u3092\u7ba1\u7406\u3057\u307e\u3059\u304c\u3001\u5927\u304d\u306a\u914d\u5217\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u610f\u8b58\u7684\u306b\u5236\u5fa1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-258\">\u53c2\u7167\u6e21\u3057\u3092\u6d3b\u7528\u3057\u305f\u30e1\u30e2\u30ea\u7bc0\u7d04<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u3092\u30b3\u30d4\u30fc\u305b\u305a\u306b\u51e6\u7406\u3059\u308b\u306b\u306f\u3001\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u60aa\u3044\u4f8b\uff08\u5024\u306e\u30b3\u30d4\u30fc\u304c\u767a\u751f\uff09\nfunction processArrayInefficient($data) {\n    \/\/ $data\u306f\u5143\u306e\u914d\u5217\u306e\u30b3\u30d4\u30fc\n    foreach ($data as $key =&gt; $value) {\n        $data[$key] = transform($value);\n    }\n    return $data;\n}\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u4f8b\uff08\u53c2\u7167\u6e21\u3057\uff09\nfunction processArrayEfficient(&amp;$data) {\n    \/\/ $data\u306f\u5143\u306e\u914d\u5217\u3078\u306e\u53c2\u7167\n    foreach ($data as $key =&gt; &amp;$value) {\n        $value = transform($value);\n    }\n    unset($value); \/\/ \u53c2\u7167\u3092\u89e3\n<\/pre>\n\n\n\n<p>$user = [\u201cid\u201d =&gt; 1, \u201cemail\u201d =&gt; \u201cuser@example.com\u201d];<\/p>\n\n\n\n<p>\/\/ \u65b9\u6cd51: \u6761\u4ef6\u5206\u5c90\u3067\u78ba\u8a8d if (isset($user[\u201cname\u201d])) { echo $user[\u201cname\u201d]; } else { echo \u201c\u540d\u524d\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u201d; }<\/p>\n\n\n\n<p>\/\/ \u65b9\u6cd52: \u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528 echo isset($user[\u201cname\u201d]) ? $user[\u201cname\u201d] : \u201c\u540d\u524d\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u201d;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n`isset()`\u95a2\u6570\u306f\u5909\u6570\u304c\u5b58\u5728\u3057\u3001\u304b\u3064`null`\u3067\u306a\u3044\u5834\u5408\u306b`true`\u3092\u8fd4\u3057\u307e\u3059\u3002\u914d\u5217\u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\u306b\u306f\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u308f\u308c\u308b\u65b9\u6cd5\u3067\u3059\u3002\n\n#### \u5bfe\u51e6\u6cd52: null\u5408\u4f53\u6f14\u7b97\u5b50\uff08PHP 7.0\u4ee5\u964d\uff09\n\n```php\n$user = [\"id\" =&gt; 1, \"email\" =&gt; \"user@example.com\"];\n\n\/\/ PHP 7.0\u4ee5\u964d\u306enull\u5408\u4f53\u6f14\u7b97\u5b50\n$name = $user[\"name\"] ?? \"\u540d\u524d\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";\necho $name;\n\n\/\/ \u8907\u6570\u306e\u5019\u88dc\u304b\u3089\u6700\u521d\u306b\u5b58\u5728\u3059\u308b\u5024\u3092\u4f7f\u7528\n$displayName = $user[\"display_name\"] ?? $user[\"username\"] ?? $user[\"email\"] ?? \"\u4e0d\u660e\u306a\u30e6\u30fc\u30b6\u30fc\";\n<\/pre>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\uff08<code>??<\/code>\uff09\u306f\u3001\u5de6\u5074\u306e\u5024\u304c\u5b58\u5728\u305b\u305aNOTICE\u304c\u767a\u751f\u3059\u308b\u5834\u5408\u3084\u3001<code>null<\/code>\u306e\u5834\u5408\u306b\u53f3\u5074\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u304c\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-259\">\u5bfe\u51e6\u6cd53: array_key_exists()\u306e\u4f7f\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\"id\" =&gt; 1, \"email\" =&gt; \"user@example.com\", \"status\" =&gt; null];\n\n\/\/ array_key_exists()\u306f\u30ad\u30fc\u306e\u5b58\u5728\u306e\u307f\u3092\u78ba\u8a8d\nif (array_key_exists(\"status\", $user)) {\n    echo \"\u30b9\u30c6\u30fc\u30bf\u30b9\u30ad\u30fc\u306f\u5b58\u5728\u3057\u307e\u3059\";\n} else {\n    echo \"\u30b9\u30c6\u30fc\u30bf\u30b9\u30ad\u30fc\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\";\n}\n\n\/\/ isset()\u3068\u306e\u9055\u3044: null\u306e\u6271\u3044\nvar_dump(isset($user[\"status\"]));         \/\/ bool(false) - null\u306ffalse\u3068\u307f\u306a\u3055\u308c\u308b\nvar_dump(array_key_exists(\"status\", $user)); \/\/ bool(true) - \u30ad\u30fc\u306f\u5b58\u5728\u3059\u308b\n<\/pre>\n\n\n\n<p><code>array_key_exists()<\/code>\u306f<code>isset()<\/code>\u3068\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u5024\u304c<code>null<\/code>\u306e\u5834\u5408\u3067\u3082<code>true<\/code>\u3092\u8fd4\u3059\u70b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-260\">\u5bfe\u51e6\u6cd54: @\u6f14\u7b97\u5b50\uff08\u975e\u63a8\u5968\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u6291\u5236\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n$name = @$user[\"name\"];\n<\/pre>\n\n\n\n<p>\u30a8\u30e9\u30fc\u6291\u5236\u6f14\u7b97\u5b50\uff08<code>@<\/code>\uff09\u306f\u3001\u305d\u306e\u884c\u3067\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3092\u6291\u5236\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u304c\u3042\u308a\u3001\u554f\u984c\u306e\u6839\u672c\u7684\u306a\u89e3\u6c7a\u306b\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u901a\u5e38\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-261\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\uff1a\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u524d\u306b\u5e38\u306b\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046<\/li>\n\n\n\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u6d3b\u7528<\/strong>\uff1anull\u5408\u4f53\u6f14\u7b97\u5b50\u3084isset()\u3068\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u5831\u544a\u30ec\u30d9\u30eb\u306e\u6d3b\u7528<\/strong>\uff1a\u958b\u767a\u4e2d\u306f<code>E_ALL<\/code>\u3092\u6709\u52b9\u306b\u3057\u3066\u5168\u3066\u306e\u30a8\u30e9\u30fc\u3092\u8868\u793a\u3057\u3001\u554f\u984c\u3092\u65e9\u671f\u306b\u767a\u898b\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u958b\u767a\u74b0\u5883\u3067\u306f\u5168\u3066\u306e\u30a8\u30e9\u30fc\u3092\u8868\u793a\nerror_reporting(E_ALL);\nini_set('display_errors', 1);\n\n\/\/ \u672c\u756a\u74b0\u5883\u3067\u306f\u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3057\u3001\u8868\u793a\u3057\u306a\u3044\nerror_reporting(E_ALL);\nini_set('display_errors', 0);\nini_set('log_errors', 1);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-262\">\u201cInvalid argument supplied for foreach()\u201d\u306e\u89e3\u6c7a\u7b56<\/h3>\n\n\n\n<p><code>Invalid argument supplied for foreach()<\/code>\u30a8\u30e9\u30fc\u306f\u3001foreach\u30eb\u30fc\u30d7\u306b\u914d\u5217\u307e\u305f\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4ee5\u5916\u306e\u5024\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Warning: Invalid argument supplied for foreach() in \/path\/to\/file.php on line 15\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-263\">\u30a8\u30e9\u30fc\u306e\u539f\u56e0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = null; \/\/ \u307e\u305f\u306f false, \u6574\u6570, \u6587\u5b57\u5217\u306a\u3069\nforeach ($data as $item) { \/\/ Invalid argument supplied for foreach()\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u4e3b\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u767a\u751f\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u304c\u5931\u6557\u3057\u3066\u914d\u5217\u3067\u306f\u306a\u304f<code>false<\/code>\u3084<code>null<\/code>\u3092\u8fd4\u3059\u5834\u5408<\/li>\n\n\n\n<li>\u5909\u6570\u304c\u4e88\u671f\u305b\u305a\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408<\/li>\n\n\n\n<li>API\u3084DB\u30af\u30a8\u30ea\u306e\u7d50\u679c\u304c\u671f\u5f85\u901a\u308a\u3067\u306a\u3044\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-264\">\u5bfe\u51e6\u6cd51: \u578b\u30c1\u30a7\u30c3\u30af\u3068\u7a7a\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = getData(); \/\/ \u4f55\u3089\u304b\u306e\u95a2\u6570\u304b\u3089\u5024\u3092\u53d6\u5f97\n\n\/\/ \u65b9\u6cd51: is_array()\u306b\u3088\u308b\u578b\u30c1\u30a7\u30c3\u30af\nif (is_array($data)) {\n    foreach ($data as $item) {\n        \/\/ \u51e6\u7406\n    }\n} else {\n    \/\/ \u30c7\u30fc\u30bf\u304c\u914d\u5217\u3067\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    echo \"\u6709\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\";\n}\n\n\/\/ \u65b9\u6cd52: is_iterable()\u306b\u3088\u308b\u30c1\u30a7\u30c3\u30af\uff08PHP 7.1\u4ee5\u964d\uff09\nif (is_iterable($data)) {\n    foreach ($data as $item) {\n        \/\/ \u51e6\u7406\uff08\u914d\u5217\u307e\u305f\u306fTraversable\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\n    }\n}\n<\/pre>\n\n\n\n<p><code>is_array()<\/code>\u95a2\u6570\u306f\u5024\u304c\u914d\u5217\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002PHP 7.1\u4ee5\u964d\u3067\u306f\u3001<code>is_iterable()<\/code>\u3092\u4f7f\u3046\u3068\u914d\u5217\u3068Traversable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e21\u65b9\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-265\">\u5bfe\u51e6\u6cd52: \u7a7a\u914d\u5217\u3078\u306e\u521d\u671f\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30fc\u30bf\u304c\u5f97\u3089\u308c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u7a7a\u914d\u5217\u3092\u4f7f\u7528\n$data = getData() ?: [];\n\n\/\/ \u307e\u305f\u306f\n$data = getData();\nif (!is_array($data)) {\n    $data = [];\n}\n\n\/\/ \u3053\u308c\u3067foreach\u306f\u5b89\u5168\u306b\u5b9f\u884c\u3067\u304d\u308b\uff08\u305f\u3060\u3057\u4f55\u3082\u51e6\u7406\u3055\u308c\u306a\u3044\uff09\nforeach ($data as $item) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u5909\u6570\u3092\u5e38\u306b\u7a7a\u914d\u5217\u306b\u521d\u671f\u5316\u3057\u3066\u304a\u3051\u3070\u3001\u30eb\u30fc\u30d7\u306f\u5b89\u5168\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\uff08\u305f\u3060\u3057\u51e6\u7406\u306f\u884c\u308f\u308c\u307e\u305b\u3093\uff09\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-266\">\u5bfe\u51e6\u6cd53: null\u5408\u4f53\u6f14\u7b97\u5b50\u306e\u4f7f\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u95a2\u6570\u306e\u623b\u308a\u5024\u304cnull\u306e\u5834\u5408\u306f\u7a7a\u914d\u5217\u3092\u4f7f\u7528\n$data = fetchData() ?? [];\n\nforeach ($data as $item) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-267\">\u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u9069\u5207\u306b\u8a2d\u8a08\u3059\u308b<\/h4>\n\n\n\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u3092\u9632\u3050\u306b\u306f\u3001\u95a2\u6570\u304c\u5e38\u306b\u4e00\u8cab\u3057\u305f\u578b\u3092\u8fd4\u3059\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u8a2d\u8a08\uff1a\u6761\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u578b\u3092\u8fd4\u3059\nfunction getBadData($id) {\n    if (!$id) {\n        return false; \/\/ \u6570\u5024\u4ee5\u5916\u306eID\u306f\u4e0d\u6b63\n    }\n    \n    $data = fetchFromDatabase($id);\n    if (empty($data)) {\n        return null; \/\/ \u30c7\u30fc\u30bf\u304c\u898b\u3064\u304b\u3089\u306a\u3044\n    }\n    \n    return $data; \/\/ \u914d\u5217\u3092\u8fd4\u3059\n}\n\n\/\/ \u826f\u3044\u8a2d\u8a08\uff1a\u5e38\u306b\u914d\u5217\u3092\u8fd4\u3059\nfunction getGoodData($id) {\n    if (!$id) {\n        return []; \/\/ \u5e38\u306b\u7a7a\u914d\u5217\u3092\u8fd4\u3059\n    }\n    \n    $data = fetchFromDatabase($id);\n    if (empty($data)) {\n        return []; \/\/ \u5e38\u306b\u7a7a\u914d\u5217\u3092\u8fd4\u3059\n    }\n    \n    return $data; \/\/ \u914d\u5217\u3092\u8fd4\u3059\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-268\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u306eAPI\u8a2d\u8a08<\/strong>\uff1a\u95a2\u6570\u306f\u5e38\u306b\u4e00\u8cab\u3057\u305f\u578b\u3092\u8fd4\u3059\u3088\u3046\u306b\u3059\u308b<\/li>\n\n\n\n<li><strong>\u4e8b\u524d\u306e\u578b\u30c1\u30a7\u30c3\u30af<\/strong>\uff1aforeach\u3092\u4f7f\u7528\u3059\u308b\u524d\u306b<code>is_array()<\/code>\u307e\u305f\u306f<code>is_iterable()<\/code>\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/li>\n\n\n\n<li><strong>\u5b89\u5168\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/strong>\uff1a\u914d\u5217\u304c\u671f\u5f85\u3055\u308c\u308b\u5834\u6240\u3067\u306f\u3001\u30a8\u30e9\u30fc\u6642\u306b\u7a7a\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0<\/strong>\uff1aPHP 7\u4ee5\u964d\u3067\u306f\u5f15\u6570\u3068\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-269\">\u914d\u5217\u64cd\u4f5c\u6642\u306e\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\uff08\u578b\u5ba3\u8a00\uff09\u3092\u4f7f\u7528\u3057\u3066\u591a\u304f\u306e\u914d\u5217\u95a2\u9023\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-270\">\u5f15\u6570\u306e\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u578b\u3092\u5ba3\u8a00\nfunction processItems(array $items) {\n    foreach ($items as $item) {\n        \/\/ $items\u306f\u5fc5\u305a\u914d\u5217\u3067\u3042\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u305f\u3081\u3001\n        \/\/ \"Invalid argument supplied for foreach()\"\u30a8\u30e9\u30fc\u306f\u767a\u751f\u3057\u306a\u3044\n        echo $item . \"\\n\";\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nprocessItems([1, 2, 3]); \/\/ \u6b63\u5e38\u306b\u52d5\u4f5c\n\nprocessItems(\"not an array\"); \/\/ TypeError: Argument 1 passed to processItems() must be of the type array, string given\n<\/pre>\n\n\n\n<p>\u578b\u5ba3\u8a00\u306b\u3088\u308a\u3001\u95a2\u6570\u306b\u6e21\u3055\u308c\u308b\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u305f\u578b\u3067\u306a\u3044\u5834\u5408\u306b<code>TypeError<\/code>\u304c\u30b9\u30ed\u30fc\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u65e9\u671f\u306b\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-271\">\u53ef\u7a7a\u578b\uff08PHP 7.1\u4ee5\u964d\uff09<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u307e\u305f\u306fnull\u3092\u8a31\u5bb9\nfunction processData(?array $data) {\n    \/\/ null\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\n    if ($data === null) {\n        return;\n    }\n    \n    foreach ($data as $item) {\n        \/\/ \u51e6\u7406\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nprocessData([1, 2, 3]); \/\/ \u6b63\u5e38\u306b\u52d5\u4f5c\nprocessData(null);      \/\/ \u6b63\u5e38\u306b\u52d5\u4f5c\nprocessData(\"string\");  \/\/ TypeError\n<\/pre>\n\n\n\n<p>\u578b\u306e\u524d\u306b<code>?<\/code>\u3092\u4ed8\u3051\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u578b\u307e\u305f\u306f<code>null<\/code>\u3092\u8a31\u5bb9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-272\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u623b\u308a\u5024\u306e\u578b\u3092\u5ba3\u8a00\nfunction getUsers(int $limit): array {\n    $users = fetchUsersFromDatabase($limit);\n    \n    \/\/ \u5fc5\u305a\u914d\u5217\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u3042\u308b\n    if (!is_array($users)) {\n        return []; \/\/ \u7a7a\u914d\u5217\u3092\u8fd4\u3057\u3066\u578b\u3092\u4e00\u81f4\u3055\u305b\u308b\n    }\n    \n    return $users;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$users = getUsers(10);\n\/\/ $users\u306f\u5fc5\u305a\u914d\u5217\u306a\u306e\u3067\u3001\u5b89\u5168\u306bforeach\u3067\u51e6\u7406\u3067\u304d\u308b\nforeach ($users as $user) {\n    echo $user['name'] . \"\\n\";\n}\n<\/pre>\n\n\n\n<p>\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u306b\u3088\u308a\u3001\u95a2\u6570\u304c\u6307\u5b9a\u3055\u308c\u305f\u578b\u306e\u5024\u3092\u8fd4\u3059\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-273\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u3063\u305f\u9ad8\u5ea6\u306a\u578b\u5236\u7d04<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u53cd\u5fa9\u53ef\u80fd\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u5236\u7d04\nfunction processIterable(iterable $items) {\n    foreach ($items as $key =&gt; $value) {\n        echo \"$key: $value\\n\";\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nprocessIterable([1, 2, 3]);           \/\/ \u914d\u5217\u306f\u53ef\u80fd\nprocessIterable(new ArrayIterator([1, 2, 3])); \/\/ Traversable\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3082\u53ef\u80fd\n<\/pre>\n\n\n\n<p><code>iterable<\/code>\u578b\u306f\u3001\u914d\u5217\u307e\u305f\u306f<code>Traversable<\/code>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8a31\u5bb9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-274\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306e\u6d3b\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u53b3\u683c\u5316\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\n *\/\nclass UserCollection implements IteratorAggregate {\n    private $users = [];\n    \n    \/**\n     * \u30e6\u30fc\u30b6\u30fc\u3092\u8ffd\u52a0\n     *\/\n    public function add(User $user): void {\n        $this-&gt;users[] = $user;\n    }\n    \n    \/**\n     * \u53cd\u5fa9\u5b50\u306e\u53d6\u5f97\n     *\/\n    public function getIterator(): Traversable {\n        return new ArrayIterator($this-&gt;users);\n    }\n    \n    \/**\n     * \u5168\u30e6\u30fc\u30b6\u30fc\u306e\u914d\u5217\u3092\u53d6\u5f97\n     *\/\n    public function toArray(): array {\n        return $this-&gt;users;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$collection = new UserCollection();\n$collection-&gt;add(new User('John'));\n$collection-&gt;add(new User('Jane'));\n\n\/\/ \u5b89\u5168\u306b\u53cd\u5fa9\u51e6\u7406\u304c\u53ef\u80fd\nforeach ($collection as $user) {\n    echo $user-&gt;getName() . \"\\n\";\n}\n<\/pre>\n\n\n\n<p>\u5c02\u7528\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u578b\u306e\u5b89\u5168\u6027\u304c\u9ad8\u307e\u308a\u3001\u30c9\u30e1\u30a4\u30f3\u56fa\u6709\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-275\">\u305d\u306e\u4ed6\u306e\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-276\">1. \u30ad\u30fc\u306e\u578b\u5909\u63db\u554f\u984c<\/h4>\n\n\n\n<p>PHP\u306f\u914d\u5217\u306e\u30ad\u30fc\u3092\u81ea\u52d5\u7684\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [\n    '1' =&gt; 'string key',\n    1 =&gt; 'integer key',     \/\/ \u6587\u5b57\u5217\u306e'1'\u3068\u540c\u3058\u30ad\u30fc\u3068\u307f\u306a\u3055\u308c\u308b\n    1.5 =&gt; 'float key',     \/\/ \u6574\u6570\u306e1\u306b\u5909\u63db\u3055\u308c\u308b\n    true =&gt; 'boolean key'   \/\/ \u6574\u6570\u306e1\u306b\u5909\u63db\u3055\u308c\u308b\n];\n\nprint_r($array); \/\/ \u91cd\u8907\u3059\u308b\u30ad\u30fc\u306f\u4e0a\u66f8\u304d\u3055\u308c\u308b\n\/\/ Array ( [1] =&gt; boolean key )\n<\/pre>\n\n\n\n<p><strong>\u5bfe\u51e6\u6cd5<\/strong>\uff1a\u6587\u5b57\u5217\u3068\u6570\u5024\u304c\u6df7\u5728\u3059\u308b\u30ad\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u7279\u306b\u6ce8\u610f\u3057\u3001\u53ef\u80fd\u306a\u9650\u308a\u4e00\u8cab\u3057\u305f\u578b\u306e\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-277\">2. \u53c2\u7167\u6e21\u3057\u306b\u95a2\u9023\u3059\u308b\u554f\u984c<\/h4>\n\n\n\n<p>foreach\u30eb\u30fc\u30d7\u3067\u53c2\u7167\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [1, 2, 3];\n\n\/\/ \u53c2\u7167\u3092\u4f7f\u3063\u305fforeach\nforeach ($array as &amp;$value) {\n    $value *= 2;\n}\n\/\/ $value \u306f\u6700\u5f8c\u306e\u8981\u7d20\u3078\u306e\u53c2\u7167\u306e\u307e\u307e\n\n\/\/ \u540c\u3058\u5909\u6570\u540d\u3067\u5225\u306e\u30eb\u30fc\u30d7\u3092\u5b9f\u884c\nforeach ($array as $value) {\n    \/\/ \u3053\u3053\u3067$value\u306f\u901a\u5e38\u306e\u5909\u6570\u3068\u3057\u3066\u4f7f\u308f\u308c\u308b\u304c\u3001\n    \/\/ \u524d\u306e\u30eb\u30fc\u30d7\u304b\u3089\u53c2\u7167\u304c\u6b8b\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u914d\u5217\u306e\u6700\u5f8c\u306e\u8981\u7d20\u3082\u5909\u66f4\u3055\u308c\u308b\n}\n\nprint_r($array); \/\/ Array ( [0] =&gt; 2 [1] =&gt; 4 [2] =&gt; 2 )\n\/\/ \u6700\u5f8c\u306e\u8981\u7d20\u304c2\u306b\u306a\u3063\u3066\u3044\u308b\uff01\n<\/pre>\n\n\n\n<p><strong>\u5bfe\u51e6\u6cd5<\/strong>\uff1a\u53c2\u7167\u3092\u4f7f\u7528\u3057\u305f\u5f8c\u306f\u3001<code>unset()<\/code>\u3067\u53c2\u7167\u3092\u89e3\u9664\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [1, 2, 3];\n\n\/\/ \u53c2\u7167\u3092\u4f7f\u3063\u305fforeach\nforeach ($array as &amp;$value) {\n    $value *= 2;\n}\nunset($value); \/\/ \u53c2\u7167\u3092\u89e3\u9664\n\n\/\/ \u3053\u308c\u3067\u5b89\u5168\nforeach ($array as $value) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-278\">3. \u591a\u6b21\u5143\u914d\u5217\u306eNull\u53c2\u7167\u30a8\u30e9\u30fc<\/h4>\n\n\n\n<p>\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    'user' =&gt; [\n        'profile' =&gt; [\n            'address' =&gt; 'Tokyo'\n        ]\n    ]\n];\n\n\/\/ \u3053\u308c\u306f\u6b63\u5e38\u306b\u52d5\u4f5c\necho $data['user']['profile']['address'];\n\n\/\/ \u4e2d\u9593\u306e\u8981\u7d20\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u30a8\u30e9\u30fc\necho $data['user']['settings']['theme']; \/\/ Undefined index: settings\n<\/pre>\n\n\n\n<p><strong>\u5bfe\u51e6\u6cd5<\/strong>\uff1a\u591a\u6bb5\u968e\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u307e\u305f\u306fnull\u5408\u4f53\u6f14\u7b97\u5b50\u306e\u9023\u9396\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u65b9\u6cd51: \u6bb5\u968e\u7684\u306a\u30c1\u30a7\u30c3\u30af\nif (isset($data['user']) &amp;&amp; isset($data['user']['settings']) &amp;&amp; isset($data['user']['settings']['theme'])) {\n    echo $data['user']['settings']['theme'];\n} else {\n    echo \"\u30c6\u30fc\u30de\u8a2d\u5b9a\u304c\u3042\u308a\u307e\u305b\u3093\";\n}\n\n\/\/ \u65b9\u6cd52: PHP 7.0\u4ee5\u964d\u306enull\u5408\u4f53\u6f14\u7b97\u5b50\n$theme = $data['user']['settings']['theme'] ?? \"\u30c7\u30d5\u30a9\u30eb\u30c8\u30c6\u30fc\u30de\";\n\n\/\/ \u65b9\u6cd53: PHP 7.0\u4ee5\u964d\u306e\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\nfunction array_get($array, $path, $default = null) {\n    $keys = is_array($path) ? $path : explode('.', $path);\n    $result = $array;\n    \n    foreach ($keys as $key) {\n        if (!is_array($result) || !array_key_exists($key, $result)) {\n            return $default;\n        }\n        $result = $result[$key];\n    }\n    \n    return $result;\n}\n\n\/\/ \u30c9\u30c3\u30c8\u8868\u8a18\u3067\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\n$theme = array_get($data, 'user.settings.theme', '\u30c7\u30d5\u30a9\u30eb\u30c8\u30c6\u30fc\u30de');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-279\">4. \u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6df7\u540c<\/h4>\n\n\n\n<p>\u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u7570\u306a\u308b\u30a2\u30af\u30bb\u30b9\u69cb\u6587\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u6df7\u540c\u3059\u308b\u3068\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = ['name' =&gt; 'John'];\n$object = (object)['name' =&gt; 'John'];\n\necho $array['name'];  \/\/ \u6b63\u5e38: \"John\"\necho $object['name']; \/\/ \u30a8\u30e9\u30fc: Illegal string offset 'name'\n\necho $array-&gt;name;    \/\/ \u30a8\u30e9\u30fc: Trying to get property 'name' of non-object\necho $object-&gt;name;   \/\/ \u6b63\u5e38: \"John\"\n<\/pre>\n\n\n\n<p><strong>\u5bfe\u51e6\u6cd5<\/strong>\uff1a\u5909\u6570\u306e\u578b\u3092\u78ba\u8a8d\u3057\u3001\u9069\u5207\u306a\u30a2\u30af\u30bb\u30b9\u69cb\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = getData(); \/\/ \u914d\u5217\u307e\u305f\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\n\nif (is_array($data)) {\n    echo $data['name'];\n} elseif (is_object($data)) {\n    echo $data-&gt;name;\n} else {\n    echo \"\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u578b\u3067\u3059\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-280\">\u914d\u5217\u30a8\u30e9\u30fc\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-281\">1. print_r()\u3068var_dump()\u306e\u6d3b\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = ['name' =&gt; 'John', 'age' =&gt; 30, 'children' =&gt; ['Alice', 'Bob']];\n\n\/\/ \u57fa\u672c\u7684\u306a\u69cb\u9020\u8868\u793a\nprint_r($array);\n\n\/\/ \u578b\u60c5\u5831\u3082\u542b\u3081\u305f\u8a73\u7d30\u8868\u793a\nvar_dump($array);\n\n\/\/ HTML\u51fa\u529b\u6642\u306e\u6574\u5f62\necho \"&lt;pre&gt;\";\nprint_r($array);\necho \"&lt;\/pre&gt;\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-282\">2. \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u78ba\u8a8d<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\nini_set('log_errors', 1);\nini_set('error_log', '\/path\/to\/error.log');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-283\">3. var_export()\u306b\u3088\u308b\u518d\u5229\u7528\u53ef\u80fd\u306a\u51fa\u529b<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [1, 2, 3];\n$code = var_export($array, true);\necho $code; \/\/ array (0 =&gt; 1, 1 =&gt; 2, 2 =&gt; 3)\n\n\/\/ \u3053\u308c\u3092\u30b3\u30d4\u30fc\u3057\u3066\u518d\u5229\u7528\u3067\u304d\u308b\n$newArray = array (0 =&gt; 1, 1 =&gt; 2, 2 =&gt; 3);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-284\">4. Xdebug\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>PHP\u30c7\u30d0\u30c3\u30b0\u62e1\u5f35\u6a5f\u80fdXdebug\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3088\u308a\u8a73\u7d30\u306a\u60c5\u5831\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Xdebug\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u5834\u5408\nvar_dump($complexArray); \/\/ Xdebug\u306b\u3088\u308b\u6574\u5f62\u3055\u308c\u305f\u51fa\u529b\u304c\u5f97\u3089\u308c\u308b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-285\">\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u3092\u4f7f\u7528\u3059\u308b<\/strong>\uff1a\u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc\u306f\u4f8b\u5916\u3092\u6295\u3052\u308b\u3053\u3068\u3067\u660e\u793a\u7684\u306b\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getRequiredData(string $key): array {\n    $data = fetchData($key);\n    \n    if (!is_array($data)) {\n        throw new InvalidArgumentException(\"\u30c7\u30fc\u30bf\u300c{$key}\u300d\u306f\u914d\u5217\u3067\u306f\u3042\u308a\u307e\u305b\u3093\");\n    }\n    \n    if (empty($data)) {\n        throw new RuntimeException(\"\u30c7\u30fc\u30bf\u300c{$key}\u300d\u306f\u7a7a\u3067\u3059\");\n    }\n    \n    return $data;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    $userData = getRequiredData('users');\n    foreach ($userData as $user) {\n        \/\/ \u51e6\u7406\n    }\n} catch (InvalidArgumentException $e) {\n    \/\/ \u7121\u52b9\u306a\u5f15\u6570\u306b\u5bfe\u3059\u308b\u51e6\u7406\n    logError($e-&gt;getMessage());\n    displayError(\"\u30c7\u30fc\u30bf\u5f62\u5f0f\u304c\u7121\u52b9\u3067\u3059\");\n} catch (RuntimeException $e) {\n    \/\/ \u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u306b\u5bfe\u3059\u308b\u51e6\u7406\n    logError($e-&gt;getMessage());\n    displayError(\"\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\");\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5165\u529b\u306e\u691c\u8a3c<\/strong>\uff1a\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u5148\u982d\u3067\u5165\u529b\u3092\u691c\u8a3c<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function processUserData(array $userData): array {\n    \/\/ \u5148\u982d\u3067\u5165\u529b\u3092\u691c\u8a3c\n    $requiredFields = ['name', 'email', 'age'];\n    foreach ($requiredFields as $field) {\n        if (!array_key_exists($field, $userData)) {\n            throw new InvalidArgumentException(\"\u5fc5\u9808\u30d5\u30a3\u30fc\u30eb\u30c9\u300c{$field}\u300d\u304c\u3042\u308a\u307e\u305b\u3093\");\n        }\n    }\n    \n    \/\/ \u578b\u306e\u691c\u8a3c\n    if (!is_string($userData['name']) || !is_string($userData['email']) || !is_numeric($userData['age'])) {\n        throw new InvalidArgumentException(\"\u30c7\u30fc\u30bf\u578b\u304c\u7121\u52b9\u3067\u3059\");\n    }\n    \n    \/\/ \u691c\u8a3c\u304c\u901a\u904e\u3057\u305f\u3089\u51e6\u7406\u3092\u7d9a\u884c\n    \/\/ ...\n    \n    return $processedData;\n}\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\uff1a\u5e38\u306b\u6700\u60aa\u306e\u30b1\u30fc\u30b9\u3092\u60f3\u5b9a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u9632\u5fa1\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\nfunction safelyProcessData($data) {\n    \/\/ \u30c7\u30fc\u30bf\u304c\u914d\u5217\u3067\u306a\u3051\u308c\u3070\u7a7a\u914d\u5217\u3092\u4f7f\u7528\n    $data = is_array($data) ? $data : [];\n    \n    \/\/ \u5fc5\u9808\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\n    $name = $data['name'] ?? 'Guest';\n    $age = $data['age'] ?? 0;\n    \n    \/\/ \u578b\u306e\u5b89\u5168\u6027\u3092\u78ba\u4fdd\n    $age = is_numeric($age) ? (int)$age : 0;\n    \n    \/\/ \u5024\u306e\u7bc4\u56f2\u3092\u4fdd\u8a3c\n    $age = max(0, min($age, 120));\n    \n    return \"Name: $name, Age: $age\";\n}\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u54c1\u8cea\u30c4\u30fc\u30eb\u306e\u6d3b\u7528<\/strong>\uff1a\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u3067\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u691c\u51fa<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># PHPStan\uff08\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\uff09\u306e\u5b9f\u884c\nphpstan analyse src\/\n\n# PHP_CodeSniffer\uff08\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb\uff09\u306e\u5b9f\u884c\nphpcs --standard=PSR12 src\/\n<\/pre>\n\n\n\n<p>\u914d\u5217\u306b\u95a2\u9023\u3059\u308b\u30a8\u30e9\u30fc\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\u3001\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306aPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\u3084\u4f8b\u5916\u51e6\u7406\u306a\u3069PHP 7\u4ee5\u964d\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u591a\u304f\u306e\u30a8\u30e9\u30fc\u3092\u65e9\u671f\u306b\u691c\u51fa\u3057\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002## \u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/p>\n\n\n\n<p>\u914d\u5217\u3092\u6271\u3046\u969b\u306b\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30a8\u30e9\u30fc\u3084\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u306e\u914d\u5217\u64cd\u4f5c\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-286\">\u201cUndefined index\u201d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u56de\u907f\u65b9\u6cd5<\/h3>\n\n\n\n<p><code>Undefined index<\/code>\u30a8\u30e9\u30fc\u306f\u3001\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u767a\u751f\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u914d\u5217\u95a2\u9023\u30a8\u30e9\u30fc\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Notice: Undefined index: name in \/path\/to\/file.php on line 10\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-287\">\u30a8\u30e9\u30fc\u306e\u767a\u751f\u30e1\u30ab\u30cb\u30ba\u30e0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\"id\" =&gt; 1, \"email\" =&gt; \"user@example.com\"];\necho $user[\"name\"]; \/\/ Undefined index: name\n<\/pre>\n\n\n\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001PHP\u304c\u30a8\u30e9\u30fc\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u304c\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u5b9f\u884c\u306f\u505c\u6b62\u3057\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u306b\u3088\u308a\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3084\u3001\u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-288\">\u5bfe\u51e6\u6cd51: isset()\u306b\u3088\u308b\u5b58\u5728\u78ba\u8a8d<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\"id\" =&gt; 1, \"email\" =&gt; \"user@example.com\"];\n\n\/\/ \u65b9\u6cd51: \u6761\u4ef6\u5206\u5c90\u3067\u78ba\u8a8d\nif (isset($user[\"name\"])) {\n    echo $user[\"name\"];\n<\/pre>\n\n\n\n<p>\/**<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3080<\/li>\n\n\n\n<li>@param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9<\/li>\n\n\n\n<li>@param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b<\/li>\n\n\n\n<li>@return Generator \u9023\u60f3\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf *\/ function readCsvLazy($filename, $hasHeader = true) { \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f $handle = fopen($filename, \u2018r\u2019); if ($handle === false) { throw new Exception(\u201c\u30d5\u30a1\u30a4\u30eb \u2018$filename\u2019 \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\u201d); } try { \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080 $headers = $hasHeader ? fgetcsv($handle) : null; <code>\/\/ \u5404\u884c\u3092\u751f\u6210 while (($row = fgetcsv($handle)) !== false) { if ($headers) { \/\/ \u884c\u306e\u5217\u6570\u304c\u30d8\u30c3\u30c0\u30fc\u3068\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u5bfe\u5fdc if (count($row) &lt; count($headers)) { $row = array_pad($row, count($headers), null); } elseif (count($row) &gt; count($headers)) { $row = array_slice($row, 0, count($headers)); } yield array_combine($headers, $row); } else { yield $row; } }<\/code> } finally { fclose($handle); } }<\/li>\n<\/ul>\n\n\n\n<p>\/\/ \u4f7f\u7528\u4f8b\uff1a100\u4e07\u884c\u306eCSV\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406 try { $totalAge = 0; $count = 0;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">foreach (readCsvLazy('large_users.csv') as $index =&gt; $user) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\u3092\u52a0\u7b97\n    $totalAge += (int)$user['age'];\n    $count++;\n    \n    \/\/ \u9032\u6357\u8868\u793a\uff0810,000\u884c\u3054\u3068\uff09\n    if ($index % 10000 === 0) {\n        echo \"\u51e6\u7406\u4e2d: \" . number_format($index) . \" \u884c...\\n\";\n    }\n}\n\n\/\/ \u5e73\u5747\u5e74\u9f62\u3092\u8a08\u7b97\n$averageAge = $count &gt; 0 ? $totalAge \/ $count : 0;\necho \"\u51e6\u7406\u5b8c\u4e86: \" . number_format($count) . \" \u884c\\n\";\necho \"\u5e73\u5747\u5e74\u9f62: \" . number_format($averageAge, 1) . \" \u6b73\\n\";\n<\/pre>\n\n\n\n<p>} catch (Exception $e) { echo \u201c\u30a8\u30e9\u30fc: \u201d . $e-&gt;getMessage(); }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n#### CSV\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u3068\u6b63\u898f\u5316\n\n\u5b9f\u969b\u306eCSV\u30c7\u30fc\u30bf\u306f\u3001\u3057\u3070\u3057\u3070\u4e0d\u5b8c\u5168\u3067\u3042\u3063\u305f\u308a\u5f62\u5f0f\u304c\u4e00\u8cab\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u3001\u6b63\u898f\u5316\u3059\u308b\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n```php\n\/**\n * CSV\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u6b63\u898f\u5316\u3059\u308b\n * \n * @param array $data CSV\u304b\u3089\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u914d\u5217\n * @param array $schema \u691c\u8a3c\u30fb\u5909\u63db\u30eb\u30fc\u30eb\u306e\u30b9\u30ad\u30fc\u30de\n * @return array \u691c\u8a3c\u7d50\u679c\u3068\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\n *\/\nfunction validateAndNormalizeCsvData(array $data, array $schema) {\n    $result = [\n        'valid' =&gt; [], \/\/ \u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\n        'invalid' =&gt; [], \/\/ \u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\n        'errors' =&gt; [] \/\/ \u30a8\u30e9\u30fc\u60c5\u5831\n    ];\n    \n    foreach ($data as $index =&gt; $row) {\n        $isValid = true;\n        $normalizedRow = [];\n        $rowErrors = [];\n        \n        \/\/ \u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u691c\u8a3c\u30fb\u6b63\u898f\u5316\n        foreach ($schema as $field =&gt; $rules) {\n            $value = $row[$field] ?? null;\n            \n            \/\/ \u5fc5\u9808\u30c1\u30a7\u30c3\u30af\n            if (isset($rules['required']) &amp;&amp; $rules['required'] &amp;&amp; ($value === null || $value === '')) {\n                $isValid = false;\n                $rowErrors[] = \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306f\u5fc5\u9808\u3067\u3059\";\n                continue;\n            }\n            \n            \/\/ \u5024\u304c\u306a\u3044\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\n            if (($value === null || $value === '') &amp;&amp; isset($rules['default'])) {\n                $value = $rules['default'];\n            }\n            \n            \/\/ \u578b\u5909\u63db\n            if (isset($rules['type'])) {\n                switch ($rules['type']) {\n                    case 'int':\n                        $value = filter_var($value, FILTER_VALIDATE_INT) !== false ? (int)$value : null;\n                        break;\n                    case 'float':\n                        $value = filter_var($value, FILTER_VALIDATE_FLOAT) !== false ? (float)$value : null;\n                        break;\n                    case 'bool':\n                        $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);\n                        break;\n                    case 'email':\n                        $value = filter_var($value, FILTER_VALIDATE_EMAIL) !== false ? $value : null;\n                        break;\n                }\n                \n                \/\/ \u578b\u5909\u63db\u306b\u5931\u6557\u3057\u305f\u5834\u5408\n                if ($value === null &amp;&amp; isset($rules['required']) &amp;&amp; $rules['required']) {\n                    $isValid = false;\n                    $rowErrors[] = \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306f\u6709\u52b9\u306a {$rules['type']} \u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n                }\n            }\n            \n            \/\/ \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n            if (isset($rules['validate']) &amp;&amp; is_callable($rules['validate'])) {\n                $validateResult = $rules['validate']($value);\n                if ($validateResult !== true) {\n                    $isValid = false;\n                    $rowErrors[] = is_string($validateResult) ? $validateResult : \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\";\n                }\n            }\n            \n            \/\/ \u5909\u63db\u95a2\u6570\n            if (isset($rules['transform']) &amp;&amp; is_callable($rules['transform'])) {\n                $value = $rules['transform']($value);\n            }\n            \n            $normalizedRow[$field] = $value;\n        }\n        \n        \/\/ \u691c\u8a3c\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u5206\u985e\n        if ($isValid) {\n            $result['valid'][] = $normalizedRow;\n        } else {\n            $normalizedRow['_original'] = $row; \/\/ \u5143\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n            $normalizedRow['_errors'] = $rowErrors;\n            $result['invalid'][] = $normalizedRow;\n            $result['errors'][$index] = $rowErrors;\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u3068\u6b63\u898f\u5316\n$userData = readCsv('users.csv');\n\n$schema = [\n    'name' =&gt; [\n        'required' =&gt; true,\n        'transform' =&gt; function($value) {\n            return trim(ucwords(strtolower($value)));\n        }\n    ],\n    'email' =&gt; [\n        'required' =&gt; true,\n        'type' =&gt; 'email',\n        'transform' =&gt; 'strtolower'\n    ],\n    'age' =&gt; [\n        'type' =&gt; 'int',\n        'validate' =&gt; function($value) {\n            if ($value &lt; 18 || $value &gt; 120) {\n                return \"\u5e74\u9f62\u306f18\u301c120\u306e\u9593\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n            }\n            return true;\n        }\n    ],\n    'active' =&gt; [\n        'type' =&gt; 'bool',\n        'default' =&gt; false\n    ],\n    'registration_date' =&gt; [\n        'transform' =&gt; function($value) {\n            return $value ? date('Y-m-d', strtotime($value)) : null;\n        }\n    ]\n];\n\n$result = validateAndNormalizeCsvData($userData, $schema);\n\necho \"\u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9: \" . count($result['valid']) . \"\\n\";\necho \"\u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9: \" . count($result['invalid']) . \"\\n\";\n\n\/\/ \u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\u3092\u51e6\u7406\nforeach ($result['valid'] as $user) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u4fdd\u5b58\u3059\u308b\u306a\u3069\u306e\u51e6\u7406\n}\n\n\/\/ \u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\u3092\u30a8\u30e9\u30fc\u30ed\u30b0\u306b\u8a18\u9332\nforeach ($result['invalid'] as $user) {\n    $errorMessages = implode(', ', $user['_errors']);\n    error_log(\"\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u30a8\u30e9\u30fc: {$errorMessages}\");\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-289\">CSV\u30a8\u30af\u30b9\u30dd\u30fc\u30c8<\/h4>\n\n\n\n<p>\u914d\u5217\u30c7\u30fc\u30bf\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u4f8b\u3082\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u30c7\u30fc\u30bf\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\n * \n * @param array $data \u66f8\u304d\u51fa\u3059\u30c7\u30fc\u30bf\u914d\u5217\n * @param string $filename \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d\n * @param array $headers \u51fa\u529b\u3059\u308b\u30d8\u30c3\u30c0\u30fc\uff08\u7701\u7565\u6642\u306f\u6700\u521d\u306e\u884c\u306e\u30ad\u30fc\u3092\u4f7f\u7528\uff09\n * @return int \u66f8\u304d\u51fa\u3057\u305f\u884c\u6570\n *\/\nfunction writeCsv(array $data, string $filename, array $headers = null) {\n    if (empty($data)) {\n        return 0;\n    }\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u6700\u521d\u306e\u884c\u306e\u30ad\u30fc\u3092\u4f7f\u7528\n    if ($headers === null) {\n        $headers = array_keys(reset($data));\n    }\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'w');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u66f8\u304d\u8fbc\u307f\u7528\u306b\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    try {\n        \/\/ BOM\u306a\u3057UTF-8\u3092\u660e\u793a\n        fprintf($handle, chr(0xEF).chr(0xBB).chr(0xBF));\n        \n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u66f8\u304d\u8fbc\u3080\n        fputcsv($handle, $headers);\n        \n        \/\/ \u30c7\u30fc\u30bf\u884c\u3092\u66f8\u304d\u8fbc\u3080\n        $count = 0;\n        foreach ($data as $row) {\n            \/\/ \u6307\u5b9a\u3055\u308c\u305f\u30d8\u30c3\u30c0\u30fc\u306b\u5bfe\u5fdc\u3059\u308b\u5024\u3092\u62bd\u51fa\n            $values = [];\n            foreach ($headers as $header) {\n                $values[] = $row[$header] ?? '';\n            }\n            \n            fputcsv($handle, $values);\n            $count++;\n        }\n        \n        return $count;\n    } finally {\n        fclose($handle);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092CSV\u306b\u66f8\u304d\u51fa\u3059\n$users = [\n    [\n        'id' =&gt; 1,\n        'name' =&gt; '\u7530\u4e2d \u592a\u90ce',\n        'email' =&gt; 'tanaka@example.com',\n        'age' =&gt; 35,\n        'active' =&gt; true,\n        'last_login' =&gt; '2023-06-15'\n    ],\n    [\n        'id' =&gt; 2,\n        'name' =&gt; '\u4f50\u85e4 \u82b1\u5b50',\n        'email' =&gt; 'sato@example.com',\n        'age' =&gt; 28,\n        'active' =&gt; true,\n        'last_login' =&gt; '2023-06-10'\n    ]\n];\n\n\/\/ \u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3060\u3051\u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\n$exportHeaders = ['id', 'name', 'email', 'age'];\n$count = writeCsv($users, 'exported_users.csv', $exportHeaders);\necho \"{$count} \u4ef6\u306e\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3057\u307e\u3057\u305f\u3002\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-290\">JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>JSON\u306f\u3001API\u3084\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u305f\u3081\u306e\u6a19\u6e96\u7684\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3068JSON\u30c7\u30fc\u30bf\u306e\u9593\u3067\u5909\u63db\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-291\">\u57fa\u672c\u7684\u306aJSON\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP\u914d\u5217\u304b\u3089JSON\u3078\u306e\u5909\u63db\n$user = [\n    'id' =&gt; 1,\n    'name' =&gt; '\u7530\u4e2d \u592a\u90ce',\n    'email' =&gt; 'tanaka@example.com',\n    'skills' =&gt; ['PHP', 'JavaScript', 'MySQL'],\n    'active' =&gt; true\n];\n\n\/\/ \u914d\u5217\u304b\u3089JSON\u306b\u5909\u63db\n$json = json_encode($user);\necho $json . \"\\n\";\n\/\/ {\"id\":1,\"name\":\"\u7530\u4e2d \u592a\u90ce\",\"email\":\"tanaka@example.com\",\"skills\":[\"PHP\",\"JavaScript\",\"MySQL\"],\"active\":true}\n\n\/\/ JSON\u304b\u3089\u914d\u5217\u306b\u5909\u63db\n$decoded = json_decode($json, true); \/\/ \u7b2c2\u5f15\u6570\u3092true\u306b\u3059\u308b\u3068\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\nvar_dump($decoded);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-292\">\u30a8\u30f3\u30b3\u30fc\u30c9\u30fb\u30c7\u30b3\u30fc\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u6d3b\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u9ad8\u5ea6\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u305fJSON\u30a8\u30f3\u30b3\u30fc\u30c9\n * \n * @param mixed $data JSON\u306b\u5909\u63db\u3059\u308b\u30c7\u30fc\u30bf\n * @param bool $prettyPrint \u6574\u5f62\u51fa\u529b\u3059\u308b\u304b\u3069\u3046\u304b\n * @param bool $escapeUnicode Unicode\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u304b\u3069\u3046\u304b\n * @return string JSON\u6587\u5b57\u5217\n *\/\nfunction advancedJsonEncode($data, $prettyPrint = false, $escapeUnicode = false) {\n    $options = JSON_UNESCAPED_SLASHES;\n    \n    if ($prettyPrint) {\n        $options |= JSON_PRETTY_PRINT;\n    }\n    \n    if (!$escapeUnicode) {\n        $options |= JSON_UNESCAPED_UNICODE;\n    }\n    \n    $json = json_encode($data, $options);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception('JSON\u30a8\u30f3\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: ' . json_last_error_msg());\n    }\n    \n    return $json;\n}\n\n\/**\n * \u9ad8\u5ea6\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u305fJSON\u30c7\u30b3\u30fc\u30c9\n * \n * @param string $json \u30c7\u30b3\u30fc\u30c9\u3059\u308bJSON\u6587\u5b57\u5217\n * @param bool $assoc \u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\u304b\u3069\u3046\u304b\n * @param int $depth \u518d\u5e30\u306e\u6df1\u3055\n * @return mixed \u30c7\u30b3\u30fc\u30c9\u7d50\u679c\n *\/\nfunction advancedJsonDecode($json, $assoc = true, $depth = 512) {\n    $data = json_decode($json, $assoc, $depth, JSON_BIGINT_AS_STRING);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception('JSON\u30c7\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: ' . json_last_error_msg());\n    }\n    \n    return $data;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$complexData = [\n    'name' =&gt; '\u65e5\u672c\u8a9e\u306e\u540d\u524d',\n    'path' =&gt; 'C:\\\\path\\\\to\\\\file.txt',\n    'large_number' =&gt; 9223372036854775807,\n    'nested' =&gt; ['level1' =&gt; ['level2' =&gt; ['level3' =&gt; 'deep']]]\n];\n\n\/\/ \u6574\u5f62\u3055\u308c\u305fJSON\u51fa\u529b\uff08\u65e5\u672c\u8a9e\u306f\u305d\u306e\u307e\u307e\u3001\u30b9\u30e9\u30c3\u30b7\u30e5\u3082\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u306a\u3044\uff09\n$prettyJson = advancedJsonEncode($complexData, true, false);\necho $prettyJson . \"\\n\";\n\n\/\/ \u30c7\u30b3\u30fc\u30c9\uff08\u5927\u304d\u306a\u6574\u6570\u3082\u6587\u5b57\u5217\u3068\u3057\u3066\u4fdd\u6301\uff09\ntry {\n    $decoded = advancedJsonDecode($prettyJson);\n    var_dump($decoded['large_number']); \/\/ \u5927\u304d\u306a\u6574\u6570\u3082\u5b89\u5168\u306b\u51e6\u7406\n} catch (Exception $e) {\n    echo $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-293\">\u6df1\u3044\u30cd\u30b9\u30c8\u306e\u914d\u5217\u5909\u63db\u3068\u30d1\u30b9\u62bd\u51fa<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u30cd\u30b9\u30c8\u3055\u308c\u305fJSON\u30c7\u30fc\u30bf\u3092\u6271\u3046\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u304b\u3089\u6307\u5b9a\u30d1\u30b9\u306e\u5024\u3092\u53d6\u5f97\n * \n * @param array $array \u5bfe\u8c61\u306e\u914d\u5217\n * @param string|array $path \u30c9\u30c3\u30c8\u533a\u5207\u308a\u307e\u305f\u306f\u914d\u5217\u306e\u30d1\u30b9\n * @param mixed $default \u5024\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n * @return mixed \u898b\u3064\u304b\u3063\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n *\/\nfunction arrayGet($array, $path, $default = null) {\n    \/\/ \u30d1\u30b9\u304c\u6587\u5b57\u5217\u306e\u5834\u5408\u3001\u914d\u5217\u306b\u5909\u63db\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    \/\/ \u914d\u5217\u3067\u306a\u3051\u308c\u3070\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\n    if (!is_array($array)) {\n        return $default;\n    }\n    \n    \/\/ \u7a7a\u306e\u30d1\u30b9\u306a\u3089\u914d\u5217\u81ea\u4f53\u3092\u8fd4\u3059\n    if (empty($path)) {\n        return $array;\n    }\n    \n    \/\/ \u6700\u521d\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u53d6\u5f97\u3057\u3001\u30d1\u30b9\u304b\u3089\u524a\u9664\n    $segment = array_shift($path);\n    \n    \/\/ \u73fe\u5728\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u914d\u5217\u306b\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    if (!isset($array[$segment])) {\n        return $default;\n    }\n    \n    \/\/ \u30d1\u30b9\u306e\u6b8b\u308a\u304c\u3042\u308c\u3070\u518d\u5e30\u7684\u306b\u51e6\u7406\u3001\u306a\u3051\u308c\u3070\u5024\u3092\u8fd4\u3059\n    return empty($path) ? $array[$segment] : arrayGet($array[$segment], $path, $default);\n}\n\n\/**\n * \u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306b\u6307\u5b9a\u30d1\u30b9\u3067\u5024\u3092\u8a2d\u5b9a\n * \n * @param array &amp;$array \u5bfe\u8c61\u306e\u914d\u5217\uff08\u53c2\u7167\u6e21\u3057\uff09\n * @param string|array $path \u30c9\u30c3\u30c8\u533a\u5207\u308a\u307e\u305f\u306f\u914d\u5217\u306e\u30d1\u30b9\n * @param mixed $value \u8a2d\u5b9a\u3059\u308b\u5024\n * @return void\n *\/\nfunction arraySet(&amp;$array, $path, $value) {\n    \/\/ \u30d1\u30b9\u304c\u6587\u5b57\u5217\u306e\u5834\u5408\u3001\u914d\u5217\u306b\u5909\u63db\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    \/\/ \u53c2\u7167\u3092\u30b3\u30d4\u30fc\n    $current = &amp;$array;\n    \n    \/\/ \u30d1\u30b9\u306e\u6700\u5f8c\u306e\u8981\u7d20\u4ee5\u5916\u3092\u51e6\u7406\n    foreach ($path as $key) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u4f5c\u6210\n        if (!isset($current[$key]) || !is_array($current[$key])) {\n            $current[$key] = [];\n        }\n        \n        \/\/ \u53c2\u7167\u3092\u66f4\u65b0\n        $current = &amp;$current[$key];\n    }\n    \n    \/\/ \u5024\u3092\u8a2d\u5b9a\n    $current = $value;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u6df1\u3044\u30cd\u30b9\u30c8\u306eJSON\u30c7\u30fc\u30bf\u51e6\u7406\n$jsonString = '{\n    \"user\": {\n        \"profile\": {\n            \"name\": \"John Doe\",\n            \"contact\": {\n                \"email\": \"john@example.com\",\n                \"phone\": \"123-456-7890\"\n            }\n        },\n        \"settings\": {\n            \"theme\": \"dark\",\n            \"notifications\": {\n                \"email\": true,\n                \"push\": false\n            }\n        }\n    },\n    \"app\": {\n        \"version\": \"1.0.0\",\n        \"features\": [\"search\", \"export\", \"share\"]\n    }\n}';\n\n\/\/ JSON\u3092\u30c7\u30b3\u30fc\u30c9\n$data = json_decode($jsonString, true);\n\n\/\/ \u6df1\u304f\u30cd\u30b9\u30c8\u3055\u308c\u305f\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\n$email = arrayGet($data, 'user.profile.contact.email');\necho \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9: $email\\n\"; \/\/ john@example.com\n\n\/\/ \u5b58\u5728\u3057\u306a\u3044\u30d1\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\uff09\n$address = arrayGet($data, 'user.profile.address', '\u4f4f\u6240\u672a\u8a2d\u5b9a');\necho \"\u4f4f\u6240: $address\\n\"; \/\/ \u4f4f\u6240\u672a\u8a2d\u5b9a\n\n\/\/ \u5024\u306e\u8a2d\u5b9a\narraySet($data, 'user.settings.notifications.push', true);\n$pushEnabled = arrayGet($data, 'user.settings.notifications.push');\necho \"\u30d7\u30c3\u30b7\u30e5\u901a\u77e5: \" . ($pushEnabled ? '\u6709\u52b9' : '\u7121\u52b9') . \"\\n\"; \/\/ \u6709\u52b9\n\n\/\/ \u65b0\u3057\u3044\u30d1\u30b9\u306b\u5024\u3092\u8a2d\u5b9a\narraySet($data, 'user.profile.address', '\u6771\u4eac\u90fd\u6e0b\u8c37\u533a');\necho \"\u65b0\u3057\u3044\u4f4f\u6240: \" . arrayGet($data, 'user.profile.address') . \"\\n\"; \/\/ \u6771\u4eac\u90fd\u6e0b\u8c37\u533a\n\n\/\/ \u5909\u66f4\u3092\u53cd\u6620\u3057\u305fJSON\u306b\u5909\u63db\n$updatedJson = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);\necho \"\u66f4\u65b0\u3055\u308c\u305fJSON:\\n$updatedJson\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-294\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u51e6\u7406<\/h4>\n\n\n\n<p>JSON\u30d9\u30fc\u30b9\u306eAPI\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u51e6\u7406\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * JSON\u30d9\u30fc\u30b9\u306eAPI\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\n * \n * @param string $url API\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\n * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n * @param array $data \u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\n * @param array $headers \u8ffd\u52a0\u306eHTTP\u30d8\u30c3\u30c0\u30fc\n * @return array \u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\n *\/\nfunction apiRequest($url, $method = 'GET', $data = null, $headers = []) {\n    $ch = curl_init();\n    \n    \/\/ cURL\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\n    curl_setopt($ch, CURLOPT_URL, $url);\n    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);\n    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);\n    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);\n    \n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30d8\u30c3\u30c0\u30fc\u306e\u8a2d\u5b9a\n    $defaultHeaders = [\n        'Accept' =&gt; 'application\/json',\n        'Content-Type' =&gt; 'application\/json'\n    ];\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u306e\u7d50\u5408\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    $formattedHeaders = [];\n    foreach (array_merge($defaultHeaders, $headers) as $name =&gt; $value) {\n        $formattedHeaders[] = \"$name: $value\";\n    }\n    curl_setopt($ch, CURLOPT_HTTPHEADER, $formattedHeaders);\n    \n    \/\/ \u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u306fJSON\u3068\u3057\u3066\u9001\u4fe1\n    if ($data !== null &amp;&amp; ($method === 'POST' || $method === 'PUT' || $method === 'PATCH')) {\n        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));\n    }\n    \n    \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u5b9f\u884c\n    $response = curl_exec($ch);\n    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);\n    $error = curl_error($ch);\n    \n    curl_close($ch);\n    \n    \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n    if ($error) {\n        throw new Exception(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u30a8\u30e9\u30fc: $error\");\n    }\n    \n    \/\/ JSON\u30c7\u30b3\u30fc\u30c9\n    $decodedResponse = json_decode($response, true);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception(\"JSON\u30c7\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: \" . json_last_error_msg());\n    }\n    \n    \/\/ HTTP\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\n    if ($httpCode &gt;= 400) {\n        $errorMessage = isset($decodedResponse['message']) \n            ? $decodedResponse['message'] \n            : \"HTTP\u30a8\u30e9\u30fc: $httpCode\";\n        throw new Exception($errorMessage, $httpCode);\n    }\n    \n    return $decodedResponse;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u5916\u90e8API\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u51e6\u7406\ntry {\n    \/\/ API\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\n    $users = apiRequest('https:\/\/api.example.com\/users');\n    \n    \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4f8b\n    $activeUsers = array_filter($users, function($user) {\n        return isset($user['active']) &amp;&amp; $user['active'] === true;\n    });\n    \n    \/\/ \u5e74\u9f62\u3067\u30bd\u30fc\u30c8\n    usort($activeUsers, function($a, $b) {\n        return $a['age'] &lt;=&gt; $b['age'];\n    });\n    \n    \/\/ \u51e6\u7406\u7d50\u679c\u3092\u8868\u793a\n    echo \"\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc: \" . count($activeUsers) . \"\u4eba\\n\";\n    \n    foreach ($activeUsers as $user) {\n        echo \"{$user['name']} ({$user['age']}\u6b73) - {$user['email']}\\n\";\n    }\n    \n    \/\/ \u65b0\u3057\u3044\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\uff08POST\u30ea\u30af\u30a8\u30b9\u30c8\uff09\n    $newUser = [\n        'name' =&gt; '\u5c71\u7530 \u6b21\u90ce',\n        'email' =&gt; 'yamada@example.com',\n        'age' =&gt; 42\n    ];\n    \n    $createdUser = apiRequest('https:\/\/api.example.com\/users', 'POST', $newUser);\n    echo \"\u4f5c\u6210\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc: ID {$createdUser['id']}\\n\";\n    \n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-295\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3057\u3001\u6709\u7528\u306a\u914d\u5217\u69cb\u9020\u306b\u5909\u63db\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-296\">\u57fa\u672c\u7684\u306a\u7d50\u679c\u30bb\u30c3\u30c8\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u53d6\u5f97\n * \n * @return PDO\n *\/\nfunction getDbConnection() {\n    $dsn = 'mysql:host=localhost;dbname=myapp;charset=utf8mb4';\n    $username = 'dbuser';\n    $password = 'dbpass';\n    $options = [\n        PDO::ATTR_ERRMODE =&gt; PDO::ERRMODE_EXCEPTION,\n        PDO::ATTR_DEFAULT_FETCH_MODE =&gt; PDO::FETCH_ASSOC,\n        PDO::ATTR_EMULATE_PREPARES =&gt; false\n    ];\n    \n    return new PDO($dsn, $username, $password, $options);\n}\n\n\/**\n * \u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u7d50\u679c\u3092\u53d6\u5f97\n * \n * @param string $sql SQL\u30af\u30a8\u30ea\n * @param array $params \u30d0\u30a4\u30f3\u30c9\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\n * @return array \u7d50\u679c\u30bb\u30c3\u30c8\n *\/\nfunction fetchAll($sql, $params = []) {\n    $pdo = getDbConnection();\n    $stmt = $pdo-&gt;prepare($sql);\n    $stmt-&gt;execute($params);\n    \n    return $stmt-&gt;fetchAll();\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u3068\u305d\u306e\u6ce8\u6587\u3092\u53d6\u5f97\n$sql = \"SELECT users.id, users.name, users.email, orders.id as order_id, \n               orders.product, orders.amount\n        FROM users\n        LEFT JOIN orders ON users.id = orders.user_id\n        WHERE users.active = 1\n        ORDER BY users.id, orders.id\";\n\n$results = fetchAll($sql);\n\n\/\/ \u7d50\u679c\u3092\u30e6\u30fc\u30b6\u30fc\u3054\u3068\u306b\u30b0\u30eb\u30fc\u30d7\u5316\n$users = [];\n\nforeach ($results as $row) {\n    $userId = $row['id'];\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u307e\u3060\u914d\u5217\u306b\u306a\u3044\u5834\u5408\u306f\u8ffd\u52a0\n    if (!isset($users[$userId])) {\n        $users[$userId] = [\n            'id' =&gt; $userId,\n            'name' =&gt; $row['name'],\n            'email' =&gt; $row['email'],\n            'orders' =&gt; []\n        ];\n    }\n    \n    \/\/ \u6ce8\u6587\u60c5\u5831\u304c\u3042\u308c\u3070\u8ffd\u52a0\n    if (!empty($row['order_id'])) {\n        $users[$userId]['orders'][] = [\n            'id' =&gt; $row['order_id'],\n            'product' =&gt; $row['product'],\n            'amount' =&gt; $row['amount']\n        ];\n    }\n}\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306b\u5909\u63db\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\uff09\n$users = array_values($users);\n\n\/\/ \u7d50\u679c\u3092\u8868\u793a\nforeach ($users as $user) {\n    echo \"{$user['name']} ({$user['email']}):\\n\";\n    \n    if (empty($user['orders'])) {\n        echo \"  \u6ce8\u6587\u306a\u3057\\n\";\n    } else {\n        foreach ($user['orders'] as $order) {\n            echo \"  - {$order['product']}: \u00a5{$order['amount']}\\n\";\n        }\n    }\n    echo \"\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-297\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u96c6\u7d04\u3068\u5909\u63db<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u3092\u30ad\u30fc\u306b\u57fa\u3065\u3044\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\n * \n * @param array $results \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\n * @param string $key \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u5217\u540d\n * @param bool $multipleValues \u540c\u3058\u30ad\u30fc\u306b\u8907\u6570\u306e\u884c\u3092\u8a31\u53ef\u3059\u308b\u304b\n * @return array \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction indexResultsByKey($results, $key, $multipleValues = false) {\n    $indexed = [];\n    \n    foreach ($results as $row) {\n        if (!isset($row[$key])) {\n            continue; \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u884c\u306f\u30b9\u30ad\u30c3\u30d7\n        }\n        \n        $keyValue = $row[$key];\n        \n        if ($multipleValues) {\n            \/\/ \u540c\u3058\u30ad\u30fc\u306b\u8907\u6570\u306e\u884c\u3092\u8a31\u53ef\n            if (!isset($indexed[$keyValue])) {\n                $indexed[$keyValue] = [];\n            }\n            $indexed[$keyValue][] = $row;\n        } else {\n            \/\/ \u540c\u3058\u30ad\u30fc\u306e\u884c\u306f\u4e0a\u66f8\u304d\n            $indexed[$keyValue] = $row;\n        }\n    }\n    \n    return $indexed;\n}\n\n\/**\n * \u4e8c\u6b21\u5143\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u968e\u5c64\u5316\u3055\u308c\u305f\u914d\u5217\u306b\u5909\u63db\n * \n * @param array $rows \u7d50\u679c\u30bb\u30c3\u30c8\n * @param array $config \u968e\u5c64\u5316\u8a2d\u5b9a\n * @return array \u968e\u5c64\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction nestResults($rows, $config) {\n    $nested = [];\n    $parentKey = $config['parentKey'];\n    $childKey = $config['childKey'];\n    $childrenKey = $config['childrenKey'];\n    \n    \/\/ \u7d50\u679c\u3092\u89aa\u30ad\u30fc\u3067\u30b0\u30eb\u30fc\u30d7\u5316\n    $groupedByParent = [];\n    foreach ($rows as $row) {\n        $parentValue = $row[$parentKey];\n        \n        if (!isset($groupedByParent[$parentValue])) {\n            \/\/ \u89aa\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u521d\u671f\u5316\n            $parent = [];\n            foreach ($row as $k =&gt; $v) {\n                \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u9664\u5916\n                if (!isset($config['childFields']) || !in_array($k, $config['childFields'])) {\n                    $parent[$k] = $v;\n                }\n            }\n            $parent[$childrenKey] = [];\n            $groupedByParent[$parentValue] = $parent;\n        }\n        \n        \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3042\u308c\u3070\u8ffd\u52a0\n        if (!empty($row[$childKey])) {\n            $child = [];\n            \n            \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u62bd\u51fa\n            if (isset($config['childFields'])) {\n                foreach ($config['childFields'] as $field) {\n                    $child[$field] = $row[$field] ?? null;\n                }\n            }\n            \n            $groupedByParent[$parentValue][$childrenKey][] = $child;\n        }\n    }\n    \n    \/\/ \u914d\u5217\u306b\u5909\u63db\n    return array_values($groupedByParent);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u51e6\u7406\n$sql = \"SELECT \n            d.id as department_id, \n            d.name as department_name,\n            e.id as employee_id,\n            e.name as employee_name,\n            e.job_title,\n            e.salary\n        FROM \n            ## \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u30c7\u30fc\u30bf\u51e6\u7406\n\n\u914d\u5217\u306f\u69d8\u3005\u306a\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u5909\u63db\u3001JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u306a\u3069\u3001\u5b9f\u52d9\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n### CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u914d\u5217\u5909\u63db\n\nCSV\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u4e00\u822c\u7684\u306a\u5f62\u5f0f\u3067\u3059\u3002PHP\u306b\u306f\u3001CSV\u30c7\u30fc\u30bf\u3092\u6271\u3046\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\n\n#### \u57fa\u672c\u7684\u306aCSV\u8aad\u307f\u8fbc\u307f\n\n```php\n\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u3001\u9023\u60f3\u914d\u5217\u306e\u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\n * \n * @param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return array \u9023\u60f3\u914d\u5217\u306e\u914d\u5217\n *\/\nfunction readCsv($filename, $hasHeader = true) {\n    $data = [];\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'r');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n    $headers = $hasHeader ? fgetcsv($handle) : null;\n    \n    \/\/ \u5404\u884c\u3092\u51e6\u7406\n    while (($row = fgetcsv($handle)) !== false) {\n        if ($headers) {\n            \/\/ \u30d8\u30c3\u30c0\u30fc\u3068\u5024\u3092\u95a2\u9023\u4ed8\u3051\u308b\n            $data[] = array_combine($headers, $row);\n        } else {\n            \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u306a\u3044\u5834\u5408\u306f\u6dfb\u5b57\u914d\u5217\u3068\u3057\u3066\u6271\u3046\n            $data[] = $row;\n        }\n    }\n    \n    fclose($handle);\n    return $data;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    $users = readCsv('users.csv');\n    foreach ($users as $user) {\n        echo \"\u540d\u524d: {$user['name']}, \u30e1\u30fc\u30eb: {$user['email']}\\n\";\n    }\n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-298\">\u5927\u898f\u6a21CSV\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/h4>\n\n\n\n<p>\u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u3068\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3088\u304f\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3080\n * \n * @param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return Generator \u9023\u60f3\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\n *\/\nfunction readCsvLazy($filename, $hasHeader = true) {\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'r');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    try {\n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n        $headers = $hasHeader ? fgetcsv($handle) : null;\n        \n        \/\/ \u5404\u884c\u3092\u751f\u6210\n        while (($row = fgetcsv($handle)) !== false) {\n            if ($headers) {\n                \/\/ \u884c\u306e\u5217\u6570\u304c\u30d8\u30c3\u30c0\u30fc\u3068\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u5bfe\u5fdc\n                if (count($row) &lt; count($headers)) {\n                    $row = array_pad($row, count($headers), null);\n                } elseif (count($row) &gt; count($headers)) {\n                    $row = array_slice($row, 0, count($headers));\n                }\n                \n                yield array_combine($headers, $row);\n            } else {\n                yield $row;\n            }\n        }\n    } finally {\n        fclose\n<\/pre>\n\n\n\n<p>$sql = \u201cSELECT d.id as department_id, d.name as department_name, e.id as employee_id, e.name as employee_name, e.job_title, e.salary FROM departments d LEFT JOIN employees e ON d.id = e.department_id ORDER BY d.id, e.id\u201d;<\/p>\n\n\n\n<p>$results = fetchAll($sql);<\/p>\n\n\n\n<p>\/\/ \u90e8\u9580\u3054\u3068\u306b\u5f93\u696d\u54e1\u3092\u30b0\u30eb\u30fc\u30d7\u5316 $nestedResults = nestResults($results, [ \u2018parentKey\u2019 =&gt; \u2018department_id\u2019, \u2018childKey\u2019 =&gt; \u2018employee_id\u2019, \u2018childrenKey\u2019 =&gt; \u2018employees\u2019, \u2018childFields\u2019 =&gt; [\u2018employee_id\u2019, \u2018employee_name\u2019, \u2018job_title\u2019, \u2018salary\u2019] ]);<\/p>\n\n\n\n<p>\/\/ \u7d50\u679c\u3092\u8868\u793a foreach ($nestedResults as $department) { echo \u201c{$department[\u2018department_name\u2019]} (ID: {$department[\u2018department_id\u2019]}):\\n\u201d;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if (empty($department['employees'])) {\n    echo \"  \u5f93\u696d\u54e1\u306a\u3057\\n\";\n} else {\n    foreach ($department['employees'] as $employee) {\n        echo \"  - {$employee['employee_name']} ({$employee['job_title']}): \u00a5\" . \n             number_format($employee['salary']) . \"\\n\";\n    }\n}\necho \"\\n\";\n<\/pre>\n\n\n\n<p>}<\/p>\n\n\n\n<p>\/\/ \u5f93\u696d\u54e1ID\u3092\u30ad\u30fc\u306b\u7d22\u5f15\u4ed8\u3051 $employeesById = indexResultsByKey($results, \u2018employee_id\u2019); $employeeId = 123;<\/p>\n\n\n\n<p>if (isset($employeesById[$employeeId])) { $employee = $employeesById[$employeeId]; echo \u201c\u5f93\u696d\u54e1ID {$employeeId} \u306e\u60c5\u5831:\\n\u201d; echo \u201c\u540d\u524d: {$employee[\u2018employee_name\u2019]}\\n\u201d; echo \u201c\u90e8\u9580: {$employee[\u2018department_name\u2019]}\\n\u201d; echo \u201c\u8077\u7a2e: {$employee[\u2018job_title\u2019]}\\n\u201d; } else { echo \u201c\u5f93\u696d\u54e1ID {$employeeId} \u306f\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\\n\u201d; }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n#### \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\n\n```php\n\/**\n * \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u51e6\u7406\n * \n * @param string $sql \u57fa\u672cSQL\u30af\u30a8\u30ea\n * @param callable $processor \u5404\u30c1\u30e3\u30f3\u30af\u3092\u51e6\u7406\u3059\u308b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\n * @param string $idColumn ID\u5217\u540d\n * @param int $lastId \u524d\u56de\u51e6\u7406\u3057\u305f\u6700\u5f8c\u306eID\n * @param int $chunkSize \u4e00\u5ea6\u306b\u51e6\u7406\u3059\u308b\u884c\u6570\n * @return int \u51e6\u7406\u3057\u305f\u884c\u6570\n *\/\nfunction processLargeDataset($sql, $processor, $idColumn = 'id', $lastId = 0, $chunkSize = 1000) {\n    $pdo = getDbConnection();\n    $processed = 0;\n    \n    while (true) {\n        \/\/ \u30c1\u30e3\u30f3\u30af\u3092\u53d6\u5f97\u3059\u308bSQL\u3092\u69cb\u7bc9\n        $chunkSql = $sql . \" WHERE {$idColumn} &gt; ? ORDER BY {$idColumn} LIMIT {$chunkSize}\";\n        $stmt = $pdo-&gt;prepare($chunkSql);\n        $stmt-&gt;execute([$lastId]);\n        \n        $chunk = $stmt-&gt;fetchAll();\n        \n        \/\/ \u30c1\u30e3\u30f3\u30af\u304c\u7a7a\u306a\u3089\u7d42\u4e86\n        if (empty($chunk)) {\n            break;\n        }\n        \n        \/\/ \u30c1\u30e3\u30f3\u30af\u3092\u51e6\u7406\n        $processor($chunk);\n        \n        \/\/ \u51e6\u7406\u3057\u305f\u884c\u6570\u3092\u8ffd\u52a0\n        $processed += count($chunk);\n        \n        \/\/ \u6b21\u306e\u30c1\u30e3\u30f3\u30af\u306e\u305f\u3081\u306e\u6700\u5f8c\u306eID\u3092\u66f4\u65b0\n        $lastId = end($chunk)[$idColumn];\n    }\n    \n    return $processed;\n}\n\n\/**\n * \u30d0\u30eb\u30af\u30a4\u30f3\u30b5\u30fc\u30c8\u7528\u306eSQL\u6587\u3092\u751f\u6210\n * \n * @param string $table \u30c6\u30fc\u30d6\u30eb\u540d\n * @param array $columns \u30ab\u30e9\u30e0\u540d\u306e\u914d\u5217\n * @param array $rows \u633f\u5165\u3059\u308b\u30c7\u30fc\u30bf\u306e\u914d\u5217\n * @return string \u30d0\u30eb\u30af\u30a4\u30f3\u30b5\u30fc\u30c8\u7528\u306eSQL\u6587\n *\/\nfunction buildBulkInsertSql($table, $columns, $rows) {\n    $columnList = implode(', ', array_map(function($col) {\n        return \"`$col`\";\n    }, $columns));\n    \n    $placeholders = [];\n    $params = [];\n    \n    foreach ($rows as $row) {\n        $rowPlaceholders = [];\n        \n        foreach ($columns as $column) {\n            $rowPlaceholders[] = '?';\n            $params[] = $row[$column] ?? null;\n        }\n        \n        $placeholders[] = '(' . implode(', ', $rowPlaceholders) . ')';\n    }\n    \n    $valuesList = implode(', ', $placeholders);\n    \n    $sql = \"INSERT INTO `$table` ($columnList) VALUES $valuesList\";\n    \n    return ['sql' =&gt; $sql, 'params' =&gt; $params];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u5927\u898f\u6a21\u306a\u30ed\u30b0\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3068\u96c6\u8a08\n$baseSql = \"SELECT * FROM access_logs\";\n$stats = [\n    'total' =&gt; 0,\n    'by_date' =&gt; [],\n    'by_url' =&gt; [],\n    'by_status' =&gt; []\n];\n\n$processed = processLargeDataset($baseSql, function($chunk) use (&amp;$stats) {\n    foreach ($chunk as $log) {\n        \/\/ \u5408\u8a08\u30ab\u30a6\u30f3\u30c8\n        $stats['total']++;\n        \n        \/\/ \u65e5\u4ed8\u3054\u3068\u306e\u96c6\u8a08\n        $date = substr($log['timestamp'], 0, 10);\n        if (!isset($stats['by_date'][$date])) {\n            $stats['by_date'][$date] = 0;\n        }\n        $stats['by_date'][$date]++;\n        \n        \/\/ URL\u3054\u3068\u306e\u96c6\u8a08\n        $url = $log['url'];\n        if (!isset($stats['by_url'][$url])) {\n            $stats['by_url'][$url] = 0;\n        }\n        $stats['by_url'][$url]++;\n        \n        \/\/ \u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3054\u3068\u306e\u96c6\u8a08\n        $status = $log['status_code'];\n        if (!isset($stats['by_status'][$status])) {\n            $stats['by_status'][$status] = 0;\n        }\n        $stats['by_status'][$status]++;\n    }\n}, 'id', 0, 5000);\n\necho \"\u51e6\u7406\u5b8c\u4e86: {$processed} \u4ef6\u306e\u30ed\u30b0\u3092\u51e6\u7406\u3057\u307e\u3057\u305f\u3002\\n\";\n\n\/\/ \u65e5\u4ed8\u3054\u3068\u306e\u30a2\u30af\u30bb\u30b9\u6570\uff08\u4e0a\u4f4d5\u65e5\uff09\narsort($stats['by_date']);\necho \"\u65e5\u4ed8\u3054\u3068\u306e\u30a2\u30af\u30bb\u30b9\u6570\uff08\u4e0a\u4f4d5\u65e5\uff09:\\n\";\n$i = 0;\nforeach ($stats['by_date'] as $date =&gt; $count) {\n    echo \"  {$date}: \" . number_format($count) . \"\u4ef6\\n\";\n    if (++$i &gt;= 5) break;\n}\n\n\/\/ \u30a2\u30af\u30bb\u30b9\u306e\u591a\u3044URL\uff08\u4e0a\u4f4d5\u4ef6\uff09\narsort($stats['by_url']);\necho \"\u30a2\u30af\u30bb\u30b9\u306e\u591a\u3044URL\uff08\u4e0a\u4f4d5\u4ef6\uff09:\\n\";\n$i = 0;\nforeach ($stats['by_url'] as $url =&gt; $count) {\n    echo \"  {$url}: \" . number_format($count) . \"\u4ef6\\n\";\n    if (++$i &gt;= 5) break;\n}\n\n\/\/ \u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3054\u3068\u306e\u96c6\u8a08\necho \"\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3054\u3068\u306e\u96c6\u8a08:\\n\";\nforeach ($stats['by_status'] as $status =&gt; $count) {\n    $percentage = round(($count \/ $stats['total']) * 100, 2);\n    echo \"  {$status}: \" . number_format($count) . \"\u4ef6 ({$percentage}%)\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-299\">\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u5909\u63db\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u4f8b<\/h3>\n\n\n\n<p>\u4ee5\u4e0a\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3001\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u5909\u63db\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u307f\u3001\u5909\u63db\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\n * \n * @param string $csvFile CSV\u5165\u529b\u30d5\u30a1\u30a4\u30eb\n * @param array $fieldMapping \u30d5\u30a3\u30fc\u30eb\u30c9\u30de\u30c3\u30d4\u30f3\u30b0\u8a2d\u5b9a\n * @param array $validators \u691c\u8a3c\u30eb\u30fc\u30eb\n * @param array $transformers \u5909\u63db\u30eb\u30fc\u30eb\n * @return array \u51e6\u7406\u7d71\u8a08\n *\/\nfunction importCsvToDatabase($csvFile, $fieldMapping, $validators = [], $transformers = []) {\n    $stats = [\n        'total' =&gt; 0,\n        'successful' =&gt; 0,\n        'failed' =&gt; 0,\n        'errors' =&gt; []\n    ];\n    \n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\n    $pdo = getDbConnection();\n    $pdo-&gt;beginTransaction();\n    \n    try {\n        \/\/ CSV\u3092\u8aad\u307f\u8fbc\u3080\n        $generator = readCsvLazy($csvFile);\n        $batchSize = 100;\n        $batch = [];\n        \n        foreach ($generator as $index =&gt; $row) {\n            $stats['total']++;\n            \n            try {\n                \/\/ 1. \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30de\u30c3\u30d4\u30f3\u30b0\n                $mapped = [];\n                foreach ($fieldMapping as $csvField =&gt; $dbField) {\n                    $mapped[$dbField] = $row[$csvField] ?? null;\n                }\n                \n                \/\/ 2. \u691c\u8a3c\n                $validationErrors = [];\n                foreach ($validators as $field =&gt; $validationRules) {\n                    $value = $mapped[$field] ?? null;\n                    \n                    foreach ($validationRules as $rule) {\n                        $valid = true;\n                        $errorMessage = \"\";\n                        \n                        if (is_callable($rule)) {\n                            \/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306b\u3088\u308b\u691c\u8a3c\n                            $result = $rule($value, $mapped);\n                            if ($result !== true) {\n                                $valid = false;\n                                $errorMessage = is_string($result) ? $result : \"\u691c\u8a3c\u30a8\u30e9\u30fc: {$field}\";\n                            }\n                        } elseif (is_array($rule) &amp;&amp; isset($rule['type'])) {\n                            \/\/ \u578b\u691c\u8a3c\n                            switch ($rule['type']) {\n                                case 'required':\n                                    if ($value === null || $value === '') {\n                                        $valid = false;\n                                        $errorMessage = $rule['message'] ?? \"\u30d5\u30a3\u30fc\u30eb\u30c9 {$field} \u306f\u5fc5\u9808\u3067\u3059\";\n                                    }\n                                    break;\n                                case 'email':\n                                    if ($value &amp;&amp; !filter_var($value, FILTER_VALIDATE_EMAIL)) {\n                                        $valid = false;\n                                        $errorMessage = $rule['message'] ?? \"\u30d5\u30a3\u30fc\u30eb\u30c9 {$field} \u306f\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n                                    }\n                                    break;\n                                case 'numeric':\n                                    if ($value &amp;&amp; !is_numeric($value)) {\n                                        $valid = false;\n                                        $errorMessage = $rule['message'] ?? \"\u30d5\u30a3\u30fc\u30eb\u30c9 {$field} \u306f\u6570\u5024\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n                                    }\n                                    break;\n                                case 'date':\n                                    if ($value &amp;&amp; strtotime($value) === false) {\n                                        $valid = false;\n                                        $errorMessage = $rule['message'] ?? \"\u30d5\u30a3\u30fc\u30eb\u30c9 {$field} \u306f\u6709\u52b9\u306a\u65e5\u4ed8\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n                                    }\n                                    break;\n                            }\n                        }\n                        \n                        if (!$valid) {\n                            $validationErrors[] = $errorMessage;\n                        }\n                    }\n                }\n                \n                if (!empty($validationErrors)) {\n                    throw new Exception(\"\u691c\u8a3c\u30a8\u30e9\u30fc: \" . implode(\", \", $validationErrors));\n                }\n                \n                \/\/ 3. \u5909\u63db\n                foreach ($transformers as $field =&gt; $transformer) {\n                    if (isset($mapped[$field]) &amp;&amp; is_callable($transformer)) {\n                        $mapped[$field] = $transformer($mapped[$field], $mapped);\n                    }\n                }\n                \n                \/\/ 4. \u30d0\u30c3\u30c1\u306b\u8ffd\u52a0\n                $batch[] = $mapped;\n                \n                \/\/ \u30d0\u30c3\u30c1\u30b5\u30a4\u30ba\u306b\u9054\u3057\u305f\u3089\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u66f8\u304d\u8fbc\u307f\n                if (count($batch) &gt;= $batchSize) {\n                    saveBatchToDatabase($pdo, $batch);\n                    $stats['successful'] += count($batch);\n                    $batch = [];\n                }\n                \n            } catch (Exception $e) {\n                $stats['failed']++;\n                $stats['errors'][] = [\n                    'row' =&gt; $index + 1,\n                    'data' =&gt; $row,\n                    'error' =&gt; $e-&gt;getMessage()\n                ];\n            }\n            \n            \/\/ \u9032\u6357\u8868\u793a\uff081000\u884c\u3054\u3068\uff09\n            if ($stats['total'] % 1000 === 0) {\n                echo \"\u51e6\u7406\u4e2d: \" . number_format($stats['total']) . \" \u884c...\\n\";\n            }\n        }\n        \n        \/\/ \u6b8b\u308a\u306e\u30d0\u30c3\u30c1\u3092\u4fdd\u5b58\n        if (!empty($batch)) {\n            saveBatchToDatabase($pdo, $batch);\n            $stats['successful'] += count($batch);\n        }\n        \n        \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u30b3\u30df\u30c3\u30c8\n        $pdo-&gt;commit();\n        \n    } catch (Exception $e) {\n        \/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\n        $pdo-&gt;rollBack();\n        throw new Exception(\"\u30a4\u30f3\u30dd\u30fc\u30c8\u51e6\u7406\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n    }\n    \n    return $stats;\n}\n\n\/**\n * \u30c7\u30fc\u30bf\u30d0\u30c3\u30c1\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\n * \n * @param PDO $pdo PDO\u63a5\u7d9a\n * @param array $batch \u4fdd\u5b58\u3059\u308b\u30c7\u30fc\u30bf\u30d0\u30c3\u30c1\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction saveBatchToDatabase($pdo, $batch) {\n    if (empty($batch)) {\n        return true;\n    }\n    \n    \/\/ \u6700\u521d\u306e\u884c\u304b\u3089\u30ab\u30e9\u30e0\u3092\u53d6\u5f97\n    $firstRow = reset($batch);\n    $columns = array_keys($firstRow);\n    \n    \/\/ \u30d0\u30eb\u30af\u30a4\u30f3\u30b5\u30fc\u30c8\u7528\u306eSQL\u3092\u69cb\u7bc9\n    $bulkInsert = buildBulkInsertSql('users', $columns, $batch);\n    \n    \/\/ SQL\u3092\u5b9f\u884c\n    $stmt = $pdo-&gt;prepare($bulkInsert['sql']);\n    return $stmt-&gt;execute($bulkInsert['params']);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u30a4\u30f3\u30dd\u30fc\u30c8\n$fieldMapping = [\n    'First Name' =&gt; 'first_name',\n    'Last Name' =&gt; 'last_name',\n    'Email Address' =&gt; 'email',\n    'Birth Date' =&gt; 'birth_date',\n    'Status' =&gt; 'status'\n];\n\n$validators = [\n    'first_name' =&gt; [\n        ['type' =&gt; 'required', 'message' =&gt; '\u540d\u306f\u5fc5\u9808\u3067\u3059']\n    ],\n    'last_name' =&gt; [\n        ['type' =&gt; 'required', 'message' =&gt; '\u59d3\u306f\u5fc5\u9808\u3067\u3059']\n    ],\n    'email' =&gt; [\n        ['type' =&gt; 'required', 'message' =&gt; '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059'],\n        ['type' =&gt; 'email', 'message' =&gt; '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044'],\n        \/\/ \u30ab\u30b9\u30bf\u30e0\u691c\u8a3c\uff1a\u4e00\u610f\u6027\u30c1\u30a7\u30c3\u30af\n        function($value) {\n            $pdo = getDbConnection();\n            $stmt = $pdo-&gt;prepare(\"SELECT COUNT(*) FROM users WHERE email = ?\");\n            $stmt-&gt;execute([$value]);\n            $count = $stmt-&gt;fetchColumn();\n            return $count === 0 ? true : \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9 '{$value}' \u306f\u65e2\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\";\n        }\n    ],\n    'birth_date' =&gt; [\n        ['type' =&gt; 'date', 'message' =&gt; '\u6709\u52b9\u306a\u751f\u5e74\u6708\u65e5\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044']\n    ]\n];\n\n$transformers = [\n    'first_name' =&gt; function($value) {\n        return ucfirst(strtolower(trim($value)));\n    },\n    'last_name' =&gt; function($value) {\n        return ucfirst(strtolower(trim($value)));\n    },\n    'email' =&gt; function($value) {\n        return strtolower(trim($value));\n    },\n    'birth_date' =&gt; function($value) {\n        return $value ? date('Y-m-d', strtotime($value)) : null;\n    },\n    'status' =&gt; function($value) {\n        $value = strtolower(trim($value));\n        \/\/ \u30b9\u30c6\u30fc\u30bf\u30b9\u5024\u306e\u6b63\u898f\u5316\n        $statusMap = [\n            'active' =&gt; 'active',\n            'inactive' =&gt; 'inactive',\n            'pending' =&gt; 'pending',\n            'a' =&gt; 'active',\n            'i' =&gt; 'inactive',\n            'p' =&gt; 'pending',\n            'yes' =&gt; 'active',\n            'no' =&gt; 'inactive',\n            '1' =&gt; 'active',\n            '0' =&gt; 'inactive'\n        ];\n        return $statusMap[$value] ?? 'inactive';\n    },\n    \/\/ \u6d3e\u751f\u30d5\u30a3\u30fc\u30eb\u30c9\n    'full_name' =&gt; function($value, $row) {\n        return $row['first_name'] . ' ' . $row['last_name'];\n    },\n    'created_at' =&gt; function() {\n        return date('Y-m-d H:i:s');\n    }\n];\n\ntry {\n    $result = importCsvToDatabase('users.csv', $fieldMapping, $validators, $transformers);\n    \n    echo \"\u30a4\u30f3\u30dd\u30fc\u30c8\u5b8c\u4e86:\\n\";\n    echo \"  \u5408\u8a08\u51e6\u7406: \" . number_format($result['total']) . \" \u884c\\n\";\n    echo \"  \u6210\u529f: \" . number_format($result['successful']) . \" \u884c\\n\";\n    echo \"  \u5931\u6557: \" . number_format($result['failed']) . \" \u884c\\n\";\n    \n    if ($result['failed'] &gt; 0) {\n        echo \"\\n\u30a8\u30e9\u30fc\u306e\u5148\u982d10\u4ef6:\\n\";\n        $errors = array_slice($result['errors'], 0, 10);\n        foreach ($errors as $error) {\n            echo \"  \u884c {$error['row']}: {$error['error']}\\n\";\n        }\n        \n        \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u3092JSON\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\n        $errorLog = 'import_errors_' . date('Ymd_His') . '.json';\n        file_put_contents($errorLog, json_encode($result['errors'], JSON_PRETTY_PRINT));\n        echo \"\\n\u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u306f {$errorLog} \u306b\u4fdd\u5b58\u3055\u308c\u307e\u3057\u305f\u3002\\n\";\n    }\n} catch (Exception $e) {\n    echo \"\u81f4\u547d\u7684\u306a\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\";\n}\n<\/pre>\n\n\n\n<p>\u914d\u5217\u3092\u6d3b\u7528\u3057\u305f\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001PHP\u958b\u767a\u306e\u52b9\u7387\u3068\u67d4\u8edf\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002CSV\u3084JSON\u306e\u51e6\u7406\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u64cd\u4f5c\u3001\u305d\u3057\u3066\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u5909\u63db\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u5b9f\u88c5\u3092\u901a\u3058\u3066\u3001\u591a\u304f\u306e\u5b9f\u52d9\u30b7\u30ca\u30ea\u30aa\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u3092\u4f7f\u3063\u305f\u3055\u3089\u306b\u5b9f\u8df5\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u4f8b\u3068\u3057\u3066\u3001\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002\/**<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3080<\/li>\n\n\n\n<li>@param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9<\/li>\n\n\n\n<li>@param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b<\/li>\n\n\n\n<li>@return Generator \u9023\u60f3\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf *\/ function readCsvLazy($filename, $hasHeader = true) { \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f $handle = fopen($filename, \u2018r\u2019); if ($handle === false) { throw new Exception(\u201c\u30d5\u30a1\u30a4\u30eb \u2018$filename\u2019 \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\u201d); } try { \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080 $headers = $hasHeader ? fgetcsv($handle) : null; <code>\/\/ \u5404\u884c\u3092\u751f\u6210 while (($row = fgetcsv($handle)) !== false) { if ($headers) { \/\/ \u884c\u306e\u5217\u6570\u304c\u30d8\u30c3\u30c0\u30fc\u3068\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u5bfe\u5fdc if (count($row) &lt; count($headers)) { $row = array_pad($row, count($headers), null); } elseif (count($row) &gt; count($headers)) { $row = array_slice($row, 0, count($headers)); } yield array_combine($headers, $row); } else { yield $row; } }<\/code> } finally { fclose($handle); } }<\/li>\n<\/ul>\n\n\n\n<p>\/\/ \u4f7f\u7528\u4f8b\uff1a100\u4e07\u884c\u306eCSV\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406 try { $totalAge = 0; $count = 0;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">foreach (readCsvLazy('large_users.csv') as $index =&gt; $user) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\u3092\u52a0\u7b97\n    $totalAge += (int)$user['age'];\n    $count++;\n    \n    \/\/ \u9032\u6357\u8868\u793a\uff0810,000\u884c\u3054\u3068\uff09\n    if ($index % 10000 === 0) {\n        echo \"\u51e6\u7406\u4e2d: \" . number_format($index) . \" \u884c...\\n\";\n    }\n}\n\n\/\/ \u5e73\u5747\u5e74\u9f62\u3092\u8a08\u7b97\n$averageAge = $count &gt; 0 ? $totalAge \/ $count : 0;\necho \"\u51e6\u7406\u5b8c\u4e86: \" . number_format($count) . \" \u884c\\n\";\necho \"\u5e73\u5747\u5e74\u9f62: \" . number_format($averageAge, 1) . \" \u6b73\\n\";\n<\/pre>\n\n\n\n<p>} catch (Exception $e) { echo \u201c\u30a8\u30e9\u30fc: \u201d . $e-&gt;getMessage(); }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n#### CSV\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u3068\u6b63\u898f\u5316\n\n\u5b9f\u969b\u306eCSV\u30c7\u30fc\u30bf\u306f\u3001\u3057\u3070\u3057\u3070\u4e0d\u5b8c\u5168\u3067\u3042\u3063\u305f\u308a\u5f62\u5f0f\u304c\u4e00\u8cab\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u3001\u6b63\u898f\u5316\u3059\u308b\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n```php\n\/**\n * CSV\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u6b63\u898f\u5316\u3059\u308b\n * \n * @param array $data CSV\u304b\u3089\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u914d\u5217\n * @param array $schema \u691c\u8a3c\u30fb\u5909\u63db\u30eb\u30fc\u30eb\u306e\u30b9\u30ad\u30fc\u30de\n * @return array \u691c\u8a3c\u7d50\u679c\u3068\u6b63\u898f\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\n *\/\nfunction validateAndNormalizeCsvData(array $data, array $schema) {\n    $result = [\n        'valid' =&gt; [], \/\/ \u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\n        'invalid' =&gt; [], \/\/ \u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\n        'errors' =&gt; [] \/\/ \u30a8\u30e9\u30fc\u60c5\u5831\n    ];\n    \n    foreach ($data as $index =&gt; $row) {\n        $isValid = true;\n        $normalizedRow = [];\n        $rowErrors = [];\n        \n        \/\/ \u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u691c\u8a3c\u30fb\u6b63\u898f\u5316\n        foreach ($schema as $field =&gt; $rules) {\n            $value = $row[$field] ?? null;\n            \n            \/\/ \u5fc5\u9808\u30c1\u30a7\u30c3\u30af\n            if (isset($rules['required']) &amp;&amp; $rules['required'] &amp;&amp; ($value === null || $value === '')) {\n                $isValid = false;\n                $rowErrors[] = \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306f\u5fc5\u9808\u3067\u3059\";\n                continue;\n            }\n            \n            \/\/ \u5024\u304c\u306a\u3044\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\n            if (($value === null || $value === '') &amp;&amp; isset($rules['default'])) {\n                $value = $rules['default'];\n            }\n            \n            \/\/ \u578b\u5909\u63db\n            if (isset($rules['type'])) {\n                switch ($rules['type']) {\n                    case 'int':\n                        $value = filter_var($value, FILTER_VALIDATE_INT) !== false ? (int)$value : null;\n                        break;\n                    case 'float':\n                        $value = filter_var($value, FILTER_VALIDATE_FLOAT) !== false ? (float)$value : null;\n                        break;\n                    case 'bool':\n                        $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);\n                        break;\n                    case 'email':\n                        $value = filter_var($value, FILTER_VALIDATE_EMAIL) !== false ? $value : null;\n                        break;\n                }\n                \n                \/\/ \u578b\u5909\u63db\u306b\u5931\u6557\u3057\u305f\u5834\u5408\n                if ($value === null &amp;&amp; isset($rules['required']) &amp;&amp; $rules['required']) {\n                    $isValid = false;\n                    $rowErrors[] = \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306f\u6709\u52b9\u306a {$rules['type']} \u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n                }\n            }\n            \n            \/\/ \u30ab\u30b9\u30bf\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n            if (isset($rules['validate']) &amp;&amp; is_callable($rules['validate'])) {\n                $validateResult = $rules['validate']($value);\n                if ($validateResult !== true) {\n                    $isValid = false;\n                    $rowErrors[] = is_string($validateResult) ? $validateResult : \"\u30d5\u30a3\u30fc\u30eb\u30c9 '$field' \u306e\u691c\u8a3c\u306b\u5931\u6557\u3057\u307e\u3057\u305f\";\n                }\n            }\n            \n            \/\/ \u5909\u63db\u95a2\u6570\n            if (isset($rules['transform']) &amp;&amp; is_callable($rules['transform'])) {\n                $value = $rules['transform']($value);\n            }\n            \n            $normalizedRow[$field] = $value;\n        }\n        \n        \/\/ \u691c\u8a3c\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u5206\u985e\n        if ($isValid) {\n            $result['valid'][] = $normalizedRow;\n        } else {\n            $normalizedRow['_original'] = $row; \/\/ \u5143\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n            $normalizedRow['_errors'] = $rowErrors;\n            $result['invalid'][] = $normalizedRow;\n            $result['errors'][$index] = $rowErrors;\n        }\n    }\n    \n    return $result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u3068\u6b63\u898f\u5316\n$userData = readCsv('users.csv');\n\n$schema = [\n    'name' =&gt; [\n        'required' =&gt; true,\n        'transform' =&gt; function($value) {\n            return trim(ucwords(strtolower($value)));\n        }\n    ],\n    'email' =&gt; [\n        'required' =&gt; true,\n        'type' =&gt; 'email',\n        'transform' =&gt; 'strtolower'\n    ],\n    'age' =&gt; [\n        'type' =&gt; 'int',\n        'validate' =&gt; function($value) {\n            if ($value &lt; 18 || $value &gt; 120) {\n                return \"\u5e74\u9f62\u306f18\u301c120\u306e\u9593\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\";\n            }\n            return true;\n        }\n    ],\n    'active' =&gt; [\n        'type' =&gt; 'bool',\n        'default' =&gt; false\n    ],\n    'registration_date' =&gt; [\n        'transform' =&gt; function($value) {\n            return $value ? date('Y-m-d', strtotime($value)) : null;\n        }\n    ]\n];\n\n$result = validateAndNormalizeCsvData($userData, $schema);\n\necho \"\u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9: \" . count($result['valid']) . \"\\n\";\necho \"\u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9: \" . count($result['invalid']) . \"\\n\";\n\n\/\/ \u6709\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\u3092\u51e6\u7406\nforeach ($result['valid'] as $user) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u4fdd\u5b58\u3059\u308b\u306a\u3069\u306e\u51e6\u7406\n}\n\n\/\/ \u7121\u52b9\u306a\u30ec\u30b3\u30fc\u30c9\u3092\u30a8\u30e9\u30fc\u30ed\u30b0\u306b\u8a18\u9332\nforeach ($result['invalid'] as $user) {\n    $errorMessages = implode(', ', $user['_errors']);\n    error_log(\"\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u30a8\u30e9\u30fc: {$errorMessages}\");\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-300\">CSV\u30a8\u30af\u30b9\u30dd\u30fc\u30c8<\/h4>\n\n\n\n<p>\u914d\u5217\u30c7\u30fc\u30bf\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u4f8b\u3082\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u30c7\u30fc\u30bf\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\n * \n * @param array $data \u66f8\u304d\u51fa\u3059\u30c7\u30fc\u30bf\u914d\u5217\n * @param string $filename \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d\n * @param array $headers \u51fa\u529b\u3059\u308b\u30d8\u30c3\u30c0\u30fc\uff08\u7701\u7565\u6642\u306f\u6700\u521d\u306e\u884c\u306e\u30ad\u30fc\u3092\u4f7f\u7528\uff09\n * @return int \u66f8\u304d\u51fa\u3057\u305f\u884c\u6570\n *\/\nfunction writeCsv(array $data, string $filename, array $headers = null) {\n    if (empty($data)) {\n        return 0;\n    }\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u6700\u521d\u306e\u884c\u306e\u30ad\u30fc\u3092\u4f7f\u7528\n    if ($headers === null) {\n        $headers = array_keys(reset($data));\n    }\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'w');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u66f8\u304d\u8fbc\u307f\u7528\u306b\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    try {\n        \/\/ BOM\u306a\u3057UTF-8\u3092\u660e\u793a\n        fprintf($handle, chr(0xEF).chr(0xBB).chr(0xBF));\n        \n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u66f8\u304d\u8fbc\u3080\n        fputcsv($handle, $headers);\n        \n        \/\/ \u30c7\u30fc\u30bf\u884c\u3092\u66f8\u304d\u8fbc\u3080\n        $count = 0;\n        foreach ($data as $row) {\n            \/\/ \u6307\u5b9a\u3055\u308c\u305f\u30d8\u30c3\u30c0\u30fc\u306b\u5bfe\u5fdc\u3059\u308b\u5024\u3092\u62bd\u51fa\n            $values = [];\n            foreach ($headers as $header) {\n                $values[] = $row[$header] ?? '';\n            }\n            \n            fputcsv($handle, $values);\n            $count++;\n        }\n        \n        return $count;\n    } finally {\n        fclose($handle);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092CSV\u306b\u66f8\u304d\u51fa\u3059\n$users = [\n    [\n        'id' =&gt; 1,\n        'name' =&gt; '\u7530\u4e2d \u592a\u90ce',\n        'email' =&gt; 'tanaka@example.com',\n        'age' =&gt; 35,\n        'active' =&gt; true,\n        'last_login' =&gt; '2023-06-15'\n    ],\n    [\n        'id' =&gt; 2,\n        'name' =&gt; '\u4f50\u85e4 \u82b1\u5b50',\n        'email' =&gt; 'sato@example.com',\n        'age' =&gt; 28,\n        'active' =&gt; true,\n        'last_login' =&gt; '2023-06-10'\n    ]\n];\n\n\/\/ \u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3060\u3051\u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\n$exportHeaders = ['id', 'name', 'email', 'age'];\n$count = writeCsv($users, 'exported_users.csv', $exportHeaders);\necho \"{$count} \u4ef6\u306e\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3057\u307e\u3057\u305f\u3002\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-301\">JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>JSON\u306f\u3001API\u3084\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u305f\u3081\u306e\u6a19\u6e96\u7684\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3068JSON\u30c7\u30fc\u30bf\u306e\u9593\u3067\u5909\u63db\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-302\">\u57fa\u672c\u7684\u306aJSON\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP\u914d\u5217\u304b\u3089JSON\u3078\u306e\u5909\u63db\n$user = [\n    'id' =&gt; 1,\n    'name' =&gt; '\u7530\u4e2d \u592a\u90ce',\n    'email' =&gt; 'tanaka@example.com',\n    'skills' =&gt; ['PHP', 'JavaScript', 'MySQL'],\n    'active' =&gt; true\n];\n\n\/\/ \u914d\u5217\u304b\u3089JSON\u306b\u5909\u63db\n$json = json_encode($user);\necho $json . \"\\n\";\n\/\/ {\"id\":1,\"name\":\"\u7530\u4e2d \u592a\u90ce\",\"email\":\"tanaka@example.com\",\"skills\":[\"PHP\",\"JavaScript\",\"MySQL\"],\"active\":true}\n\n\/\/ JSON\u304b\u3089\u914d\u5217\u306b\u5909\u63db\n$decoded = json_decode($json, true); \/\/ \u7b2c2\u5f15\u6570\u3092true\u306b\u3059\u308b\u3068\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\nvar_dump($decoded);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-303\">\u30a8\u30f3\u30b3\u30fc\u30c9\u30fb\u30c7\u30b3\u30fc\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u6d3b\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u9ad8\u5ea6\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u305fJSON\u30a8\u30f3\u30b3\u30fc\u30c9\n * \n * @param mixed $data JSON\u306b\u5909\u63db\u3059\u308b\u30c7\u30fc\u30bf\n * @param bool $prettyPrint \u6574\u5f62\u51fa\u529b\u3059\u308b\u304b\u3069\u3046\u304b\n * @param bool $escapeUnicode Unicode\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u304b\u3069\u3046\u304b\n * @return string JSON\u6587\u5b57\u5217\n *\/\nfunction advancedJsonEncode($data, $prettyPrint = false, $escapeUnicode = false) {\n    $options = JSON_UNESCAPED_SLASHES;\n    \n    if ($prettyPrint) {\n        $options |= JSON_PRETTY_PRINT;\n    }\n    \n    if (!$escapeUnicode) {\n        $options |= JSON_UNESCAPED_UNICODE;\n    }\n    \n    $json = json_encode($data, $options);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception('JSON\u30a8\u30f3\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: ' . json_last_error_msg());\n    }\n    \n    return $json;\n}\n\n\/**\n * \u9ad8\u5ea6\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u305fJSON\u30c7\u30b3\u30fc\u30c9\n * \n * @param string $json \u30c7\u30b3\u30fc\u30c9\u3059\u308bJSON\u6587\u5b57\u5217\n * @param bool $assoc \u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\u304b\u3069\u3046\u304b\n * @param int $depth \u518d\u5e30\u306e\u6df1\u3055\n * @return mixed \u30c7\u30b3\u30fc\u30c9\u7d50\u679c\n *\/\nfunction advancedJsonDecode($json, $assoc = true, $depth = 512) {\n    $data = json_decode($json, $assoc, $depth, JSON_BIGINT_AS_STRING);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception('JSON\u30c7\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: ' . json_last_error_msg());\n    }\n    \n    return $data;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$complexData = [\n    'name' =&gt; '\u65e5\u672c\u8a9e\u306e\u540d\u524d',\n    'path' =&gt; 'C:\\\\path\\\\to\\\\file.txt',\n    'large_number' =&gt; 9223372036854775807,\n    'nested' =&gt; ['level1' =&gt; ['level2' =&gt; ['level3' =&gt; 'deep']]]\n];\n\n\/\/ \u6574\u5f62\u3055\u308c\u305fJSON\u51fa\u529b\uff08\u65e5\u672c\u8a9e\u306f\u305d\u306e\u307e\u307e\u3001\u30b9\u30e9\u30c3\u30b7\u30e5\u3082\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u306a\u3044\uff09\n$prettyJson = advancedJsonEncode($complexData, true, false);\necho $prettyJson . \"\\n\";\n\n\/\/ \u30c7\u30b3\u30fc\u30c9\uff08\u5927\u304d\u306a\u6574\u6570\u3082\u6587\u5b57\u5217\u3068\u3057\u3066\u4fdd\u6301\uff09\ntry {\n    $decoded = advancedJsonDecode($prettyJson);\n    var_dump($decoded['large_number']); \/\/ \u5927\u304d\u306a\u6574\u6570\u3082\u5b89\u5168\u306b\u51e6\u7406\n} catch (Exception $e) {\n    echo $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-304\">\u6df1\u3044\u30cd\u30b9\u30c8\u306e\u914d\u5217\u5909\u63db\u3068\u30d1\u30b9\u62bd\u51fa<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u30cd\u30b9\u30c8\u3055\u308c\u305fJSON\u30c7\u30fc\u30bf\u3092\u6271\u3046\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u304b\u3089\u6307\u5b9a\u30d1\u30b9\u306e\u5024\u3092\u53d6\u5f97\n * \n * @param array $array \u5bfe\u8c61\u306e\u914d\u5217\n * @param string|array $path \u30c9\u30c3\u30c8\u533a\u5207\u308a\u307e\u305f\u306f\u914d\u5217\u306e\u30d1\u30b9\n * @param mixed $default \u5024\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n * @return mixed \u898b\u3064\u304b\u3063\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n *\/\nfunction arrayGet($array, $path, $default = null) {\n    \/\/ \u30d1\u30b9\u304c\u6587\u5b57\u5217\u306e\u5834\u5408\u3001\u914d\u5217\u306b\u5909\u63db\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    \/\/ \u914d\u5217\u3067\u306a\u3051\u308c\u3070\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\n    if (!is_array($array)) {\n        return $default;\n    }\n    \n    \/\/ \u7a7a\u306e\u30d1\u30b9\u306a\u3089\u914d\u5217\u81ea\u4f53\u3092\u8fd4\u3059\n    if (empty($path)) {\n        return $array;\n    }\n    \n    \/\/ \u6700\u521d\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u53d6\u5f97\u3057\u3001\u30d1\u30b9\u304b\u3089\u524a\u9664\n    $segment = array_shift($path);\n    \n    \/\/ \u73fe\u5728\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u914d\u5217\u306b\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    if (!isset($array[$segment])) {\n        return $default;\n    }\n    \n    \/\/ \u30d1\u30b9\u306e\u6b8b\u308a\u304c\u3042\u308c\u3070\u518d\u5e30\u7684\u306b\u51e6\u7406\u3001\u306a\u3051\u308c\u3070\u5024\u3092\u8fd4\u3059\n    return empty($path) ? $array[$segment] : arrayGet($array[$segment], $path, $default);\n}\n\n\/**\n * \u30cd\u30b9\u30c8\u3055\u308c\u305f\u914d\u5217\u306b\u6307\u5b9a\u30d1\u30b9\u3067\u5024\u3092\u8a2d\u5b9a\n * \n * @param array &amp;$array \u5bfe\u8c61\u306e\u914d\u5217\uff08\u53c2\u7167\u6e21\u3057\uff09\n * @param string|array $path \u30c9\u30c3\u30c8\u533a\u5207\u308a\u307e\u305f\u306f\u914d\u5217\u306e\u30d1\u30b9\n * @param mixed $value \u8a2d\u5b9a\u3059\u308b\u5024\n * @return void\n *\/\nfunction arraySet(&amp;$array, $path, $value) {\n    \/\/ \u30d1\u30b9\u304c\u6587\u5b57\u5217\u306e\u5834\u5408\u3001\u914d\u5217\u306b\u5909\u63db\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    \/\/ \u53c2\u7167\u3092\u30b3\u30d4\u30fc\n    $current = &amp;$array;\n    \n    \/\/ \u30d1\u30b9\u306e\u6700\u5f8c\u306e\u8981\u7d20\u4ee5\u5916\u3092\u51e6\u7406\n    foreach ($path as $key) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u4f5c\u6210\n        if (!isset($current[$key]) || !is_array($current[$key])) {\n            $current[$key] = [];\n        }\n        \n        \/\/ \u53c2\u7167\u3092\u66f4\u65b0\n        $current = &amp;$current[$key];\n    }\n    \n    \/\/ \u5024\u3092\u8a2d\u5b9a\n    $current = $value;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u6df1\u3044\u30cd\u30b9\u30c8\u306eJSON\u30c7\u30fc\u30bf\u51e6\u7406\n$jsonString = '{\n    \"user\": {\n        \"profile\": {\n            \"name\": \"John Doe\",\n            \"contact\": {\n                \"email\": \"john@example.com\",\n                \"phone\": \"123-456-7890\"\n            }\n        },\n        \"settings\": {\n            \"theme\": \"dark\",\n            \"notifications\": {\n                \"email\": true,\n                \"push\": false\n            }\n        }\n    },\n    \"app\": {\n        \"version\": \"1.0.0\",\n        \"features\": [\"search\", \"export\", \"share\"]\n    }\n}';\n\n\/\/ JSON\u3092\u30c7\u30b3\u30fc\u30c9\n$data = json_decode($jsonString, true);\n\n\/\/ \u6df1\u304f\u30cd\u30b9\u30c8\u3055\u308c\u305f\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\n$email = arrayGet($data, 'user.profile.contact.email');\necho \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9: $email\\n\"; \/\/ john@example.com\n\n\/\/ \u5b58\u5728\u3057\u306a\u3044\u30d1\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\uff09\n$address = arrayGet($data, 'user.profile.address', '\u4f4f\u6240\u672a\u8a2d\u5b9a');\necho \"\u4f4f\u6240: $address\\n\"; \/\/ \u4f4f\u6240\u672a\u8a2d\u5b9a\n\n\/\/ \u5024\u306e\u8a2d\u5b9a\narraySet($data, 'user.settings.notifications.push', true);\n$pushEnabled = arrayGet($data, 'user.settings.notifications.push');\necho \"\u30d7\u30c3\u30b7\u30e5\u901a\u77e5: \" . ($pushEnabled ? '\u6709\u52b9' : '\u7121\u52b9') . \"\\n\"; \/\/ \u6709\u52b9\n\n\/\/ \u65b0\u3057\u3044\u30d1\u30b9\u306b\u5024\u3092\u8a2d\u5b9a\narraySet($data, 'user.profile.address', '\u6771\u4eac\u90fd\u6e0b\u8c37\u533a');\necho \"\u65b0\u3057\u3044\u4f4f\u6240: \" . arrayGet($data, 'user.profile.address') . \"\\n\"; \/\/ \u6771\u4eac\u90fd\u6e0b\u8c37\u533a\n\n\/\/ \u5909\u66f4\u3092\u53cd\u6620\u3057\u305fJSON\u306b\u5909\u63db\n$updatedJson = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);\necho \"\u66f4\u65b0\u3055\u308c\u305fJSON:\\n$updatedJson\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-305\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u51e6\u7406<\/h4>\n\n\n\n<p>JSON\u30d9\u30fc\u30b9\u306eAPI\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u51e6\u7406\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * JSON\u30d9\u30fc\u30b9\u306eAPI\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\n * \n * @param string $url API\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\n * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n * @param array $data \u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\n * @param array $headers \u8ffd\u52a0\u306eHTTP\u30d8\u30c3\u30c0\u30fc\n * @return array \u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\n *\/\nfunction apiRequest($url, $method = 'GET', $data = null, $headers = []) {\n    $ch = curl_init();\n    \n    \/\/ cURL\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\n    curl_setopt($ch, CURLOPT_URL, $url);\n    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);\n    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);\n    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);\n    \n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30d8\u30c3\u30c0\u30fc\u306e\u8a2d\u5b9a\n    $defaultHeaders = [\n        'Accept' =&gt; 'application\/json',\n        'Content-Type' =&gt; 'application\/json'\n    ];\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u306e\u7d50\u5408\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    $formattedHeaders = [];\n    foreach (array_merge($defaultHeaders, $headers) as $name =&gt; $value) {\n        $formattedHeaders[] = \"$name: $value\";\n    }\n    curl_setopt($ch, CURLOPT_HTTPHEADER, $formattedHeaders);\n    \n    \/\/ \u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u306fJSON\u3068\u3057\u3066\u9001\u4fe1\n    if ($data !== null &amp;&amp; ($method === 'POST' || $method === 'PUT' || $method === 'PATCH')) {\n        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));\n    }\n    \n    \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u5b9f\u884c\n    $response = curl_exec($ch);\n    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);\n    $error = curl_error($ch);\n    \n    curl_close($ch);\n    \n    \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n    if ($error) {\n        throw new Exception(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u30a8\u30e9\u30fc: $error\");\n    }\n    \n    \/\/ JSON\u30c7\u30b3\u30fc\u30c9\n    $decodedResponse = json_decode($response, true);\n    \n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new Exception(\"JSON\u30c7\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc: \" . json_last_error_msg());\n    }\n    \n    \/\/ HTTP\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\n    if ($httpCode &gt;= 400) {\n        $errorMessage = isset($decodedResponse['message']) \n            ? $decodedResponse['message'] \n            : \"HTTP\u30a8\u30e9\u30fc: $httpCode\";\n        throw new Exception($errorMessage, $httpCode);\n    }\n    \n    return $decodedResponse;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u5916\u90e8API\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u51e6\u7406\ntry {\n    \/\/ API\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\n    $users = apiRequest('https:\/\/api.example.com\/users');\n    \n    \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4f8b\n    $activeUsers = array_filter($users, function($user) {\n        return isset($user['active']) &amp;&amp; $user['active'] === true;\n    });\n    \n    \/\/ \u5e74\u9f62\u3067\u30bd\u30fc\u30c8\n    usort($activeUsers, function($a, $b) {\n        return $a['age'] &lt;=&gt; $b['age'];\n    });\n    \n    \/\/ \u51e6\u7406\u7d50\u679c\u3092\u8868\u793a\n    echo \"\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc: \" . count($activeUsers) . \"\u4eba\\n\";\n    \n    foreach ($activeUsers as $user) {\n        echo \"{$user['name']} ({$user['age']}\u6b73) - {$user['email']}\\n\";\n    }\n    \n    \/\/ \u65b0\u3057\u3044\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\uff08POST\u30ea\u30af\u30a8\u30b9\u30c8\uff09\n    $newUser = [\n        'name' =&gt; '\u5c71\u7530 \u6b21\u90ce',\n        'email' =&gt; 'yamada@example.com',\n        'age' =&gt; 42\n    ];\n    \n    $createdUser = apiRequest('https:\/\/api.example.com\/users', 'POST', $newUser);\n    echo \"\u4f5c\u6210\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc: ID {$createdUser['id']}\\n\";\n    \n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-306\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3057\u3001\u6709\u7528\u306a\u914d\u5217\u69cb\u9020\u306b\u5909\u63db\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-307\">\u57fa\u672c\u7684\u306a\u7d50\u679c\u30bb\u30c3\u30c8\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u53d6\u5f97\n * \n * @return PDO\n *\/\nfunction getDbConnection() {\n    $dsn = 'mysql:host=localhost;dbname=myapp;charset=utf8mb4';\n    $username = 'dbuser';\n    $password = 'dbpass';\n    $options = [\n        PDO::ATTR_ERRMODE =&gt; PDO::ERRMODE_EXCEPTION,\n        PDO::ATTR_DEFAULT_FETCH_MODE =&gt; PDO::FETCH_ASSOC,\n        PDO::ATTR_EMULATE_PREPARES =&gt; false\n    ];\n    \n    return new PDO($dsn, $username, $password, $options);\n}\n\n\/**\n * \u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u7d50\u679c\u3092\u53d6\u5f97\n * \n * @param string $sql SQL\u30af\u30a8\u30ea\n * @param array $params \u30d0\u30a4\u30f3\u30c9\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\n * @return array \u7d50\u679c\u30bb\u30c3\u30c8\n *\/\nfunction fetchAll($sql, $params = []) {\n    $pdo = getDbConnection();\n    $stmt = $pdo-&gt;prepare($sql);\n    $stmt-&gt;execute($params);\n    \n    return $stmt-&gt;fetchAll();\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u3068\u305d\u306e\u6ce8\u6587\u3092\u53d6\u5f97\n$sql = \"SELECT users.id, users.name, users.email, orders.id as order_id, \n               orders.product, orders.amount\n        FROM users\n        LEFT JOIN orders ON users.id = orders.user_id\n        WHERE users.active = 1\n        ORDER BY users.id, orders.id\";\n\n$results = fetchAll($sql);\n\n\/\/ \u7d50\u679c\u3092\u30e6\u30fc\u30b6\u30fc\u3054\u3068\u306b\u30b0\u30eb\u30fc\u30d7\u5316\n$users = [];\n\nforeach ($results as $row) {\n    $userId = $row['id'];\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u307e\u3060\u914d\u5217\u306b\u306a\u3044\u5834\u5408\u306f\u8ffd\u52a0\n    if (!isset($users[$userId])) {\n        $users[$userId] = [\n            'id' =&gt; $userId,\n            'name' =&gt; $row['name'],\n            'email' =&gt; $row['email'],\n            'orders' =&gt; []\n        ];\n    }\n    \n    \/\/ \u6ce8\u6587\u60c5\u5831\u304c\u3042\u308c\u3070\u8ffd\u52a0\n    if (!empty($row['order_id'])) {\n        $users[$userId]['orders'][] = [\n            'id' =&gt; $row['order_id'],\n            'product' =&gt; $row['product'],\n            'amount' =&gt; $row['amount']\n        ];\n    }\n}\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306b\u5909\u63db\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\uff09\n$users = array_values($users);\n\n\/\/ \u7d50\u679c\u3092\u8868\u793a\nforeach ($users as $user) {\n    echo \"{$user['name']} ({$user['email']}):\\n\";\n    \n    if (empty($user['orders'])) {\n        echo \"  \u6ce8\u6587\u306a\u3057\\n\";\n    } else {\n        foreach ($user['orders'] as $order) {\n            echo \"  - {$order['product']}: \u00a5{$order['amount']}\\n\";\n        }\n    }\n    echo \"\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-308\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u96c6\u7d04\u3068\u5909\u63db<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u3092\u30ad\u30fc\u306b\u57fa\u3065\u3044\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\n * \n * @param array $results \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\n * @param string $key \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u5217\u540d\n * @param bool $multipleValues \u540c\u3058\u30ad\u30fc\u306b\u8907\u6570\u306e\u884c\u3092\u8a31\u53ef\u3059\u308b\u304b\n * @return array \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction indexResultsByKey($results, $key, $multipleValues = false) {\n    $indexed = [];\n    \n    foreach ($results as $row) {\n        if (!isset($row[$key])) {\n            continue; \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u884c\u306f\u30b9\u30ad\u30c3\u30d7\n        }\n        \n        $keyValue = $row[$key];\n        \n        if ($multipleValues) {\n            \/\/ \u540c\u3058\u30ad\u30fc\u306b\u8907\u6570\u306e\u884c\u3092\u8a31\u53ef\n            if (!isset($indexed[$keyValue])) {\n                $indexed[$keyValue] = [];\n            }\n            $indexed[$keyValue][] = $row;\n        } else {\n            \/\/ \u540c\u3058\u30ad\u30fc\u306e\u884c\u306f\u4e0a\u66f8\u304d\n            $indexed[$keyValue] = $row;\n        }\n    }\n    \n    return $indexed;\n}\n\n\/**\n * \u4e8c\u6b21\u5143\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u968e\u5c64\u5316\u3055\u308c\u305f\u914d\u5217\u306b\u5909\u63db\n * \n * @param array $rows \u7d50\u679c\u30bb\u30c3\u30c8\n * @param array $config \u968e\u5c64\u5316\u8a2d\u5b9a\n * @return array \u968e\u5c64\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction nestResults($rows, $config) {\n    $nested = [];\n    $parentKey = $config['parentKey'];\n    $childKey = $config['childKey'];\n    $childrenKey = $config['childrenKey'];\n    \n    \/\/ \u7d50\u679c\u3092\u89aa\u30ad\u30fc\u3067\u30b0\u30eb\u30fc\u30d7\u5316\n    $groupedByParent = [];\n    foreach ($rows as $row) {\n        $parentValue = $row[$parentKey];\n        \n        if (!isset($groupedByParent[$parentValue])) {\n            \/\/ \u89aa\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u521d\u671f\u5316\n            $parent = [];\n            foreach ($row as $k =&gt; $v) {\n                \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u9664\u5916\n                if (!isset($config['childFields']) || !in_array($k, $config['childFields'])) {\n                    $parent[$k] = $v;\n                }\n            }\n            $parent[$childrenKey] = [];\n            $groupedByParent[$parentValue] = $parent;\n        }\n        \n        \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3042\u308c\u3070\u8ffd\u52a0\n        if (!empty($row[$childKey])) {\n            $child = [];\n            \n            \/\/ \u5b50\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u62bd\u51fa\n            if (isset($config['childFields'])) {\n                foreach ($config['childFields'] as $field) {\n                    $child[$field] = $row[$field] ?? null;\n                }\n            }\n            \n            $groupedByParent[$parentValue][$childrenKey][] = $child;\n        }\n    }\n    \n    \/\/ \u914d\u5217\u306b\u5909\u63db\n    return array_values($groupedByParent);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u306e\u51e6\u7406\n$sql = \"SELECT \n            d.id as department_id, \n            d.name as department_name,\n            e.id as employee_id,\n            e.name as employee_name,\n            e.job_title,\n            e.salary\n        FROM \n            ## \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u30c7\u30fc\u30bf\u51e6\u7406\n\n\u914d\u5217\u306f\u69d8\u3005\u306a\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u5909\u63db\u3001JSON\u30c7\u30fc\u30bf\u3068\u914d\u5217\u306e\u76f8\u4e92\u5909\u63db\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u306a\u3069\u3001\u5b9f\u52d9\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n### CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u914d\u5217\u5909\u63db\n\nCSV\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u4e00\u822c\u7684\u306a\u5f62\u5f0f\u3067\u3059\u3002PHP\u306b\u306f\u3001CSV\u30c7\u30fc\u30bf\u3092\u6271\u3046\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\n\n#### \u57fa\u672c\u7684\u306aCSV\u8aad\u307f\u8fbc\u307f\n\n```php\n\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u3001\u9023\u60f3\u914d\u5217\u306e\u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\n * \n * @param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return array \u9023\u60f3\u914d\u5217\u306e\u914d\u5217\n *\/\nfunction readCsv($filename, $hasHeader = true) {\n    $data = [];\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'r');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n    $headers = $hasHeader ? fgetcsv($handle) : null;\n    \n    \/\/ \u5404\u884c\u3092\u51e6\u7406\n    while (($row = fgetcsv($handle)) !== false) {\n        if ($headers) {\n            \/\/ \u30d8\u30c3\u30c0\u30fc\u3068\u5024\u3092\u95a2\u9023\u4ed8\u3051\u308b\n            $data[] = array_combine($headers, $row);\n        } else {\n            \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u306a\u3044\u5834\u5408\u306f\u6dfb\u5b57\u914d\u5217\u3068\u3057\u3066\u6271\u3046\n            $data[] = $row;\n        }\n    }\n    \n    fclose($handle);\n    return $data;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    $users = readCsv('users.csv');\n    foreach ($users as $user) {\n        echo \"\u540d\u524d: {$user['name']}, \u30e1\u30fc\u30eb: {$user['email']}\\n\";\n    }\n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-309\">\u5927\u898f\u6a21CSV\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/h4>\n\n\n\n<p>\u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u3068\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3088\u304f\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u3092\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3068\u3057\u3066\u8aad\u307f\u8fbc\u3080\n * \n * @param string $filename CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return Generator \u9023\u60f3\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\n *\/\nfunction readCsvLazy($filename, $hasHeader = true) {\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\n    $handle = fopen($filename, 'r');\n    if ($handle === false) {\n        throw new Exception(\"\u30d5\u30a1\u30a4\u30eb '$filename' \u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f\");\n    }\n    \n    try {\n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u8aad\u307f\u8fbc\u3080\n        $headers = $hasHeader ? fgetcsv($handle) : null;\n        \n        \/\/ \u5404\u884c\u3092\u751f\u6210\n        while (($row = fgetcsv($handle)) !== false) {\n            if ($headers) {\n                \/\/ \u884c\u306e\u5217\u6570\u304c\u30d8\u30c3\u30c0\u30fc\u3068\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u5bfe\u5fdc\n                if (count($row) &lt; count($headers)) {\n                    $row = array_pad($row, count($headers), null);\n                } elseif (count($row) &gt; count($headers)) {\n                    $row = array_slice($row, 0, count($headers));\n                }\n                \n                yield array_combine($headers, $row);\n            } else {\n                yield $row;\n            }\n        }\n    } finally {\n        fclose\n<\/pre>\n\n\n\n<p>echo \u201c\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \u201d . $queue-&gt;size() . \u201c\\n\u201d; \/\/ 3 echo \u201c\u5148\u982d\u8981\u7d20: \u201d . $queue-&gt;front() . \u201c\\n\u201d; \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u53d6\u308a\u51fa\u3057: \u201d . $queue-&gt;dequeue() . \u201c\\n\u201d; \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u53d6\u308a\u51fa\u3057: \u201d . $queue-&gt;dequeue() . \u201c\\n\u201d; \/\/ 2\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \u201d . $queue-&gt;size() . \u201c\\n\u201d; \/\/ 1<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n\u30ad\u30e5\u30fc\u306e `dequeue()` \u64cd\u4f5c\u306f `array_shift()` \u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u8981\u7d20\u6570\u304c\u591a\u3044\u5834\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u6539\u5584\u3059\u308b\u305f\u3081\u306b\u3001SPL\u306eDoubleLinkedList\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u3092\u691c\u8a0e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\n\n#### \u4e21\u7aef\u30ad\u30e5\u30fc\uff08Deque\uff09\u306e\u5b9f\u88c5\n\n\u4e21\u7aef\u30ad\u30e5\u30fc\u306f\u3001\u4e21\u7aef\u304b\u3089\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\u304c\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\n\n```php\n\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u4e21\u7aef\u30ad\u30e5\u30fc\u5b9f\u88c5\n *\/\nclass Deque {\n    private $items = [];\n    \n    \/**\n     * \u5148\u982d\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     *\/\n    public function addFront($item) {\n        array_unshift($this-&gt;items, $item);\n    }\n    \n    \/**\n     * \u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     *\/\n    public function addRear($item) {\n        $this-&gt;items[] = $item;\n    }\n    \n    \/**\n     * \u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u524a\u9664\n     *\/\n    public function removeFront() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items);\n    }\n    \n    \/**\n     * \u672b\u5c3e\u304b\u3089\u8981\u7d20\u3092\u524a\u9664\n     *\/\n    public function removeRear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_pop($this-&gt;items);\n    }\n    \n    \/**\n     * \u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\n     *\/\n    public function front() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u672b\u5c3e\u8981\u7d20\u3092\u53c2\u7167\n     *\/\n    public function rear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    \/**\n     * \u7a7a\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u8981\u7d20\u6570\u3092\u53d6\u5f97\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$deque = new Deque();\n$deque-&gt;addRear(\"Item 1\");\n$deque-&gt;addRear(\"Item 2\");\n$deque-&gt;addFront(\"Item 0\");\n\necho \"\u5148\u982d\u8981\u7d20: \" . $deque-&gt;front() . \"\\n\";      \/\/ Item 0\necho \"\u672b\u5c3e\u8981\u7d20: \" . $deque-&gt;rear() . \"\\n\";       \/\/ Item 2\necho \"\u5148\u982d\u304b\u3089\u524a\u9664: \" . $deque-&gt;removeFront() . \"\\n\"; \/\/ Item 0\necho \"\u672b\u5c3e\u304b\u3089\u524a\u9664: \" . $deque-&gt;removeRear() . \"\\n\";  \/\/ Item 2\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-310\">\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u8df5\u7684\u306a\u5fdc\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5c65\u6b74\u7ba1\u7406\uff08\u30b9\u30bf\u30c3\u30af\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u64cd\u4f5c\u5c65\u6b74\u7ba1\u7406\u30af\u30e9\u30b9\n *\/\nclass History {\n    private $undoStack;\n    private $redoStack;\n    private $maxHistory;\n    \n    public function __construct($maxHistory = 20) {\n        $this-&gt;undoStack = new EfficientStack();\n        $this-&gt;redoStack = new EfficientStack();\n        $this-&gt;maxHistory = $maxHistory;\n    }\n    \n    \/**\n     * \u65b0\u3057\u3044\u64cd\u4f5c\u3092\u5c65\u6b74\u306b\u8ffd\u52a0\n     *\/\n    public function addAction($action) {\n        $this-&gt;undoStack-&gt;push($action);\n        \n        \/\/ \u5c65\u6b74\u306e\u4e0a\u9650\u3092\u7ba1\u7406\n        while ($this-&gt;undoStack-&gt;size() &gt; $this-&gt;maxHistory) {\n            $this-&gt;undoStack-&gt;pop();\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u64cd\u4f5c\u304c\u8ffd\u52a0\u3055\u308c\u305f\u306e\u3067Redo\u5c65\u6b74\u306f\u30af\u30ea\u30a2\n        $this-&gt;redoStack-&gt;clear();\n    }\n    \n    \/**\n     * \u76f4\u524d\u306e\u64cd\u4f5c\u3092\u53d6\u308a\u6d88\u3057\n     *\/\n    public function undo() {\n        if ($this-&gt;undoStack-&gt;isEmpty()) {\n            return null;\n        }\n        \n        $action = $this-&gt;undoStack-&gt;pop();\n        $this-&gt;redoStack-&gt;push($action);\n        return $action;\n    }\n    \n    \/**\n     * \u53d6\u308a\u6d88\u3057\u305f\u64cd\u4f5c\u3092\u3084\u308a\u76f4\u3057\n     *\/\n    public function redo() {\n        if ($this-&gt;redoStack-&gt;isEmpty()) {\n            return null;\n        }\n        \n        $action = $this-&gt;redoStack-&gt;pop();\n        $this-&gt;undoStack-&gt;push($action);\n        return $action;\n    }\n    \n    \/**\n     * \u5b9f\u884c\u53ef\u80fd\u306a\u53d6\u308a\u6d88\u3057\u64cd\u4f5c\u304c\u3042\u308b\u304b\n     *\/\n    public function canUndo() {\n        return !$this-&gt;undoStack-&gt;isEmpty();\n    }\n    \n    \/**\n     * \u5b9f\u884c\u53ef\u80fd\u306a\u3084\u308a\u76f4\u3057\u64cd\u4f5c\u304c\u3042\u308b\u304b\n     *\/\n    public function canRedo() {\n        return !$this-&gt;redoStack-&gt;isEmpty();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$history = new History();\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u5165\u529b: Hello\");\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\");\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u524a\u9664: World\");\n\necho \"\u53d6\u308a\u6d88\u3057: \" . $history-&gt;undo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u524a\u9664: World\necho \"\u53d6\u308a\u6d88\u3057: \" . $history-&gt;undo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\necho \"\u3084\u308a\u76f4\u3057: \" . $history-&gt;redo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5e45\u512a\u5148\u63a2\u7d22\uff08\u30ad\u30e5\u30fc\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u8ff7\u8def\u306e\u6700\u77ed\u7d4c\u8def\u3092\u5e45\u512a\u5148\u63a2\u7d22\u3067\u89e3\u304f\n * \n * @param array $maze \u8ff7\u8def\u30c7\u30fc\u30bf\uff082\u6b21\u5143\u914d\u5217\uff09\n * @param array $start \u958b\u59cb\u4f4d\u7f6e [\u884c, \u5217]\n * @param array $goal \u76ee\u6a19\u4f4d\u7f6e [\u884c, \u5217]\n * @return array|null \u6700\u77ed\u7d4c\u8def\u307e\u305f\u306f\u5230\u9054\u4e0d\u80fd\u306e\u5834\u5408null\n *\/\nfunction solveMaze($maze, $start, $goal) {\n    $rows = count($maze);\n    $cols = count($maze[0]);\n    \n    \/\/ \u8a2a\u554f\u6e08\u307f\u30bb\u30eb\u3092\u8ffd\u8de1\n    $visited = [];\n    for ($i = 0; $i &lt; $rows; $i++) {\n        $visited[$i] = array_fill(0, $cols, false);\n    }\n    \n    \/\/ \u63a2\u7d22\u30ad\u30e5\u30fc\u3092\u521d\u671f\u5316\n    $queue = new Queue();\n    $queue-&gt;enqueue([$start, []]); \/\/ [\u73fe\u5728\u4f4d\u7f6e, \u3053\u3053\u307e\u3067\u306e\u7d4c\u8def]\n    $visited[$start[0]][$start[1]] = true;\n    \n    \/\/ \u79fb\u52d5\u65b9\u5411\uff08\u4e0a\u3001\u53f3\u3001\u4e0b\u3001\u5de6\uff09\n    $directions = [[-1, 0], [0, 1], [1, 0], [0, -1]];\n    $dirNames = ['\u4e0a', '\u53f3', '\u4e0b', '\u5de6'];\n    \n    while (!$queue-&gt;isEmpty()) {\n        [$current, $path] = $queue-&gt;dequeue();\n        [$r, $c] = $current;\n        \n        \/\/ \u76ee\u6a19\u306b\u5230\u9054\u3057\u305f\u304b\u78ba\u8a8d\n        if ($r === $goal[0] &amp;&amp; $c === $goal[1]) {\n            return $path; \/\/ \u6700\u77ed\u7d4c\u8def\u3092\u8fd4\u3059\n        }\n        \n        \/\/ \u56db\u65b9\u5411\u3092\u63a2\u7d22\n        for ($i = 0; $i &lt; 4; $i++) {\n            $newR = $r + $directions[$i][0];\n            $newC = $c + $directions[$i][1];\n            \n            \/\/ \u8ff7\u8def\u306e\u7bc4\u56f2\u5185\u304b\u78ba\u8a8d\n            if ($newR &gt;= 0 &amp;&amp; $newR &lt; $rows &amp;&amp; $newC &gt;= 0 &amp;&amp; $newC &lt; $cols) {\n                \/\/ \u901a\u884c\u53ef\u80fd\u304b\u3064\u672a\u8a2a\u554f\u306a\u3089\u51e6\u7406\n                if ($maze[$newR][$newC] === 0 &amp;&amp; !$visited[$newR][$newC]) {\n                    $visited[$newR][$newC] = true;\n                    $newPath = $path;\n                    $newPath[] = $dirNames[$i];\n                    $queue-&gt;enqueue([[$newR, $newC], $newPath]);\n                }\n            }\n        }\n    }\n    \n    return null; \/\/ \u7d4c\u8def\u304c\u898b\u3064\u304b\u3089\u306a\u3044\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u8ff7\u8def\u306e\u63a2\u7d22\n$maze = [\n    [0, 1, 0, 0, 0],\n    [0, 1, 0, 1, 0],\n    [0, 0, 0, 1, 0],\n    [1, 1, 0, 1, 0],\n    [0, 0, 0, 0, 0]\n];\n\n$start = [0, 0]; \/\/ \u5de6\u4e0a\n$goal = [4, 4];  \/\/ \u53f3\u4e0b\n\n$path = solveMaze($maze, $start, $goal);\n\nif ($path) {\n    echo \"\u6700\u77ed\u7d4c\u8def: \" . implode(\" \u2192 \", $path) . \"\\n\";\n} else {\n    echo \"\u7d4c\u8def\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-311\">\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u8a08\u7b97\u30b3\u30b9\u30c8\u306e\u9ad8\u3044\u64cd\u4f5c\u306e\u7d50\u679c\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-312\">\u57fa\u672c\u7684\u306a\u30a4\u30f3\u30e1\u30e2\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30a4\u30f3\u30e1\u30e2\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n *\/\nclass SimpleCache {\n    private $cache = [];\n    private $expirations = [];\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $value \u4fdd\u5b58\u3059\u308b\u5024\n     * @param int $ttl \u6709\u52b9\u671f\u9593\uff08\u79d2\uff09\u30010\u306f\u7121\u671f\u9650\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function set($key, $value, $ttl = 0) {\n        $this-&gt;cache[$key] = $value;\n        \n        if ($ttl &gt; 0) {\n            $this-&gt;expirations[$key] = time() + $ttl;\n        } else {\n            unset($this-&gt;expirations[$key]);\n        }\n        \n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $default \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     * @return mixed \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     *\/\n    public function get($key, $default = null) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!$this-&gt;has($key)) {\n            return $default;\n        }\n        \n        return $this-&gt;cache[$key];\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u6709\u52b9\u671f\u9650\u5185\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u6709\u52b9\u671f\u9650\u5185\u306a\u3089true\n     *\/\n    public function has($key) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!isset($this-&gt;cache[$key])) {\n            return false;\n        }\n        \n        \/\/ \u6709\u52b9\u671f\u9650\u3092\u30c1\u30a7\u30c3\u30af\n        if (isset($this-&gt;expirations[$key]) &amp;&amp; $this-&gt;expirations[$key] &lt; time()) {\n            \/\/ \u671f\u9650\u5207\u308c\u306a\u306e\u3067\u524a\u9664\n            $this-&gt;delete($key);\n            return false;\n        }\n        \n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function delete($key) {\n        unset($this-&gt;cache[$key]);\n        unset($this-&gt;expirations[$key]);\n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5168\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function clear() {\n        $this-&gt;cache = [];\n        $this-&gt;expirations = [];\n        return true;\n    }\n    \n    \/**\n     * \u671f\u9650\u5207\u308c\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n     * \n     * @return int \u524a\u9664\u3055\u308c\u305f\u9805\u76ee\u6570\n     *\/\n    public function cleanup() {\n        $now = time();\n        $count = 0;\n        \n        foreach ($this-&gt;expirations as $key =&gt; $expiration) {\n            if ($expiration &lt; $now) {\n                $this-&gt;delete($key);\n                $count++;\n            }\n        }\n        \n        return $count;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$cache = new SimpleCache();\n\n\/\/ \u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\uff0860\u79d2\u9593\uff09\n$cache-&gt;set('user_123', ['id' =&gt; 123, 'name' =&gt; 'John Doe'], 60);\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\nif ($cache-&gt;has('user_123')) {\n    $user = $cache-&gt;get('user_123');\n    echo \"\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97: \u30e6\u30fc\u30b6\u30fc\u540d {$user['name']}\\n\";\n} else {\n    echo \"\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\\n\";\n}\n\n\/\/ \u671f\u9650\u5207\u308c\u3092\u610f\u56f3\u7684\u306b\u4f5c\u6210\n$cache-&gt;set('temp_data', '\u3059\u3050\u306b\u671f\u9650\u5207\u308c', 1);\nsleep(2);\n\n\/\/ \u671f\u9650\u5207\u308c\u306e\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9\nif ($cache-&gt;has('temp_data')) {\n    echo \"\u30c7\u30fc\u30bf\u306f\u307e\u3060\u6709\u52b9\u3067\u3059\\n\";\n} else {\n    echo \"\u30c7\u30fc\u30bf\u306f\u671f\u9650\u5207\u308c\u3067\u3059\\n\"; \/\/ \u3053\u308c\u304c\u8868\u793a\u3055\u308c\u308b\n}\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n$cleanedCount = $cache-&gt;cleanup();\necho \"\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7: {$cleanedCount}\u4ef6\u306e\u671f\u9650\u5207\u308c\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3057\u307e\u3057\u305f\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-313\">LRU\uff08Least Recently Used\uff09\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n<p>LRU\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u6700\u3082\u9577\u3044\u9593\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u9805\u76ee\u304c\u65b0\u3057\u3044\u9805\u76ee\u306e\u305f\u3081\u306b\u524a\u9664\u3055\u308c\u308b\u6226\u7565\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * LRU\uff08Least Recently Used\uff09\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n *\/\nclass LRUCache {\n    private $capacity;\n    private $cache = [];\n    private $usage = [];\n    \n    \/**\n     * \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n     * \n     * @param int $capacity \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6700\u5927\u5bb9\u91cf\n     *\/\n    public function __construct($capacity) {\n        $this-&gt;capacity = max(1, (int)$capacity);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $value \u4fdd\u5b58\u3059\u308b\u5024\n     * @return mixed \u4fdd\u5b58\u3055\u308c\u305f\u5024\n     *\/\n    public function put($key, $value) {\n        \/\/ \u30ad\u30fc\u304c\u3059\u3067\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u66f4\u65b0\n        if (isset($this-&gt;cache[$key])) {\n            $this-&gt;cache[$key] = $value;\n            $this-&gt;touch($key);\n            return $value;\n        }\n        \n        \/\/ \u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u3092\u8d85\u3048\u308b\u5834\u5408\u306f\u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n        if (count($this-&gt;cache) &gt;= $this-&gt;capacity) {\n            $this-&gt;evict();\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n        $this-&gt;cache[$key] = $value;\n        $this-&gt;touch($key);\n        \n        return $value;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $default \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     * @return mixed \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     *\/\n    public function get($key, $default = null) {\n        if (!isset($this-&gt;cache[$key])) {\n            return $default;\n        }\n        \n        \/\/ \u30a2\u30af\u30bb\u30b9\u6642\u9593\u3092\u66f4\u65b0\n        $this-&gt;touch($key);\n        \n        return $this-&gt;cache[$key];\n    }\n    \n    \/**\n     * \u30ad\u30fc\u306e\u4f7f\u7528\u6642\u9593\u3092\u66f4\u65b0\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     *\/\n    private function touch($key) {\n        \/\/ \u65e2\u5b58\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\n        if (isset($this-&gt;usage[$key])) {\n            unset($this-&gt;usage[$key]);\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u4f7f\u7528\u6642\u9593\u3092\u8a2d\u5b9a\n        $this-&gt;usage[$key] = microtime(true);\n    }\n    \n    \/**\n     * \u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n     *\/\n    private function evict() {\n        if (empty($this-&gt;usage)) {\n            return;\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30ad\u30fc\u3092\u691c\u7d22\n        $oldestKey = null;\n        $oldestTime = PHP_FLOAT_MAX;\n        \n        foreach ($this-&gt;usage as $key =&gt; $time) {\n            if ($time &lt; $oldestTime) {\n                $oldestTime = $time;\n                $oldestKey = $key;\n            }\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n        if ($oldestKey !== null) {\n            unset($this-&gt;cache[$oldestKey]);\n            unset($this-&gt;usage[$oldestKey]);\n        }\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u5185\u306e\u30a2\u30a4\u30c6\u30e0\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u30a2\u30a4\u30c6\u30e0\u6570\n     *\/\n    public function count() {\n        return count($this-&gt;cache);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308c\u3070true\n     *\/\n    public function has($key) {\n        return isset($this-&gt;cache[$key]);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function delete($key) {\n        if (isset($this-&gt;cache[$key])) {\n            unset($this-&gt;cache[$key]);\n            unset($this-&gt;usage[$key]);\n            return true;\n        }\n        \n        return false;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5168\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     *\/\n    public function clear() {\n        $this-&gt;cache = [];\n        $this-&gt;usage = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$cache = new LRUCache(3); \/\/ \u6700\u59273\u30a2\u30a4\u30c6\u30e0\u307e\u3067\u4fdd\u6301\n\n$cache-&gt;put('key1', 'Value 1');\n$cache-&gt;put('key2', 'Value 2');\n$cache-&gt;put('key3', 'Value 3');\n\necho \"\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba: \" . $cache-&gt;count() . \"\\n\";  \/\/ 3\n\n\/\/ key1\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u6700\u65b0\u306e\u4f7f\u7528\u72b6\u614b\u306b\u66f4\u65b0\n$cache-&gt;get('key1');\n\n\/\/ \u5bb9\u91cf\u3092\u8d85\u3048\u308b\u65b0\u3057\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n$cache-&gt;put('key4', 'Value 4');\n\n\/\/ key2\u304c\u524a\u9664\u3055\u308c\u3066\u3044\u308b\uff08\u6700\u3082\u9577\u304f\u4f7f\u308f\u308c\u3066\u3044\u306a\u3044\u305f\u3081\uff09\necho \"key1 exists: \" . ($cache-&gt;has('key1') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\necho \"key2 exists: \" . ($cache-&gt;has('key2') ? 'Yes' : 'No') . \"\\n\"; \/\/ No - \u524a\u9664\u3055\u308c\u305f\necho \"key3 exists: \" . ($cache-&gt;has('key3') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\necho \"key4 exists: \" . ($cache-&gt;has('key4') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-314\">\u8a08\u7b97\u7d50\u679c\u306e\u30e1\u30e2\u5316\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u7528\u4f8b\uff09<\/h4>\n\n\n\n<p>\u8a08\u7b97\u30b3\u30b9\u30c8\u306e\u9ad8\u3044\u95a2\u6570\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u4f8b\u3067\u3059\u3002\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u8a08\u7b97\u306a\u3069\u306e\u518d\u5e30\u7684\u306a\u95a2\u6570\u3067\u7279\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u8a08\u7b97\u7d50\u679c\u3092\u30e1\u30e2\u5316\u3059\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30b3\u30ec\u30fc\u30bf\n * \n * @param callable $func \u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u95a2\u6570\n * @return callable \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u884c\u3046\u65b0\u3057\u3044\u95a2\u6570\n *\/\nfunction memoize(callable $func) {\n    $cache = [];\n    \n    return function() use ($func, &amp;$cache) {\n        $args = func_get_args();\n        $key = md5(serialize($args));\n        \n        if (!isset($cache[$key])) {\n            $cache[$key] = call_user_func_array($func, $args);\n        }\n        \n        return $cache[$key];\n    };\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u8a08\u7b97\n\n\/\/ \u30e1\u30e2\u5316\u306a\u3057\u306e\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u95a2\u6570\uff08\u975e\u52b9\u7387\uff09\nfunction fibonacci($n) {\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    return fibonacci($n - 1) + fibonacci($n - 2);\n}\n\n\/\/ \u30e1\u30e2\u5316\u3092\u4f7f\u3063\u305f\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u95a2\u6570\n$memoizedFib = memoize(function($n) use (&amp;$memoizedFib) {\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    return $memoizedFib($n - 1) + $memoizedFib($n - 2);\n});\n\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\n$n = 30;\n\n$start = microtime(true);\n$result1 = fibonacci($n);\n$time1 = microtime(true) - $start;\necho \"\u30e1\u30e2\u5316\u306a\u3057: fibonacci({$n}) = {$result1}, \u6642\u9593: {$time1}\u79d2\\n\";\n\n$start = microtime(true);\n$result2 = $memoizedFib($n);\n$time2 = microtime(true) - $start;\necho \"\u30e1\u30e2\u5316\u3042\u308a: fibonacci({$n}) = {$result2}, \u6642\u9593: {$time2}\u79d2\\n\";\necho \"\u9ad8\u901f\u5316\u7387: \" . number_format($time1 \/ $time2, 1) . \"\u500d\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-315\">\u914d\u5217\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n<p>\u73fe\u4ee3\u306eWeb\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001URL\u8981\u6c42\u3092\u9069\u5207\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3084\u30a2\u30af\u30b7\u30e7\u30f3\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u3066\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u304c\u3089\u6a5f\u80fd\u7684\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\n *\/\nclass Router {\n    private $routes = [];\n    private $notFoundHandler;\n    \n    \/**\n     * \u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     * \n     * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n     * @param string $path URL\u30d1\u30b9\n     * @param callable $handler \u51e6\u7406\u3092\u884c\u3046\u30cf\u30f3\u30c9\u30e9\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function addRoute($method, $path, $handler) {\n        $method = strtoupper($method);\n        $this-&gt;routes[$method][$path] = [\n            'handler' =&gt; $handler,\n            'params' =&gt; $this-&gt;extractParams($path)\n        ];\n        return $this;\n    }\n    \n    \/**\n     * GET\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function get($path, $handler) {\n        return $this-&gt;addRoute('GET', $path, $handler);\n    }\n    \n    \/**\n     * POST\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function post($path, $handler) {\n        return $this-&gt;addRoute('POST', $path, $handler);\n    }\n    \n    \/**\n     * PUT\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function put($path, $handler) {\n        return $this-&gt;addRoute('PUT', $path, $handler);\n    }\n    \n    \/**\n     * DELETE\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function delete($path, $handler) {\n        return $this-&gt;addRoute('DELETE', $path, $handler);\n    }\n    \n    \/**\n     * 404 Not Found\u30cf\u30f3\u30c9\u30e9\u3092\u8a2d\u5b9a\n     * \n     * @param callable $handler 404\u30cf\u30f3\u30c9\u30e9\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function setNotFoundHandler($handler) {\n        $this-&gt;notFoundHandler = $handler;\n        return $this;\n    }\n    \n    \/**\n     * \u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\n     * \n     * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n     * @param string $path \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return mixed \u30cf\u30f3\u30c9\u30e9\u306e\u623b\u308a\u5024\n     *\/\n    public function dispatch($method, $path) {\n        $method = strtoupper($method);\n        \n        \/\/ HTTP\u30e1\u30bd\u30c3\u30c9\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!isset($this-&gt;routes[$method])) {\n            return $this-&gt;handleNotFound($path);\n        }\n        \n        \/\/ \u5b8c\u5168\u4e00\u81f4\u3059\u308b\u30eb\u30fc\u30c8\u3092\u691c\u7d22\n        if (isset($this-&gt;routes[$method][$path])) {\n            $route = $this-&gt;routes[$method][$path];\n            return call_user_func($route['handler']);\n        }\n        \n        \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u30eb\u30fc\u30c8\u3092\u691c\u7d22\n        foreach ($this-&gt;routes[$method] as $routePath =&gt; $route) {\n            $params = $this-&gt;matchRoute($routePath, $path);\n            if ($params !== null) {\n                \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30cf\u30f3\u30c9\u30e9\u306b\u6e21\u3059\n                return call_user_func_array($route['handler'], $params);\n            }\n        }\n        \n        \/\/ \u30eb\u30fc\u30c8\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\n        return $this-&gt;handleNotFound($path);\n    }\n    \n    \/**\n     * \u30d1\u30b9\u304b\u3089\u30d1\u30e9\u30e1\u30fc\u30bf\u90e8\u5206\u3092\u62bd\u51fa\n     * \n     * @param string $path \u30d1\u30b9\u30d1\u30bf\u30fc\u30f3\n     * @return array \u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u914d\u5217\n     *\/\n    private function extractParams($path) {\n        $params = [];\n        $parts = explode('\/', trim($path, '\/'));\n        \n        foreach ($parts as $part) {\n            if (strpos($part, ':') === 0) {\n                $params[] = substr($part, 1);\n            }\n        }\n        \n        return $params;\n    }\n    \n    \/**\n     * \u30d1\u30b9\u304c\u30eb\u30fc\u30c8\u30d1\u30bf\u30fc\u30f3\u3068\u30de\u30c3\u30c1\u3059\u308b\u304b\u78ba\u8a8d\n     * \n     * @param string $routePath \u30eb\u30fc\u30c8\u30d1\u30bf\u30fc\u30f3\n     * @param string $requestPath \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return array|null \u30de\u30c3\u30c1\u3057\u305f\u5834\u5408\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u5024\u306e\u914d\u5217\u3001\u3057\u306a\u3044\u5834\u5408\u306fnull\n     *\/\n    private function matchRoute($routePath, $requestPath) {\n        $routeParts = explode('\/', trim($routePath, '\/'));\n        $requestParts = explode('\/', trim($requestPath, '\/'));\n        \n        if (count($routeParts) !== count($requestParts)) {\n            return null;\n        }\n        \n        $params = [];\n        \n        for ($i = 0; $i &lt; count($routeParts); $i++) {\n            $routePart = $routeParts[$i];\n            $requestPart = $requestParts[$i];\n            \n            \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u90e8\u5206\n            if (strpos($routePart, ':') === 0) {\n                $params[] = $requestPart;\n                continue;\n            }\n            \n            \/\/ \u56fa\u5b9a\u90e8\u5206\u304c\u4e00\u81f4\u3057\u306a\u3044\n            if ($routePart !== $requestPart) {\n                return null;\n            }\n        }\n        \n        return $params;\n    }\n    \n    \/**\n     * Not Found\u30cf\u30f3\u30c9\u30e9\u3092\u5b9f\u884c\n     * \n     * @param string $path \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return mixed \u30cf\u30f3\u30c9\u30e9\u306e\u623b\u308a\u5024\n     *\/\n    private function handleNotFound($path) {\n        if (is_callable($this-&gt;notFoundHandler)) {\n            return call_user_func($this-&gt;notFoundHandler, $path);\n        }\n        \n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e404\u30ec\u30b9\u30dd\u30f3\u30b9\n        header('HTTP\/1.0 404 Not Found');\n        return \"404 Not Found: {$path}\";\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$router = new Router();\n\n\/\/ \u30eb\u30fc\u30c8\u306e\u5b9a\u7fa9\n$router-&gt;get('\/', function() {\n    return \"\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;get('\/about', function() {\n    return \"\u4f1a\u793e\u6982\u8981\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;get('\/users\/:id', function($id) {\n    return \"\u30e6\u30fc\u30b6\u30fcID: {$id} \u306e\u8a73\u7d30\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;post('\/users', function() {\n    return \"\u65b0\u3057\u3044\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\";\n});\n\n$router-&gt;get('\/products\/:category\/:id', function($category, $id) {\n    return \"\u30ab\u30c6\u30b4\u30ea\u30fc: {$category}, \u5546\u54c1ID: {$id} \u306e\u5546\u54c1\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n\/\/ 404\u30cf\u30f3\u30c9\u30e9\u306e\u8a2d\u5b9a\n$router-&gt;setNotFoundHandler(function($path) {\n    return \"\u30da\u30fc\u30b8\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: {$path}\";\n});\n\n\/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u306e\u51e6\u7406\n$method = $_SERVER['REQUEST_METHOD'];\n$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);\n\n\/\/ \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u5b9f\u884c\n$response = $router-&gt;dispatch($method, $path);\necho $response;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-316\">\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u306e\u30eb\u30fc\u30bf\u30fc\u306e\u62e1\u5f35<\/h4>\n\n\n\n<p>\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u8a8d\u8a3c\u3084\u30ed\u30ae\u30f3\u30b0\u306a\u3069\u306e\u6a2a\u65ad\u7684\u95a2\u5fc3\u4e8b\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u7d71\u5408\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\n *\/\nclass MiddlewareRouter extends Router {\n    private $middlewares = [];\n    \n    \/**\n     * \u30b0\u30ed\u30fc\u30d0\u30eb\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3092\u8ffd\u52a0\n     * \n     * @param callable $middleware \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u95a2\u6570\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function use($middleware## \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\n\n\u914d\u5217\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u57fa\u76e4\u3068\u3057\u3066\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\u3001\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u3001\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n### \u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\n\n\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30b9\u306e\u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u3066\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\n\n#### \u30b9\u30bf\u30c3\u30af\uff08LIFO: Last-In-First-Out\uff09\u306e\u5b9f\u88c5\n\n\u30b9\u30bf\u30c3\u30af\u306f\u300c\u5f8c\u5165\u308c\u5148\u51fa\u3057\u300d\u306e\u539f\u5247\u306b\u5f93\u3046\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002PHP\u306e\u914d\u5217\u95a2\u6570\u3092\u4f7f\u3063\u3066\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\n\n```php\n\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u5b9f\u88c5\n *\/\nclass Stack {\n    private $items = [];\n    \n    \/**\n     * \u8981\u7d20\u3092\u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u306b\u8ffd\u52a0\n     * \n     * @param mixed $item \u8ffd\u52a0\u3059\u308b\u8981\u7d20\n     * @return void\n     *\/\n    public function push($item) {\n        array_unshift($this-&gt;items, $item);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\n     * \n     * @return mixed \u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3001\u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function pop() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\uff08\u53d6\u308a\u51fa\u3055\u306a\u3044\uff09\n     * \n     * @return mixed \u5148\u982d\u8981\u7d20\u3001\u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function peek() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @return bool \u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408true\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u5185\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u8981\u7d20\u6570\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u3092\u7a7a\u306b\u3059\u308b\n     * \n     * @return void\n     *\/\n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$stack = new Stack();\n$stack-&gt;push(\"\u6700\u521d\u306e\u8981\u7d20\");\n$stack-&gt;push(\"2\u756a\u76ee\u306e\u8981\u7d20\");\n$stack-&gt;push(\"3\u756a\u76ee\u306e\u8981\u7d20\");\n\necho \"\u30b9\u30bf\u30c3\u30af\u30b5\u30a4\u30ba: \" . $stack-&gt;size() . \"\\n\";  \/\/ 3\necho \"\u5148\u982d\u8981\u7d20: \" . $stack-&gt;peek() . \"\\n\";       \/\/ 3\u756a\u76ee\u306e\u8981\u7d20\necho \"\u53d6\u308a\u51fa\u3057: \" . $stack-&gt;pop() . \"\\n\";        \/\/ 3\u756a\u76ee\u306e\u8981\u7d20\necho \"\u53d6\u308a\u51fa\u3057: \" . $stack-&gt;pop() . \"\\n\";        \/\/ 2\u756a\u76ee\u306e\u8981\u7d20\necho \"\u30b9\u30bf\u30c3\u30af\u30b5\u30a4\u30ba: \" . $stack-&gt;size() . \"\\n\";  \/\/ 1\n<\/pre>\n\n\n\n<p>\u3082\u3063\u3068\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u3068\u3057\u3066\u3001\u672b\u5c3e\u3067\u306e\u64cd\u4f5c\u3092\u5229\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u3088\u308a\u52b9\u7387\u7684\u306a\u30b9\u30bf\u30c3\u30af\u5b9f\u88c5\uff08\u672b\u5c3e\u64cd\u4f5c\u7248\uff09\n *\/\nclass EfficientStack {\n    private $items = [];\n    \n    public function push($item) {\n        $this-&gt;items[] = $item; \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0 - O(1)\n    }\n    \n    public function pop() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_pop($this-&gt;items); \/\/ \u672b\u5c3e\u304b\u3089\u524a\u9664 - O(1)\n    }\n    \n    public function peek() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6700\u9069\u5316\u7248\u3067\u306f\u3001<code>array_push()<\/code>\/<code>array_pop()<\/code>\u3092\u4f7f\u7528\uff08\u307e\u305f\u306f<code>$array[] = $value<\/code>\u3068<code>array_pop()<\/code>\uff09\u3057\u3066\u304a\u308a\u3001\u5148\u982d\u3067\u306e\u64cd\u4f5c\uff08<code>array_unshift()<\/code>\/<code>array_shift()<\/code>\uff09\u3088\u308a\u3082\u52b9\u7387\u7684\u3067\u3059\u3002\u5148\u982d\u3067\u306e\u64cd\u4f5c\u306f\u3001\u914d\u5217\u5168\u4f53\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u518d\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081O(n)\u306e\u6642\u9593\u8907\u96d1\u5ea6\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-317\">\u30ad\u30e5\u30fc\uff08FIFO: First-In-First-Out\uff09\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<p>\u30ad\u30e5\u30fc\u306f\u300c\u5148\u5165\u308c\u5148\u51fa\u3057\u300d\u306e\u539f\u5247\u306b\u5f93\u3046\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u30ad\u30e5\u30fc\u5b9f\u88c5\n *\/\nclass Queue {\n    private $items = [];\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     * \n     * @param mixed $item \u8ffd\u52a0\u3059\u308b\u8981\u7d20\n     * @return void\n     *\/\n    public function enqueue($item) {\n        $this-&gt;items[] = $item; \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0 - O(1)\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\n     * \n     * @return mixed \u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function dequeue() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items); \/\/ \u5148\u982d\u304b\u3089\u524a\u9664 - O(n)\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\uff08\u53d6\u308a\u51fa\u3055\u306a\u3044\uff09\n     * \n     * @return mixed \u5148\u982d\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function front() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u672b\u5c3e\u8981\u7d20\u3092\u53c2\u7167\n     * \n     * @return mixed \u672b\u5c3e\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function rear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @return bool \u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408true\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u5185\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u8981\u7d20\u6570\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u3092\u7a7a\u306b\u3059\u308b\n     * \n     * @return void\n     *\/\n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$queue = new Queue();\n$queue-&gt;enqueue(\"\u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc\");\n$queue-&gt;enqueue(\"2\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc\");\n$queue-&gt;enqueue(\"3\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc\");\n\necho \"\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \" . $queue-&gt;size() . \"\\n\";   \/\/ 3\necho \"\u5148\u982d\u8981\u7d20: \" . $queue-&gt;front() . \"\\n\";      \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\n<\/pre>\n\n\n\n<p>\/**<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0 *\/ class MiddlewareRouter extends Router { private $middlewares = []; \/**<ul><li>\u30b0\u30ed\u30fc\u30d0\u30eb\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3092\u8ffd\u52a0<\/li><li>@param callable $middleware \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u95a2\u6570<\/li><li>@return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528 *\/ public function use($middleware) { $this-&gt;middlewares[] = $middleware; return $this; }<\/li><\/ul>\/**\n<ul class=\"wp-block-list\">\n<li>\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3092\u9069\u7528\u3057\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406<\/li>\n\n\n\n<li>@param string $method HTTP\u30e1\u30bd\u30c3\u30c9<\/li>\n\n\n\n<li>@param string $path \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9<\/li>\n\n\n\n<li>@return mixed \u51e6\u7406\u7d50\u679c *\/ public function dispatch($method, $path) { \/\/ \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u30c1\u30a7\u30fc\u30f3\u3092\u69cb\u7bc9 $next = function() use ($method, $path) { return parent::dispatch($method, $path); }; \/\/ \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3092\u9006\u9806\u306b\u9069\u7528 $chain = array_reduce( array_reverse($this-&gt;middlewares), function($next, $middleware) use ($method, $path) { return function() use ($next, $middleware, $method, $path) { return $middleware($method, $path, $next); }; }, $next ); \/\/ \u30c1\u30a7\u30fc\u30f3\u3092\u5b9f\u884c return $chain(); } }<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\/\/ \u4f7f\u7528\u4f8b\uff1a\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u30eb\u30fc\u30bf\u30fc<\/p>\n\n\n\n<p>\/\/ \u30ed\u30ae\u30f3\u30b0\u30df\u30c9\u30eb\u30a6\u30a7\u30a2 $loggingMiddleware = function($method, $path, $next) { $start = microtime(true); $result = $next(); $time = microtime(true) \u2013 $start;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">error_log(\"Request: {$method} {$path} - Time: {$time}s\");\nreturn $result;\n<\/pre>\n\n\n\n<p>};<\/p>\n\n\n\n<p>\/\/ \u8a8d\u8a3c\u30df\u30c9\u30eb\u30a6\u30a7\u30a2 $authMiddleware = function($method, $path, $next) { \/\/ \u8a8d\u8a3c\u304c\u5fc5\u8981\u306a\u30d1\u30b9\u304b\u30c1\u30a7\u30c3\u30af if (strpos($path, \u2018\/admin\u2019) === 0) { \/\/ \u3053\u3053\u3067\u5b9f\u969b\u306e\u8a8d\u8a3c\u51e6\u7406\u3092\u884c\u3046 $isAuthenticated = isset($_SESSION[\u2018user\u2019]) &amp;&amp; $_SESSION[\u2018user\u2019][\u2018is_admin\u2019];<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    if (!$isAuthenticated) {\n        header('HTTP\/1.0 403 Forbidden');\n        return \"\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u304c\u3042\u308a\u307e\u305b\u3093\";\n    }\n}\n\nreturn $next();\n<\/pre>\n\n\n\n<p>};<\/p>\n\n\n\n<p>\/\/ \u30eb\u30fc\u30bf\u30fc\u306e\u69cb\u7bc9 $router = new MiddlewareRouter();<\/p>\n\n\n\n<p>\/\/ \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u306e\u9069\u7528 $router-&gt;use($loggingMiddleware); $router-&gt;use($authMiddleware);<\/p>\n\n\n\n<p>\/\/ \u30eb\u30fc\u30c8\u306e\u5b9a\u7fa9 $router-&gt;get(\u2018\/\u2019, function() { return \u201c\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u3067\u3059\u201d; });<\/p>\n\n\n\n<p>$router-&gt;get(\u2018\/admin\/dashboard\u2019, function() { return \u201c\u7ba1\u7406\u8005\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u201d; });<\/p>\n\n\n\n<p>\/\/ \u52d5\u4f5c\u78ba\u8a8d $response = $router-&gt;dispatch(\u2018GET\u2019, \u2018\/\u2019); echo $response . \u201c\\n\u201d;<\/p>\n\n\n\n<p>$response = $router-&gt;dispatch(\u2018GET\u2019, \u2018\/admin\/dashboard\u2019); echo $response . \u201c\\n\u201d;<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n\u3053\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u304c\u3089\u3082\u30e2\u30c0\u30f3\u306aWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u6838\u3068\u306a\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001\u3082\u3063\u3068\u8907\u96d1\u306a\u30d1\u30b9\u30de\u30c3\u30c1\u30f3\u30b0\u3001HTTP\u30e1\u30bd\u30c3\u30c9\u306e\u81ea\u52d5\u691c\u51fa\u3001\u30ea\u30af\u30a8\u30b9\u30c8\/\u30ec\u30b9\u30dd\u30f3\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u51e6\u7406\u306a\u3069\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u304c\u3001\u57fa\u672c\u7684\u306a\u6982\u5ff5\u306f\u3053\u3053\u3067\u793a\u3057\u305f\u5b9f\u88c5\u3068\u540c\u69d8\u3067\u3059\u3002\n\n### \u8907\u5408\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u4f8b\n\n\u6700\u5f8c\u306b\u3001\u3053\u308c\u307e\u3067\u7d39\u4ecb\u3057\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n#### \u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u30b7\u30b9\u30c6\u30e0\uff08\u30a4\u30d9\u30f3\u30c8\u30d0\u30b9\uff09\n\n```php\n\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30a4\u30d9\u30f3\u30c8\u30d0\u30b9\u306e\u5b9f\u88c5\n *\/\nclass EventBus {\n    private $subscribers = [];\n    private $eventHistory = [];\n    private $maxHistorySize = 100;\n    private $wildcardSubscribers = [];\n    \n    \/**\n     * \u30a4\u30d9\u30f3\u30c8\u306b\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u30fc\u3092\u767b\u9332\n     * \n     * @param string $eventName \u30a4\u30d9\u30f3\u30c8\u540d\n     * @param callable $callback \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\n     * @param int $priority \u512a\u5148\u5ea6\uff08\u5927\u304d\u3044\u307b\u3069\u5148\u306b\u5b9f\u884c\uff09\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function subscribe($eventName, $callback, $priority = 0) {\n        if ($eventName === '*') {\n            $this-&gt;wildcardSubscribers[] = [\n                'callback' =&gt; $callback,\n                'priority' =&gt; $priority\n            ];\n            \n            \/\/ \u512a\u5148\u5ea6\u3067\u30bd\u30fc\u30c8\n            usort($this-&gt;wildcardSubscribers, function($a, $b) {\n                return $b['priority'] - $a['priority'];\n            });\n            \n            return $this;\n        }\n        \n        if (!isset($this-&gt;subscribers[$eventName])) {\n            $this-&gt;subscribers[$eventName] = [];\n        }\n        \n        $this-&gt;subscribers[$eventName][] = [\n            'callback' =&gt; $callback,\n            'priority' =&gt; $priority\n        ];\n        \n        \/\/ \u512a\u5148\u5ea6\u3067\u30bd\u30fc\u30c8\n        usort($this-&gt;subscribers[$eventName], function($a, $b) {\n            return $b['priority'] - $a['priority'];\n        });\n        \n        return $this;\n    }\n    \n    \/**\n     * \u30a4\u30d9\u30f3\u30c8\u3092\u767a\u706b\n     * \n     * @param string $eventName \u30a4\u30d9\u30f3\u30c8\u540d\n     * @param mixed $data \u30a4\u30d9\u30f3\u30c8\u30c7\u30fc\u30bf\n     * @return array \u5404\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u30fc\u306e\u623b\u308a\u5024\n     *\/\n    public function publish($eventName, $data = null) {\n        $event = [\n            'name' =&gt; $eventName,\n            'data' =&gt; $data,\n            'timestamp' =&gt; microtime(true)\n        ];\n        \n        \/\/ \u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\u306b\u8ffd\u52a0\n        $this-&gt;addToHistory($event);\n        \n        $results = [];\n        \n        \/\/ \u7279\u5b9a\u306e\u30a4\u30d9\u30f3\u30c8\u306b\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d6\u3057\u3066\u3044\u308b\u30ea\u30b9\u30ca\u30fc\u3092\u547c\u3073\u51fa\u3057\n        if (isset($this-&gt;subscribers[$eventName])) {\n            foreach ($this-&gt;subscribers[$eventName] as $subscriber) {\n                $results[] = call_user_func($subscriber['callback'], $data, $event);\n            }\n        }\n        \n        \/\/ \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u30fc\u3092\u547c\u3073\u51fa\u3057\n        foreach ($this-&gt;wildcardSubscribers as $subscriber) {\n            $results[] = call_user_func($subscriber['callback'], $data, $event);\n        }\n        \n        return $results;\n    }\n    \n    \/**\n     * \u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\u306b\u8ffd\u52a0\n     * \n     * @param array $event \u30a4\u30d9\u30f3\u30c8\u60c5\u5831\n     *\/\n    private function addToHistory($event) {\n        \/\/ \u5c65\u6b74\u306b\u8ffd\u52a0\n        $this-&gt;eventHistory[] = $event;\n        \n        \/\/ \u5c65\u6b74\u306e\u30b5\u30a4\u30ba\u3092\u5236\u9650\n        if (count($this-&gt;eventHistory) &gt; $this-&gt;maxHistorySize) {\n            $this-&gt;eventHistory = array_slice(\n                $this-&gt;eventHistory, \n                count($this-&gt;eventHistory) - $this-&gt;maxHistorySize\n            );\n        }\n    }\n    \n    \/**\n     * \u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\u3092\u53d6\u5f97\n     * \n     * @param string|null $eventName \u7279\u5b9a\u306e\u30a4\u30d9\u30f3\u30c8\u540d\uff08null\u3067\u3059\u3079\u3066\uff09\n     * @param int $limit \u53d6\u5f97\u3059\u308b\u6700\u5927\u4ef6\u6570\n     * @return array \u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\n     *\/\n    public function getHistory($eventName = null, $limit = 10) {\n        $history = $this-&gt;eventHistory;\n        \n        \/\/ \u7279\u5b9a\u306e\u30a4\u30d9\u30f3\u30c8\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n        if ($eventName !== null) {\n            $history = array_filter($history, function($event) use ($eventName) {\n                return $event['name'] === $eventName;\n            });\n        }\n        \n        \/\/ \u6700\u65b0\u306e\u6307\u5b9a\u4ef6\u6570\u3092\u53d6\u5f97\n        return array_slice($history, -$limit);\n    }\n    \n    \/**\n     * \u30a4\u30d9\u30f3\u30c8\u306e\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u30fc\u6570\u3092\u53d6\u5f97\n     * \n     * @param string $eventName \u30a4\u30d9\u30f3\u30c8\u540d\n     * @return int \u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d0\u30fc\u6570\n     *\/\n    public function countSubscribers($eventName) {\n        if ($eventName === '*') {\n            return count($this-&gt;wildcardSubscribers);\n        }\n        \n        return isset($this-&gt;subscribers[$eventName]) \n            ? count($this-&gt;subscribers[$eventName]) \n            : 0;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\n$events = new EventBus();\n\n\/\/ \u30ed\u30b0\u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\uff08\u9ad8\u512a\u5148\u5ea6\uff09\n$events-&gt;subscribe('user.login', function($user) {\n    echo \"[\u9ad8\u512a\u5148\u5ea6] \u30e6\u30fc\u30b6\u30fc\u30ed\u30b0\u30a4\u30f3: {$user['name']}\\n\";\n    \/\/ \u76e3\u67fb\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u306a\u3069\n    return true;\n}, 100);\n\n\/\/ \u901a\u77e5\u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\uff08\u6a19\u6e96\u512a\u5148\u5ea6\uff09\n$events-&gt;subscribe('user.login', function($user) {\n    echo \"[\u6a19\u6e96\u512a\u5148\u5ea6] \u30e6\u30fc\u30b6\u30fc\u30ed\u30b0\u30a4\u30f3\u901a\u77e5\u3092\u9001\u4fe1: {$user['email']}\\n\";\n    \/\/ \u30e1\u30fc\u30eb\u901a\u77e5\u3092\u9001\u4fe1\u3059\u308b\u306a\u3069\n    return true;\n});\n\n\/\/ \u7d71\u8a08\u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\uff08\u4f4e\u512a\u5148\u5ea6\uff09\n$events-&gt;subscribe('user.login', function($user) {\n    echo \"[\u4f4e\u512a\u5148\u5ea6] \u30ed\u30b0\u30a4\u30f3\u7d71\u8a08\u3092\u66f4\u65b0\\n\";\n    \/\/ \u30a2\u30af\u30bb\u30b9\u7d71\u8a08\u3092\u66f4\u65b0\u3059\u308b\u306a\u3069\n    return true;\n}, -10);\n\n\/\/ \u3059\u3079\u3066\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u30b0\u30ed\u30fc\u30d0\u30eb\u30ea\u30b9\u30ca\u30fc\n$events-&gt;subscribe('*', function($data, $event) {\n    echo \"[\u30b0\u30ed\u30fc\u30d0\u30eb] \u30a4\u30d9\u30f3\u30c8 '{$event['name']}' \u304c\u767a\u751f\u3057\u307e\u3057\u305f\\n\";\n    return true;\n});\n\n\/\/ \u30a4\u30d9\u30f3\u30c8\u3092\u767a\u706b\n$user = [\n    'id' =&gt; 123,\n    'name' =&gt; 'John Doe',\n    'email' =&gt; 'john@example.com'\n];\n\n$events-&gt;publish('user.login', $user);\n\n\/\/ \u4ed6\u306e\u30a4\u30d9\u30f3\u30c8\u3082\u767a\u706b\n$events-&gt;publish('user.logout', $user);\n$events-&gt;publish('system.error', ['code' =&gt; 500, 'message' =&gt; 'Database connection failed']);\n\n\/\/ \u30a4\u30d9\u30f3\u30c8\u5c65\u6b74\u3092\u8868\u793a\n$history = $events-&gt;getHistory();\necho \"\\n\u30a4\u30d9\u30f3\u30c8\u5c65\u6b74:\\n\";\nforeach ($history as $event) {\n    echo date('Y-m-d H:i:s', $event['timestamp']) . \": {$event['name']}\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-318\">\u4f9d\u5b58\u6027\u6ce8\u5165\u30b3\u30f3\u30c6\u30ca<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u4f9d\u5b58\u6027\u6ce8\u5165\u30b3\u30f3\u30c6\u30ca\n *\/\nclass Container {\n    private $services = [];\n    private $singletons = [];\n    private $resolved = [];\n    \n    \/**\n     * \u30b5\u30fc\u30d3\u30b9\u3092\u767b\u9332\n     * \n     * @param string $name \u30b5\u30fc\u30d3\u30b9\u540d\n     * @param callable $factory \u30b5\u30fc\u30d3\u30b9\u30d5\u30a1\u30af\u30c8\u30ea\u95a2\u6570\n     * @param bool $singleton \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u3068\u3057\u3066\u6271\u3046\u304b\u3069\u3046\u304b\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function register($name, $factory, $singleton = false) {\n        $this-&gt;services[$name] = $factory;\n        \n        if ($singleton) {\n            $this-&gt;singletons[$name] = true;\n        }\n        \n        return $this;\n    }\n    \n    \/**\n     * \u76f4\u63a5\u5024\u3092\u8a2d\u5b9a\n     * \n     * @param string $name \u30b5\u30fc\u30d3\u30b9\u540d\n     * @param mixed $value \u5024\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function set($name, $value) {\n        $this-&gt;resolved[$name] = $value;\n        return $this;\n    }\n    \n    \/**\n     * \u30b5\u30fc\u30d3\u30b9\u3092\u89e3\u6c7a\n     * \n     * @param string $name \u30b5\u30fc\u30d3\u30b9\u540d\n     * @return mixed \u89e3\u6c7a\u3055\u308c\u305f\u30b5\u30fc\u30d3\u30b9\n     *\/\n    public function get($name) {\n        \/\/ \u3059\u3067\u306b\u89e3\u6c7a\u6e08\u307f\u304b\u78ba\u8a8d\n        if (isset($this-&gt;resolved[$name])) {\n            return $this-&gt;resolved[$name];\n        }\n        \n        \/\/ \u767b\u9332\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u4f8b\u5916\n        if (!isset($this-&gt;services[$name])) {\n            throw new Exception(\"\u30b5\u30fc\u30d3\u30b9 '{$name}' \u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\");\n        }\n        \n        \/\/ \u30b5\u30fc\u30d3\u30b9\u3092\u89e3\u6c7a\n        $service = $this-&gt;services[$name]($this);\n        \n        \/\/ \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306a\u3089\u30ad\u30e3\u30c3\u30b7\u30e5\n        if (isset($this-&gt;singletons[$name]) &amp;&amp; $this-&gt;singletons[$name]) {\n            $this-&gt;resolved[$name] = $service;\n        }\n        \n        return $service;\n    }\n    \n    \/**\n     * \u30b5\u30fc\u30d3\u30b9\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\n     * \n     * @param string $name \u30b5\u30fc\u30d3\u30b9\u540d\n     * @return bool \u767b\u9332\u3055\u308c\u3066\u3044\u308c\u3070true\n     *\/\n    public function has($name) {\n        return isset($this-&gt;services[$name]) || isset($this-&gt;resolved[$name]);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u4f9d\u5b58\u6027\u6ce8\u5165\u30b3\u30f3\u30c6\u30ca\n$container = new Container();\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u767b\u9332\uff08\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\uff09\n$container-&gt;register('database', function() {\n    echo \"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u4f5c\u6210\u4e2d...\\n\";\n    return new stdClass(); \/\/ \u5b9f\u969b\u306fPDO\u306a\u3069\u3092\u8fd4\u3059\n}, true);\n\n\/\/ \u30ed\u30ac\u30fc\u30b5\u30fc\u30d3\u30b9\u3092\u767b\u9332\n$container-&gt;register('logger', function() {\n    echo \"\u30ed\u30ac\u30fc\u3092\u4f5c\u6210\u4e2d...\\n\";\n    return new stdClass(); \/\/ \u5b9f\u969b\u306fLogger\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n}, true);\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u767b\u9332\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4f9d\u5b58\uff09\n$container-&gt;register('userRepository', function($container) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u4f5c\u6210\u4e2d...\\n\";\n    $db = $container-&gt;get('database');\n    return new stdClass(); \/\/ \u5b9f\u969b\u306fUserRepository\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\n});\n\n\/\/ \u8a2d\u5b9a\u3092\u76f4\u63a5\u8a2d\u5b9a\n$container-&gt;set('config', [\n    'app_name' =&gt; 'My App',\n    'debug' =&gt; true\n]);\n\n\/\/ \u30b5\u30fc\u30d3\u30b9\u306e\u5229\u7528\n$userRepo = $container-&gt;get('userRepository');\necho \"userRepository\u53d6\u5f97\u5b8c\u4e86\\n\";\n\n\/\/ 2\u56de\u76ee\u306e\u53d6\u5f97\u3067\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u518d\u4f5c\u6210\u3055\u308c\u306a\u3044\uff08\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\uff09\n$userRepo2 = $container-&gt;get('userRepository');\necho \"userRepository2\u53d6\u5f97\u5b8c\u4e86\\n\";\n\n\/\/ \u8a2d\u5b9a\u306e\u53d6\u5f97\n$config = $container-&gt;get('config');\necho \"\u30a2\u30d7\u30ea\u540d: \" . $config['app_name'] . \"\\n\";\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u3066\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u69cb\u7bc9\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5805\u7262\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3001\u578b\u306e\u5b89\u5168\u6027\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306a\u3069\u304c\u5fc5\u8981\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u914d\u5217\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u306f\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3059\u3002\u30b9\u30bf\u30c3\u30af\u3001\u30ad\u30e5\u30fc\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u30eb\u30fc\u30bf\u30fc\u306a\u3069\u3001\u591a\u304f\u306e\u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3084\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u914d\u5217\u3092\u4f7f\u3063\u3066\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3067\u304d\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u64cd\u4f5c\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002echo \u201c\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \u201d . $queue-&gt;size() . \u201c\\n\u201d; \/\/ 3 echo \u201c\u5148\u982d\u8981\u7d20: \u201d . $queue-&gt;front() . \u201c\\n\u201d; \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u53d6\u308a\u51fa\u3057: \u201d . $queue-&gt;dequeue() . \u201c\\n\u201d; \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u53d6\u308a\u51fa\u3057: \u201d . $queue-&gt;dequeue() . \u201c\\n\u201d; \/\/ 2\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc echo \u201c\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \u201d . $queue-&gt;size() . \u201c\\n\u201d; \/\/ 1<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n\u30ad\u30e5\u30fc\u306e `dequeue()` \u64cd\u4f5c\u306f `array_shift()` \u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u8981\u7d20\u6570\u304c\u591a\u3044\u5834\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u6539\u5584\u3059\u308b\u305f\u3081\u306b\u3001SPL\u306eDoubleLinkedList\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u3092\u691c\u8a0e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\n\n#### \u4e21\u7aef\u30ad\u30e5\u30fc\uff08Deque\uff09\u306e\u5b9f\u88c5\n\n\u4e21\u7aef\u30ad\u30e5\u30fc\u306f\u3001\u4e21\u7aef\u304b\u3089\u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\u304c\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\n\n```php\n\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u4e21\u7aef\u30ad\u30e5\u30fc\u5b9f\u88c5\n *\/\nclass Deque {\n    private $items = [];\n    \n    \/**\n     * \u5148\u982d\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     *\/\n    public function addFront($item) {\n        array_unshift($this-&gt;items, $item);\n    }\n    \n    \/**\n     * \u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     *\/\n    public function addRear($item) {\n        $this-&gt;items[] = $item;\n    }\n    \n    \/**\n     * \u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u524a\u9664\n     *\/\n    public function removeFront() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items);\n    }\n    \n    \/**\n     * \u672b\u5c3e\u304b\u3089\u8981\u7d20\u3092\u524a\u9664\n     *\/\n    public function removeRear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_pop($this-&gt;items);\n    }\n    \n    \/**\n     * \u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\n     *\/\n    public function front() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u672b\u5c3e\u8981\u7d20\u3092\u53c2\u7167\n     *\/\n    public function rear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    \/**\n     * \u7a7a\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u8981\u7d20\u6570\u3092\u53d6\u5f97\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$deque = new Deque();\n$deque-&gt;addRear(\"Item 1\");\n$deque-&gt;addRear(\"Item 2\");\n$deque-&gt;addFront(\"Item 0\");\n\necho \"\u5148\u982d\u8981\u7d20: \" . $deque-&gt;front() . \"\\n\";      \/\/ Item 0\necho \"\u672b\u5c3e\u8981\u7d20: \" . $deque-&gt;rear() . \"\\n\";       \/\/ Item 2\necho \"\u5148\u982d\u304b\u3089\u524a\u9664: \" . $deque-&gt;removeFront() . \"\\n\"; \/\/ Item 0\necho \"\u672b\u5c3e\u304b\u3089\u524a\u9664: \" . $deque-&gt;removeRear() . \"\\n\";  \/\/ Item 2\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-319\">\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u8df5\u7684\u306a\u5fdc\u7528\u4f8b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5c65\u6b74\u7ba1\u7406\uff08\u30b9\u30bf\u30c3\u30af\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u64cd\u4f5c\u5c65\u6b74\u7ba1\u7406\u30af\u30e9\u30b9\n *\/\nclass History {\n    private $undoStack;\n    private $redoStack;\n    private $maxHistory;\n    \n    public function __construct($maxHistory = 20) {\n        $this-&gt;undoStack = new EfficientStack();\n        $this-&gt;redoStack = new EfficientStack();\n        $this-&gt;maxHistory = $maxHistory;\n    }\n    \n    \/**\n     * \u65b0\u3057\u3044\u64cd\u4f5c\u3092\u5c65\u6b74\u306b\u8ffd\u52a0\n     *\/\n    public function addAction($action) {\n        $this-&gt;undoStack-&gt;push($action);\n        \n        \/\/ \u5c65\u6b74\u306e\u4e0a\u9650\u3092\u7ba1\u7406\n        while ($this-&gt;undoStack-&gt;size() &gt; $this-&gt;maxHistory) {\n            $this-&gt;undoStack-&gt;pop();\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u64cd\u4f5c\u304c\u8ffd\u52a0\u3055\u308c\u305f\u306e\u3067Redo\u5c65\u6b74\u306f\u30af\u30ea\u30a2\n        $this-&gt;redoStack-&gt;clear();\n    }\n    \n    \/**\n     * \u76f4\u524d\u306e\u64cd\u4f5c\u3092\u53d6\u308a\u6d88\u3057\n     *\/\n    public function undo() {\n        if ($this-&gt;undoStack-&gt;isEmpty()) {\n            return null;\n        }\n        \n        $action = $this-&gt;undoStack-&gt;pop();\n        $this-&gt;redoStack-&gt;push($action);\n        return $action;\n    }\n    \n    \/**\n     * \u53d6\u308a\u6d88\u3057\u305f\u64cd\u4f5c\u3092\u3084\u308a\u76f4\u3057\n     *\/\n    public function redo() {\n        if ($this-&gt;redoStack-&gt;isEmpty()) {\n            return null;\n        }\n        \n        $action = $this-&gt;redoStack-&gt;pop();\n        $this-&gt;undoStack-&gt;push($action);\n        return $action;\n    }\n    \n    \/**\n     * \u5b9f\u884c\u53ef\u80fd\u306a\u53d6\u308a\u6d88\u3057\u64cd\u4f5c\u304c\u3042\u308b\u304b\n     *\/\n    public function canUndo() {\n        return !$this-&gt;undoStack-&gt;isEmpty();\n    }\n    \n    \/**\n     * \u5b9f\u884c\u53ef\u80fd\u306a\u3084\u308a\u76f4\u3057\u64cd\u4f5c\u304c\u3042\u308b\u304b\n     *\/\n    public function canRedo() {\n        return !$this-&gt;redoStack-&gt;isEmpty();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$history = new History();\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u5165\u529b: Hello\");\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\");\n$history-&gt;addAction(\"\u30c6\u30ad\u30b9\u30c8\u524a\u9664: World\");\n\necho \"\u53d6\u308a\u6d88\u3057: \" . $history-&gt;undo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u524a\u9664: World\necho \"\u53d6\u308a\u6d88\u3057: \" . $history-&gt;undo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\necho \"\u3084\u308a\u76f4\u3057: \" . $history-&gt;redo() . \"\\n\"; \/\/ \u30c6\u30ad\u30b9\u30c8\u5165\u529b: World\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5e45\u512a\u5148\u63a2\u7d22\uff08\u30ad\u30e5\u30fc\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u8ff7\u8def\u306e\u6700\u77ed\u7d4c\u8def\u3092\u5e45\u512a\u5148\u63a2\u7d22\u3067\u89e3\u304f\n * \n * @param array $maze \u8ff7\u8def\u30c7\u30fc\u30bf\uff082\u6b21\u5143\u914d\u5217\uff09\n * @param array $start \u958b\u59cb\u4f4d\u7f6e [\u884c, \u5217]\n * @param array $goal \u76ee\u6a19\u4f4d\u7f6e [\u884c, \u5217]\n * @return array|null \u6700\u77ed\u7d4c\u8def\u307e\u305f\u306f\u5230\u9054\u4e0d\u80fd\u306e\u5834\u5408null\n *\/\nfunction solveMaze($maze, $start, $goal) {\n    $rows = count($maze);\n    $cols = count($maze[0]);\n    \n    \/\/ \u8a2a\u554f\u6e08\u307f\u30bb\u30eb\u3092\u8ffd\u8de1\n    $visited = [];\n    for ($i = 0; $i &lt; $rows; $i++) {\n        $visited[$i] = array_fill(0, $cols, false);\n    }\n    \n    \/\/ \u63a2\u7d22\u30ad\u30e5\u30fc\u3092\u521d\u671f\u5316\n    $queue = new Queue();\n    $queue-&gt;enqueue([$start, []]); \/\/ [\u73fe\u5728\u4f4d\u7f6e, \u3053\u3053\u307e\u3067\u306e\u7d4c\u8def]\n    $visited[$start[0]][$start[1]] = true;\n    \n    \/\/ \u79fb\u52d5\u65b9\u5411\uff08\u4e0a\u3001\u53f3\u3001\u4e0b\u3001\u5de6\uff09\n    $directions = [[-1, 0], [0, 1], [1, 0], [0, -1]];\n    $dirNames = ['\u4e0a', '\u53f3', '\u4e0b', '\u5de6'];\n    \n    while (!$queue-&gt;isEmpty()) {\n        [$current, $path] = $queue-&gt;dequeue();\n        [$r, $c] = $current;\n        \n        \/\/ \u76ee\u6a19\u306b\u5230\u9054\u3057\u305f\u304b\u78ba\u8a8d\n        if ($r === $goal[0] &amp;&amp; $c === $goal[1]) {\n            return $path; \/\/ \u6700\u77ed\u7d4c\u8def\u3092\u8fd4\u3059\n        }\n        \n        \/\/ \u56db\u65b9\u5411\u3092\u63a2\u7d22\n        for ($i = 0; $i &lt; 4; $i++) {\n            $newR = $r + $directions[$i][0];\n            $newC = $c + $directions[$i][1];\n            \n            \/\/ \u8ff7\u8def\u306e\u7bc4\u56f2\u5185\u304b\u78ba\u8a8d\n            if ($newR &gt;= 0 &amp;&amp; $newR &lt; $rows &amp;&amp; $newC &gt;= 0 &amp;&amp; $newC &lt; $cols) {\n                \/\/ \u901a\u884c\u53ef\u80fd\u304b\u3064\u672a\u8a2a\u554f\u306a\u3089\u51e6\u7406\n                if ($maze[$newR][$newC] === 0 &amp;&amp; !$visited[$newR][$newC]) {\n                    $visited[$newR][$newC] = true;\n                    $newPath = $path;\n                    $newPath[] = $dirNames[$i];\n                    $queue-&gt;enqueue([[$newR, $newC], $newPath]);\n                }\n            }\n        }\n    }\n    \n    return null; \/\/ \u7d4c\u8def\u304c\u898b\u3064\u304b\u3089\u306a\u3044\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u8ff7\u8def\u306e\u63a2\u7d22\n$maze = [\n    [0, 1, 0, 0, 0],\n    [0, 1, 0, 1, 0],\n    [0, 0, 0, 1, 0],\n    [1, 1, 0, 1, 0],\n    [0, 0, 0, 0, 0]\n];\n\n$start = [0, 0]; \/\/ \u5de6\u4e0a\n$goal = [4, 4];  \/\/ \u53f3\u4e0b\n\n$path = solveMaze($maze, $start, $goal);\n\nif ($path) {\n    echo \"\u6700\u77ed\u7d4c\u8def: \" . implode(\" \u2192 \", $path) . \"\\n\";\n} else {\n    echo \"\u7d4c\u8def\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\\n\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-320\">\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u8a08\u7b97\u30b3\u30b9\u30c8\u306e\u9ad8\u3044\u64cd\u4f5c\u306e\u7d50\u679c\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u305f\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-321\">\u57fa\u672c\u7684\u306a\u30a4\u30f3\u30e1\u30e2\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30a4\u30f3\u30e1\u30e2\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n *\/\nclass SimpleCache {\n    private $cache = [];\n    private $expirations = [];\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $value \u4fdd\u5b58\u3059\u308b\u5024\n     * @param int $ttl \u6709\u52b9\u671f\u9593\uff08\u79d2\uff09\u30010\u306f\u7121\u671f\u9650\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function set($key, $value, $ttl = 0) {\n        $this-&gt;cache[$key] = $value;\n        \n        if ($ttl &gt; 0) {\n            $this-&gt;expirations[$key] = time() + $ttl;\n        } else {\n            unset($this-&gt;expirations[$key]);\n        }\n        \n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $default \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     * @return mixed \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     *\/\n    public function get($key, $default = null) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!$this-&gt;has($key)) {\n            return $default;\n        }\n        \n        return $this-&gt;cache[$key];\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u6709\u52b9\u671f\u9650\u5185\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u6709\u52b9\u671f\u9650\u5185\u306a\u3089true\n     *\/\n    public function has($key) {\n        \/\/ \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!isset($this-&gt;cache[$key])) {\n            return false;\n        }\n        \n        \/\/ \u6709\u52b9\u671f\u9650\u3092\u30c1\u30a7\u30c3\u30af\n        if (isset($this-&gt;expirations[$key]) &amp;&amp; $this-&gt;expirations[$key] &lt; time()) {\n            \/\/ \u671f\u9650\u5207\u308c\u306a\u306e\u3067\u524a\u9664\n            $this-&gt;delete($key);\n            return false;\n        }\n        \n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function delete($key) {\n        unset($this-&gt;cache[$key]);\n        unset($this-&gt;expirations[$key]);\n        return true;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5168\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function clear() {\n        $this-&gt;cache = [];\n        $this-&gt;expirations = [];\n        return true;\n    }\n    \n    \/**\n     * \u671f\u9650\u5207\u308c\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n     * \n     * @return int \u524a\u9664\u3055\u308c\u305f\u9805\u76ee\u6570\n     *\/\n    public function cleanup() {\n        $now = time();\n        $count = 0;\n        \n        foreach ($this-&gt;expirations as $key =&gt; $expiration) {\n            if ($expiration &lt; $now) {\n                $this-&gt;delete($key);\n                $count++;\n            }\n        }\n        \n        return $count;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$cache = new SimpleCache();\n\n\/\/ \u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\uff0860\u79d2\u9593\uff09\n$cache-&gt;set('user_123', ['id' =&gt; 123, 'name' =&gt; 'John Doe'], 60);\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\nif ($cache-&gt;has('user_123')) {\n    $user = $cache-&gt;get('user_123');\n    echo \"\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97: \u30e6\u30fc\u30b6\u30fc\u540d {$user['name']}\\n\";\n} else {\n    echo \"\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\\n\";\n}\n\n\/\/ \u671f\u9650\u5207\u308c\u3092\u610f\u56f3\u7684\u306b\u4f5c\u6210\n$cache-&gt;set('temp_data', '\u3059\u3050\u306b\u671f\u9650\u5207\u308c', 1);\nsleep(2);\n\n\/\/ \u671f\u9650\u5207\u308c\u306e\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9\nif ($cache-&gt;has('temp_data')) {\n    echo \"\u30c7\u30fc\u30bf\u306f\u307e\u3060\u6709\u52b9\u3067\u3059\\n\";\n} else {\n    echo \"\u30c7\u30fc\u30bf\u306f\u671f\u9650\u5207\u308c\u3067\u3059\\n\"; \/\/ \u3053\u308c\u304c\u8868\u793a\u3055\u308c\u308b\n}\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n$cleanedCount = $cache-&gt;cleanup();\necho \"\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7: {$cleanedCount}\u4ef6\u306e\u671f\u9650\u5207\u308c\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3057\u307e\u3057\u305f\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-322\">LRU\uff08Least Recently Used\uff09\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n<p>LRU\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u6700\u3082\u9577\u3044\u9593\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u9805\u76ee\u304c\u65b0\u3057\u3044\u9805\u76ee\u306e\u305f\u3081\u306b\u524a\u9664\u3055\u308c\u308b\u6226\u7565\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * LRU\uff08Least Recently Used\uff09\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n *\/\nclass LRUCache {\n    private $capacity;\n    private $cache = [];\n    private $usage = [];\n    \n    \/**\n     * \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n     * \n     * @param int $capacity \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6700\u5927\u5bb9\u91cf\n     *\/\n    public function __construct($capacity) {\n        $this-&gt;capacity = max(1, (int)$capacity);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $value \u4fdd\u5b58\u3059\u308b\u5024\n     * @return mixed \u4fdd\u5b58\u3055\u308c\u305f\u5024\n     *\/\n    public function put($key, $value) {\n        \/\/ \u30ad\u30fc\u304c\u3059\u3067\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u66f4\u65b0\n        if (isset($this-&gt;cache[$key])) {\n            $this-&gt;cache[$key] = $value;\n            $this-&gt;touch($key);\n            return $value;\n        }\n        \n        \/\/ \u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u3092\u8d85\u3048\u308b\u5834\u5408\u306f\u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n        if (count($this-&gt;cache) &gt;= $this-&gt;capacity) {\n            $this-&gt;evict();\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n        $this-&gt;cache[$key] = $value;\n        $this-&gt;touch($key);\n        \n        return $value;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @param mixed $default \u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     * @return mixed \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u5024\u307e\u305f\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n     *\/\n    public function get($key, $default = null) {\n        if (!isset($this-&gt;cache[$key])) {\n            return $default;\n        }\n        \n        \/\/ \u30a2\u30af\u30bb\u30b9\u6642\u9593\u3092\u66f4\u65b0\n        $this-&gt;touch($key);\n        \n        return $this-&gt;cache[$key];\n    }\n    \n    \/**\n     * \u30ad\u30fc\u306e\u4f7f\u7528\u6642\u9593\u3092\u66f4\u65b0\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     *\/\n    private function touch($key) {\n        \/\/ \u65e2\u5b58\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\n        if (isset($this-&gt;usage[$key])) {\n            unset($this-&gt;usage[$key]);\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u4f7f\u7528\u6642\u9593\u3092\u8a2d\u5b9a\n        $this-&gt;usage[$key] = microtime(true);\n    }\n    \n    \/**\n     * \u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n     *\/\n    private function evict() {\n        if (empty($this-&gt;usage)) {\n            return;\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30ad\u30fc\u3092\u691c\u7d22\n        $oldestKey = null;\n        $oldestTime = PHP_FLOAT_MAX;\n        \n        foreach ($this-&gt;usage as $key =&gt; $time) {\n            if ($time &lt; $oldestTime) {\n                $oldestTime = $time;\n                $oldestKey = $key;\n            }\n        }\n        \n        \/\/ \u6700\u3082\u53e4\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u524a\u9664\n        if ($oldestKey !== null) {\n            unset($this-&gt;cache[$oldestKey]);\n            unset($this-&gt;usage[$oldestKey]);\n        }\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u5185\u306e\u30a2\u30a4\u30c6\u30e0\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u30a2\u30a4\u30c6\u30e0\u6570\n     *\/\n    public function count() {\n        return count($this-&gt;cache);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308c\u3070true\n     *\/\n    public function has($key) {\n        return isset($this-&gt;cache[$key]);\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     * \n     * @param string $key \u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\n     * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n     *\/\n    public function delete($key) {\n        if (isset($this-&gt;cache[$key])) {\n            unset($this-&gt;cache[$key]);\n            unset($this-&gt;usage[$key]);\n            return true;\n        }\n        \n        return false;\n    }\n    \n    \/**\n     * \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5168\u30c7\u30fc\u30bf\u3092\u524a\u9664\n     *\/\n    public function clear() {\n        $this-&gt;cache = [];\n        $this-&gt;usage = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$cache = new LRUCache(3); \/\/ \u6700\u59273\u30a2\u30a4\u30c6\u30e0\u307e\u3067\u4fdd\u6301\n\n$cache-&gt;put('key1', 'Value 1');\n$cache-&gt;put('key2', 'Value 2');\n$cache-&gt;put('key3', 'Value 3');\n\necho \"\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba: \" . $cache-&gt;count() . \"\\n\";  \/\/ 3\n\n\/\/ key1\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u6700\u65b0\u306e\u4f7f\u7528\u72b6\u614b\u306b\u66f4\u65b0\n$cache-&gt;get('key1');\n\n\/\/ \u5bb9\u91cf\u3092\u8d85\u3048\u308b\u65b0\u3057\u3044\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n$cache-&gt;put('key4', 'Value 4');\n\n\/\/ key2\u304c\u524a\u9664\u3055\u308c\u3066\u3044\u308b\uff08\u6700\u3082\u9577\u304f\u4f7f\u308f\u308c\u3066\u3044\u306a\u3044\u305f\u3081\uff09\necho \"key1 exists: \" . ($cache-&gt;has('key1') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\necho \"key2 exists: \" . ($cache-&gt;has('key2') ? 'Yes' : 'No') . \"\\n\"; \/\/ No - \u524a\u9664\u3055\u308c\u305f\necho \"key3 exists: \" . ($cache-&gt;has('key3') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\necho \"key4 exists: \" . ($cache-&gt;has('key4') ? 'Yes' : 'No') . \"\\n\"; \/\/ Yes\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-323\">\u8a08\u7b97\u7d50\u679c\u306e\u30e1\u30e2\u5316\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u7528\u4f8b\uff09<\/h4>\n\n\n\n<p>\u8a08\u7b97\u30b3\u30b9\u30c8\u306e\u9ad8\u3044\u95a2\u6570\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u4f8b\u3067\u3059\u3002\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u8a08\u7b97\u306a\u3069\u306e\u518d\u5e30\u7684\u306a\u95a2\u6570\u3067\u7279\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u8a08\u7b97\u7d50\u679c\u3092\u30e1\u30e2\u5316\u3059\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30b3\u30ec\u30fc\u30bf\n * \n * @param callable $func \u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u95a2\u6570\n * @return callable \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u884c\u3046\u65b0\u3057\u3044\u95a2\u6570\n *\/\nfunction memoize(callable $func) {\n    $cache = [];\n    \n    return function() use ($func, &amp;$cache) {\n        $args = func_get_args();\n        $key = md5(serialize($args));\n        \n        if (!isset($cache[$key])) {\n            $cache[$key] = call_user_func_array($func, $args);\n        }\n        \n        return $cache[$key];\n    };\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u8a08\u7b97\n\n\/\/ \u30e1\u30e2\u5316\u306a\u3057\u306e\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u95a2\u6570\uff08\u975e\u52b9\u7387\uff09\nfunction fibonacci($n) {\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    return fibonacci($n - 1) + fibonacci($n - 2);\n}\n\n\/\/ \u30e1\u30e2\u5316\u3092\u4f7f\u3063\u305f\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u95a2\u6570\n$memoizedFib = memoize(function($n) use (&amp;$memoizedFib) {\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    return $memoizedFib($n - 1) + $memoizedFib($n - 2);\n});\n\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\n$n = 30;\n\n$start = microtime(true);\n$result1 = fibonacci($n);\n$time1 = microtime(true) - $start;\necho \"\u30e1\u30e2\u5316\u306a\u3057: fibonacci({$n}) = {$result1}, \u6642\u9593: {$time1}\u79d2\\n\";\n\n$start = microtime(true);\n$result2 = $memoizedFib($n);\n$time2 = microtime(true) - $start;\necho \"\u30e1\u30e2\u5316\u3042\u308a: fibonacci({$n}) = {$result2}, \u6642\u9593: {$time2}\u79d2\\n\";\necho \"\u9ad8\u901f\u5316\u7387: \" . number_format($time1 \/ $time2, 1) . \"\u500d\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-324\">\u914d\u5217\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n<p>\u73fe\u4ee3\u306eWeb\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001URL\u8981\u6c42\u3092\u9069\u5207\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3084\u30a2\u30af\u30b7\u30e7\u30f3\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u3066\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u304c\u3089\u6a5f\u80fd\u7684\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\n *\/\nclass Router {\n    private $routes = [];\n    private $notFoundHandler;\n    \n    \/**\n     * \u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     * \n     * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n     * @param string $path URL\u30d1\u30b9\n     * @param callable $handler \u51e6\u7406\u3092\u884c\u3046\u30cf\u30f3\u30c9\u30e9\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function addRoute($method, $path, $handler) {\n        $method = strtoupper($method);\n        $this-&gt;routes[$method][$path] = [\n            'handler' =&gt; $handler,\n            'params' =&gt; $this-&gt;extractParams($path)\n        ];\n        return $this;\n    }\n    \n    \/**\n     * GET\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function get($path, $handler) {\n        return $this-&gt;addRoute('GET', $path, $handler);\n    }\n    \n    \/**\n     * POST\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function post($path, $handler) {\n        return $this-&gt;addRoute('POST', $path, $handler);\n    }\n    \n    \/**\n     * PUT\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function put($path, $handler) {\n        return $this-&gt;addRoute('PUT', $path, $handler);\n    }\n    \n    \/**\n     * DELETE\u30eb\u30fc\u30c8\u3092\u8ffd\u52a0\n     *\/\n    public function delete($path, $handler) {\n        return $this-&gt;addRoute('DELETE', $path, $handler);\n    }\n    \n    \/**\n     * 404 Not Found\u30cf\u30f3\u30c9\u30e9\u3092\u8a2d\u5b9a\n     * \n     * @param callable $handler 404\u30cf\u30f3\u30c9\u30e9\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function setNotFoundHandler($handler) {\n        $this-&gt;notFoundHandler = $handler;\n        return $this;\n    }\n    \n    \/**\n     * \u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\n     * \n     * @param string $method HTTP\u30e1\u30bd\u30c3\u30c9\n     * @param string $path \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return mixed \u30cf\u30f3\u30c9\u30e9\u306e\u623b\u308a\u5024\n     *\/\n    public function dispatch($method, $path) {\n        $method = strtoupper($method);\n        \n        \/\/ HTTP\u30e1\u30bd\u30c3\u30c9\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n        if (!isset($this-&gt;routes[$method])) {\n            return $this-&gt;handleNotFound($path);\n        }\n        \n        \/\/ \u5b8c\u5168\u4e00\u81f4\u3059\u308b\u30eb\u30fc\u30c8\u3092\u691c\u7d22\n        if (isset($this-&gt;routes[$method][$path])) {\n            $route = $this-&gt;routes[$method][$path];\n            return call_user_func($route['handler']);\n        }\n        \n        \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u30eb\u30fc\u30c8\u3092\u691c\u7d22\n        foreach ($this-&gt;routes[$method] as $routePath =&gt; $route) {\n            $params = $this-&gt;matchRoute($routePath, $path);\n            if ($params !== null) {\n                \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30cf\u30f3\u30c9\u30e9\u306b\u6e21\u3059\n                return call_user_func_array($route['handler'], $params);\n            }\n        }\n        \n        \/\/ \u30eb\u30fc\u30c8\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\n        return $this-&gt;handleNotFound($path);\n    }\n    \n    \/**\n     * \u30d1\u30b9\u304b\u3089\u30d1\u30e9\u30e1\u30fc\u30bf\u90e8\u5206\u3092\u62bd\u51fa\n     * \n     * @param string $path \u30d1\u30b9\u30d1\u30bf\u30fc\u30f3\n     * @return array \u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u306e\u914d\u5217\n     *\/\n    private function extractParams($path) {\n        $params = [];\n        $parts = explode('\/', trim($path, '\/'));\n        \n        foreach ($parts as $part) {\n            if (strpos($part, ':') === 0) {\n                $params[] = substr($part, 1);\n            }\n        }\n        \n        return $params;\n    }\n    \n    \/**\n     * \u30d1\u30b9\u304c\u30eb\u30fc\u30c8\u30d1\u30bf\u30fc\u30f3\u3068\u30de\u30c3\u30c1\u3059\u308b\u304b\u78ba\u8a8d\n     * \n     * @param string $routePath \u30eb\u30fc\u30c8\u30d1\u30bf\u30fc\u30f3\n     * @param string $requestPath \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return array|null \u30de\u30c3\u30c1\u3057\u305f\u5834\u5408\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u5024\u306e\u914d\u5217\u3001\u3057\u306a\u3044\u5834\u5408\u306fnull\n     *\/\n    private function matchRoute($routePath, $requestPath) {\n        $routeParts = explode('\/', trim($routePath, '\/'));\n        $requestParts = explode('\/', trim($requestPath, '\/'));\n        \n        if (count($routeParts) !== count($requestParts)) {\n            return null;\n        }\n        \n        $params = [];\n        \n        for ($i = 0; $i &lt; count($routeParts); $i++) {\n            $routePart = $routeParts[$i];\n            $requestPart = $requestParts[$i];\n            \n            \/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u90e8\u5206\n            if (strpos($routePart, ':') === 0) {\n                $params[] = $requestPart;\n                continue;\n            }\n            \n            \/\/ \u56fa\u5b9a\u90e8\u5206\u304c\u4e00\u81f4\u3057\u306a\u3044\n            if ($routePart !== $requestPart) {\n                return null;\n            }\n        }\n        \n        return $params;\n    }\n    \n    \/**\n     * Not Found\u30cf\u30f3\u30c9\u30e9\u3092\u5b9f\u884c\n     * \n     * @param string $path \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\n     * @return mixed \u30cf\u30f3\u30c9\u30e9\u306e\u623b\u308a\u5024\n     *\/\n    private function handleNotFound($path) {\n        if (is_callable($this-&gt;notFoundHandler)) {\n            return call_user_func($this-&gt;notFoundHandler, $path);\n        }\n        \n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e404\u30ec\u30b9\u30dd\u30f3\u30b9\n        header('HTTP\/1.0 404 Not Found');\n        return \"404 Not Found: {$path}\";\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$router = new Router();\n\n\/\/ \u30eb\u30fc\u30c8\u306e\u5b9a\u7fa9\n$router-&gt;get('\/', function() {\n    return \"\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;get('\/about', function() {\n    return \"\u4f1a\u793e\u6982\u8981\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;get('\/users\/:id', function($id) {\n    return \"\u30e6\u30fc\u30b6\u30fcID: {$id} \u306e\u8a73\u7d30\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n$router-&gt;post('\/users', function() {\n    return \"\u65b0\u3057\u3044\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\";\n});\n\n$router-&gt;get('\/products\/:category\/:id', function($category, $id) {\n    return \"\u30ab\u30c6\u30b4\u30ea\u30fc: {$category}, \u5546\u54c1ID: {$id} \u306e\u5546\u54c1\u30da\u30fc\u30b8\u3067\u3059\";\n});\n\n\/\/ 404\u30cf\u30f3\u30c9\u30e9\u306e\u8a2d\u5b9a\n$router-&gt;setNotFoundHandler(function($path) {\n    return \"\u30da\u30fc\u30b8\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: {$path}\";\n});\n\n\/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u306e\u51e6\u7406\n$method = $_SERVER['REQUEST_METHOD'];\n$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);\n\n\/\/ \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u5b9f\u884c\n$response = $router-&gt;dispatch($method, $path);\necho $response;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-325\">\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u306e\u30eb\u30fc\u30bf\u30fc\u306e\u62e1\u5f35<\/h4>\n\n\n\n<p>\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u8a8d\u8a3c\u3084\u30ed\u30ae\u30f3\u30b0\u306a\u3069\u306e\u6a2a\u65ad\u7684\u95a2\u5fc3\u4e8b\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u7d71\u5408\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u5bfe\u5fdc\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\n *\/\nclass MiddlewareRouter extends Router {\n    private $middlewares = [];\n    \n    \/**\n     * \u30b0\u30ed\u30fc\u30d0\u30eb\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3092\u8ffd\u52a0\n     * \n     * @param callable $middleware \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u95a2\u6570\n     * @return self \u9023\u9396\u547c\u3073\u51fa\u3057\u7528\n     *\/\n    public function use($middleware## \u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\n\n\u914d\u5217\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u57fa\u76e4\u3068\u3057\u3066\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\u3001\u7c21\u6613\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u3001\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n\n### \u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306e\u5b9f\u88c5\n\n\u30b9\u30bf\u30c3\u30af\u3068\u30ad\u30e5\u30fc\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30b9\u306e\u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3092\u4f7f\u3063\u3066\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\n\n#### \u30b9\u30bf\u30c3\u30af\uff08LIFO: Last-In-First-Out\uff09\u306e\u5b9f\u88c5\n\n\u30b9\u30bf\u30c3\u30af\u306f\u300c\u5f8c\u5165\u308c\u5148\u51fa\u3057\u300d\u306e\u539f\u5247\u306b\u5f93\u3046\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002PHP\u306e\u914d\u5217\u95a2\u6570\u3092\u4f7f\u3063\u3066\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\n\n```php\n\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30c3\u30af\u5b9f\u88c5\n *\/\nclass Stack {\n    private $items = [];\n    \n    \/**\n     * \u8981\u7d20\u3092\u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u306b\u8ffd\u52a0\n     * \n     * @param mixed $item \u8ffd\u52a0\u3059\u308b\u8981\u7d20\n     * @return void\n     *\/\n    public function push($item) {\n        array_unshift($this-&gt;items, $item);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\n     * \n     * @return mixed \u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3001\u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function pop() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u306e\u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\uff08\u53d6\u308a\u51fa\u3055\u306a\u3044\uff09\n     * \n     * @return mixed \u5148\u982d\u8981\u7d20\u3001\u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function peek() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @return bool \u30b9\u30bf\u30c3\u30af\u304c\u7a7a\u306e\u5834\u5408true\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u5185\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u8981\u7d20\u6570\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    \/**\n     * \u30b9\u30bf\u30c3\u30af\u3092\u7a7a\u306b\u3059\u308b\n     * \n     * @return void\n     *\/\n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$stack = new Stack();\n$stack-&gt;push(\"\u6700\u521d\u306e\u8981\u7d20\");\n$stack-&gt;push(\"2\u756a\u76ee\u306e\u8981\u7d20\");\n$stack-&gt;push(\"3\u756a\u76ee\u306e\u8981\u7d20\");\n\necho \"\u30b9\u30bf\u30c3\u30af\u30b5\u30a4\u30ba: \" . $stack-&gt;size() . \"\\n\";  \/\/ 3\necho \"\u5148\u982d\u8981\u7d20: \" . $stack-&gt;peek() . \"\\n\";       \/\/ 3\u756a\u76ee\u306e\u8981\u7d20\necho \"\u53d6\u308a\u51fa\u3057: \" . $stack-&gt;pop() . \"\\n\";        \/\/ 3\u756a\u76ee\u306e\u8981\u7d20\necho \"\u53d6\u308a\u51fa\u3057: \" . $stack-&gt;pop() . \"\\n\";        \/\/ 2\u756a\u76ee\u306e\u8981\u7d20\necho \"\u30b9\u30bf\u30c3\u30af\u30b5\u30a4\u30ba: \" . $stack-&gt;size() . \"\\n\";  \/\/ 1\n<\/pre>\n\n\n\n<p>\u3082\u3063\u3068\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u3068\u3057\u3066\u3001\u672b\u5c3e\u3067\u306e\u64cd\u4f5c\u3092\u5229\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u3088\u308a\u52b9\u7387\u7684\u306a\u30b9\u30bf\u30c3\u30af\u5b9f\u88c5\uff08\u672b\u5c3e\u64cd\u4f5c\u7248\uff09\n *\/\nclass EfficientStack {\n    private $items = [];\n    \n    public function push($item) {\n        $this-&gt;items[] = $item; \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0 - O(1)\n    }\n    \n    public function pop() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_pop($this-&gt;items); \/\/ \u672b\u5c3e\u304b\u3089\u524a\u9664 - O(1)\n    }\n    \n    public function peek() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6700\u9069\u5316\u7248\u3067\u306f\u3001<code>array_push()<\/code>\/<code>array_pop()<\/code>\u3092\u4f7f\u7528\uff08\u307e\u305f\u306f<code>$array[] = $value<\/code>\u3068<code>array_pop()<\/code>\uff09\u3057\u3066\u304a\u308a\u3001\u5148\u982d\u3067\u306e\u64cd\u4f5c\uff08<code>array_unshift()<\/code>\/<code>array_shift()<\/code>\uff09\u3088\u308a\u3082\u52b9\u7387\u7684\u3067\u3059\u3002\u5148\u982d\u3067\u306e\u64cd\u4f5c\u306f\u3001\u914d\u5217\u5168\u4f53\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u518d\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081O(n)\u306e\u6642\u9593\u8907\u96d1\u5ea6\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-326\">\u30ad\u30e5\u30fc\uff08FIFO: First-In-First-Out\uff09\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<p>\u30ad\u30e5\u30fc\u306f\u300c\u5148\u5165\u308c\u5148\u51fa\u3057\u300d\u306e\u539f\u5247\u306b\u5f93\u3046\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u3092\u4f7f\u3063\u305f\u30ad\u30e5\u30fc\u5b9f\u88c5\n *\/\nclass Queue {\n    private $items = [];\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n     * \n     * @param mixed $item \u8ffd\u52a0\u3059\u308b\u8981\u7d20\n     * @return void\n     *\/\n    public function enqueue($item) {\n        $this-&gt;items[] = $item; \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0 - O(1)\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u5148\u982d\u304b\u3089\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3057\n     * \n     * @return mixed \u53d6\u308a\u51fa\u3057\u305f\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function dequeue() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return array_shift($this-&gt;items); \/\/ \u5148\u982d\u304b\u3089\u524a\u9664 - O(n)\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u5148\u982d\u8981\u7d20\u3092\u53c2\u7167\uff08\u53d6\u308a\u51fa\u3055\u306a\u3044\uff09\n     * \n     * @return mixed \u5148\u982d\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function front() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return $this-&gt;items[0];\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u306e\u672b\u5c3e\u8981\u7d20\u3092\u53c2\u7167\n     * \n     * @return mixed \u672b\u5c3e\u8981\u7d20\u3001\u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408\u306fnull\n     *\/\n    public function rear() {\n        if ($this-&gt;isEmpty()) {\n            return null;\n        }\n        return end($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n     * \n     * @return bool \u30ad\u30e5\u30fc\u304c\u7a7a\u306e\u5834\u5408true\n     *\/\n    public function isEmpty() {\n        return empty($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u5185\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\n     * \n     * @return int \u8981\u7d20\u6570\n     *\/\n    public function size() {\n        return count($this-&gt;items);\n    }\n    \n    \/**\n     * \u30ad\u30e5\u30fc\u3092\u7a7a\u306b\u3059\u308b\n     * \n     * @return void\n     *\/\n    public function clear() {\n        $this-&gt;items = [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$queue = new Queue();\n$queue-&gt;enqueue(\"\u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc\");\n$queue-&gt;enqueue(\"2\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc\");\n$queue-&gt;enqueue(\"3\u756a\u76ee\u306e\u30e6\u30fc\u30b6\u30fc\");\n\necho \"\u30ad\u30e5\u30fc\u30b5\u30a4\u30ba: \" . $queue-&gt;size() . \"\\n\";   \/\/ 3\necho \"\u5148\u982d\u8981\u7d20: \" . $queue-&gt;front() . \"\\n\";      \/\/ \u6700\u521d\u306e\u30e6\u30fc\u30b6\n<\/pre>\n\n\n\n<p>\/\/ \u8ffd\u52a0\u3055\u308c\u305f\u30ad\u30fc $addedKeys = array_diff_key($after, $before); foreach ($addedKeys as $key =&gt; $value) { $changes[\u2018added\u2019][$key] = $value; }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u524a\u9664\u3055\u308c\u305f\u30ad\u30fc\n$removedKeys = array_diff_key($before, $after);\nforeach ($removedKeys as $key =&gt; $value) {\n    $changes['removed'][$key] = $value;\n}\n\n\/\/ \u5909\u66f4\u3055\u308c\u305f\u30ad\u30fc\n$commonKeys = array_intersect_key($before, $after);\nforeach ($commonKeys as $key =&gt; $value) {\n    if ($before[$key] !== $after[$key]) {\n        $changes['changed'][$key] = [\n            'before' =&gt; $before[$key],\n            'after' =&gt; $after[$key]\n        ];\n    }\n}\n\nreturn $changes;\n<\/pre>\n\n\n\n<p>}<\/p>\n\n\n\n<p>\/\/ \u4f7f\u7528\u4f8b $before = [ \u2018status\u2019 =&gt; \u2018pending\u2019, \u2018items\u2019 =&gt; [\u2018item1\u2019, \u2018item2\u2019], \u2018count\u2019 =&gt; 2, \u2018old_field\u2019 =&gt; \u2018value\u2019 ];<\/p>\n\n\n\n<p>$after = [ \u2018status\u2019 =&gt; \u2018completed\u2019, \u2018items\u2019 =&gt; [\u2018item1\u2019, \u2018item2\u2019, \u2018item3\u2019], \u2018count\u2019 =&gt; 3, \u2018new_field\u2019 =&gt; \u2018new value\u2019 ];<\/p>\n\n\n\n<p>$diff = arrayDiff($before, $after); echo \u201c\u914d\u5217\u306e\u5909\u66f4:\\n\u201d; print_r($diff);<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n#### \u30ed\u30b0\u3078\u306e\u6bb5\u968e\u7684\u51fa\u529b\n\n\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u306e\u914d\u5217\u306e\u72b6\u614b\u3092\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3057\u307e\u3059\u3002\n\n```php\n\/**\n * \u914d\u5217\u306e\u72b6\u614b\u3092\u30ed\u30b0\u306b\u8a18\u9332\n * \n * @param mixed $data \u30ed\u30ae\u30f3\u30b0\u3059\u308b\u30c7\u30fc\u30bf\n * @param string $label \u30ed\u30b0\u30e9\u30d9\u30eb\n * @param string $logFile \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\n *\/\nfunction logArray($data, $label = '', $logFile = 'debug.log') {\n    $timestamp = date('Y-m-d H:i:s');\n    $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1);\n    $caller = basename($trace[0]['file']) . ':' . $trace[0]['line'];\n    \n    $header = \"[$timestamp] [$caller] \" . ($label ? \"[$label] \" : '');\n    $content = print_r($data, true);\n    \n    file_put_contents(\n        $logFile, \n        $header . \"\\n\" . $content . \"\\n\\n\", \n        FILE_APPEND\n    );\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$userData = ['name' =&gt; 'John', 'email' =&gt; 'john@example.com'];\nlogArray($userData, 'User Data');\n\n\/\/ \u51e6\u7406\u306e\u5404\u30b9\u30c6\u30c3\u30d7\u3067\u30ed\u30ae\u30f3\u30b0\nfunction processOrder($order) {\n    logArray($order, 'Order - Initial');\n    \n    \/\/ \u51e6\u7406\u30b9\u30c6\u30c3\u30d71\n    $order['status'] = 'processing';\n    logArray($order, 'Order - Processing');\n    \n    \/\/ \u51e6\u7406\u30b9\u30c6\u30c3\u30d72\n    $order['items'] = calculateItems($order);\n    logArray($order, 'Order - Items Calculated');\n    \n    \/\/ \u6700\u7d42\u51e6\u7406\n    $order['total'] = array_sum(array_column($order['items'], 'price'));\n    $order['status'] = 'completed';\n    logArray($order, 'Order - Completed');\n    \n    return $order;\n}\n\nfunction calculateItems($order) {\n    \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\n    return [\n        ['id' =&gt; 1, 'name' =&gt; 'Item 1', 'price' =&gt; 10.99],\n        ['id' =&gt; 2, 'name' =&gt; 'Item 2', 'price' =&gt; 20.50]\n    ];\n}\n\n$order = ['id' =&gt; 1001, 'customer_id' =&gt; 123];\n$processedOrder = processOrder($order);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-327\">Xdebug\u3092\u4f7f\u3063\u305f\u914d\u5217\u306e\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3<\/h3>\n\n\n\n<p>Xdebug\u306f\u3001PHP\u306e\u30c7\u30d0\u30c3\u30b0\u62e1\u5f35\u6a5f\u80fd\u3067\u3001\u914d\u5217\u306e\u51fa\u529b\u3092\u6539\u5584\u3057\u3001\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\u3084\u30c7\u30fc\u30bf\u306e\u30a4\u30f3\u30b9\u30da\u30af\u30b7\u30e7\u30f3\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u30c7\u30d0\u30c3\u30b0\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-328\">Xdebug\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u8a2d\u5b9a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># Ubuntu\u3084Debian\u3067\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u4f8b\nsudo apt-get install php-xdebug\n\n# CentOS\u3084RHEL\u3067\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u4f8b\nsudo yum install php-xdebug\n\n# php.ini\u306e\u8a2d\u5b9a\u4f8b\nxdebug.mode=develop,debug\nxdebug.start_with_request=yes\nxdebug.client_port=9003\nxdebug.client_host=127.0.0.1\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-329\">\u6539\u5584\u3055\u308c\u305fvar_dump\u51fa\u529b<\/h4>\n\n\n\n<p>Xdebug\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u308b\u3068\u3001var_dump()\u306e\u51fa\u529b\u304c\u81ea\u52d5\u7684\u306b\u6539\u5584\u3055\u308c\u3001\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Xdebug\u306a\u3057\nvar_dump($complexArray);\n\/\/ \u51fa\u529b: array(3) { [\"key1\"]=&gt; array(2) { [0]=&gt; string(5) \"value\" ... }\n\n\/\/ Xdebug\u3042\u308a\nvar_dump($complexArray);\n\/\/ \u51fa\u529b: \u6574\u5f62\u3055\u308c\u305f\u968e\u5c64\u69cb\u9020\u3067\u3001\u8272\u5206\u3051\u3055\u308c\u305fHTML\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-330\">\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u3068\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c<\/h4>\n\n\n\n<p>IDE\u3084\u30a8\u30c7\u30a3\u30bf\uff08VSCode\u3001PhpStorm\u3001Sublime Text\u306a\u3069\uff09\u3068\u9023\u643a\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u5185\u306b\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u5b9a\u3057\u3066\u3001\u5b9f\u884c\u3092\u4e00\u6642\u505c\u6b62\u3057\u3001\u5909\u6570\u306e\u5024\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u691c\u67fb\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = fetchData(); \/\/ \u3053\u3053\u306b\u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u5b9a\n$processed = [];\n\nforeach ($data as $key =&gt; $value) {\n    \/\/ \u5404\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u3067\u5b9f\u884c\u3092\u4e00\u6642\u505c\u6b62\u3057\u3001$data\u3001$key\u3001$value\u3092\u691c\u67fb\n    $processed[$key] = processValue($value);\n}\n\n$result = combineResults($processed);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-331\">\u914d\u5217\u306e\u90e8\u5206\u8a55\u4fa1<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u3092\u30c7\u30d0\u30c3\u30b0\u3059\u308b\u5834\u5408\u3001\u7279\u5b9a\u306e\u90e8\u5206\u3060\u3051\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5de8\u5927\u306a\u914d\u5217\u306e\u7279\u5b9a\u306e\u90e8\u5206\u306e\u307f\u3092\u8868\u793a\n$hugeArray = generateHugeArray();\n\n\/\/ Xdebug\u306eeval\u6a5f\u80fd\u3067\u90e8\u5206\u7684\u306b\u8a55\u4fa1\n\/\/ \u30d6\u30ec\u30a4\u30af\u30dd\u30a4\u30f3\u30c8\u3067\u505c\u6b62\u3057\u305f\u72b6\u614b\u3067\u3001\u30a6\u30a9\u30c3\u30c1\u5f0f\u3084\u8a55\u4fa1\u5f0f\u306b\u4ee5\u4e0b\u3092\u5165\u529b\n\/\/ $hugeArray['section']['specific_key']\n\/\/ array_slice($hugeArray, 0, 10)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-332\">Xdebug\u95a2\u6570\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>Xdebug\u304c\u63d0\u4f9b\u3059\u308b\u95a2\u6570\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u73fe\u5728\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u53d6\u5f97\n$trace = xdebug_get_function_stack();\nprint_r($trace);\n\n\/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u53d6\u5f97\n$memoryUsage = xdebug_memory_usage();\n$peakMemory = xdebug_peak_memory_usage();\necho \"\u73fe\u5728\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . formatBytes($memoryUsage) . \"\\n\";\necho \"\u30d4\u30fc\u30af\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . formatBytes($peakMemory) . \"\\n\";\n\nfunction formatBytes($bytes) {\n    $units = ['B', 'KB', 'MB', 'GB'];\n    $i = 0;\n    while ($bytes &gt;= 1024 &amp;&amp; $i &lt; count($units) - 1) {\n        $bytes \/= 1024;\n        $i++;\n    }\n    return round($bytes, 2) . ' ' . $units[$i];\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-333\">\u4e00\u822c\u7684\u306a\u914d\u5217\u30c7\u30d0\u30c3\u30b0\u306e\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h3>\n\n\n\n<p>\u914d\u5217\u3092\u6271\u3046\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-334\">1. Undefined index\/Undefined offset \u30a8\u30e9\u30fc<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\n$data = ['name' =&gt; 'John'];\necho $data['email']; \/\/ Warning: Undefined index: email\n\n\/\/ \u89e3\u6c7a\u7b561: isset()\u3067\u30c1\u30a7\u30c3\u30af\nif (isset($data['email'])) {\n    echo $data['email'];\n} else {\n    echo '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n}\n\n\/\/ \u89e3\u6c7a\u7b562: null\u5408\u4f53\u6f14\u7b97\u5b50\uff08PHP 7.0\u4ee5\u964d\uff09\necho $data['email'] ?? '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n\n\/\/ \u89e3\u6c7a\u7b563: array_key_exists()\u3092\u4f7f\u7528\nif (array_key_exists('email', $data)) {\n    echo $data['email']; \/\/ null\u3067\u3082\u8868\u793a\u3055\u308c\u308b\n} else {\n    echo '\u30e1\u30fc\u30eb\u30ad\u30fc\u304c\u5b58\u5728\u3057\u307e\u305b\u3093';\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-335\">2. \u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6df7\u540c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\n$data = json_decode('{\"name\":\"John\",\"email\":\"john@example.com\"}');\necho $data['name']; \/\/ Error: Cannot use object of type stdClass as array\n\n\/\/ \u89e3\u6c7a\u7b561: \u578b\u30c1\u30a7\u30c3\u30af\nvar_dump($data); \/\/ \u578b\u3092\u78ba\u8a8d\nif (is_object($data)) {\n    echo $data-&gt;name; \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u30a2\u30af\u30bb\u30b9\n} elseif (is_array($data)) {\n    echo $data['name']; \/\/ \u914d\u5217\u3068\u3057\u3066\u30a2\u30af\u30bb\u30b9\n}\n\n\/\/ \u89e3\u6c7a\u7b562: json_decode()\u306e\u7b2c2\u5f15\u6570\u3092\u4f7f\u7528\n$data = json_decode('{\"name\":\"John\",\"email\":\"john@example.com\"}', true);\necho $data['name']; \/\/ \u914d\u5217\u3068\u3057\u3066\u6b63\u3057\u304f\u30a2\u30af\u30bb\u30b9\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-336\">3. \u53c2\u7167\u306b\u3088\u308b\u4e88\u671f\u3057\u306a\u3044\u5909\u66f4<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\n$original = ['value' =&gt; 10];\n$arrays = [$original, $original]; \/\/ \u540c\u3058\u914d\u5217\u3078\u306e\u53c2\u7167\n\n$arrays[0]['value'] = 20;\nprint_r($arrays); \/\/ \u4e21\u65b9\u306e\u8981\u7d20\u304c\u5909\u66f4\u3055\u308c\u308b\n\n\/\/ \u89e3\u6c7a\u7b56: \u660e\u793a\u7684\u306b\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\n$original = ['value' =&gt; 10];\n$arrays = [$original, array_merge([], $original)]; \/\/ 2\u3064\u76ee\u306f\u65b0\u3057\u3044\u914d\u5217\n\n$arrays[0]['value'] = 20;\nprint_r($arrays); \/\/ 1\u3064\u76ee\u3060\u3051\u304c\u5909\u66f4\u3055\u308c\u308b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-337\">4. \u591a\u6b21\u5143\u914d\u5217\u306eNull\u53c2\u7167<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\n$data = [\n    'user' =&gt; [\n        'profile' =&gt; null\n    ]\n];\n\n$address = $data['user']['profile']['address']; \/\/ Error: Trying to access array offset on value of type null\n\n\/\/ \u89e3\u6c7a\u7b561: \u6bb5\u968e\u7684\u306b\u30c1\u30a7\u30c3\u30af\nif (isset($data['user']) &amp;&amp; isset($data['user']['profile']) &amp;&amp; isset($data['user']['profile']['address'])) {\n    $address = $data['user']['profile']['address'];\n} else {\n    $address = '\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n}\n\n\/\/ \u89e3\u6c7a\u7b562: \u914d\u5217\u30d1\u30b9\u53d6\u5f97\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u306e\u4f7f\u7528\nfunction array_get($array, $path, $default = null) {\n    $segments = is_array($path) ? $path : explode('.', $path);\n    $segment = array_shift($segments);\n    \n    if (!isset($array[$segment])) {\n        return $default;\n    }\n    \n    if (empty($segments)) {\n        return $array[$segment];\n    }\n    \n    return is_array($array[$segment]) \n        ? array_get($array[$segment], $segments, $default) \n        : $default;\n}\n\n$address = array_get($data, 'user.profile.address', '\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-338\">5. \u30e1\u30e2\u30ea\u5236\u9650\u306b\u9054\u3059\u308b\u554f\u984c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c: \u5927\u304d\u3059\u304e\u308b\u914d\u5217\u3067\u30e1\u30e2\u30ea\u5236\u9650\u306b\u9054\u3059\u308b\n$largeArray = range(1, 1000000); \/\/ \u5927\u91cf\u306e\u30e1\u30e2\u30ea\u3092\u4f7f\u7528\nprint_r($largeArray); \/\/ Fatal error: Allowed memory size of ... bytes exhausted\n\n\/\/ \u89e3\u6c7a\u7b561: \u30e1\u30e2\u30ea\u5236\u9650\u3092\u4e00\u6642\u7684\u306b\u5f15\u304d\u4e0a\u3052\u308b\nini_set('memory_limit', '512M');\n\n\/\/ \u89e3\u6c7a\u7b562: \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u914d\u5217\u5168\u4f53\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u307e\u306a\u3044\nfunction rangeGenerator($start, $end) {\n    for ($i = $start; $i &lt;= $end; $i++) {\n        yield $i;\n    }\n}\n\n$count = 0;\n$sum = 0;\nforeach (rangeGenerator(1, 1000000) as $number) {\n    $count++;\n    $sum += $number;\n    \n    \/\/ \u9032\u6357\u306e\u8868\u793a\uff0810\u4e07\u4ef6\u3054\u3068\uff09\n    if ($count % 100000 === 0) {\n        echo \"Processed: $count items, current sum: $sum\\n\";\n    }\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-339\">\u914d\u5217\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u3068\u30c7\u30d0\u30c3\u30b0<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u3001\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-340\">\u6642\u9593\u3068\u30e1\u30e2\u30ea\u306e\u6e2c\u5b9a<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u95a2\u6570\u306e\u5b9f\u884c\u6642\u9593\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6e2c\u5b9a\n * \n * @param callable $func \u6e2c\u5b9a\u3059\u308b\u95a2\u6570\n * @param array $args \u95a2\u6570\u306e\u5f15\u6570\n * @return array \u6e2c\u5b9a\u7d50\u679c\n *\/\nfunction profileFunction($func, $args = []) {\n    \/\/ \u958b\u59cb\u6642\u306e\u6e2c\u5b9a\n    $startTime = microtime(true);\n    $startMemory = memory_get_usage();\n    \n    \/\/ \u95a2\u6570\u5b9f\u884c\n    $result = call_user_func_array($func, $args);\n    \n    \/\/ \u7d42\u4e86\u6642\u306e\u6e2c\u5b9a\n    $endTime = microtime(true);\n    $endMemory = memory_get_usage();\n    \n    return [\n        'time' =&gt; ($endTime - $startTime) * 1000, \/\/ \u30df\u30ea\u79d2\u5358\u4f4d\n        'memory' =&gt; $endMemory - $startMemory,\n        'peak_memory' =&gt; memory_get_peak_usage(),\n        'result' =&gt; $result\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b: \u7570\u306a\u308b\u914d\u5217\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\n$testArray = range(1, 10000);\n\n\/\/ array_search() vs in_array()\n$searchProfiles = [\n    'array_search' =&gt; profileFunction('array_search', [5000, $testArray]),\n    'in_array' =&gt; profileFunction('in_array', [5000, $testArray])\n];\n\necho \"array_search(): {$searchProfiles['array_search']['time']}ms, \" . \n     formatBytes($searchProfiles['array_search']['memory']) . \"\\n\";\n     \necho \"in_array(): {$searchProfiles['in_array']['time']}ms, \" . \n     formatBytes($searchProfiles['in_array']['memory']) . \"\\n\";\n\n\/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u65b9\u6cd5\u306e\u6bd4\u8f03\n$filterCallback = function($n) { return $n % 2 === 0; };\n\n$filterProfiles = [\n    'array_filter' =&gt; profileFunction(\n        function() use ($testArray, $filterCallback) { \n            return array_filter($testArray, $filterCallback); \n        }\n    ),\n    'foreach' =&gt; profileFunction(\n        function() use ($testArray, $filterCallback) {\n            $result = [];\n            foreach ($testArray as $value) {\n                if ($filterCallback($value)) {\n                    $result[] = $value;\n                }\n            }\n            return $result;\n        }\n    )\n];\n\necho \"array_filter(): {$filterProfiles['array_filter']['time']}ms, \" . \n     formatBytes($filterProfiles['array_filter']['memory']) . \"\\n\";\n     \necho \"foreach: {$filterProfiles['foreach']['time']}ms, \" . \n     formatBytes($filterProfiles['foreach']['memory']) . \"\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-341\">\u7e70\u308a\u8fd4\u3057\u64cd\u4f5c\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u691c\u51fa<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u7e70\u308a\u8fd4\u3057\u64cd\u4f5c\u306e\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u3092\u691c\u51fa\n * \n * @param callable $func \u6e2c\u5b9a\u3059\u308b\u95a2\u6570\n * @param int $iterations \u7e70\u308a\u8fd4\u3057\u56de\u6570\n * @return array \u6e2c\u5b9a\u7d50\u679c\n *\/\nfunction detectBottlenecks($func, $iterations = 1000) {\n    $times = [];\n    $totalTime = 0;\n    \n    for ($i = 0; $i &lt; $iterations; $i++) {\n        $start = microtime(true);\n        $func();\n        $end = microtime(true);\n        \n        $executionTime = ($end - $start) * 1000; \/\/ \u30df\u30ea\u79d2\n        $times[] = $executionTime;\n        $totalTime += $executionTime;\n    }\n    \n    sort($times);\n    \n    return [\n        'min' =&gt; $times[0],\n        'max' =&gt; $times[$iterations - 1],\n        'avg' =&gt; $totalTime \/ $iterations,\n        'median' =&gt; $times[floor($iterations \/ 2)],\n        'percentile_95' =&gt; $times[floor($iterations * 0.95)],\n        'total' =&gt; $totalTime\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b: \u914d\u5217\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u306e\u6bd4\u8f03\n$array = range(1, 1000);\n$index = 500;\n\n$directAccess = detectBottlenecks(function() use ($array, $index) {\n    $value = $array[$index];\n});\n\n$searchAccess = detectBottlenecks(function() use ($array, $index) {\n    $key = array_search($index + 1, $array);\n    $value = $array[$key];\n});\n\necho \"\u76f4\u63a5\u30a2\u30af\u30bb\u30b9:\\n\";\nprint_r($directAccess);\n\necho \"\u691c\u7d22\u30a2\u30af\u30bb\u30b9:\\n\";\nprint_r($searchAccess);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-342\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u691c\u51fa<\/h4>\n\n\n\n<p>\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5897\u52a0\u3057\u7d9a\u3051\u308b\u5834\u5408\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u691c\u51fa\n * \n * @param callable $func \u6e2c\u5b9a\u3059\u308b\u95a2\u6570\n * @param int $iterations \u7e70\u308a\u8fd4\u3057\u56de\u6570\n * @return array \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5909\u5316\n *\/\nfunction detectMemoryLeak($func, $iterations = 100) {\n    $memoryUsage = [];\n    \n    for ($i = 0; $i &lt; $iterations; $i++) {\n        \/\/ \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u5f37\u5236\u5b9f\u884c\n        if (function_exists('gc_collect_cycles')) {\n            gc_collect_cycles();\n        }\n        \n        $beforeMemory = memory_get_usage();\n        $func();\n        $afterMemory = memory_get_usage();\n        \n        $memoryUsage[] = $afterMemory - $beforeMemory;\n        \n        \/\/ \u9032\u6357\u8868\u793a\n        if ($i % 10 === 0) {\n            echo \"Iteration $i: \" . formatBytes($afterMemory) . \"\\n\";\n        }\n    }\n    \n    return [\n        'start' =&gt; $memoryUsage[0],\n        'end' =&gt; $memoryUsage[$iterations - 1],\n        'diff' =&gt; $memoryUsage[$iterations - 1] - $memoryUsage[0],\n        'usage_pattern' =&gt; $memoryUsage\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b: \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u3042\u308b\u95a2\u6570\u3068\u4fee\u6b63\u5f8c\u306e\u6bd4\u8f03\nfunction leakyFunction() {\n    static $data = [];\n    $data[] = str_repeat('x', 1024 * 10); \/\/ 10KB\u8ffd\u52a0\n    return count($data);\n}\n\nfunction fixedFunction() {\n    static $data = [];\n    $data[] = str_repeat('x', 1024 * 10);\n    \n    \/\/ 100\u4ef6\u3092\u8d85\u3048\u305f\u3089\u53e4\u3044\u30c7\u30fc\u30bf\u3092\u524a\u9664\n    if (count($data) &gt; 100) {\n        array_shift($data);\n    }\n    \n    return count($data);\n}\n\necho \"\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u3042\u308b\u95a2\u6570:\\n\";\n$leakyResults = detectMemoryLeak('leakyFunction', 200);\nprint_r($leakyResults);\n\necho \"\\n\u4fee\u6b63\u5f8c\u306e\u95a2\u6570:\\n\";\n$fixedResults = detectMemoryLeak('fixedFunction', 200);\nprint_r($fixedResults);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-343\">\u52b9\u7387\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u90e8\u5206\u7684\u306a\u30c7\u30d0\u30c3\u30b0<\/strong>: \u5927\u304d\u306a\u914d\u5217\u5168\u4f53\u3067\u306f\u306a\u304f\u3001\u554f\u984c\u306e\u3042\u308b\u90e8\u5206\u3060\u3051\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u7e2e\u5c0f<\/strong>: \u958b\u767a\u4e2d\u306f\u5c0f\u3055\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u4f5c\u696d\u3057\u3001\u554f\u984c\u304c\u89e3\u6c7a\u3057\u305f\u3089\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u6bb5\u968e\u7684\u306a\u30c7\u30d0\u30c3\u30b0<\/strong>: \u8907\u96d1\u306a\u51e6\u7406\u3092\u5c0f\u3055\u306a\u90e8\u5206\u306b\u5206\u89e3\u3057\u3001\u5404\u6bb5\u968e\u3067\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\u306e\u6d3b\u7528<\/strong>: \u74b0\u5883\u5909\u6570\u3084\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u306b\u57fa\u3065\u3044\u3066\u3001\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3092\u6761\u4ef6\u4ed8\u304d\u3067\u8868\u793a\u3057\u307e\u3059\u3002 <code>function debug($data, $exit = false) { if (defined('DEBUG_MODE') &amp;&amp; DEBUG_MODE) { echo \"&lt;pre&gt;\"; print_r($data); echo \"&lt;\/pre&gt;\"; if ($exit) exit; } } \/\/ \u8a2d\u5b9a define('DEBUG_MODE', true); \/\/ \u4f7f\u7528 debug($complexData);<\/code><\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u78ba\u8a8d<\/strong>: PHP\u306e\u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u5b9a\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u8b66\u544a\u3084Notice\u3082\u898b\u9003\u3055\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002 <code>\/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u5834\u6240\u3092\u78ba\u8a8d echo ini_get('error_log'); \/\/ \u30a8\u30e9\u30fc\u30ec\u30dd\u30fc\u30c8\u30ec\u30d9\u30eb\u3092\u8a2d\u5b9a error_reporting(E_ALL); \/\/ \u30a8\u30e9\u30fc\u3092\u8868\u793a ini_set('display_errors', 1); \/\/ \u30a8\u30e9\u30fc\u3092\u30ed\u30b0\u306b\u8a18\u9332 ini_set('log_errors', 1);<\/code><\/li>\n<\/ol>\n\n\n\n<p>\u914d\u5217\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306f\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3059\u3002\u9069\u5207\u306a\u30c4\u30fc\u30eb\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u306e\u65e9\u671f\u767a\u898b\u3068\u89e3\u6c7a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u52b9\u7387\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u3001\u958b\u767a\u52b9\u7387\u3068\u54c1\u8cea\u5411\u4e0a\u306e\u30ab\u30ae\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u914d\u5217\u95a2\u9023\u306e\u30c8\u30d4\u30c3\u30af\u3092\u307e\u3068\u3081\u3001\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002## \u914d\u5217\u64cd\u4f5c\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/p>\n\n\n\n<p>\u914d\u5217\u306f\u591a\u304f\u306e\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u4fbf\u5229\u306a\u69cb\u9020\u3067\u3059\u304c\u3001\u305d\u306e\u8907\u96d1\u3055\u3086\u3048\u306b\u30c7\u30d0\u30c3\u30b0\u3082\u96e3\u3057\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u306e\u914d\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308b\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u624b\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u306e\u65e9\u671f\u767a\u898b\u3068\u89e3\u6c7a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-344\">print_r()\u3068var_dump()\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>PHP\u306b\u306f\u3001\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u5bb9\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u3068\u3057\u3066\u3001\u4e3b\u306b<code>print_r()<\/code>\u3068<code>var_dump()<\/code>\u306e2\u3064\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u4f7f\u7528\u76ee\u7684\u3084\u51fa\u529b\u5f62\u5f0f\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-345\">\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u9055\u3044<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = [\n    'id' =&gt; 123,\n    'name' =&gt; 'John Doe',\n    'email' =&gt; 'john@example.com',\n    'active' =&gt; true,\n    'roles' =&gt; ['editor', 'subscriber'],\n    'metadata' =&gt; null\n];\n\n\/\/ print_r() - \u8aad\u307f\u3084\u3059\u3044\u304c\u578b\u60c5\u5831\u306a\u3057\necho \"print_r() \u306e\u51fa\u529b:\\n\";\nprint_r($user);\n\n\/\/ var_dump() - \u8a73\u7d30\u3060\u304c\u5197\u9577\necho \"\\nvar_dump() \u306e\u51fa\u529b:\\n\";\nvar_dump($user);\n<\/pre>\n\n\n\n<p><code>print_r()<\/code>\u306f\u4eba\u9593\u304c\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u3067\u30c7\u30fc\u30bf\u3092\u8868\u793a\u3057\u3001<code>var_dump()<\/code>\u306f\u578b\u60c5\u5831\u3084\u9577\u3055\u306a\u3069\u306e\u8a73\u7d30\u60c5\u5831\u3082\u542b\u3081\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-46016342-c748-4dda-afa4-f8f13599860f\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u9577\u6240<\/th><th>\u77ed\u6240<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>print_r()<\/td><td>\u8aad\u307f\u3084\u3059\u3044\u3001\u7c21\u6f54<\/td><td>\u578b\u60c5\u5831\u306a\u3057\u3001NULL\/false\/\u7a7a\u6587\u5b57\u5217\u306e\u533a\u5225\u304c\u96e3\u3057\u3044<\/td><td>\u69cb\u9020\u306e\u6982\u8981\u628a\u63e1<\/td><\/tr><tr><td>var_dump()<\/td><td>\u578b\u60c5\u5831\u3042\u308a\u3001\u3088\u308a\u8a73\u7d30<\/td><td>\u5197\u9577\u3067\u8aad\u307f\u306b\u304f\u3044<\/td><td>\u8a73\u7d30\u306a\u30c7\u30d0\u30c3\u30b0\u3001\u578b\u306e\u78ba\u8a8d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-346\">\u51fa\u529b\u306e\u6574\u5f62<\/h4>\n\n\n\n<p>\u30d6\u30e9\u30a6\u30b6\u3067\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3092\u8868\u793a\u3059\u308b\u5834\u5408\u3001HTML\u304c\u89e3\u91c8\u3055\u308c\u3066\u6574\u5f62\u304c\u5d29\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u9632\u3050\u306b\u306f\u3001<code>&lt;pre&gt;<\/code>\u30bf\u30b0\u3092\u4f7f\u7528\u3059\u308b\u304b\u51fa\u529b\u3092HTML\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d6\u30e9\u30a6\u30b6\u3067\u306e\u8868\u793a\u7528\u306b\u6574\u5f62\necho \"&lt;pre&gt;\";\nprint_r($user);\necho \"&lt;\/pre&gt;\";\n\n\/\/ \u307e\u305f\u306f htmlspecialchars() \u3092\u4f7f\u7528\necho htmlspecialchars(print_r($user, true));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-347\">\u6587\u5b57\u5217\u3068\u3057\u3066\u53d6\u5f97<\/h4>\n\n\n\n<p>\u51fa\u529b\u3092\u305d\u306e\u307e\u307e\u8868\u793a\u305b\u305a\u3001\u5909\u6570\u306b\u683c\u7d0d\u3057\u305f\u3044\u5834\u5408\u306f\u3001<code>print_r()<\/code>\u306e\u7b2c2\u5f15\u6570\u306b<code>true<\/code>\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u51fa\u529b\u3092\u76f4\u63a5\u8868\u793a\u305b\u305a\u3001\u5909\u6570\u306b\u683c\u7d0d\n$output = print_r($user, true);\n\/\/ \u30ed\u30b0\u306b\u8a18\u9332\u3059\u308b\u306a\u3069\nfile_put_contents('debug.log', $output . \"\\n\", FILE_APPEND);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-348\">\u914d\u5217\u306e\u4e00\u90e8\u306e\u307f\u3092\u8868\u793a<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u306e\u4e00\u90e8\u3060\u3051\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u914d\u5217\u306e\u4e00\u90e8\u3092\u62bd\u51fa\u3057\u3066\u304b\u3089\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$largeArray = array_fill(0, 1000, '\u30c7\u30fc\u30bf');\n\n\/\/ \u6700\u521d\u306e5\u8981\u7d20\u3060\u3051\u3092\u8868\u793a\necho \"\u6700\u521d\u306e5\u8981\u7d20:\\n\";\nprint_r(array_slice($largeArray, 0, 5));\n\n\/\/ \u7279\u5b9a\u306e\u30ad\u30fc\u306e\u5024\u3060\u3051\u3092\u8868\u793a\n$complexData = [\n    'users' =&gt; [\/* \u5927\u91cf\u306e\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf *\/],\n    'products' =&gt; [\/* \u5927\u91cf\u306e\u5546\u54c1\u30c7\u30fc\u30bf *\/],\n    'settings' =&gt; ['theme' =&gt; 'dark', 'language' =&gt; 'ja', 'notifications' =&gt; true]\n];\n\necho \"\\n\u8a2d\u5b9a\u3060\u3051\u3092\u8868\u793a:\\n\";\nprint_r($complexData['settings']);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-349\">\u5927\u898f\u6a21\u914d\u5217\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u914d\u5217\u306f\u3001\u305d\u306e\u307e\u307e\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3059\u308b\u3068\u8aad\u307f\u306b\u304f\u304f\u306a\u3063\u305f\u308a\u3001\u30e1\u30e2\u30ea\u5236\u9650\u306b\u9054\u3057\u3066\u3057\u307e\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u3063\u3066\u3001\u52b9\u7387\u7684\u306b\u30c7\u30d0\u30c3\u30b0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-350\">\u69cb\u9020\u3068\u7d71\u8a08\u306e\u8981\u7d04\u8868\u793a<\/h4>\n\n\n\n<p>\u914d\u5217\u5168\u4f53\u3092\u8868\u793a\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u69cb\u9020\u3084\u7d71\u8a08\u60c5\u5831\u3092\u8981\u7d04\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u306e\u69cb\u9020\u3068\u7d71\u8a08\u3092\u8981\u7d04\u8868\u793a\u3059\u308b\n * \n * @param array $array \u5bfe\u8c61\u306e\u914d\u5217\n * @param int $maxDepth \u6700\u5927\u63a2\u7d22\u6df1\u5ea6\n * @param int $currentDepth \u73fe\u5728\u306e\u6df1\u5ea6\n * @return array \u7d71\u8a08\u60c5\u5831\n *\/\nfunction arrayStats($array, $maxDepth = 3, $currentDepth = 0) {\n    $stats = [\n        'count' =&gt; count($array),\n        'keys' =&gt; [],\n        'nested' =&gt; [],\n        'types' =&gt; []\n    ];\n    \n    \/\/ \u6df1\u5ea6\u5236\u9650\u30c1\u30a7\u30c3\u30af\n    if ($currentDepth &gt;= $maxDepth) {\n        return $stats;\n    }\n    \n    \/\/ \u6700\u521d\u306e10\u500b\u306e\u30ad\u30fc\u3092\u53d6\u5f97\uff08\u5927\u304d\u3044\u914d\u5217\u5bfe\u7b56\uff09\n    $keys = array_keys($array);\n    $stats['keys'] = array_slice($keys, 0, 10);\n    \n    if (count($keys) &gt; 10) {\n        $stats['keys'][] = '... and ' . (count($keys) - 10) . ' more';\n    }\n    \n    \/\/ \u5024\u306e\u578b\u306e\u5206\u5e03\u3092\u96c6\u8a08\n    foreach ($array as $key =&gt; $value) {\n        $type = gettype($value);\n        if (!isset($stats['types'][$type])) {\n            $stats['types'][$type] = 0;\n        }\n        $stats['types'][$type]++;\n        \n        \/\/ \u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u8abf\u67fb\n        if (is_array($value)) {\n            $stats['nested'][$key] = arrayStats($value, $maxDepth, $currentDepth + 1);\n        }\n    }\n    \n    return $stats;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$complexData = [\n    'users' =&gt; array_fill(0, 1000, ['name' =&gt; 'User', 'active' =&gt; true]),\n    'products' =&gt; array_fill(0, 500, ['title' =&gt; 'Product', 'price' =&gt; 29.99]),\n    'settings' =&gt; ['theme' =&gt; 'dark', 'language' =&gt; 'ja', 'flags' =&gt; [1, 2, 3]]\n];\n\necho \"\u914d\u5217\u306e\u7d71\u8a08:\\n\";\nprint_r(arrayStats($complexData));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-351\">\u63a2\u7d22\u30d1\u30b9\u306b\u3088\u308b\u7279\u5b9a\u90e8\u5206\u306e\u691c\u67fb<\/h4>\n\n\n\n<p>\u914d\u5217\u3078\u306e\u30d1\u30b9\u3092\u6307\u5b9a\u3057\u3066\u3001\u7279\u5b9a\u306e\u90e8\u5206\u3060\u3051\u3092\u691c\u67fb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u914d\u5217\u5185\u306e\u7279\u5b9a\u306e\u30d1\u30b9\u306b\u3042\u308b\u5024\u3092\u53d6\u5f97\n * \n * @param array $array \u5bfe\u8c61\u306e\u914d\u5217\n * @param string|array $path \u30c9\u30c3\u30c8\u8a18\u6cd5\u307e\u305f\u306f\u914d\u5217\u3067\u306e\u30d1\u30b9\n * @return mixed \u898b\u3064\u304b\u3063\u305f\u5024\n *\/\nfunction inspectPath($array, $path) {\n    if (is_string($path)) {\n        $path = explode('.', $path);\n    }\n    \n    $current = $array;\n    $fullPath = '';\n    \n    foreach ($path as $key) {\n        $fullPath .= ($fullPath ? '.' : '') . $key;\n        \n        if (!is_array($current) || !isset($current[$key])) {\n            echo \"\u30d1\u30b9 '$fullPath' \u306f\u5b58\u5728\u3057\u307e\u305b\u3093\\n\";\n            return null;\n        }\n        \n        $current = $current[$key];\n    }\n    \n    return $current;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$data = [\n    'user' =&gt; [\n        'profile' =&gt; [\n            'name' =&gt; 'John Doe',\n            'contact' =&gt; [\n                'email' =&gt; 'john@example.com',\n                'phone' =&gt; '123-456-7890'\n            ]\n        ],\n        'settings' =&gt; [\n            'notifications' =&gt; true\n        ]\n    ]\n];\n\n$email = inspectPath($data, 'user.profile.contact.email');\necho \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9: \" . $email . \"\\n\";\n\n$nonExistent = inspectPath($data, 'user.profile.address');\n\/\/ \"\u30d1\u30b9 'user.profile.address' \u306f\u5b58\u5728\u3057\u307e\u305b\u3093\" \u3068\u8868\u793a\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-352\">\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30bf\u30eb\u30c7\u30d0\u30c3\u30b0<\/h4>\n\n\n\n<p>\u7279\u5b9a\u306e\u914d\u5217\u304c\u5909\u66f4\u3055\u308c\u308b\u904e\u7a0b\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30c7\u30d0\u30c3\u30b0\u306e\u5909\u66f4\u3092\u8ffd\u8de1\u3059\u308b\n * \n * @param string $label \u30c7\u30d0\u30c3\u30b0\u30e9\u30d9\u30eb\n * @param array $array \u8868\u793a\u3059\u308b\u914d\u5217\n * @param bool $showTrace \u30d0\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u8868\u793a\u3059\u308b\u304b\n *\/\nfunction debugArray($label, $array, $showTrace = false) {\n    static $counter = 0;\n    $counter++;\n    \n    echo \"\\n===== DEBUG #{$counter}: {$label} =====\\n\";\n    print_r($array);\n    \n    if ($showTrace) {\n        $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1);\n        echo \"Called from: {$trace[0]['file']} (line {$trace[0]['line']})\\n\";\n    }\n    \n    echo \"=====================================\\n\";\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$data = ['status' =&gt; 'pending'];\n\ndebugArray('\u521d\u671f\u72b6\u614b', $data);\n\n$data['status'] = 'processing';\n$data['progress'] = 25;\ndebugArray('\u51e6\u7406\u4e2d', $data);\n\n$data['status'] = 'completed';\n$data['progress'] = 100;\n$data['completed_at'] = date('Y-m-d H:i:s');\ndebugArray('\u5b8c\u4e86', $data, true);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-353\">\u5dee\u5206\u6bd4\u8f03\u306b\u3088\u308b\u30c7\u30d0\u30c3\u30b0<\/h4>\n\n\n\n<p>\u51e6\u7406\u306e\u524d\u5f8c\u3067\u914d\u5217\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3057\u305f\u304b\u3092\u8abf\u3079\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * 2\u3064\u306e\u914d\u5217\u306e\u5dee\u5206\u3092\u8868\u793a\n * \n * @param array $before \u51e6\u7406\u524d\u306e\u914d\u5217\n * @param array $after \u51e6\u7406\u5f8c\u306e\u914d\u5217\n * @return array \u5909\u66f4\u306e\u6982\u8981\n *\/\nfunction arrayDiff($before, $after) {\n    $changes = [\n        'added' =&gt; [],\n        'removed' =&gt; [],\n        'changed' =&gt; []\n    ];\n    \n    \/\/ \u8ffd\u52a0\u3055\u308c\u305f\u30ad\u30fc\n    $addedKeys = array_diff_key($after, $before);\n    foreach ($addedKeys as $key =&gt; $value) {\n        $changes['added'][$key] = $value;\n    }\n    \n    \/\/ \u524a\u9664\n<\/pre>\n\n\n\n<ol start=\"7\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u64cd\u4f5c<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306f\u3001\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u52b9\u7387\u7684\u306b\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u305f\u3081\u306b\u53c2\u7167\u6e21\u3057\u3084\u4e0d\u8981\u30c7\u30fc\u30bf\u306e\u89e3\u653e\u3092\u6d3b\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30eb\u30fc\u30d7\u5185\u3067\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u6700\u5c0f\u9650\u306b\u3057\u3001\u53cd\u5fa9\u7684\u306a\u914d\u5217\u64cd\u4f5c\u3092\u7d71\u5408\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u3001\u5927\u898f\u6a21\u914d\u5217\u306e\u89e3\u653e\u3084\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u610f\u8b58\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>\n<ul class=\"wp-block-list\">\n<li><code>print_r()<\/code>\u3068<code>var_dump()<\/code>\u3092\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u914d\u5217\u306f\u90e8\u5206\u7684\u306b\u691c\u67fb\u3057\u3001\u69cb\u9020\u306e\u8981\u7d04\u3084\u63a2\u7d22\u30d1\u30b9\u3092\u6d3b\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>Xdebug\u3092\u4f7f\u7528\u3057\u3066\u9ad8\u5ea6\u306a\u30c7\u30d0\u30c3\u30b0\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\uff08Undefined index\/offset\u306a\u3069\uff09\u306b\u5bfe\u3059\u308b\u5bfe\u7b56\u3092\u7406\u89e3\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406<\/strong>\n<ul class=\"wp-block-list\">\n<li>CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u5909\u63db\u3001JSON\u30c7\u30fc\u30bf\u3068\u306e\u76f8\u4e92\u5909\u63db\u3092\u52b9\u7387\u7684\u306b\u884c\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u9069\u5207\u306a\u914d\u5217\u69cb\u9020\u306b\u5909\u63db\u3057\u3066\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u3068\u6b63\u898f\u5316\u3092\u7d44\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u51e6\u7406\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b9f\u88c5<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u3092\u6d3b\u7528\u3057\u3066\u30b9\u30bf\u30c3\u30af\u3001\u30ad\u30e5\u30fc\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30b7\u30b9\u30c6\u30e0\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52b9\u7387\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u8907\u5408\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-354\">\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u9078\u629e<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u7528\u9014\u306b\u9069\u3057\u305f\u914d\u5217\u306e\u7a2e\u985e\u3092\u9078\u629e\u3059\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u4ee5\u4e0a\u306b\u8907\u96d1\u306a\u69cb\u9020\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u8003\u616e\u3057\u3066\u8a2d\u8a08\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5927\u304d\u306a\u914d\u5217\u306e\u5834\u5408\u306f\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3084\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u30c7\u30fc\u30bf\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u51e6\u7406\u3092\u5206\u5272\u3057\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u7ba1\u7406\u3059\u308b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306b\u306a\u3063\u305f\u5927\u304d\u306a\u914d\u5217\u306f\u660e\u793a\u7684\u306b\u89e3\u653e\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u54c1\u8cea\u3068\u53ef\u8aad\u6027<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u306e\u69cb\u9020\u3092\u4e00\u8cab\u3055\u305b\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3059\u308b<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u64cd\u4f5c\u306b\u306f\u30b3\u30e1\u30f3\u30c8\u3092\u4ed8\u3051\u308b<\/li>\n\n\n\n<li>\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u4f5c\u6210\u3057\u3066\u5197\u9577\u306a\u30b3\u30fc\u30c9\u3092\u6e1b\u3089\u3059<\/li>\n\n\n\n<li>\u578b\u5ba3\u8a00\u3068\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\u524d\u306b\u5b58\u5728\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n\n\n\n<li>null\u5408\u4f53\u6f14\u7b97\u5b50\u3084\u6761\u4ef6\u5f0f\u3092\u4f7f\u3063\u3066\u5b89\u5168\u306b\u5024\u3092\u53d6\u5f97\u3059\u308b<\/li>\n\n\n\n<li>\u591a\u6b21\u5143\u914d\u5217\u3067\u306f\u6bb5\u968e\u7684\u306a\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046<\/li>\n\n\n\n<li>\u4f8b\u5916\u51e6\u7406\u3092\u9069\u5207\u306b\u7d44\u307f\u8fbc\u3080<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6700\u65b0\u6a5f\u80fd\u306e\u6d3b\u7528<\/strong>\n<ul class=\"wp-block-list\">\n<li>PHP 7\/8\u306e\u65b0\u6a5f\u80fd\uff08\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u3001null\u5408\u4f53\u6f14\u7b97\u5b50\u306a\u3069\uff09\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u3046<\/li>\n\n\n\n<li>\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u3063\u3066\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u7c21\u6f54\u306b\u66f8\u304f<\/li>\n\n\n\n<li>\u914d\u5217\u5c55\u958b\u69cb\u6587\u3092\u6d3b\u7528\u3057\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b<\/li>\n\n\n\n<li>\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\u3067\u578b\u306e\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-355\">\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306b\u3064\u3044\u3066\u3055\u3089\u306b\u5b66\u3076\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/strong>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.php.net\/manual\/ja\/language.types.array.php\">PHP \u30de\u30cb\u30e5\u30a2\u30eb: \u914d\u5217<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.php.net\/manual\/ja\/ref.array.php\">PHP \u30de\u30cb\u30e5\u30a2\u30eb: \u914d\u5217\u95a2\u6570<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/phptherightway.com\/\">PHP: \u6b63\u3057\u3044\u65b9\u6cd5<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u66f8\u7c4d<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u300cModern PHP\u300d\u8457\u8005\uff1aJosh Lockhart<\/li>\n\n\n\n<li>\u300cPHP Objects, Patterns, and Practice\u300d\u8457\u8005\uff1aMatt Zandstra<\/li>\n\n\n\n<li>\u300cPHP 7 Data Structures and Algorithms\u300d\u8457\u8005\uff1aMizanur Rahman<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30aa\u30f3\u30e9\u30a4\u30f3\u30ea\u30bd\u30fc\u30b9<\/strong>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/laracasts.com\/\">Laracasts<\/a> \u2013 PHP\u95a2\u9023\u306e\u512a\u308c\u305f\u30d3\u30c7\u30aa\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/li>\n\n\n\n<li><a href=\"https:\/\/symfonycasts.com\/\">SymfonyCasts<\/a> \u2013 PHP\u3068Symfony\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/li>\n\n\n\n<li><a href=\"https:\/\/phpdelusions.net\/\">PHP Delusions<\/a> \u2013 PHP\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u95a2\u3059\u308b\u8a18\u4e8b<\/li>\n\n\n\n<li><a href=\"https:\/\/phpthewrongway.com\/\">PHP The Wrong Way<\/a> \u2013 \u4e00\u822c\u7684\u306a\u9593\u9055\u3044\u3068\u305d\u306e\u5bfe\u7b56<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>GitHub \u30ea\u30dd\u30b8\u30c8\u30ea<\/strong>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/github.com\/TheAlgorithms\/PHP\">PHP Algorithms<\/a> \u2013 PHP\u3067\u5b9f\u88c5\u3055\u308c\u305f\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u30c7\u30fc\u30bf\u69cb\u9020<\/li>\n\n\n\n<li><a href=\"https:\/\/github.com\/ziadoz\/awesome-php\">Awesome PHP<\/a> \u2013 PHP\u30ea\u30bd\u30fc\u30b9\u306e\u30ad\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30ea\u30b9\u30c8<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-356\">\u4eca\u5f8c\u306e\u5b66\u7fd2\u65b9\u5411<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306b\u95a2\u3059\u308b\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u305f\u5f8c\u3001\u4ee5\u4e0b\u306e\u65b9\u5411\u306b\u5b66\u7fd2\u3092\u9032\u3081\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u3088\u308a\u9ad8\u5ea6\u306a\u30c7\u30fc\u30bf\u69cb\u9020<\/strong>\n<ul class=\"wp-block-list\">\n<li>SPL\uff08Standard PHP Library\uff09\u306e\u30c7\u30fc\u30bf\u69cb\u9020\uff08SplStack\u3001SplQueue\u3001SplHeap\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u3068\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30c7\u30fc\u30bf\u69cb\u9020\uff08Doctrine Collections\u306a\u3069\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u914d\u5217\u64cd\u4f5c\u624b\u6cd5<\/li>\n\n\n\n<li>\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3068\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u9ad8\u968e\u95a2\u6570\u306e\u6d3b\u7528\uff08currying\u3001partial application\u306a\u3069\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u3068\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\uff08Redis\u3001Memcached\u3068\u306e\u7d71\u5408\uff09<\/li>\n\n\n\n<li>\u5206\u6563\u30c7\u30fc\u30bf\u51e6\u7406\uff08ReactPHP\u3001Amp\uff09<\/li>\n\n\n\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u3068\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u9069\u7528<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3068\u914d\u5217\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\uff08TDD\uff09\u306b\u304a\u3051\u308b\u914d\u5217\u64cd\u4f5c\u306e\u30c6\u30b9\u30c8<\/li>\n\n\n\n<li>\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3068\u6700\u9069\u5316<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u3053\u3068\u306f\u3001\u5358\u306b\u6280\u8853\u7684\u306a\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u57fa\u76e4\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f\u6982\u5ff5\u3084\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u9069\u7528\u3057\u3001\u7d99\u7d9a\u7684\u306b\u5b66\u7fd2\u3068\u6539\u5584\u3092\u7d9a\u3051\u3066\u3044\u304f\u3053\u3068\u3067\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u3068\u3057\u3066\u306e\u30b9\u30ad\u30eb\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u914d\u5217\u306f\u3001\u3042\u3089\u3086\u308bPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u6838\u3092\u6210\u3059\u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u77e5\u8b58\u3092\u6d3b\u304b\u3057\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f55\u304b\u8cea\u554f\u3084\u7591\u554f\u304c\u3042\u308c\u3070\u3001\u305c\u3072\u30b3\u30e1\u30f3\u30c8\u6b04\u3067\u304a\u805e\u304b\u305b\u304f\u3060\u3055\u3044\u3002\u7686\u3055\u3093\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u65c5\u304c\u3055\u3089\u306b\u5b9f\u308a\u3042\u308b\u3082\u306e\u306b\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\u3002## \u307e\u3068\u3081<\/p>\n\n\n\n<p>PHP\u914d\u5217\u306f\u3001\u305d\u306e\u67d4\u8edf\u6027\u3068\u5f37\u529b\u306a\u6a5f\u80fd\u306b\u3088\u308a\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u4e2d\u5fc3\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001PHP\u306e\u914d\u5217\u306b\u95a2\u3059\u308b\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5e45\u5e83\u3044\u30c8\u30d4\u30c3\u30af\u3092\u7db2\u7f85\u3057\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u5b66\u3093\u3060\u77e5\u8b58\u3092\u6d3b\u304b\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306aPHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-357\">PHP\u914d\u5217\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u306e\u632f\u308a\u8fd4\u308a<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u306e\u57fa\u672c\u6982\u5ff5<\/strong>\n<ul class=\"wp-block-list\">\n<li>PHP\u306e\u914d\u5217\u306f\u5b9f\u969b\u306b\u306f\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u9806\u5e8f\u4ed8\u304d\u30de\u30c3\u30d7\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u3068\u9023\u60f3\u914d\u5217\u306e\u4e21\u65b9\u306e\u7279\u6027\u3092\u6301\u3061\u3001\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><code>array()<\/code>\u95a2\u6570\u3084\u77ed\u7e2e\u69cb\u6587<code>[]<\/code>\u3092\u4f7f\u3063\u3066\u4f5c\u6210\u3067\u304d\u3001PHP 5.4\u4ee5\u964d\u306f\u77ed\u7e2e\u69cb\u6587\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u914d\u5217\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306f\u9806\u5e8f\u304c\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u9023\u60f3\u914d\u5217\u306f\u540d\u524d\u4ed8\u304d\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u3064\u30c7\u30fc\u30bf\u306e\u8868\u73fe\u306b\u6700\u9069\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u591a\u6b21\u5143\u914d\u5217\u306f\u8907\u96d1\u306a\u968e\u5c64\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u9078\u629e\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6027\u8cea\u3001\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3001\u53ef\u8aad\u6027\u3001\u304a\u3088\u3073\u5c06\u6765\u306e\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u3066\u884c\u3046\u3079\u304d\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u8981\u7d20\u306e\u8ffd\u52a0\/\u524a\u9664\u306b\u306f<code>array_push()<\/code>\/<code>array_pop()<\/code>\u3084<code>array_shift()<\/code>\/<code>array_unshift()<\/code>\u304c\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u7d50\u5408\u306b\u306f<code>array_merge()<\/code>\u3084 PHP 7.4 \u4ee5\u964d\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50(<code>...<\/code>)\u304c\u4fbf\u5229\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u691c\u7d22\u3068\u62bd\u51fa\u306b\u306f<code>in_array()<\/code>\u3001<code>array_search()<\/code>\u3001<code>array_filter()<\/code>\u306a\u3069\u306e\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30bd\u30fc\u30c8\u306b\u306f\u69d8\u3005\u306a\u95a2\u6570\uff08<code>sort()<\/code>\u3001<code>asort()<\/code>\u3001<code>ksort()<\/code>\u3001<code>usort()<\/code>\u306a\u3069\uff09\u304c\u3042\u308a\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9078\u629e\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u5909\u63db\u3068\u52a0\u5de5\u306b\u306f<code>array_map()<\/code>\u3001<code>array_reduce()<\/code>\u3001<code>array_walk()<\/code>\u306a\u3069\u304c\u52b9\u679c\u7684\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\u306b\u306f<code>array_keys()<\/code>\u3001<code>array_values()<\/code>\u3001<code>array_flip()<\/code>\u306a\u3069\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u914d\u5217\u3068\u30eb\u30fc\u30d7\u51e6\u7406<\/strong>\n<ul class=\"wp-block-list\">\n<li><code>foreach<\/code>\u306f\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u6700\u3082\u8aad\u307f\u3084\u3059\u304f\u52b9\u7387\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u53c2\u7167\u6e21\u3057\uff08<code>&amp;<\/code>\uff09\u3092\u4f7f\u3046\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\u304c\u3001\u6ce8\u610f\u70b9\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30ea\u30b9\u30c8\u69cb\u6587\u3092\u4f7f\u3063\u305f\u591a\u91cd\u4ee3\u5165\u3067\u3001\u914d\u5217\u306e\u5024\u3092\u8907\u6570\u306e\u5909\u6570\u306b\u5206\u89e3\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u591a\u6b21\u5143\u914d\u5217\u306e\u64cd\u4f5c<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u591a\u6b21\u5143\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306b\u306f\u5b89\u5168\u306a\u65b9\u6cd5\uff08\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3084\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u30c4\u30ea\u30fc\u3001\u30b0\u30e9\u30d5\u3001\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306a\u3069\u306e\u5f62\u3067\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u306a\u591a\u6b21\u5143\u914d\u5217\u3067\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>PHP7\/8\u306e\u65b0\u6a5f\u80fd<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08<code>...<\/code>\uff09\u3092\u4f7f\u3063\u305f\u914d\u5217\u64cd\u4f5c\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/li>\n\n\n\n<li><code>array_key_first()<\/code>\u3068<code>array_key_last()<\/code>\u3067\u914d\u5217\u306e\u6700\u521d\u3068\u6700\u5f8c\u306e\u30ad\u30fc\u3092\u7c21\u5358\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>null\u5408\u4f53\u6f14\u7b97\u5b50\uff08<code>??<\/code>\uff09\u3092\u4f7f\u3063\u3066\u914d\u5217\u30a2\u30af\u30bb\u30b9\u3092\u5b89\u5168\u306b\u884c\u3048\u307e\u3059\u3002<\/li>\n\n\n\n<li>PHP 8\u3067\u306f\u30de\u30c3\u30c1\u5f0f\u3084Nullsafe\u6f14\u7b97\u5b50\u306a\u3069\u3001\u914d\u5217\u64cd\u4f5c\u3092\u7c21\u7565\u5316\u3059\u308b\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u64cd\u4f5c<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306f\u3001\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u52b9\u7387\u7684\u306b\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-358\">\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09Q&amp;A\uff1a\u3088\u304f\u3042\u308b\u914d\u5217\u306b\u95a2\u3059\u308b\u8cea\u554f<\/h2>\n\n\n\n<p>PHP\u914d\u5217\u306b\u3064\u3044\u3066\u3088\u304f\u5bc4\u305b\u3089\u308c\u308b\u8cea\u554f\u3068\u305d\u306e\u56de\u7b54\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3001PHP\u306e\u914d\u5217\u306b\u95a2\u3059\u308b\u7406\u89e3\u3092\u6df1\u3081\u308b\u306e\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-359\">\u300c\u914d\u5217\u3068\u9023\u60f3\u914d\u5217\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f\u300d<\/h3>\n\n\n\n<p>\u6280\u8853\u7684\u306b\u306f\u3001PHP\u306b\u304a\u3044\u3066\u300c\u914d\u5217\u300d\u3068\u300c\u9023\u60f3\u914d\u5217\u300d\u306f\u540c\u3058\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u7570\u306a\u308b\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u65b9\u6cd5\u3068\u6982\u5ff5\u306b\u306f\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-360\">\u57fa\u672c\u7684\u306a\u9055\u3044<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\uff08\u4e00\u822c\u7684\u306b\u300c\u914d\u5217\u300d\u3068\u547c\u3070\u308c\u308b\uff09\n$fruits = [\"apple\", \"banana\", \"cherry\"];\necho $fruits[0]; \/\/ \"apple\"\n\n\/\/ \u9023\u60f3\u914d\u5217\n$person = [\"name\" =&gt; \"John\", \"age\" =&gt; 30, \"city\" =&gt; \"New York\"];\necho $person[\"name\"]; \/\/ \"John\"\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-361\">\u30ad\u30fc\u306e\u7a2e\u985e\u3068\u5272\u308a\u5f53\u3066<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u30ad\u30fc\uff08\u901a\u5e38\u306f0\u304b\u3089\u59cb\u307e\u308b\u9023\u7d9a\u3057\u305f\u6574\u6570\uff09<\/li>\n\n\n\n<li>\u30ad\u30fc\u3092\u7701\u7565\u3059\u308b\u3068\u81ea\u52d5\u7684\u306b\u9023\u756a\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/li>\n\n\n\n<li>\u4e3b\u306b\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9023\u60f3\u914d\u5217<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u6587\u5b57\u5217\u307e\u305f\u306f\u6570\u5024\u3092\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528<\/li>\n\n\n\n<li>\u30ad\u30fc\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b<\/li>\n\n\n\n<li>\u30ad\u30fc\u306f\u4efb\u610f\u306e\u9806\u5e8f\u3067\u8ffd\u52a0\u3067\u304d\u3001\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u3092\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-362\">\u5185\u90e8\u5b9f\u88c5\u306e\u7d71\u4e00\u6027<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u4e21\u65b9\u306e\u30bf\u30a4\u30d7\u306f\u5185\u90e8\u7684\u306b\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u5b9f\u88c5\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8868\u9762\u4e0a\u306f\u7570\u306a\u308b\u6982\u5ff5\u306b\u898b\u3048\u3066\u3082\u3001\u540c\u3058\u914d\u5217\u306b\u4e21\u65b9\u306e\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$mixed = [0 =&gt; \"Zero\", \"one\" =&gt; \"One\", 1 =&gt; \"One (overwritten)\", \"two\" =&gt; \"Two\"];\nprint_r($mixed);\n\/*\nArray\n(\n    [0] =&gt; Zero\n    [one] =&gt; One\n    [1] =&gt; One (overwritten)\n    [two] =&gt; Two\n)\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-363\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4f7f\u7528\u30b7\u30ca\u30ea\u30aa<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\u306e\u9069\u7528\u4f8b<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u540c\u3058\u30bf\u30a4\u30d7\u306e\u8981\u7d20\u306e\u30ea\u30b9\u30c8\uff08\u540d\u524d\u306e\u30ea\u30b9\u30c8\u3001\u6570\u5024\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u9806\u5e8f\u304c\u91cd\u8981\u306a\u30c7\u30fc\u30bf<\/li>\n\n\n\n<li>\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3067\u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9023\u60f3\u914d\u5217\u306e\u9069\u7528\u4f8b<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u304c\u8ad6\u7406\u7684\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\uff08\u30e6\u30fc\u30b6\u30fc\u5c5e\u6027\u3001\u8a2d\u5b9a\u30aa\u30d7\u30b7\u30e7\u30f3\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u30ad\u30fc\u3067\u5024\u306b\u52b9\u7387\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/li>\n\n\n\n<li>JSON\u69cb\u9020\u3068\u306e\u30de\u30c3\u30d4\u30f3\u30b0<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-364\">\u4ed6\u306e\u8a00\u8a9e\u3068\u306e\u6bd4\u8f03<\/h4>\n\n\n\n<p>\u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u306f\u3001\u914d\u5217\uff08Array\uff09\u3068\u9023\u60f3\u914d\u5217\uff08Map\u3001Dictionary\u3001Hash \u306a\u3069\uff09\u306f\u7570\u306a\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u8a00\u8a9e      | \u914d\u5217            | \u9023\u60f3\u914d\u5217\n----------|----------------|-------------------\nPHP       | array()        | array() (\u540c\u3058)\nJavaScript| Array          | Object\/Map\nPython    | list           | dict\nJava      | ArrayList      | HashMap\nRuby      | Array          | Hash\n<\/pre>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u3053\u306e\u4e21\u65b9\u306e\u6a5f\u80fd\u30921\u3064\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001\u67d4\u8edf\u6027\u304c\u9ad8\u3044\u53cd\u9762\u3001\u4ed6\u306e\u8a00\u8a9e\u304b\u3089\u306e\u79fb\u884c\u6642\u306b\u6df7\u4e71\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-365\">\u300cPHP\u306e\u914d\u5217\u306f\u306a\u305c\u4ed6\u306e\u8a00\u8a9e\u3088\u308a\u67d4\u8edf\u306a\u306e\u3067\u3059\u304b\uff1f\u300d<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u3001\u5358\u4e00\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u4ed6\u306e\u8a00\u8a9e\u3067\u306f\u8907\u6570\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u5b9f\u73fe\u3055\u308c\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u67d4\u8edf\u6027\u306f\u3001PHP\u306e\u5b9f\u7528\u7684\u306a\u8a2d\u8a08\u601d\u60f3\u3092\u53cd\u6620\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-366\">\u57fa\u672c\u7684\u306a\u67d4\u8edf\u6027\u306e\u7279\u5fb4<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9806\u5e8f\u4ed8\u304d\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u306e\u5b9f\u88c5<\/strong> PHP\u306e\u914d\u5217\u306f\u5185\u90e8\u7684\u306b\u9806\u5e8f\u4ed8\u304d\u306e\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a:<ul><li>\u9ad8\u901f\u306a\u30ad\u30fc\u691c\u7d22 (O(1)\u306e\u6642\u9593\u8907\u96d1\u5ea6)<\/li><li>\u633f\u5165\u9806\u5e8f\u306e\u4fdd\u6301<\/li><li>\u6570\u5024\u30ad\u30fc\u3068\u6587\u5b57\u5217\u30ad\u30fc\u306e\u4e21\u65b9\u306e\u30b5\u30dd\u30fc\u30c8<\/li><\/ul><code>$array = []; $array[] = \"First\"; \/\/ \u6570\u5024\u30ad\u30fc 0 $array[\"key\"] = \"Second\"; \/\/ \u6587\u5b57\u5217\u30ad\u30fc \"key\" $array[] = \"Third\"; \/\/ \u6570\u5024\u30ad\u30fc 1 \/\/ \u633f\u5165\u9806\u5e8f\u304c\u7dad\u6301\u3055\u308c\u308b foreach ($array as $key =&gt; $value) { echo \"$key: $value\\n\"; } \/\/ \u51fa\u529b: \/\/ 0: First \/\/ key: Second \/\/ 1: Third<\/code><\/li>\n\n\n\n<li><strong>\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u306e\u6df7\u5728<\/strong> \u591a\u304f\u306e\u8a00\u8a9e\u306e\u914d\u5217\u306f\u540c\u3058\u578b\u306e\u8981\u7d20\u306e\u307f\u3092\u4fdd\u6301\u3067\u304d\u307e\u3059\u304c\u3001PHP\u306e\u914d\u5217\u306f\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <code>$mixed = [ \"text\" =&gt; \"Hello\", \"number\" =&gt; 42, \"boolean\" =&gt; true, \"array\" =&gt; [1, 2, 3], \"null\" =&gt; null, \"object\" =&gt; new stdClass() ];<\/code><\/li>\n\n\n\n<li><strong>\u52d5\u7684\u306a\u62e1\u5f35\u3068\u7e2e\u5c0f<\/strong> PHP\u306e\u914d\u5217\u306f\u3001\u8981\u7d20\u306e\u8ffd\u52a0\u3084\u524a\u9664\u306b\u5bfe\u3057\u3066\u52d5\u7684\u306b\u30b5\u30a4\u30ba\u3092\u8abf\u6574\u3057\u307e\u3059\u3002\u30e1\u30e2\u30ea\u306e\u4e8b\u524d\u5272\u308a\u5f53\u3066\u3084\u914d\u5217\u306e\u518d\u4f5c\u6210\u3092\u660e\u793a\u7684\u306b\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002 <code>$array = []; \/\/ \u52d5\u7684\u306a\u62e1\u5f35 for ($i = 0; $i &lt; 1000; $i++) { $array[] = $i; \/\/ \u30b5\u30a4\u30ba\u304c\u81ea\u52d5\u7684\u306b\u8abf\u6574\u3055\u308c\u308b } \/\/ \u52d5\u7684\u306a\u7e2e\u5c0f for ($i = 0; $i &lt; 500; $i++) { unset($array[$i]); \/\/ \u8981\u7d20\u3092\u524a\u9664\u3057\u3066\u3082\u81ea\u52d5\u7684\u306b\u8abf\u6574 }<\/code><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-367\">\u4ed6\u8a00\u8a9e\u3068\u306e\u5177\u4f53\u7684\u306a\u6bd4\u8f03<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Java\/C#\u3068\u306e\u6bd4\u8f03<\/strong> Java\/C#\u3067\u306f\u3001\u914d\u5217\u306f\u56fa\u5b9a\u30b5\u30a4\u30ba\u3067\u578b\u304c\u9650\u5b9a\u3055\u308c\u307e\u3059\u3002PHP\u306b\u76f8\u5f53\u3059\u308b\u6a5f\u80fd\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001<code>ArrayList<\/code>\u3068<code>HashMap<\/code>\/<code>Dictionary<\/code>\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <code>\/\/ Java \/\/ \u56fa\u5b9a\u30b5\u30a4\u30ba\u3001\u5358\u4e00\u578b String[] stringArray = new String[5]; \/\/ \u53ef\u5909\u30b5\u30a4\u30ba\u3001\u5358\u4e00\u578b ArrayList&lt;String&gt; arrayList = new ArrayList&lt;&gt;(); \/\/ \u30ad\u30fc\u30fb\u5024\u30da\u30a2 HashMap&lt;String, Object&gt; hashMap = new HashMap&lt;&gt;();<\/code><\/li>\n\n\n\n<li><strong>Python \u3068\u306e\u6bd4\u8f03<\/strong> Python\u3067\u306f\u3001PHP\u306e\u914d\u5217\u306e\u6a5f\u80fd\u306f<code>list<\/code>\u3068<code>dict<\/code>\u306b\u5206\u304b\u308c\u3066\u3044\u307e\u3059\u3002 <code># Python # \u30ea\u30b9\u30c8\uff08\u9806\u5e8f\u4ed8\u304d\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff09 my_list = [\"apple\", \"banana\", \"cherry\"] # \u8f9e\u66f8\uff08\u30ad\u30fc\u30fb\u5024\u30da\u30a2\uff09 my_dict = {\"name\": \"John\", \"age\": 30}<\/code><\/li>\n\n\n\n<li><strong>JavaScript \u3068\u306e\u6bd4\u8f03<\/strong> JavaScript \u3067\u306f\u914d\u5217\uff08Array\uff09\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08Object\/Map\uff09\u304c\u5206\u96e2\u3055\u308c\u3066\u3044\u307e\u3059\u3002ES6\u4ee5\u964d\u306e<code>Map<\/code>\u306f\u9806\u5e8f\u3092\u4fdd\u6301\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u4ee5\u524d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u9806\u5e8f\u3092\u4fdd\u8a3c\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002 <code>\/\/ JavaScript \/\/ \u914d\u5217 let fruits = [\"apple\", \"banana\", \"cherry\"]; \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u9023\u60f3\u914d\u5217\u7684\u306b\u4f7f\u7528\uff09 let person = {name: \"John\", age: 30}; \/\/ ES6\u306eMap\uff08\u9806\u5e8f\u3092\u4fdd\u6301\uff09 let userMap = new Map(); userMap.set(\"name\", \"John\"); userMap.set(\"age\", 30);<\/code><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-368\">\u67d4\u8edf\u6027\u306e\u5229\u70b9\u3068\u6b20\u70b9<\/h4>\n\n\n\n<p><strong>\u5229\u70b9:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u8907\u6570\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u7570\u306a\u308b\u30c7\u30fc\u30bf\u8868\u73fe\u9593\u306e\u5909\u63db\u304c\u5bb9\u6613<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u304c\u7c21\u6f54\u306b\u306a\u308b<\/li>\n\n\n\n<li>API\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u7d50\u679c\u3092\u76f4\u63a5\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3084\u3059\u3044<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6b20\u70b9:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30bf\u30a4\u30d7\u30bb\u30fc\u30d5\u30c6\u30a3\u304c\u4f4e\u304f\u306a\u308b<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u7279\u5316\u3057\u305f\u6700\u9069\u5316\u304c\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u76ee\u7684\u304c\u4e0d\u660e\u78ba\u306b\u306a\u308a\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u4ed6\u306e\u8a00\u8a9e\u306e\u5c02\u7528\u30c7\u30fc\u30bf\u69cb\u9020\u3088\u308a\u591a\u3044\u5834\u5408\u304c\u3042\u308b<\/li>\n<\/ul>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306e\u67d4\u8edf\u6027\u306f\u3001\u8fc5\u901f\u306a\u958b\u767a\u3068\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u64cd\u4f5c\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3048\u308b\u5b9f\u7528\u7684\u306a\u8a2d\u8a08\u306e\u7d50\u679c\u3067\u3059\u3002\u3053\u308c\u306f\u300cSwiss Army Knife\uff08\u4e07\u80fd\u30ca\u30a4\u30d5\uff09\u300d\u306e\u3088\u3046\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3001PHP\u306e\u4eba\u6c17\u306e\u4e00\u56e0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-369\">\u300c\u914d\u5217\u3068\u4ed6\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u3069\u3046\u4f7f\u3044\u5206\u3051\u308b\u3079\u304d\u3067\u3059\u304b\uff1f\u300d<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u9078\u629e\u306f\u3001\u64cd\u4f5c\u306e\u7a2e\u985e\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u3001\u30b3\u30fc\u30c9\u306e\u660e\u78ba\u3055\u306a\u3069\u3001\u69d8\u3005\u306a\u8981\u56e0\u306b\u57fa\u3065\u3044\u3066\u884c\u3046\u3079\u304d\u3067\u3059\u3002PHP\u306b\u304a\u3044\u3066\u914d\u5217\u306f\u975e\u5e38\u306b\u6c4e\u7528\u7684\u3067\u3059\u304c\u3001\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306f\u3088\u308a\u7279\u5316\u3057\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u65b9\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-370\">\u914d\u5217\u3068\u4ed6\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u6bd4\u8f03<\/h4>\n\n\n<div id=\"id-33d12299-a274-4770-a25e-997678139cbb\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30c7\u30fc\u30bf\u69cb\u9020<\/th><th>\u9577\u6240<\/th><th>\u77ed\u6240<\/th><th>\u6700\u9069\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u914d\u5217\uff08Array\uff09<\/td><td>\u6c4e\u7528\u7684\u3001\u67d4\u8edf\u3001\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u304c\u591a\u3044<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u591a\u3044\u5834\u5408\u304c\u3042\u308b\u3001\u7279\u5b9a\u64cd\u4f5c\u304c\u975e\u52b9\u7387<\/td><td>\u6c4e\u7528\u7684\u306a\u30c7\u30fc\u30bf\u53ce\u96c6\u3001\u4e2d\u5c0f\u898f\u6a21\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8<\/td><\/tr><tr><td>SplDoublyLinkedList<\/td><td>\u5148\u982d\/\u672b\u5c3e\u3078\u306e\u633f\u5165\u30fb\u524a\u9664\u304cO(1)<\/td><td>\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u304c\u9045\u3044<\/td><td>\u30ad\u30e5\u30fc\u3084\u30b9\u30bf\u30c3\u30af\u306e\u5b9f\u88c5<\/td><\/tr><tr><td>SplHeap<\/td><td>\u5e38\u306b\u6700\u5c0f\/\u6700\u5927\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/td><td>\u633f\u5165\u6642\u306b\u518d\u69cb\u6210\u304c\u5fc5\u8981<\/td><td>\u512a\u5148\u5ea6\u30ad\u30e5\u30fc\u3001\u30c8\u30c3\u30d7N\u8981\u7d20\u306e\u53d6\u5f97<\/td><\/tr><tr><td>SplFixedArray<\/td><td>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u307f\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u3044<\/td><td>\u30b5\u30a4\u30ba\u56fa\u5b9a\u3001\u9023\u60f3\u30ad\u30fc\u4e0d\u53ef<\/td><td>\u5927\u91cf\u306e\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8981\u7d20<\/td><\/tr><tr><td>SplObjectStorage<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u53ef\u80fd<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5c02\u7528<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9593\u306e\u95a2\u9023\u4ed8\u3051<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-371\">\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u5225\u306e\u9078\u629e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>FIFO\uff08\u5148\u5165\u308c\u5148\u51fa\u3057\uff09\u30ad\u30e5\u30fc\u304c\u5fc5\u8981\u306a\u5834\u5408<\/strong> \u901a\u5e38\u306e\u914d\u5217\u3067<code>array_push()<\/code>\u3068<code>array_shift()<\/code>\u3092\u4f7f\u3046\u3088\u308a\u3082\u3001<code>SplQueue<\/code>\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u52b9\u7387\u7684\u3067\u3059\u3002 <code>\/\/ \u6a19\u6e96\u914d\u5217\u306b\u3088\u308b\u30ad\u30e5\u30fc\uff08\u975e\u52b9\u7387\uff09 $queue = []; array_push($queue, \"item1\"); $item = array_shift($queue); \/\/ \u5168\u8981\u7d20\u3092\u518d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316 \/\/ \u5c02\u7528\u30c7\u30fc\u30bf\u69cb\u9020\uff08\u52b9\u7387\u7684\uff09 $queue = new SplQueue(); $queue-&gt;enqueue(\"item1\"); $item = $queue-&gt;dequeue(); \/\/ O(1)\u306e\u64cd\u4f5c<\/code><\/li>\n\n\n\n<li><strong>LIFO\uff08\u5f8c\u5165\u308c\u5148\u51fa\u3057\uff09\u30b9\u30bf\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408<\/strong> \u914d\u5217\u3067\u306e<code>array_push()<\/code>\u3068<code>array_pop()<\/code>\u306f\u304b\u306a\u308a\u52b9\u7387\u7684\u3067\u3059\u304c\u3001<code>SplStack<\/code>\u306f\u3088\u308a\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002 <code>\/\/ \u6a19\u6e96\u914d\u5217\u306b\u3088\u308b\u30b9\u30bf\u30c3\u30af\uff08\u52b9\u7387\u7684\uff09 $stack = []; array_push($stack, \"item1\"); $item = array_pop($stack); \/\/ O(1)\u306e\u64cd\u4f5c \/\/ \u5c02\u7528\u30c7\u30fc\u30bf\u69cb\u9020\uff08\u610f\u56f3\u304c\u660e\u78ba\uff09 $stack = new SplStack(); $stack-&gt;push(\"item1\"); $item = $stack-&gt;pop();<\/code><\/li>\n\n\n\n<li><strong>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408<\/strong> \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3067\u306f\u3001\u5c02\u7528\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3059\u3079\u304d\u3067\u3059\u3002 <code>\/\/ \u30e1\u30e2\u30ea\u3092\u5927\u91cf\u306b\u4f7f\u7528 $largeArray = range(1, 1000000); \/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u56fa\u5b9a\u914d\u5217 $largeArray = new SplFixedArray(1000000); \/\/ \u3055\u3089\u306b\u52b9\u7387\u7684\u306a\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf function rangeGenerator($start, $end) { for ($i = $start; $i &lt;= $end; $i++) { yield $i; } } foreach (rangeGenerator(1, 1000000) as $number) { \/\/ \u5404\u5024\u30921\u3064\u305a\u3064\u51e6\u7406 }<\/code><\/li>\n\n\n\n<li><strong>\u8981\u7d20\u306e\u983b\u7e41\u306a\u633f\u5165\u3068\u524a\u9664\u304c\u5fc5\u8981\u306a\u5834\u5408<\/strong> \u914d\u5217\u306e\u4e2d\u592e\u3067\u306e\u8981\u7d20\u306e\u633f\u5165\u30fb\u524a\u9664\u306f\u975e\u52b9\u7387\u7684\u3067\u3059\u3002\u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u306e\u65b9\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002 <code>\/\/ \u914d\u5217\u306e\u4e2d\u592e\u306b\u633f\u5165\uff08\u975e\u52b9\u7387\uff09 array_splice($array, $position, 0, $newItem); \/\/ O(n) \/\/ \u30ea\u30f3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\uff08\u52b9\u7387\u7684\uff09 $list = new SplDoublyLinkedList(); \/\/ ... \u30ea\u30b9\u30c8\u306b\u8981\u7d20\u3092\u8ffd\u52a0 ... $iterator = $list-&gt;getIterator(); $iterator-&gt;seek($position); $list-&gt;add($iterator-&gt;key(), $newItem); \/\/ O(1)<\/code><\/li>\n\n\n\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong> \u6a19\u6e96\u914d\u5217\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ad\u30fc\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002<code>SplObjectStorage<\/code>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 <code>$obj1 = new stdClass(); $obj2 = new stdClass(); \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30c8\u30ec\u30fc\u30b8 $storage = new SplObjectStorage(); $storage[$obj1] = \"\u30c7\u30fc\u30bf1\"; $storage[$obj2] = \"\u30c7\u30fc\u30bf2\"; echo $storage[$obj1]; \/\/ \"\u30c7\u30fc\u30bf1\"<\/code><\/li>\n\n\n\n<li><strong>\u691c\u7d22\u304c\u983b\u7e41\u306b\u5fc5\u8981\u306a\u5834\u5408<\/strong> \u691c\u7d22\u304c\u4e3b\u306a\u64cd\u4f5c\u306e\u5834\u5408\u3001\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u306e\u7279\u6027\u3092\u6301\u3064\u6a19\u6e96\u306e\u9023\u60f3\u914d\u5217\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002 <code>$userData = [ \"user123\" =&gt; [\"name\" =&gt; \"John\", \"email\" =&gt; \"john@example.com\"], \"user456\" =&gt; [\"name\" =&gt; \"Jane\", \"email\" =&gt; \"jane@example.com\"] ]; \/\/ O(1)\u3067\u306e\u30eb\u30c3\u30af\u30a2\u30c3\u30d7 $user = $userData[\"user123\"];<\/code><\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-372\">\u9078\u629e\u306e\u57fa\u6e96<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u9078\u3076\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u57fa\u6e96\u3092\u8003\u616e\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u64cd\u4f5c\u306e\u7a2e\u985e\u3068\u983b\u5ea6<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4e3b\u306b\u8ffd\u52a0\/\u524a\u9664\u304c\u591a\u3044\u306e\u304b\u3001\u691c\u7d22\u304c\u591a\u3044\u306e\u304b<\/li>\n\n\n\n<li>\u9806\u5e8f\u306e\u7dad\u6301\u304c\u91cd\u8981\u304b<\/li>\n\n\n\n<li>\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\u304b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u30b5\u30a4\u30ba<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5c0f\u898f\u6a21\u306a\u3089\u30b7\u30f3\u30d7\u30eb\u3055\u3092\u512a\u5148<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u306a\u3089\u30e1\u30e2\u30ea\u3068\u52b9\u7387\u3092\u512a\u5148<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u660e\u78ba\u3055<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u76ee\u7684\u304c\u660e\u78ba\u306b\u4f1d\u308f\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u9078\u3076<\/li>\n\n\n\n<li>\u6c4e\u7528\u914d\u5217\u3067\u306f\u610f\u56f3\u304c\u4e0d\u660e\u78ba\u306b\u306a\u308b\u3053\u3068\u3082\u3042\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5c06\u6765\u306e\u8981\u4ef6<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u62e1\u5f35\u6027\u3068\u4fdd\u5b88\u6027\u3092\u8003\u616e<\/li>\n\n\n\n<li>\u8981\u4ef6\u306e\u5909\u66f4\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u67d4\u8edf\u6027<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>PHP\u306e\u6a19\u6e96\u914d\u5217\u306f\u975e\u5e38\u306b\u6c4e\u7528\u7684\u3067\u3001\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u5341\u5206\u3067\u3059\u304c\u3001\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306f\u5c02\u7528\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b3\u30fc\u30c9\u306e\u660e\u78ba\u3055\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002SPL\uff08Standard PHP Library\uff09\u304c\u63d0\u4f9b\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u6d3b\u7528\u3057\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":{"0":"post-3421","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-php","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3421"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3421\/revisions"}],"predecessor-version":[{"id":3422,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3421\/revisions\/3422"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}