{"id":3438,"date":"2025-03-24T08:46:11","date_gmt":"2025-03-23T23:46:11","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3438"},"modified":"2025-03-24T08:46:41","modified_gmt":"2025-03-23T23:46:41","slug":"php%e9%85%8d%e5%88%97%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89-20%e3%81%ae%e5%ae%9f%e7%94%a8%e3%83%86%e3%82%af%e3%83%8b%e3%83%83%e3%82%af%e3%81%a8%e6%9c%80%e9%81%a9%e5%8c%96%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3438","title":{"rendered":"PHP\u914d\u5217\u5b8c\u5168\u30ac\u30a4\u30c9: 20+\u306e\u5b9f\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3068\u6700\u9069\u5316\u65b9\u6cd5\u30102025\u5e74\u6700\u65b0\u3011"},"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\">PHP\u914d\u5217\u3068\u306f\uff1f\u57fa\u672c\u6982\u5ff5\u3068\u91cd\u8981\u6027<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">PHP\u914d\u5217\u304c\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u914d\u5217\u3068\u7570\u306a\u308b5\u3064\u306e\u7279\u5fb4<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u5185\u90e8\u5b9f\u88c5\u3068\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u69cb\u9020<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">PHP\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c\u30de\u30b9\u30bf\u30fc\u30ac\u30a4\u30c9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u914d\u5217\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316\uff1a\u6700\u3082\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u64cd\u4f5c\uff1a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u679c\u7684\u306a\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-19\">PHP\u306e\u914d\u5217\u95a2\u6570\u5fb9\u5e95\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">\u914d\u5217\u64cd\u4f5c\u306b\u5fc5\u9808\u306e10\u500b\u306e\u30d3\u30eb\u30c8\u30a4\u30f3\u95a2\u6570<\/a>      <\/li>      <li>        <a href=\"#i-31\">\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff1a\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-34\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u914d\u5217\u95a2\u6570\u306e\u9078\u3073\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-39\">PHP\u914d\u5217\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-40\">\u5927\u898f\u6a21\u914d\u5217\u51e6\u7406\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-46\">\u5b9f\u884c\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-50\">\u914d\u5217\u64cd\u4f5c\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3068\u6700\u9069\u5316\u4e8b\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-55\">PHP\u914d\u5217\u306e\u5b9f\u8df5\u7684\u5fdc\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-56\">JSON\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3051\u308b\u914d\u5217\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-60\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u5909\u63db\u3068\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-63\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u914d\u5217\u3067\u52b9\u679c\u7684\u306b\u6271\u3046\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-67\">PHP\u914d\u5217\u306b\u95a2\u3059\u308b\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-68\">\u914d\u5217\u64cd\u4f5c\u6642\u306e\u5178\u578b\u7684\u306a\u30a8\u30e9\u30fc\u3068\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-74\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u914d\u5217\u4f7f\u7528\u306e\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-79\">\u914d\u5217\u51e6\u7406\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-85\">\u6700\u65b0PHP\uff08PHP 8.x\uff09\u3067\u306e\u914d\u5217\u6a5f\u80fd\u5f37\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-86\">PHP 8.x\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u3057\u3044\u914d\u5217\u64cd\u4f5c\u6a5f\u80fd<\/a>      <\/li>      <li>        <a href=\"#i-101\">\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u914d\u5217\u64cd\u4f5c\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u7c21\u6f54\u306a\u30b3\u30fc\u30c9\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-105\">\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u914d\u5217\u51e6\u7406\u306e\u6700\u9069\u5316\u624b\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-111\">PHP\u914d\u5217\u6d3b\u7528\u306e\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-112\">\u914d\u5217\u64cd\u4f5c\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-116\">\u5b9f\u52d9\u3067\u5373\u5f79\u7acb\u3064PHP\u914d\u5217\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-121\">\u3088\u308a\u9ad8\u5ea6\u306a\u914d\u5217\u51e6\u7406\u3078\u306e\u30b9\u30c6\u30c3\u30d7\u30a2\u30c3\u30d7\u30ac\u30a4\u30c9<\/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\">PHP\u914d\u5217\u3068\u306f\uff1f\u57fa\u672c\u6982\u5ff5\u3068\u91cd\u8981\u6027<\/h2>\n\n\n\n<p>PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306f\u3001\u5358\u306a\u308b\u30c7\u30fc\u30bf\u306e\u96c6\u5408\u4ee5\u4e0a\u306e\u3082\u306e\u3067\u3059\u3002PHP\u914d\u5217\u306f\u3001<strong>\u9806\u5e8f\u4ed8\u3051\u3089\u308c\u305f\u30de\u30c3\u30d7<\/strong>\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u5024\u3092\u30ad\u30fc\u306b\u95a2\u9023\u4ed8\u3051\u308b\u6975\u3081\u3066\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u7279\u6027\u306b\u3088\u308a\u3001PHP\u306e\u914d\u5217\u306f\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u6bd4\u8f03\u3057\u3066\u72ec\u7279\u304b\u3064\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u914d\u5217\u306fPHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u6700\u3082\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3042\u308a\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u304b\u3089\u30c7\u30fc\u30bf\u51e6\u7406\u3001API\u3068\u306e\u9023\u643a\u307e\u3067\u3001\u3042\u3089\u3086\u308b\u5834\u9762\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\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\u914d\u5217\u306e\u5ba3\u8a00\n$fruits = ['apple', 'banana', 'orange'];\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u5ba3\u8a00\n$person = [\n    'name' =&gt; '\u5c71\u7530\u592a\u90ce',\n    'age' =&gt; 30,\n    'skills' =&gt; ['PHP', 'MySQL', 'JavaScript']\n];\n\necho $fruits[1]; \/\/ \u51fa\u529b: banana\necho $person['name']; \/\/ \u51fa\u529b: \u5c71\u7530\u592a\u90ce\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">PHP\u914d\u5217\u304c\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u914d\u5217\u3068\u7570\u306a\u308b5\u3064\u306e\u7279\u5fb4<\/h3>\n\n\n\n<p>PHP\u914d\u5217\u306f\u4ed6\u306e\u8a00\u8a9e\u306e\u914d\u5217\u3068\u306f\u4e00\u7dda\u3092\u753b\u3059\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u679c\u7684\u306b\u914d\u5217\u3092\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-3ca6d107-2576-483d-923f-b36156031332\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>\u8aac\u660e<\/th><th>\u4ed6\u8a00\u8a9e\u3068\u306e\u6bd4\u8f03<\/th><\/tr><\/thead><tbody><tr><td><strong>1. \u8907\u5408\u578b<\/strong><\/td><td>\u7570\u306a\u308b\u578b\u306e\u30c7\u30fc\u30bf\u3092\u540c\u4e00\u914d\u5217\u5185\u306b\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/td><td>Java\u3001C++\u306a\u3069\u3067\u306f\u540c\u4e00\u306e\u578b\u306e\u307f\u683c\u7d0d\u53ef\u80fd<\/td><\/tr><tr><td><strong>2. \u52d5\u7684\u30b5\u30a4\u30ba<\/strong><\/td><td>\u30b5\u30a4\u30ba\u3092\u4e8b\u524d\u306b\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u3001\u52d5\u7684\u306b\u62e1\u5f35\u53ef\u80fd<\/td><td>C\u8a00\u8a9e\u3067\u306f\u56fa\u5b9a\u30b5\u30a4\u30ba\u306e\u914d\u5217\u5ba3\u8a00\u304c\u5fc5\u8981<\/td><\/tr><tr><td><strong>3. \u9023\u60f3\u914d\u5217\u6a5f\u80fd<\/strong><\/td><td>\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3060\u3051\u3067\u306a\u304f\u6587\u5b57\u5217\u30ad\u30fc\u3082\u4f7f\u7528\u53ef\u80fd<\/td><td>\u591a\u304f\u306e\u8a00\u8a9e\u3067\u306f\u5225\u30c7\u30fc\u30bf\u69cb\u9020(Dictionary, Map\u7b49)\u3067\u5b9f\u88c5<\/td><\/tr><tr><td><strong>4. \u81ea\u52d5\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/strong><\/td><td>\u660e\u793a\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3082\u81ea\u52d5\u7684\u306b\u5272\u308a\u5f53\u3066<\/td><td>\u591a\u304f\u306e\u8a00\u8a9e\u3067\u306f\u660e\u793a\u7684\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7ba1\u7406\u304c\u5fc5\u8981<\/td><\/tr><tr><td><strong>5. \u53c2\u7167\u6e21\u3057\u53ef\u80fd<\/strong><\/td><td>\u5927\u304d\u306a\u914d\u5217\u3067\u3082\u53c2\u7167\u6e21\u3057\u306b\u3088\u3063\u3066\u52b9\u7387\u7684\u306b\u6271\u3048\u308b<\/td><td>\u8a00\u8a9e\u306b\u3088\u3063\u3066\u306f\u5024\u6e21\u3057\u3092\u57fa\u672c\u3068\u3057\u3066\u3044\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u7279\u306b\u91cd\u8981\u306a\u306e\u306f\u9023\u60f3\u914d\u5217\u306e\u6a5f\u80fd\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3092\u76f4\u611f\u7684\u306b\u7ba1\u7406\u3067\u304d\u3001\u540d\u524d\u4ed8\u304d\u306e\u30c7\u30fc\u30bf\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u306b\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=\"\">\/\/ \u4ed6\u8a00\u8a9e\u3067\u306f2\u3064\u306e\u5225\u3005\u306e\u69cb\u9020\u304c\u5fc5\u8981\u306a\u5834\u5408\u3082\u3001PHP\u3067\u306f1\u3064\u306e\u914d\u5217\u3067\u5bfe\u5fdc\u53ef\u80fd\n$mixed_array = [\n    0 =&gt; 'First item',  \/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\n    'name' =&gt; 'John',   \/\/ \u6587\u5b57\u5217\u30ad\u30fc\n    1 =&gt; 42,            \/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08\u7d9a\u304d\uff09\n    'is_active' =&gt; true \/\/ \u6587\u5b57\u5217\u30ad\u30fc\n];\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306e\u5185\u90e8\u5b9f\u88c5\u3068\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u69cb\u9020<\/h3>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u5185\u90e8\u7684\u306b\u306f<strong>\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb<\/strong>\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30ad\u30fc\u3092\u30cf\u30c3\u30b7\u30e5\u5024\u306b\u5909\u63db\u3057\u3001\u305d\u306e\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u3082\u3068\u306b\u5024\u3092\u683c\u7d0d\u30fb\u53d6\u5f97\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u5927\u898f\u6a21\u306a\u914d\u5217\u3067\u3082\u9ad8\u901f\u306b\u30c7\u30fc\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/claude.ai\/chat\/%E5%9B%B3%E8%A1%A8%EF%BC%9A%E3%83%8F%E3%83%83%E3%82%B7%E3%83%A5%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E6%A7%8B%E9%80%A0%E3%81%AE%E3%82%A4%E3%83%A1%E3%83%BC%E3%82%B8%E5%9B%B3\" alt=\"PHP\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u69cb\u9020\"><\/figure>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u6d41\u308c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ad\u30fc\u3092\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306b\u901a\u3057\u3066\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u751f\u6210<\/li>\n\n\n\n<li>\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u3082\u3068\u306b\u914d\u5217\u5185\u306e\u4f4d\u7f6e\uff08\u30d0\u30b1\u30c3\u30c8\uff09\u3092\u6c7a\u5b9a<\/li>\n\n\n\n<li>\u8a72\u5f53\u306e\u30d0\u30b1\u30c3\u30c8\u306b\u5024\u3092\u683c\u7d0d\u307e\u305f\u306f\u53d6\u5f97<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u306e\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u69cb\u9020\u304cPHP\u914d\u5217\u306e\u7279\u5fb4\u3067\u3042\u308b\u9ad8\u901f\u306a\u30ad\u30fc\u30fb\u30d0\u30ea\u30e5\u30fc\u30a2\u30af\u30bb\u30b9\u3092\u5b9f\u73fe\u3057\u3066\u3044\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=\"\">\/\/ \u5185\u90e8\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u51e6\u7406\u304c\u884c\u308f\u308c\u3066\u3044\u308b\uff08\u6982\u5ff5\u7684\u306a\u4f8b\uff09\n$key = 'name';\n$hash_value = hash_function($key); \/\/ \u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3067\u30ad\u30fc\u3092\u5909\u63db\n$bucket_index = $hash_value % bucket_size; \/\/ \u30d0\u30b1\u30c3\u30c8\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u7b97\u51fa\n$value = bucket[$bucket_index]; \/\/ \u5bfe\u5fdc\u3059\u308b\u5024\u306b\u30a2\u30af\u30bb\u30b9\n<\/pre>\n\n\n\n<p>PHP\u306e\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u5b9f\u88c5\u306b\u306f\u3001<strong>\u885d\u7a81\u89e3\u6c7a<\/strong>\u306e\u4ed5\u7d44\u307f\u3082\u5099\u308f\u3063\u3066\u3044\u307e\u3059\u3002\u7570\u306a\u308b\u30ad\u30fc\u304c\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u751f\u6210\u3057\u305f\u5834\u5408\uff08\u30cf\u30c3\u30b7\u30e5\u885d\u7a81\uff09\u3001\u30c1\u30a7\u30a4\u30f3\u6cd5\u3092\u4f7f\u3063\u3066\u89e3\u6c7a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u3069\u3093\u306a\u30ad\u30fc\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u3082\u6b63\u3057\u304f\u5024\u3092\u683c\u7d0d\u30fb\u53d6\u5f97\u3067\u304d\u308b\u5805\u7262\u6027\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u914d\u5217\u306e\u5185\u90e8\u69cb\u9020\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/strong>: \u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u304c\u53ef\u80fd<\/li>\n\n\n\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u4e88\u6e2c<\/strong>: \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306e\u6319\u52d5\u306e\u4e88\u6e2c<\/li>\n\n\n\n<li><strong>\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u9078\u629e<\/strong>: \u9069\u5207\u306a\u914d\u5217\u64cd\u4f5c\u65b9\u6cd5\u306e\u9078\u629e<\/li>\n<\/ul>\n\n\n\n<p>\u591a\u304f\u306e\u958b\u767a\u8005\u306fPHP\u914d\u5217\u306e\u5185\u90e8\u5b9f\u88c5\u306b\u3064\u3044\u3066\u6df1\u304f\u8003\u3048\u305a\u306b\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u304b\u3064\u6700\u9069\u5316\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">PHP\u914d\u5217\u306e\u57fa\u672c\u64cd\u4f5c\u30de\u30b9\u30bf\u30fc\u30ac\u30a4\u30c9<\/h2>\n\n\n\n<p>PHP\u914d\u5217\u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u5f37\u529b\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3067\u3059\u304c\u3001\u305d\u306e\u771f\u4fa1\u3092\u767a\u63ee\u3059\u308b\u306b\u306f\u57fa\u672c\u64cd\u4f5c\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8eab\u306b\u3064\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u914d\u5217\u306e\u4f5c\u6210\u304b\u3089\u9ad8\u5ea6\u306a\u64cd\u4f5c\u307e\u3067\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u914d\u5217\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316\uff1a\u6700\u3082\u52b9\u7387\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u8907\u6570\u306e\u65b9\u6cd5\u3067\u914d\u5217\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u304c\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u3076\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-5\">1. \u77ed\u7e2e\u69cb\u6587\uff08\u63a8\u5968\uff09<\/h4>\n\n\n\n<p>PHP 5.4\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u89d2\u62ec\u5f27\u3092\u4f7f\u3046\u69cb\u6587\u306f\u3001\u6700\u3082\u7c21\u6f54\u3067\u53ef\u8aad\u6027\u3082\u9ad8\u3044\u305f\u3081\u3001\u73fe\u4ee3\u306ePHP\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u306f\u6a19\u6e96\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$fruits = ['apple', 'banana', 'orange'];\n\n\/\/ \u9023\u60f3\u914d\u5217\n$user = [\n    'id' =&gt; 1,\n    'name' =&gt; '\u7530\u4e2d\u4e00\u90ce',\n    'email' =&gt; 'tanaka@example.com'\n];\n\n\/\/ \u7a7a\u306e\u914d\u5217\u306e\u521d\u671f\u5316\n$empty_array = [];\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">2. array()\u95a2\u6570<\/h4>\n\n\n\n<p>PHP 5.4\u3088\u308a\u524d\u304b\u3089\u3042\u308b\u4f1d\u7d71\u7684\u306a\u65b9\u6cd5\u3067\u3001\u53e4\u3044\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3067\u306f\u3053\u306e\u5f62\u5f0f\u3092\u3088\u304f\u898b\u304b\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$fruits = array('apple', 'banana', 'orange');\n\n\/\/ \u9023\u60f3\u914d\u5217\n$user = array(\n    'id' =&gt; 1,\n    'name' =&gt; '\u7530\u4e2d\u4e00\u90ce',\n    'email' =&gt; 'tanaka@example.com'\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-7\">3. \u8981\u7d20\u3092\u500b\u5225\u306b\u8ffd\u52a0<\/h4>\n\n\n\n<p>\u5b9f\u884c\u6642\u306b\u52d5\u7684\u306b\u914d\u5217\u3092\u69cb\u7bc9\u3059\u308b\u5834\u5408\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=\"\">\/\/ \u7a7a\u306e\u914d\u5217\u304b\u3089\u958b\u59cb\n$cart = [];\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u64cd\u4f5c\u306a\u3069\u306b\u57fa\u3065\u3044\u3066\u8981\u7d20\u3092\u8ffd\u52a0\n$cart[] = 'product1'; \/\/ \u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b90\u306b\u914d\u7f6e\n$cart[] = 'product2'; \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u306b\u914d\u7f6e\n$cart['tax_rate'] = 0.1; \/\/ \u9023\u60f3\u30ad\u30fc\u306e\u8ffd\u52a0\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">4. \u914d\u5217\u751f\u6210\u95a2\u6570\u3092\u6d3b\u7528<\/h4>\n\n\n\n<p>\u7279\u5b9a\u306e\u30d1\u30bf\u30fc\u30f3\u3084\u7bc4\u56f2\u306e\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\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=\"\">\/\/ \u7bc4\u56f2\u914d\u5217\u306e\u751f\u6210\n$numbers = range(1, 10); \/\/ [1, 2, 3, ... 10]\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u304b\u3089\u914d\u5217\u3092\u4f5c\u6210\n$keys = ['name', 'age', 'city'];\n$values = ['\u4f50\u85e4', 28, '\u6771\u4eac'];\n$person = array_combine($keys, $values);\n\/\/ \u7d50\u679c: ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 28, 'city' =&gt; '\u6771\u4eac']\n\n\/\/ \u56fa\u5b9a\u5024\u3067\u6e80\u305f\u3055\u308c\u305f\u914d\u5217\u306e\u4f5c\u6210\n$zeros = array_fill(0, 5, 0); \/\/ [0, 0, 0, 0, 0]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u64cd\u4f5c\uff1a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u914d\u5217\u8981\u7d20\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c\u306f\u3001\u30af\u30ea\u30fc\u30f3\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u9375\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30a2\u30af\u30bb\u30b9\n$fruits = ['apple', 'banana', 'orange'];\necho $fruits[1]; \/\/ \u51fa\u529b: banana\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u30a2\u30af\u30bb\u30b9\n$user = ['name' =&gt; '\u5c71\u7530', 'age' =&gt; 30];\necho $user['name']; \/\/ \u51fa\u529b: \u5c71\u7530\n\n\/\/ \u5b58\u5728\u78ba\u8a8d\u3092\u3057\u3066\u304b\u3089\u30a2\u30af\u30bb\u30b9\uff08\u63a8\u5968\uff09\nif (array_key_exists('email', $user)) {\n    echo $user['email'];\n} else {\n    echo \"E\u30e1\u30fc\u30eb\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";\n}\n\n\/\/ Null\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\uff08PHP 7\u4ee5\u964d\uff09\necho $user['email'] ?? \"E\u30e1\u30fc\u30eb\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u8981\u7d20\u306e\u8ffd\u52a0\u30fb\u66f4\u65b0<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u672b\u5c3e\u306b\u8ffd\u52a0\n$fruits = ['apple', 'banana'];\n$fruits[] = 'orange'; \/\/ ['apple', 'banana', 'orange']\n\n\/\/ \u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\/\u30ad\u30fc\u306b\u8ffd\u52a0\u30fb\u66f4\u65b0\n$user = ['name' =&gt; '\u9234\u6728'];\n$user['age'] = 25; \/\/ \u65b0\u3057\u3044\u30ad\u30fc\u306e\u8ffd\u52a0\n$user['name'] = '\u9234\u6728\u4e00\u90ce'; \/\/ \u65e2\u5b58\u30ad\u30fc\u306e\u66f4\u65b0\n\n\/\/ \u8907\u6570\u8981\u7d20\u306e\u4e00\u62ec\u8ffd\u52a0\n$user = ['name' =&gt; '\u4f50\u85e4'];\n$additional_info = ['age' =&gt; 30, 'city' =&gt; '\u5927\u962a'];\n$user = array_merge($user, $additional_info);\n\/\/ \u7d50\u679c: ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 30, 'city' =&gt; '\u5927\u962a']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">\u8981\u7d20\u306e\u524a\u9664<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u7279\u5b9a\u306e\u8981\u7d20\u306e\u524a\u9664\n$fruits = ['apple', 'banana', 'orange'];\nunset($fruits[1]); \/\/ ['apple', 'orange'] \u203b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u30ea\u30bb\u30c3\u30c8\u3055\u308c\u306a\u3044\n\n\/\/ \u30ad\u30fc\u306e\u30ea\u30bb\u30c3\u30c8\uff08\u518d\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\uff09\n$fruits = array_values($fruits); \/\/ [0 =&gt; 'apple', 1 =&gt; 'orange']\n\n\/\/ \u914d\u5217\u306e\u5148\u982d\/\u672b\u5c3e\u306e\u8981\u7d20\u3092\u524a\u9664\u3057\u3001\u305d\u306e\u5024\u3092\u53d6\u5f97\n$stack = [1, 2, 3, 4];\n$first = array_shift($stack); \/\/ $first = 1, $stack = [2, 3, 4]\n$last = array_pop($stack); \/\/ $last = 4, $stack = [2, 3]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u914d\u5217\u306e\u8d70\u67fb<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ foreach\u306b\u3088\u308b\u8d70\u67fb\uff08\u6700\u3082\u4e00\u822c\u7684\uff09\n$fruits = ['apple', 'banana', 'orange'];\nforeach ($fruits as $fruit) {\n    echo $fruit . \"\\n\";\n}\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3092\u53d6\u5f97\n$user = ['name' =&gt; '\u5c71\u7530', 'age' =&gt; 30];\nforeach ($user as $key =&gt; $value) {\n    echo \"$key: $value\\n\";\n}\n\n\/\/ \u53c2\u7167\u306b\u3088\u308b\u8d70\u67fb\uff08\u8981\u7d20\u3092\u76f4\u63a5\u5909\u66f4\uff09\n$numbers = [1, 2, 3, 4];\nforeach ($numbers as &amp;$number) {\n    $number *= 2;\n}\nunset($number); \/\/ \u53c2\u7167\u3092\u89e3\u9664\uff08\u91cd\u8981\uff09\n\/\/ $numbers = [2, 4, 6, 8]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u679c\u7684\u306a\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306f\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3067\u304d\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u9069\u5207\u306a\u64cd\u4f5c\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">\u591a\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\u3068\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 2\u6b21\u5143\u914d\u5217\u306e\u4f5c\u6210\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u4f50\u85e4', 'dept' =&gt; '\u55b6\u696d'],\n    ['id' =&gt; 2, 'name' =&gt; '\u7530\u4e2d', 'dept' =&gt; '\u958b\u767a'],\n    ['id' =&gt; 3, 'name' =&gt; '\u9234\u6728', 'dept' =&gt; '\u4eba\u4e8b']\n];\n\n\/\/ \u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $users[1]['name']; \/\/ \u51fa\u529b: \u7530\u4e2d\n\n\/\/ 3\u6b21\u5143\u914d\u5217\u306e\u4f8b\uff08\u3088\u308a\u8907\u96d1\u306a\u69cb\u9020\uff09\n$company = [\n    '\u55b6\u696d\u90e8' =&gt; [\n        '\u56fd\u5185' =&gt; [\n            ['name' =&gt; '\u4f50\u85e4', 'sales' =&gt; 500],\n            ['name' =&gt; '\u9234\u6728', 'sales' =&gt; 300]\n        ],\n        '\u6d77\u5916' =&gt; [\n            ['name' =&gt; '\u7530\u4e2d', 'sales' =&gt; 600]\n        ]\n    ],\n    '\u958b\u767a\u90e8' =&gt; [\n        '\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9' =&gt; [\n            ['name' =&gt; '\u9ad8\u6a4b', 'projects' =&gt; 5]\n        ]\n    ]\n];\n\n\/\/ \u6df1\u3044\u968e\u5c64\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $company['\u55b6\u696d\u90e8']['\u56fd\u5185'][0]['name']; \/\/ \u51fa\u529b: \u4f50\u85e4\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u591a\u6b21\u5143\u914d\u5217\u306e\u8d70\u67fb<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 2\u6b21\u5143\u914d\u5217\u306e\u8d70\u67fb\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u4f50\u85e4'],\n    ['id' =&gt; 2, 'name' =&gt; '\u7530\u4e2d']\n];\n\nforeach ($users as $user) {\n    echo \"ID: {$user['id']}, \u540d\u524d: {$user['name']}\\n\";\n}\n\n\/\/ \u8907\u96d1\u306a\u591a\u6b21\u5143\u914d\u5217\u306e\u518d\u5e30\u7684\u8d70\u67fb\nfunction traverseArray($array, $prefix = '') {\n    foreach ($array as $key =&gt; $value) {\n        if (is_array($value)) {\n            traverseArray($value, $prefix . $key . '.');\n        } else {\n            echo $prefix . $key . ': ' . $value . \"\\n\";\n        }\n    }\n}\n\ntraverseArray($company);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">\u591a\u6b21\u5143\u914d\u5217\u306e\u64cd\u4f5c\u30c6\u30af\u30cb\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=\"\">\/\/ \u7279\u5b9a\u306e\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u8981\u7d20\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$developers = array_filter($users, function($user) {\n    return $user['dept'] === '\u958b\u767a';\n});\n\n\/\/ \u7279\u5b9a\u306e\u30ad\u30fc\u3060\u3051\u3092\u62bd\u51fa\n$names = array_column($users, 'name');\n\/\/ \u7d50\u679c: ['\u4f50\u85e4', '\u7530\u4e2d', '\u9234\u6728']\n\n\/\/ ID\u5024\u3092\u30ad\u30fc\u306b\u3057\u305f\u9023\u60f3\u914d\u5217\u3078\u306e\u5909\u63db\n$users_by_id = array_column($users, null, 'id');\n\/\/ \u7d50\u679c: [1 =&gt; ['id' =&gt; 1, 'name' =&gt; '\u4f50\u85e4', ...], 2 =&gt; [...]]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">\u591a\u6b21\u5143\u914d\u5217\u306b\u304a\u3051\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u6df1\u3044\u968e\u5c64\u3084\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong>: \u5927\u91cf\u306e\u591a\u6b21\u5143\u914d\u5217\u306f\u591a\u304f\u306e\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3057\u307e\u3059<\/li>\n\n\n\n<li><strong>\u30a2\u30af\u30bb\u30b9\u901f\u5ea6<\/strong>: \u6df1\u3044\u968e\u5c64\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u308f\u305a\u304b\u306a\u304c\u3089\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u767a\u751f\u3057\u307e\u3059<\/li>\n\n\n\n<li><strong>\u53c2\u7167\u6e21\u3057<\/strong>: \u5927\u304d\u306a\u591a\u6b21\u5143\u914d\u5217\u3092\u95a2\u6570\u9593\u3067\u6e21\u3059\u5834\u5408\u306f\u53c2\u7167\u3092\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u53c2\u7167\u306b\u3088\u308b\u5927\u304d\u306a\u591a\u6b21\u5143\u914d\u5217\u306e\u53d7\u3051\u6e21\u3057\nfunction processLargeArray(&amp;$data) {\n    \/\/ \u914d\u5217\u3092\u51e6\u7406...\n}\n\nprocessLargeArray($company); \/\/ \u30b3\u30d4\u30fc\u305b\u305a\u306b\u53c2\u7167\u3092\u6e21\u3059\n<\/pre>\n\n\n\n<p>\u3053\u306e\u7ae0\u3067\u7d39\u4ecb\u3057\u305f\u914d\u5217\u64cd\u4f5c\u306e\u57fa\u672c\u30c6\u30af\u30cb\u30c3\u30af\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001PHP\u914d\u5217\u306e\u6301\u3064\u67d4\u8edf\u6027\u3068\u5f37\u529b\u3055\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">PHP\u306e\u914d\u5217\u95a2\u6570\u5fb9\u5e95\u89e3\u8aac<\/h2>\n\n\n\n<p>PHP\u306f100\u4ee5\u4e0a\u306e\u914d\u5217\u95a2\u9023\u95a2\u6570\u3092\u63d0\u4f9b\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u3089\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3084\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u5b9f\u52d9\u3067\u7279\u306b\u91cd\u8981\u306a\u914d\u5217\u95a2\u6570\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3001\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u914d\u5217\u64cd\u4f5c\u306b\u5fc5\u9808\u306e10\u500b\u306e\u30d3\u30eb\u30c8\u30a4\u30f3\u95a2\u6570<\/h3>\n\n\n\n<p>\u65e5\u3005\u306ePHP\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u7279\u306b\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b10\u500b\u306e\u914d\u5217\u95a2\u6570\u3092\u53b3\u9078\u3057\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u591a\u304f\u306e\u914d\u5217\u64cd\u4f5c\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-21\">1. array_map() \u2013 \u5404\u8981\u7d20\u306b\u95a2\u6570\u3092\u9069\u7528<\/h4>\n\n\n\n<p>\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u9069\u7528\u3057\u3001\u65b0\u3057\u3044\u914d\u5217\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u5909\u63db\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=\"\">\/\/ \u5168\u3066\u306e\u5024\u30922\u500d\u306b\u3059\u308b\n$numbers = [1, 2, 3, 4, 5];\n$doubled = array_map(function($n) {\n    return $n * 2;\n}, $numbers);\n\/\/ \u7d50\u679c: [2, 4, 6, 8, 10]\n\n\/\/ \u8907\u6570\u306e\u914d\u5217\u306e\u5bfe\u5fdc\u3059\u308b\u8981\u7d20\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\n$first_names = ['John', 'Jane', 'Mike'];\n$last_names = ['Doe', 'Smith', 'Johnson'];\n$full_names = array_map(function($first, $last) {\n    return $first . ' ' . $last;\n}, $first_names, $last_names);\n\/\/ \u7d50\u679c: ['John Doe', 'Jane Smith', 'Mike Johnson']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">2. array_filter() \u2013 \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3092\u62bd\u51fa<\/h4>\n\n\n\n<p>\u914d\u5217\u304b\u3089\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u3060\u3051\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5076\u6570\u306e\u307f\u3092\u62bd\u51fa\n$numbers = [1, 2, 3, 4, 5, 6, 7, 8];\n$even_numbers = array_filter($numbers, function($n) {\n    return $n % 2 === 0;\n});\n\/\/ \u7d50\u679c: [2, 4, 6, 8] (\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u4fdd\u6301\u3055\u308c\u307e\u3059)\n\n\/\/ \u7a7a\u3067\u306a\u3044\u5024\u306e\u307f\u3092\u4fdd\u6301\n$values = ['apple', '', 'banana', 0, 'orange', null];\n$non_empty = array_filter($values);\n\/\/ \u7d50\u679c: ['apple', 'banana', 'orange']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">3. array_reduce() \u2013 \u914d\u5217\u3092\u5358\u4e00\u306e\u5024\u306b\u7e2e\u5c0f<\/h4>\n\n\n\n<p>\u914d\u5217\u306e\u5168\u8981\u7d20\u3092\u51e6\u7406\u3057\u3066\u5358\u4e00\u306e\u5024\u306b\u307e\u3068\u3081\u307e\u3059\u3002\u5408\u8a08\u3001\u5e73\u5747\u3001\u6700\u5927\u5024\u306a\u3069\u306e\u8a08\u7b97\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=\"\">\/\/ \u914d\u5217\u306e\u5408\u8a08\u5024\u3092\u8a08\u7b97\n$numbers = [10, 20, 30, 40, 50];\n$sum = array_reduce($numbers, function($carry, $item) {\n    return $carry + $item;\n}, 0);\n\/\/ \u7d50\u679c: 150\n\n\/\/ JSON\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\u304b\u3089\u7279\u5b9a\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u914d\u5217\u3092\u4f5c\u6210\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u4f50\u85e4'],\n    ['id' =&gt; 2, 'name' =&gt; '\u7530\u4e2d'],\n    ['id' =&gt; 3, 'name' =&gt; '\u9234\u6728']\n];\n\n$id_to_name_map = array_reduce($users, function($result, $user) {\n    $result[$user['id']] = $user['name'];\n    return $result;\n}, []);\n\/\/ \u7d50\u679c: [1 =&gt; '\u4f50\u85e4', 2 =&gt; '\u7530\u4e2d', 3 =&gt; '\u9234\u6728']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">4. array_merge() \u2013 \u914d\u5217\u306e\u7d50\u5408<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u30921\u3064\u306b\u307e\u3068\u3081\u307e\u3059\u3002\u540c\u3058\u30ad\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u5f8c\u306e\u914d\u5217\u306e\u5024\u3067\u4e0a\u66f8\u304d\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u914d\u5217\u306e\u7d50\u5408\n$fruits1 = ['apple', 'banana'];\n$fruits2 = ['orange', 'grape'];\n$all_fruits = array_merge($fruits1, $fruits2);\n\/\/ \u7d50\u679c: ['apple', 'banana', 'orange', 'grape']\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u30de\u30fc\u30b8\uff08\u30ad\u30fc\u306e\u885d\u7a81\uff09\n$defaults = ['host' =&gt; 'localhost', 'dbname' =&gt; 'test', 'user' =&gt; 'root'];\n$custom = ['host' =&gt; '192.168.1.1', 'password' =&gt; 'secret'];\n$config = array_merge($defaults, $custom);\n\/\/ \u7d50\u679c: ['host' =&gt; '192.168.1.1', 'dbname' =&gt; 'test', 'user' =&gt; 'root', 'password' =&gt; 'secret']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">5. array_key_exists() \u2013 \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d<\/h4>\n\n\n\n<p>\u914d\u5217\u5185\u306b\u7279\u5b9a\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306b\u6b20\u304b\u305b\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\n$user = ['name' =&gt; '\u5c71\u7530', 'age' =&gt; 30];\n\nif (array_key_exists('email', $user)) {\n    echo $user['email'];\n} else {\n    echo \"E\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";\n}\n\n\/\/ isset()\u3068\u306e\u9055\u3044\n\/\/ array_key_exists()\u306f\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304cnull\u306e\u5834\u5408\u3082true\u3092\u8fd4\u3059\n$data = ['key' =&gt; null];\nvar_dump(array_key_exists('key', $data)); \/\/ true\nvar_dump(isset($data['key'])); \/\/ false\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">6. array_column() \u2013 \u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u5024\u3092\u62bd\u51fa<\/h4>\n\n\n\n<p>\u30ec\u30b3\u30fc\u30c9\u306e\u914d\u5217\u304b\u3089\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u5024\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002DB\u30af\u30a8\u30ea\u7d50\u679c\u306e\u51e6\u7406\u306b\u975e\u5e38\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=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u914d\u5217\u304b\u3089\u540d\u524d\u3060\u3051\u3092\u62bd\u51fa\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u4f50\u85e4', 'age' =&gt; 20],\n    ['id' =&gt; 2, 'name' =&gt; '\u7530\u4e2d', 'age' =&gt; 25],\n    ['id' =&gt; 3, 'name' =&gt; '\u9234\u6728', 'age' =&gt; 30]\n];\n\n$names = array_column($users, 'name');\n\/\/ \u7d50\u679c: ['\u4f50\u85e4', '\u7530\u4e2d', '\u9234\u6728']\n\n\/\/ ID\u3092\u30ad\u30fc\u306b\u3057\u305f\u540d\u524d\u914d\u5217\u3092\u4f5c\u6210\n$id_name_map = array_column($users, 'name', 'id');\n\/\/ \u7d50\u679c: [1 =&gt; '\u4f50\u85e4', 2 =&gt; '\u7530\u4e2d', 3 =&gt; '\u9234\u6728']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">7. in_array() \u2013 \u5024\u306e\u5b58\u5728\u78ba\u8a8d<\/h4>\n\n\n\n<p>\u914d\u5217\u5185\u306b\u7279\u5b9a\u306e\u5024\u304c\u5b58\u5728\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5024\u306e\u5b58\u5728\u78ba\u8a8d\n$fruits = ['apple', 'banana', 'orange'];\n$has_banana = in_array('banana', $fruits); \/\/ true\n$has_grape = in_array('grape', $fruits);   \/\/ false\n\n\/\/ \u53b3\u5bc6\u306a\u578b\u6bd4\u8f03\uff08\u63a8\u5968\uff09\n$values = [1, '2', 3];\nvar_dump(in_array(2, $values));         \/\/ true (\u578b\u5909\u63db\u3042\u308a)\nvar_dump(in_array(2, $values, true));   \/\/ false (\u53b3\u5bc6\u6bd4\u8f03)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">8. array_unique() \u2013 \u91cd\u8907\u5024\u306e\u9664\u53bb<\/h4>\n\n\n\n<p>\u914d\u5217\u304b\u3089\u91cd\u8907\u3059\u308b\u5024\u3092\u9664\u53bb\u3057\u3001\u30e6\u30cb\u30fc\u30af\u306a\u5024\u306e\u307f\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u91cd\u8907\u8981\u7d20\u306e\u524a\u9664\n$numbers = [1, 2, 2, 3, 3, 3, 4, 5, 5];\n$unique = array_unique($numbers);\n\/\/ \u7d50\u679c: [1, 2, 3, 4, 5] (\u30ad\u30fc\u306f\u4fdd\u6301)\n\n\/\/ \u9023\u60f3\u914d\u5217\u306e\u91cd\u8907\u5024\u9664\u53bb\n$users = [\n    ['id' =&gt; 1, 'dept' =&gt; '\u55b6\u696d'],\n    ['id' =&gt; 2, 'dept' =&gt; '\u958b\u767a'],\n    ['id' =&gt; 3, 'dept' =&gt; '\u55b6\u696d']\n];\n\n\/\/ \u90e8\u7f72\u306e\u91cd\u8907\u3092\u9664\u53bb\n$depts = array_unique(array_column($users, 'dept'));\n\/\/ \u7d50\u679c: ['\u55b6\u696d', '\u958b\u767a']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">9. array_diff() \u2013 \u914d\u5217\u9593\u306e\u5dee\u5206\u53d6\u5f97<\/h4>\n\n\n\n<p>\u6700\u521d\u306e\u914d\u5217\u304b\u3089\u3001\u5f8c\u7d9a\u306e\u914d\u5217\u306b\u542b\u307e\u308c\u308b\u5024\u3092\u9664\u3044\u305f\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u9593\u306e\u5dee\u5206\n$array1 = ['apple', 'banana', 'orange', 'kiwi'];\n$array2 = ['banana', 'kiwi', 'grape'];\n$diff = array_diff($array1, $array2);\n\/\/ \u7d50\u679c: ['apple', 'orange'] (\u30ad\u30fc\u306f\u4fdd\u6301)\n\n\/\/ \u8907\u6570\u914d\u5217\u3068\u306e\u5dee\u5206\n$allowed = ['jpg', 'png', 'gif'];\n$uploaded = ['jpg', 'svg', 'pdf'];\n$disallowed = array_diff($uploaded, $allowed);\n\/\/ \u7d50\u679c: ['svg', 'pdf']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">10. array_intersect() \u2013 \u5171\u901a\u8981\u7d20\u306e\u53d6\u5f97<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u306b\u5171\u901a\u3057\u3066\u5b58\u5728\u3059\u308b\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5171\u901a\u8981\u7d20\u306e\u62bd\u51fa\n$array1 = ['apple', 'banana', 'orange'];\n$array2 = ['banana', 'kiwi', 'apple'];\n$common = array_intersect($array1, $array2);\n\/\/ \u7d50\u679c: ['apple', 'banana'] (\u5143\u306e\u914d\u5217\u306e\u30ad\u30fc\u3092\u4fdd\u6301)\n\n\/\/ \u8907\u6570\u914d\u5217\u306e\u5171\u901a\u8981\u7d20\n$user1_interests = ['movies', 'books', 'sports'];\n$user2_interests = ['travel', 'sports', 'music'];\n$user3_interests = ['sports', 'cooking', 'movies'];\n$common_interests = array_intersect($user1_interests, $user2_interests, $user3_interests);\n\/\/ \u7d50\u679c: ['sports']\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff1a\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u3001\u914d\u5217\u306e\u30bd\u30fc\u30c8\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u64cd\u4f5c\u3067\u3059\u3002PHP\u306b\u306f\u3053\u308c\u3089\u3092\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u591a\u69d8\u306a\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-32\">\u914d\u5217\u30bd\u30fc\u30c8\u306e\u57fa\u672c\u3068\u5fdc\u7528<\/h4>\n\n\n\n<p>PHP\u306b\u306f\u69d8\u3005\u306a\u30bd\u30fc\u30c8\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u3082\u306e\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-45822910-a218-4153-9361-e1924dada25a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570\u540d<\/th><th>\u30ad\u30fc\u306e\u4fdd\u6301<\/th><th>\u30bd\u30fc\u30c8\u65b9\u6cd5<\/th><th>\u4f7f\u7528\u30b7\u30ca\u30ea\u30aa<\/th><\/tr><\/thead><tbody><tr><td><code>sort()<\/code><\/td><td>\u00d7<\/td><td>\u5024\u3092\u6607\u9806<\/td><td>\u5358\u7d14\u306a\u914d\u5217\u306e\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>rsort()<\/code><\/td><td>\u00d7<\/td><td>\u5024\u3092\u964d\u9806<\/td><td>\u5358\u7d14\u306a\u914d\u5217\u306e\u9006\u9806\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>asort()<\/code><\/td><td>\u25cb<\/td><td>\u5024\u3092\u6607\u9806<\/td><td>\u9023\u60f3\u914d\u5217\u3092\u5024\u3067\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>arsort()<\/code><\/td><td>\u25cb<\/td><td>\u5024\u3092\u964d\u9806<\/td><td>\u9023\u60f3\u914d\u5217\u3092\u5024\u3067\u9006\u9806\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>ksort()<\/code><\/td><td>\u25cb<\/td><td>\u30ad\u30fc\u3092\u6607\u9806<\/td><td>\u9023\u60f3\u914d\u5217\u3092\u30ad\u30fc\u3067\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>krsort()<\/code><\/td><td>\u25cb<\/td><td>\u30ad\u30fc\u3092\u964d\u9806<\/td><td>\u9023\u60f3\u914d\u5217\u3092\u30ad\u30fc\u3067\u9006\u9806\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>usort()<\/code><\/td><td>\u00d7<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570<\/td><td>\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e\u6bd4\u8f03<\/td><\/tr><tr><td><code>uasort()<\/code><\/td><td>\u25cb<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570<\/td><td>\u30ad\u30fc\u3092\u4fdd\u6301\u3057\u305f\u8907\u96d1\u306a\u30bd\u30fc\u30c8<\/td><\/tr><tr><td><code>uksort()<\/code><\/td><td>\u25cb<\/td><td>\u30ab\u30b9\u30bf\u30e0\u95a2\u6570<\/td><td>\u30ad\u30fc\u306b\u5bfe\u3059\u308b\u8907\u96d1\u306a\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=\"\">\/\/ \u5358\u7d14\u306a\u914d\u5217\u306e\u30bd\u30fc\u30c8\n$fruits = ['orange', 'apple', 'banana'];\nsort($fruits);\n\/\/ \u7d50\u679c: ['apple', 'banana', 'orange']\n\n\/\/ \u9023\u60f3\u914d\u5217\u3092\u5024\u3067\u30bd\u30fc\u30c8\uff08\u30ad\u30fc\u3092\u4fdd\u6301\uff09\n$ages = ['John' =&gt; 25, 'Mary' =&gt; 30, 'Bob' =&gt; 20];\nasort($ages);\n\/\/ \u7d50\u679c: ['Bob' =&gt; 20, 'John' =&gt; 25, 'Mary' =&gt; 30]\n\n\/\/ \u9023\u60f3\u914d\u5217\u3092\u30ad\u30fc\u3067\u30bd\u30fc\u30c8\n$data = [5 =&gt; 'five', 3 =&gt; 'three', 1 =&gt; 'one'];\nksort($data);\n\/\/ \u7d50\u679c: [1 =&gt; 'one', 3 =&gt; 'three', 5 =&gt; 'five']\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\uff08usort\uff09\n$users = [\n    ['name' =&gt; '\u7530\u4e2d', 'age' =&gt; 30],\n    ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 25],\n    ['name' =&gt; '\u9234\u6728', 'age' =&gt; 30]\n];\n\n\/\/ \u5e74\u9f62\u3067\u6607\u9806\u30bd\u30fc\u30c8\u3001\u540c\u3058\u5e74\u9f62\u306a\u3089\u540d\u524d\u3067\u30bd\u30fc\u30c8\nusort($users, function($a, $b) {\n    if ($a['age'] == $b['age']) {\n        return strcmp($a['name'], $b['name']);\n    }\n    return $a['age'] - $b['age'];\n});\n\/*\n\u7d50\u679c:\n[\n    ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 25],\n    ['name' =&gt; '\u9234\u6728', 'age' =&gt; 30],\n    ['name' =&gt; '\u7530\u4e2d', 'age' =&gt; 30]\n]\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">\u9ad8\u5ea6\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h4>\n\n\n\n<p>\u57fa\u672c\u7684\u306a<code>array_filter()<\/code>\u306e\u4f7f\u3044\u65b9\u306b\u52a0\u3048\u3066\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u6761\u4ef6\u3067\u306e\u7d5e\u308a\u8fbc\u307f\n$products = [\n    ['id' =&gt; 1, 'name' =&gt; 'Laptop', 'price' =&gt; 80000, 'stock' =&gt; 10],\n    ['id' =&gt; 2, 'name' =&gt; 'Tablet', 'price' =&gt; 40000, 'stock' =&gt; 5],\n    ['id' =&gt; 3, 'name' =&gt; 'Phone', 'price' =&gt; 60000, 'stock' =&gt; 0],\n    ['id' =&gt; 4, 'name' =&gt; 'Desktop', 'price' =&gt; 120000, 'stock' =&gt; 3]\n];\n\n\/\/ \u5728\u5eab\u304c\u3042\u308a\u30016\u4e07\u5186\u4ee5\u4e0b\u306e\u5546\u54c1\u306e\u307f\u62bd\u51fa\n$affordable_available = array_filter($products, function($product) {\n    return $product['stock'] &gt; 0 &amp;&amp; $product['price'] &lt;= 60000;\n});\n\/*\n\u7d50\u679c:\n[\n    ['id' =&gt; 2, 'name' =&gt; 'Tablet', 'price' =&gt; 40000, 'stock' =&gt; 5]\n]\n*\/\n\n\/\/ PHP 7.4\u4ee5\u964d\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$in_stock = array_filter($products, fn($p) =&gt; $p['stock'] &gt; 0);\n\n\/\/ \u30ad\u30fc\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0 (PHP 5.6\u4ee5\u964d)\n$data = ['foo' =&gt; 1, 'bar' =&gt; 2, 'baz' =&gt; 3];\n\/\/ \u30ad\u30fc\u304c 'b' \u3067\u59cb\u307e\u308b\u30a8\u30f3\u30c8\u30ea\u30fc\u306e\u307f\u62bd\u51fa\n$filtered = array_filter($data, function($key) {\n    return strpos($key, 'b') === 0;\n}, ARRAY_FILTER_USE_KEY);\n\/\/ \u7d50\u679c: ['bar' =&gt; 2, 'baz' =&gt; 3]\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u4e21\u65b9\u306b\u57fa\u3065\u304f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$users = [\n    'user1' =&gt; ['name' =&gt; 'Alice', 'active' =&gt; true],\n    'admin1' =&gt; ['name' =&gt; 'Bob', 'active' =&gt; true],\n    'user2' =&gt; ['name' =&gt; 'Charlie', 'active' =&gt; false]\n];\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u7ba1\u7406\u8005\u306e\u307f\u62bd\u51fa\n$active_admins = array_filter($users, function($user, $key) {\n    return $user['active'] &amp;&amp; strpos($key, 'admin') === 0;\n}, ARRAY_FILTER_USE_BOTH);\n\/\/ \u7d50\u679c: ['admin1' =&gt; ['name' =&gt; 'Bob', 'active' =&gt; true]]\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-34\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u914d\u5217\u95a2\u6570\u306e\u9078\u3073\u65b9<\/h3>\n\n\n\n<p>\u914d\u5217\u95a2\u6570\u306e\u9078\u629e\u306f\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u6271\u3046\u5834\u5408\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u306b\u5bfe\u3057\u3066\u6700\u9069\u306a\u95a2\u6570\u306e\u9078\u3073\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">1. \u8981\u7d20\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=\"\">\/\/ \u5927\u898f\u6a21\u914d\u5217\u3067\u306e\u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d\n$large_array = range(1, 100000);\n$needle = 50000;\n\n\/\/ \u60aa\u3044\u4f8b (O(n)\u306e\u6642\u9593\u8907\u96d1\u5ea6)\n$exists = in_array($needle, $large_array); \/\/ \u7dda\u5f62\u63a2\u7d22\n\n\/\/ \u826f\u3044\u4f8b (O(1)\u306e\u6642\u9593\u8907\u96d1\u5ea6)\n$flipped = array_flip($large_array); \/\/ \u5024\u3092\u30ad\u30fc\u306b\u5909\u63db\n$exists = isset($flipped[$needle]); \/\/ \u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u306e\u5373\u6642\u691c\u7d22\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-36\">2. \u91cd\u8907\u30c1\u30a7\u30c3\u30af\u3068\u9664\u53bb<\/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=\"\">\/\/ \u5927\u898f\u6a21\u914d\u5217\u3067\u306e\u91cd\u8907\u51e6\u7406\n$large_array = array_merge(range(1, 50000), range(1, 30000));\n\n\/\/ \u3084\u3084\u9045\u3044\u65b9\u6cd5\n$unique = array_unique($large_array); \/\/ \u5185\u90e8\u7684\u306b\u306f\u5168\u8981\u7d20\u6bd4\u8f03\n\n\/\/ \u9ad8\u901f\u306a\u65b9\u6cd5\uff08\u5024\u306e\u51fa\u73fe\u56de\u6570\u304c\u4e0d\u8981\u306a\u5834\u5408\uff09\n$unique_keys = array_keys(array_flip($large_array));\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-37\">3. \u914d\u5217\u7d50\u5408\u306b\u304a\u3051\u308b\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u30de\u30fc\u30b8\uff08\u5c0f\u301c\u4e2d\u898f\u6a21\u306e\u914d\u5217\uff09\n$array1 = ['a' =&gt; 1, 'b' =&gt; 2];\n$array2 = ['c' =&gt; 3, 'd' =&gt; 4];\n$merged = array_merge($array1, $array2); \/\/ \u9069\u5207\n\n\/\/ \u914d\u5217\u306e\u7d50\u5408\uff08\u975e\u5e38\u306b\u591a\u304f\u306e\u914d\u5217\uff09\n$many_arrays = [];\nfor ($i = 0; $i &lt; 1000; $i++) {\n    $many_arrays[] = [$i =&gt; $i];\n}\n\n\/\/ \u60aa\u3044\u4f8b\uff08\u7e70\u308a\u8fd4\u3057\u30de\u30fc\u30b8\uff09\n$result = [];\nforeach ($many_arrays as $arr) {\n    $result = array_merge($result, $arr);\n}\n\n\/\/ \u826f\u3044\u4f8b\uff08\u4e00\u5ea6\u306ecall\u3067\u51e6\u7406\uff09\n$result = array_merge(...$many_arrays);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">4. \u914d\u5217\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/h4>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u9069\u5207\u306a\u95a2\u6570\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-cfee7ed0-01c9-427c-ac7d-af6def2c956a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u64cd\u4f5c<\/th><th>\u4f4e\u901f\u306a\u65b9\u6cd5<\/th><th>\u9ad8\u901f\u306a\u65b9\u6cd5<\/th><th>\u901f\u5ea6\u5dee<\/th><\/tr><\/thead><tbody><tr><td>\u5024\u306e\u5b58\u5728\u78ba\u8a8d<\/td><td><code>in_array()<\/code><\/td><td><code>isset(array_flip($array)[$needle])<\/code><\/td><td>\u301c100\u500d<\/td><\/tr><tr><td>\u914d\u5217\u306e\u7d50\u5408<\/td><td>\u7e70\u308a\u8fd4\u3057<code>array_merge()<\/code><\/td><td>\u53ef\u5909\u5f15\u6570\u3067\u306e<code>array_merge()<\/code><\/td><td>\u301c3\u500d<\/td><\/tr><tr><td>\u9023\u60f3\u914d\u5217\u306e\u53cd\u5fa9<\/td><td><code>foreach<\/code> + <code>if<\/code><\/td><td><code>array_filter()<\/code><\/td><td>\u307b\u307c\u540c\u7b49<\/td><\/tr><tr><td>\u5024\u306e\u5909\u63db<\/td><td><code>foreach<\/code> + \u4ee3\u5165<\/td><td><code>array_map()<\/code><\/td><td>\u307b\u307c\u540c\u7b49<\/td><\/tr><tr><td>\u914d\u5217\u5185\u691c\u7d22<\/td><td><code>foreach<\/code> + \u6761\u4ef6<\/td><td><code>array_search()<\/code><\/td><td>\u301c2\u500d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5177\u4f53\u7684\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001\u5e38\u306b\u4e21\u65b9\u306e\u65b9\u6cd5\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u53d6\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u3084PHP\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u7d50\u679c\u306f\u5909\u308f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306e\u4f8b\nfunction benchmark($func, $iterations = 1000) {\n    $start = microtime(true);\n    for ($i = 0; $i &lt; $iterations; $i++) {\n        $func();\n    }\n    return microtime(true) - $start;\n}\n\n$array = range(1, 10000);\n$needle = 9876;\n\n$time1 = benchmark(function() use ($array, $needle) {\n    in_array($needle, $array);\n});\n\n$flipped = array_flip($array);\n$time2 = benchmark(function() use ($flipped, $needle) {\n    isset($flipped[$needle]);\n});\n\necho \"in_array: $time1 \u79d2\\n\";\necho \"array_flip + isset: $time2 \u79d2\\n\";\necho \"\u901f\u5ea6\u6bd4: \" . ($time1 \/ $time2) . \"\u500d\\n\";\n<\/pre>\n\n\n\n<p>\u914d\u5217\u95a2\u6570\u306e\u8ce2\u3044\u9078\u629e\u3068\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u3082\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u306f\u3001\u3055\u3089\u306b\u5927\u898f\u6a21\u306a\u914d\u5217\u3092\u6271\u3046\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-39\">PHP\u914d\u5217\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<p>\u5927\u898f\u6a21\u306aWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30c7\u30fc\u30bf\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u3092\u958b\u767a\u3059\u308b\u969b\u3001\u914d\u5217\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306f\u91cd\u8981\u306a\u8ab2\u984c\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001PHP\u306e\u914d\u5217\u64cd\u4f5c\u3092\u9ad8\u901f\u5316\u3057\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3059\u308b\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">\u5927\u898f\u6a21\u914d\u5217\u51e6\u7406\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP\u914d\u5217\u3092\u5927\u91cf\u306b\u6271\u3046\u969b\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u6025\u5897\u3057\u3066\u300cFatal error: Allowed memory size exhausted\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u9632\u3050\u305f\u3081\u306e\u52b9\u679c\u7684\u306a\u6226\u7565\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">1. \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u5ea6\u306b\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\u4ee3\u308f\u308a\u306b\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u5c11\u3057\u305a\u3064\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u6d88\u8cbb\u3092\u6291\u3048\u3089\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=\"\">\/\/ \u60aa\u3044\u4f8b: \u5927\u304d\u306aCSV\u3092\u4e00\u5ea6\u306b\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\nfunction processLargeCsv_bad($filename) {\n    $data = file($filename); \/\/ \u3059\u3079\u3066\u306e\u884c\u3092\u30e1\u30e2\u30ea\u306b\u8aad\u307f\u8fbc\u3080\n    $results = [];\n    \n    foreach ($data as $line) {\n        $results[] = processLine($line);\n    }\n    \n    return $results;\n}\n\n\/\/ \u826f\u3044\u4f8b: SplFileObject\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30c6\u30ec\u30fc\u30bf\u3067\u51e6\u7406\nfunction processLargeCsv_good($filename) {\n    $file = new SplFileObject($filename);\n    $file-&gt;setFlags(SplFileObject::READ_CSV);\n    $results = [];\n    \n    foreach ($file as $line) {\n        if (!empty($line[0])) {  \/\/ \u7a7a\u884c\u30b9\u30ad\u30c3\u30d7\n            $results[] = processLine($line);\n            \n            \/\/ \u30e1\u30e2\u30ea\u3092\u7bc0\u7d04\u3059\u308b\u305f\u3081\u306b\u30d0\u30c3\u30c1\u51e6\u7406\n            if (count($results) &gt;= 1000) {\n                saveResultsBatch($results);\n                $results = []; \/\/ \u30e1\u30e2\u30ea\u89e3\u653e\n            }\n        }\n    }\n    \n    \/\/ \u6b8b\u308a\u306e\u7d50\u679c\u3092\u4fdd\u5b58\n    if (!empty($results)) {\n        saveResultsBatch($results);\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">2. \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u4f7f\u7528<\/h4>\n\n\n\n<p>PHP\u306e\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u3068\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u751f\u6210\u3059\u308b\u969b\u306b\u3059\u3079\u3066\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\u305b\u305a\u306b\u4e00\u5ea6\u306b1\u3064\u306e\u5024\u3060\u3051\u3092\u751f\u6210\u3057\u3066\u8fd4\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=\"\">\/\/ \u60aa\u3044\u4f8b: \u5de8\u5927\u306a\u914d\u5217\u3092\u751f\u6210\u3057\u3066\u8fd4\u3059\nfunction getLargeDataset_bad() {\n    $data = [];\n    for ($i = 0; $i &lt; 1000000; $i++) {\n        $data[] = computeValue($i);\n    }\n    return $data; \/\/ 100\u4e07\u8981\u7d20\u306e\u914d\u5217\u304c\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\u3055\u308c\u308b\n}\n\n\/\/ \u826f\u3044\u4f8b: \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u5024\u30921\u3064\u305a\u3064\u751f\u6210\nfunction getLargeDataset_good() {\n    for ($i = 0; $i &lt; 1000000; $i++) {\n        yield computeValue($i); \/\/ \u4e00\u5ea6\u306b1\u3064\u306e\u5024\u3060\u3051\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nforeach (getLargeDataset_good() as $value) {\n    processValue($value);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-43\">3. \u53c2\u7167\u6e21\u3057\u306e\u9069\u5207\u306a\u4f7f\u7528<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u3092\u95a2\u6570\u9593\u3067\u53d7\u3051\u6e21\u3059\u5834\u5408\u3001\u5024\u6e21\u3057\u3067\u306f\u306a\u304f\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u3046\u3053\u3068\u3067\u30b3\u30d4\u30fc\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u907f\u3051\u3089\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=\"\">\/\/ \u60aa\u3044\u4f8b: \u914d\u5217\u306e\u30b3\u30d4\u30fc\u304c\u767a\u751f\nfunction processArray_bad($array) {\n    \/\/ \u5927\u304d\u306a\u914d\u5217\u306e\u5b8c\u5168\u306a\u30b3\u30d4\u30fc\u304c\u4f5c\u6210\u3055\u308c\u308b\n    foreach ($array as $key =&gt; $value) {\n        $array[$key] = transform($value);\n    }\n    return $array;\n}\n\n\/\/ \u826f\u3044\u4f8b: \u53c2\u7167\u6e21\u3057\u3067\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\nfunction processArray_good(&amp;$array) {\n    foreach ($array as $key =&gt; $value) {\n        $array[$key] = transform($value);\n    }\n    \/\/ \u53c2\u7167\u6e21\u3057\u306a\u306e\u3067\u3001\u623b\u308a\u5024\u306f\u4e0d\u8981\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">4. unset\u306b\u3088\u308b\u30e1\u30e2\u30ea\u89e3\u653e<\/h4>\n\n\n\n<p>\u4e0d\u8981\u306b\u306a\u3063\u305f\u5927\u304d\u306a\u914d\u5217\u3084\u5909\u6570\u306f\u660e\u793a\u7684\u306b<code>unset()<\/code>\u3092\u4f7f\u3063\u3066\u89e3\u653e\u3059\u308b\u3053\u3068\u3067\u3001PHP\u306e\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30bf\u3092\u52a9\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function processInBatches($data) {\n    $totalBatches = ceil(count($data) \/ 1000);\n    \n    for ($i = 0; $i &lt; $totalBatches; $i++) {\n        $batch = array_slice($data, $i * 1000, 1000);\n        processBatch($batch);\n        unset($batch); \/\/ \u51e6\u7406\u5f8c\u306f\u660e\u793a\u7684\u306b\u30e1\u30e2\u30ea\u3092\u89e3\u653e\n    }\n    \n    \/\/ \u5927\u304d\u306a\u51e6\u7406\u304c\u7d42\u308f\u3063\u305f\u5f8c\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u78ba\u8a8d\n    echo \"\u73fe\u5728\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . memory_get_usage() \/ 1024 \/ 1024 . \"MB\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">5. SPL\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>PHP\u306eSPL\uff08Standard PHP Library\uff09\u306b\u306f\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u7279\u306b<code>SplFixedArray<\/code>\u306f\u901a\u5e38\u306e\u914d\u5217\u3088\u308a\u3082\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5c11\u306a\u304f\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306e\u914d\u5217\n$regularArray = [];\nfor ($i = 0; $i &lt; 1000000; $i++) {\n    $regularArray[$i] = $i;\n}\necho \"\u901a\u5e38\u914d\u5217\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . memory_get_usage() \/ 1024 \/ 1024 . \"MB\\n\";\n\n\/\/ SplFixedArray\n$fixedArray = new SplFixedArray(1000000);\nfor ($i = 0; $i &lt; 1000000; $i++) {\n    $fixedArray[$i] = $i;\n}\necho \"SplFixedArray\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . memory_get_usage() \/ 1024 \/ 1024 . \"MB\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-46\">\u5b9f\u884c\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u914d\u5217\u51e6\u7406\u306e\u5b9f\u884c\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u3076\u3053\u3068\u3067\u3001\u540c\u3058\u51e6\u7406\u3092\u3088\u308a\u9ad8\u901f\u306b\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">1. \u9069\u5207\u306a\u914d\u5217\u95a2\u6570\u306e\u9078\u629e<\/h4>\n\n\n\n<p>\u540c\u3058\u51e6\u7406\u3067\u3082\u3001\u7570\u306a\u308b\u95a2\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u5927\u304d\u306a\u901f\u5ea6\u5dee\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$largeArray = range(1, 100000);\n$needle = 99999;\n\n\/\/ \u65b9\u6cd51: in_array()\u3092\u4f7f\u7528\n$start = microtime(true);\n$sum = array_sum($array);\n$time3 = microtime(true) - $start;\n\necho \"foreach: {$time1}\u79d2\\n\";\necho \"\u6700\u9069\u5316\u3057\u305ffor: {$time2}\u79d2\\n\";\necho \"array_sum(): {$time3}\u79d2\\n\";\n\/\/ \u591a\u304f\u306e\u5834\u5408\u3001array_sum()\u304c\u6700\u3082\u901f\u3044\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-48\">4. \u914d\u5217\u95a2\u6570\u30c1\u30a7\u30fc\u30f3 vs \u500b\u5225\u51e6\u7406<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u914d\u5217\u64cd\u4f5c\u3092\u9023\u7d9a\u3057\u3066\u884c\u3046\u5834\u5408\u3001\u95a2\u6570\u30c1\u30a7\u30fc\u30f3\u3068\u500b\u5225\u51e6\u7406\u306e\u3069\u3061\u3089\u304c\u52b9\u7387\u7684\u304b\u306f\u72b6\u6cc1\u306b\u3088\u308a\u7570\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=\"\">$data = range(1, 10000);\n\n\/\/ \u65b9\u6cd51: \u95a2\u6570\u30c1\u30a7\u30fc\u30f3\n$start = microtime(true);\n$result = array_filter(\n    array_map(\n        function($x) { return $x * 2; },\n        $data\n    ),\n    function($x) { return $x % 4 == 0; }\n);\n$time1 = microtime(true) - $start;\n\n\/\/ \u65b9\u6cd52: \u500b\u5225\u51e6\u7406\uff08\u4e2d\u9593\u914d\u5217\u304c\u751f\u6210\u3055\u308c\u308b\uff09\n$start = microtime(true);\n$mapped = array_map(function($x) { return $x * 2; }, $data);\n$result = array_filter($mapped, function($x) { return $x % 4 == 0; });\n$time2 = microtime(true) - $start;\n\n\/\/ \u65b9\u6cd53: 1\u3064\u306e\u30eb\u30fc\u30d7\u3067\u51e6\u7406\uff08\u4e2d\u9593\u914d\u5217\u3092\u751f\u6210\u3057\u306a\u3044\uff09\n$start = microtime(true);\n$result = [];\nforeach ($data as $x) {\n    $doubled = $x * 2;\n    if ($doubled % 4 == 0) {\n        $result[] = $doubled;\n    }\n}\n$time3 = microtime(true) - $start;\n\necho \"\u95a2\u6570\u30c1\u30a7\u30fc\u30f3: {$time1}\u79d2\\n\";\necho \"\u500b\u5225\u51e6\u7406: {$time2}\u79d2\\n\";\necho \"\u5358\u4e00\u30eb\u30fc\u30d7: {$time3}\u79d2\\n\";\n\/\/ \u591a\u304f\u306e\u5834\u5408\u3001\u5358\u4e00\u30eb\u30fc\u30d7\u304c\u6700\u3082\u9ad8\u901f\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-49\">5. \u914d\u5217\u30a2\u30af\u30bb\u30b9\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u914d\u5217\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u30eb\u30fc\u30d7\u3067\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=\"\">$data = [\n    'very' =&gt; [\n        'deep' =&gt; [\n            'nested' =&gt; [\n                'value' =&gt; 42\n            ]\n        ]\n    ]\n];\n\n\/\/ \u60aa\u3044\u4f8b: \u30eb\u30fc\u30d7\u5185\u3067\u6bce\u56de\u6df1\u304f\u30cd\u30b9\u30c8\u3055\u308c\u305f\u5024\u306b\u30a2\u30af\u30bb\u30b9\n$start = microtime(true);\n$sum = 0;\nfor ($i = 0; $i &lt; 100000; $i++) {\n    $sum += $data['very']['deep']['nested']['value'];\n}\n$time1 = microtime(true) - $start;\n\n\/\/ \u826f\u3044\u4f8b: \u4e00\u5ea6\u3060\u3051\u5909\u6570\u306b\u683c\u7d0d\u3057\u3066\u304b\u3089\u30a2\u30af\u30bb\u30b9\n$start = microtime(true);\n$value = $data['very']['deep']['nested']['value']; \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\n$sum = 0;\nfor ($i = 0; $i &lt; 100000; $i++) {\n    $sum += $value;\n}\n$time2 = microtime(true) - $start;\n\necho \"\u6bce\u56de\u30a2\u30af\u30bb\u30b9: {$time1}\u79d2\\n\";\necho \"\u30ad\u30e3\u30c3\u30b7\u30e5\u4f7f\u7528: {$time2}\u79d2\\n\";\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u6570\u500d\u9ad8\u901f\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-50\">\u914d\u5217\u64cd\u4f5c\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3068\u6700\u9069\u5316\u4e8b\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u914d\u5217\u6700\u9069\u5316\u4e8b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6280\u8853\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u73fe\u5b9f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3069\u306e\u7a0b\u5ea6\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u304c\u898b\u8fbc\u3081\u308b\u304b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-51\">\u4e8b\u4f8b1: \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u96c6\u8a08<\/h4>\n\n\n\n<p>\u3042\u308bEC\u30b5\u30a4\u30c8\u3067\u3001\u6ce8\u6587\u30c7\u30fc\u30bf\uff08100\u4e07\u4ef6\uff09\u304b\u3089\u7279\u5b9a\u6761\u4ef6\u306e\u6ce8\u6587\u3092\u62bd\u51fa\u3057\u3001\u7d71\u8a08\u60c5\u5831\u3092\u751f\u6210\u3059\u308b\u51e6\u7406\u3092\u6700\u9069\u5316\u3057\u305f\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6700\u9069\u5316\u524d:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5168\u30c7\u30fc\u30bf\u3092\u4e00\u5ea6\u306b\u30ed\u30fc\u30c9\n$orders = $db-&gt;fetchAll(\"SELECT * FROM orders\"); \/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \u7d04500MB\n\n\/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u96c6\u8a08\n$filtered = [];\nforeach ($orders as $order) {\n    if ($order['status'] == 'completed' &amp;&amp; $order['total'] &gt; 5000) {\n        $filtered[] = $order;\n    }\n}\n\n\/\/ \u7d71\u8a08\u8a08\u7b97\n$stats = [\n    'count' =&gt; count($filtered),\n    'total_amount' =&gt; array_sum(array_column($filtered, 'total')),\n    'avg_items' =&gt; array_sum(array_column($filtered, 'item_count')) \/ count($filtered)\n];\n\n\/\/ \u5b9f\u884c\u6642\u9593: \u7d044.2\u79d2\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \u7d04650MB\n<\/pre>\n\n\n\n<p><strong>\u6700\u9069\u5316\u5f8c:<\/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=\"\">\/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\nfunction getFilteredOrders($minTotal) {\n    $db = getDatabase();\n    $stmt = $db-&gt;prepare(\"SELECT * FROM orders WHERE status = 'completed' AND total &gt; ?\");\n    $stmt-&gt;execute([$minTotal]);\n    \n    \/\/ \u4e00\u5ea6\u306b1000\u4ef6\u305a\u3064\u51e6\u7406\n    while ($rows = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC, PDO::FETCH_ORI_NEXT, 1000)) {\n        foreach ($rows as $row) {\n            yield $row;\n        }\n    }\n}\n\n\/\/ \u7d71\u8a08\u60c5\u5831\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u8a08\u7b97\n$count = 0;\n$totalAmount = 0;\n$totalItems = 0;\n\nforeach (getFilteredOrders(5000) as $order) {\n    $count++;\n    $totalAmount += $order['total'];\n    $totalItems += $order['item_count'];\n}\n\n$stats = [\n    'count' =&gt; $count,\n    'total_amount' =&gt; $totalAmount,\n    'avg_items' =&gt; $count &gt; 0 ? $totalItems \/ $count : 0\n];\n\n\/\/ \u5b9f\u884c\u6642\u9593: \u7d040.8\u79d2\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \u7d0415MB\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a: 5\u500d\u4ee5\u4e0a\u306e\u9ad8\u901f\u5316\u300143\u500d\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u524a\u6e1b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-52\">\u4e8b\u4f8b2: JSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u6700\u9069\u5316<\/h4>\n\n\n\n<p>API\u304b\u3089\u53d6\u5f97\u3057\u305f\u5927\u91cf\u306eJSON\u30c7\u30fc\u30bf\uff08\u5546\u54c1\u60c5\u583110\u4e07\u4ef6\uff09\u3092\u51e6\u7406\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6700\u9069\u5316\u524d:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u5ea6\u306b\u51e6\u7406\n$productsJson = file_get_contents('products.json');\n$products = json_decode($productsJson, true);\n\n$categoryCounts = [];\nforeach ($products as $product) {\n    $category = $product['category'];\n    if (!isset($categoryCounts[$category])) {\n        $categoryCounts[$category] = 0;\n    }\n    $categoryCounts[$category]++;\n}\n\n\/\/ \u30ab\u30c6\u30b4\u30ea\u3092\u51fa\u73fe\u56de\u6570\u3067\u4e26\u3079\u66ff\u3048\narsort($categoryCounts);\n\n\/\/ \u5b9f\u884c\u6642\u9593: \u7d041.2\u79d2\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \u7d04120MB\n<\/pre>\n\n\n\n<p><strong>\u6700\u9069\u5316\u5f8c:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ JSON\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30d1\u30fc\u30b5\u30fc\u3092\u4f7f\u7528\n$parser = new JsonStreamingParser\\Parser(\n    fopen('products.json', 'r'),\n    new ProductCategoryCounter()\n);\n$parser-&gt;parse();\n\nclass ProductCategoryCounter implements JsonStreamingParser\\Listener {\n    private $categoryCounts = [];\n    private $inProduct = false;\n    private $currentCategory = null;\n    \n    \/\/ \u7701\u7565: JsonStreamingParser\\Listener\u306e\u5b9f\u88c5\n    \n    public function getCategoryCounts() {\n        arsort($this-&gt;categoryCounts);\n        return $this-&gt;categoryCounts;\n    }\n}\n\n$categoryCounts = $counter-&gt;getCategoryCounts();\n\n\/\/ \u5b9f\u884c\u6642\u9593: \u7d040.3\u79d2\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \u7d045MB\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a: 4\u500d\u306e\u9ad8\u901f\u5316\u300124\u500d\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u524a\u6e1b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u914d\u5217\u64cd\u4f5c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5b9f\u9a13\u306e\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u69d8\u3005\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30921\u4e07\u56de\u306e\u7e70\u308a\u8fd4\u3057\u3067\u30c6\u30b9\u30c8\u3057\u305f\u7d50\u679c\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n\n\n<div id=\"id-e351b26e-91db-4682-a40e-b31728903e8b\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u64cd\u4f5c<\/th><th>\u65b9\u6cd5<\/th><th>\u5b9f\u884c\u6642\u9593 (ms)<\/th><th>\u30e1\u30e2\u30ea (MB)<\/th><th>\u76f8\u5bfe\u901f\u5ea6<\/th><\/tr><\/thead><tbody><tr><td>\u5024\u306e\u691c\u7d22<\/td><td>in_array()<\/td><td>250<\/td><td>5<\/td><td>1x<\/td><\/tr><tr><td>\u5024\u306e\u691c\u7d22<\/td><td>array_flip + isset<\/td><td>15<\/td><td>10<\/td><td>16.7x<\/td><\/tr><tr><td>\u5408\u8a08\u8a08\u7b97<\/td><td>foreach<\/td><td>100<\/td><td>5<\/td><td>1x<\/td><\/tr><tr><td>\u5408\u8a08\u8a08\u7b97<\/td><td>array_sum<\/td><td>30<\/td><td>5<\/td><td>3.3x<\/td><\/tr><tr><td>\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/td><td>array_filter<\/td><td>180<\/td><td>12<\/td><td>1x<\/td><\/tr><tr><td>\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/td><td>\u624b\u52d5\u30eb\u30fc\u30d7<\/td><td>150<\/td><td>8<\/td><td>1.2x<\/td><\/tr><tr><td>\u8981\u7d20\u8ffd\u52a0<\/td><td>array[] = value<\/td><td>90<\/td><td>15<\/td><td>1x<\/td><\/tr><tr><td>\u8981\u7d20\u8ffd\u52a0<\/td><td>SplFixedArray<\/td><td>60<\/td><td>8<\/td><td>1.5x<\/td><\/tr><tr><td>\u591a\u6b21\u5143\u30a2\u30af\u30bb\u30b9<\/td><td>\u76f4\u63a5\u30a2\u30af\u30bb\u30b9<\/td><td>200<\/td><td>5<\/td><td>1x<\/td><\/tr><tr><td>\u591a\u6b21\u5143\u30a2\u30af\u30bb\u30b9<\/td><td>\u5909\u6570\u30ad\u30e3\u30c3\u30b7\u30e5<\/td><td>40<\/td><td>5<\/td><td>5x<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u306e\u7d50\u679c\u304b\u3089\u3001\u7279\u306b\u4ee5\u4e0b\u306e\u70b9\u304c\u91cd\u8981\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u691c\u7d22\u64cd\u4f5c\u3067\u306f\u7279\u5316\u3057\u305f\u624b\u6cd5\u304c\u5287\u7684\u306b\u901f\u3044<\/strong>\uff1a<code>in_array()<\/code>\u3088\u308a\u3082<code>array_flip() + isset()<\/code>\u304c\u5727\u5012\u7684\u306b\u9ad8\u901f<\/li>\n\n\n\n<li><strong>\u30d3\u30eb\u30c8\u30a4\u30f3\u95a2\u6570\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u624b\u52d5\u30eb\u30fc\u30d7\u3088\u308a\u52b9\u7387\u7684<\/strong>\uff1a<code>array_sum()<\/code>\u3084<code>array_merge()<\/code>\u306a\u3069\u306e\u6700\u9069\u5316\u3055\u308c\u305f\u95a2\u6570\u3092\u6d3b\u7528\u3059\u308b<\/li>\n\n\n\n<li><strong>\u7e70\u308a\u8fd4\u3057\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5024\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b<\/strong>\uff1a\u7279\u306b\u591a\u6b21\u5143\u914d\u5217\u306e\u6df1\u3044\u30a2\u30af\u30bb\u30b9\u3067\u306f\u52b9\u679c\u5927<\/li>\n\n\n\n<li><strong>\u9069\u5207\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u9078\u629e\u3059\u308b<\/strong>\uff1a\u7528\u9014\u306b\u5fdc\u3058\u3066\u6a19\u6e96\u914d\u5217\u3068SPL\u30af\u30e9\u30b9\u3092\u4f7f\u3044\u5206\u3051\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9ad8\u901f\u3067\u52b9\u7387\u7684\u306a\u914d\u5217\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002found = in_array($needle, $largeArray); $time1 = microtime(true) \u2013 $start;<\/p>\n\n\n\n<p>\/\/ \u65b9\u6cd52: array_flip\u3092\u4f7f\u7528\u3057\u3066\u691c\u7d22 $start = microtime(true); $flipped = array_flip($largeArray); $found = isset($flipped[$needle]); $time2 = microtime(true) \u2013 $start;<\/p>\n\n\n\n<p>echo \u201cin_array(): {$time1}\u79d2\\n\u201d; echo \u201carray_flip + isset(): {$time2}\u79d2\\n\u201d; \/\/ array_flip + isset\u306e\u65b9\u304c\u901a\u5e3810\u500d\u4ee5\u4e0a\u9ad8\u901f<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n#### 2. \u914d\u5217\u306e\u4e8b\u524d\u5272\u308a\u5f53\u3066\n\n\u8981\u7d20\u6570\u304c\u4e8b\u524d\u306b\u5206\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u6700\u521d\u306b\u914d\u5217\u306e\u30b5\u30a4\u30ba\u3092\u78ba\u4fdd\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u518d\u5272\u308a\u5f53\u3066\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u6e1b\u3089\u305b\u307e\u3059\u3002\n\n```php\n\/\/ \u60aa\u3044\u4f8b: \u30b5\u30a4\u30ba\u3092\u5f90\u3005\u306b\u62e1\u5f35\n$start = microtime(true);\n$array = [];\nfor ($i = 0; $i &lt; 100000; $i++) {\n    $array[] = $i; \/\/ \u5185\u90e8\u7684\u306b\u30b5\u30a4\u30ba\u306e\u518d\u5272\u308a\u5f53\u3066\u304c\u767a\u751f\n}\n$time1 = microtime(true) - $start;\n\n\/\/ \u826f\u3044\u4f8b: \u4e8b\u524d\u306b\u30b5\u30a4\u30ba\u3092\u78ba\u4fdd\uff08SplFixedArray\u3092\u4f7f\u7528\uff09\n$start = microtime(true);\n$array = new SplFixedArray(100000);\nfor ($i = 0; $i &lt; 100000; $i++) {\n    $array[$i] = $i;\n}\n$time2 = microtime(true) - $start;\n\necho \"\u901a\u5e38\u306e\u8ffd\u52a0: {$time1}\u79d2\\n\";\necho \"\u30b5\u30a4\u30ba\u4e8b\u524d\u78ba\u4fdd: {$time2}\u79d2\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-54\">3. \u30eb\u30fc\u30d7\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u914d\u5217\u51e6\u7406\u306e\u591a\u304f\u306f\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u30eb\u30fc\u30d7\u306e\u66f8\u304d\u65b9\u3067\u5b9f\u884c\u901f\u5ea6\u306b\u5dee\u304c\u51fa\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = range(1, 100000);\n\n\/\/ \u65b9\u6cd51: foreach\n$start = microtime(true);\n$sum = 0;\nforeach ($array as $value) {\n    $sum += $value;\n}\n$time1 = microtime(true) - $start;\n\n\/\/ \u65b9\u6cd52: for (\u30ab\u30a6\u30f3\u30c8\u8a08\u7b97\u30921\u56de\u3060\u3051)\n$start = microtime(true);\n$sum = 0;\n$count = count($array); \/\/ \u30eb\u30fc\u30d7\u5916\u30671\u56de\u3060\u3051\u8a08\u7b97\nfor ($i = 0; $i &lt; $count; $i++) {\n    $sum += $array[$i];\n}\n$time2 = microtime(true) - $start;\n\n\/\/ \u65b9\u6cd53: array_sum()\n$start = microtime(true);\n$\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-55\">PHP\u914d\u5217\u306e\u5b9f\u8df5\u7684\u5fdc\u7528\u4f8b<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u306e\u7ae0\u3067\u306f\u914d\u5217\u306e\u57fa\u672c\u3068\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u7ae0\u3067\u306fPHP\u914d\u5217\u306e\u5b9f\u8df5\u7684\u306a\u5fdc\u7528\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u5b9f\u52d9\u958b\u767a\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u72b6\u6cc1\u3067\u306e\u52b9\u679c\u7684\u306a\u914d\u5217\u306e\u4f7f\u3044\u65b9\u3092\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u5171\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-56\">JSON\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3051\u308b\u914d\u5217\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u73fe\u4ee3\u306eWeb\u958b\u767a\u3067\u306f\u3001JSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u306f\u65e5\u5e38\u7684\u306a\u30bf\u30b9\u30af\u3067\u3059\u3002PHP\u306e\u914d\u5217\u3068JSON\u306f\u975e\u5e38\u306b\u76f8\u6027\u304c\u826f\u304f\u3001\u30b9\u30e0\u30fc\u30ba\u306b\u76f8\u4e92\u5909\u63db\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-57\">JSON\u30c7\u30fc\u30bf\u306e\u89e3\u6790\u3068\u5909\u63db<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ API\u304b\u3089\u306eJSON\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u51e6\u7406\u3059\u308b\u4f8b\n$json_string = file_get_contents('https:\/\/api.example.com\/products');\n$products = json_decode($json_string, true); \/\/ \u7b2c2\u5f15\u6570\u3092true\u306b\u3059\u308b\u3068\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\n\n\/\/ \u30c7\u30fc\u30bf\u51e6\u7406\n$filtered_products = array_filter($products, function($product) {\n    return $product['in_stock'] &amp;&amp; $product['price'] &lt; 1000;\n});\n\n\/\/ \u5fc5\u8981\u306a\u9805\u76ee\u3060\u3051\u62bd\u51fa\n$simple_products = array_map(function($product) {\n    return [\n        'id' =&gt; $product['id'],\n        'name' =&gt; $product['name'],\n        'price' =&gt; $product['price']\n    ];\n}, $filtered_products);\n\n\/\/ JSON\u306b\u623b\u3059\n$output_json = json_encode($simple_products, JSON_PRETTY_PRINT);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-58\">\u30cd\u30b9\u30c8\u3055\u308c\u305fJSON\u30c7\u30fc\u30bf\u306e\u64cd\u4f5c<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u30cd\u30b9\u30c8\u69cb\u9020\u3092\u6301\u3064JSON\u30c7\u30fc\u30bf\u3092\u6271\u3046\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$json_string = &lt;&lt;&lt;JSON\n{\n    \"company\": \"Example Corp\",\n    \"departments\": [\n        {\n            \"name\": \"\u958b\u767a\u90e8\",\n            \"employees\": [\n                {\"id\": 101, \"name\": \"\u7530\u4e2d\", \"skills\": [\"PHP\", \"MySQL\", \"JavaScript\"]},\n                {\"id\": 102, \"name\": \"\u9234\u6728\", \"skills\": [\"Java\", \"Python\", \"PHP\"]}\n            ]\n        },\n        {\n            \"name\": \"\u55b6\u696d\u90e8\",\n            \"employees\": [\n                {\"id\": 201, \"name\": \"\u4f50\u85e4\", \"skills\": [\"\u55b6\u696d\", \"\u30d7\u30ec\u30bc\u30f3\", \"\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\"]}\n            ]\n        }\n    ]\n}\nJSON;\n\n$data = json_decode($json_string, true);\n\n\/\/ \u7279\u5b9a\u306e\u30b9\u30ad\u30eb\u3092\u6301\u3064\u5168\u793e\u54e1\u3092\u62bd\u51fa\u3059\u308b\n$php_developers = [];\n\nforeach ($data['departments'] as $department) {\n    foreach ($department['employees'] as $employee) {\n        if (in_array('PHP', $employee['skills'])) {\n            $php_developers[] = [\n                'id' =&gt; $employee['id'],\n                'name' =&gt; $employee['name'],\n                'department' =&gt; $department['name']\n            ];\n        }\n    }\n}\n\n\/\/ \u3088\u308a\u6d17\u7df4\u3055\u308c\u305f\u65b9\u6cd5\uff08PHP 7.4\u4ee5\u964d\uff09\n$php_developers = array_reduce(\n    $data['departments'],\n    function($result, $dept) {\n        $dept_name = $dept['name'];\n        $devs = array_filter($dept['employees'], fn($emp) =&gt; in_array('PHP', $emp['skills']));\n        $mapped = array_map(\n            fn($emp) =&gt; ['id' =&gt; $emp['id'], 'name' =&gt; $emp['name'], 'department' =&gt; $dept_name],\n            $devs\n        );\n        return array_merge($result, $mapped);\n    },\n    []\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-59\">JSON\u69cb\u9020\u306e\u69cb\u7bc9<\/h4>\n\n\n\n<p>API\u30ec\u30b9\u30dd\u30f3\u30b9\u306a\u3069\u3067\u3001\u8907\u96d1\u306aJSON\u69cb\u9020\u3092\u69cb\u7bc9\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u968e\u5c64\u7684\u306aJSON\u69cb\u9020\u306b\u5909\u63db\u3059\u308b\nfunction buildProductCatalog($categories) {\n    $catalog = [\n        'last_updated' =&gt; date('Y-m-d H:i:s'),\n        'categories' =&gt; []\n    ];\n    \n    foreach ($categories as $category) {\n        $cat_data = [\n            'id' =&gt; $category['id'],\n            'name' =&gt; $category['name'],\n            'products' =&gt; []\n        ];\n        \n        \/\/ \u30ab\u30c6\u30b4\u30ea\u306b\u5c5e\u3059\u308b\u5546\u54c1\u3092\u53d6\u5f97\n        $products = getProductsByCategory($category['id']);\n        \n        foreach ($products as $product) {\n            $cat_data['products'][] = [\n                'id' =&gt; $product['id'],\n                'name' =&gt; $product['name'],\n                'price' =&gt; $product['price'],\n                'description' =&gt; $product['description'],\n                'attributes' =&gt; json_decode($product['attributes'], true)\n            ];\n        }\n        \n        $catalog['categories'][] = $cat_data;\n    }\n    \n    return json_encode($catalog, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-60\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u52b9\u7387\u7684\u306a\u914d\u5217\u5909\u63db\u3068\u51e6\u7406<\/h3>\n\n\n\n<p>PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u914d\u5217\u306b\u5909\u63db\u3057\u3066\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u52b9\u7387\u7684\u306a\u5909\u63db\u3068\u51e6\u7406\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-61\">\u7d50\u679c\u30bb\u30c3\u30c8\u306e\u30b0\u30eb\u30fc\u30d7\u5316\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=\"\">\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u5e73\u5766\u306a\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u968e\u5c64\u69cb\u9020\u306b\u5909\u63db\u3059\u308b\u4f8b\n$query = \"SELECT o.id as order_id, o.order_date, o.customer_id, \n                 c.name as customer_name, c.email,\n                 oi.product_id, oi.quantity, oi.price,\n                 p.name as product_name\n          FROM orders o\n          JOIN customers c ON o.customer_id = c.id\n          JOIN order_items oi ON o.id = oi.order_id\n          JOIN products p ON oi.product_id = p.id\n          WHERE o.order_date &gt;= ?\";\n\n$stmt = $pdo-&gt;prepare($query);\n$stmt-&gt;execute(['2023-01-01']);\n$rows = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC);\n\n\/\/ \u5e73\u5766\u306a\u7d50\u679c\u3092\u968e\u5c64\u69cb\u9020\u306b\u5909\u63db\n$orders = [];\n\nforeach ($rows as $row) {\n    $order_id = $row['order_id'];\n    \n    \/\/ \u6ce8\u6587\u304c\u914d\u5217\u306b\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u8ffd\u52a0\n    if (!isset($orders[$order_id])) {\n        $orders[$order_id] = [\n            'order_id' =&gt; $order_id,\n            'order_date' =&gt; $row['order_date'],\n            'customer' =&gt; [\n                'id' =&gt; $row['customer_id'],\n                'name' =&gt; $row['customer_name'],\n                'email' =&gt; $row['email']\n            ],\n            'items' =&gt; []\n        ];\n    }\n    \n    \/\/ \u6ce8\u6587\u30a2\u30a4\u30c6\u30e0\u3092\u8ffd\u52a0\n    $orders[$order_id]['items'][] = [\n        'product_id' =&gt; $row['product_id'],\n        'product_name' =&gt; $row['product_name'],\n        'quantity' =&gt; $row['quantity'],\n        'price' =&gt; $row['price'],\n        'subtotal' =&gt; $row['quantity'] * $row['price']\n    ];\n}\n\n\/\/ \u6ce8\u6587\u3054\u3068\u306e\u5408\u8a08\u91d1\u984d\u3092\u8a08\u7b97\nforeach ($orders as &amp;$order) {\n    $order['total'] = array_sum(array_column($order['items'], 'subtotal'));\n}\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30d9\u30fc\u30b9\u306e\u914d\u5217\u306b\u5909\u63db\n$orders = array_values($orders);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-62\">\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u96c6\u8a08\u306e\u52b9\u7387\u7684\u306a\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=\"\">\/\/ \u8ca9\u58f2\u30c7\u30fc\u30bf\u3092\u6708\u5225\u30fb\u30ab\u30c6\u30b4\u30ea\u5225\u306b\u96c6\u8a08\u3059\u308b\u4f8b\n$query = \"SELECT EXTRACT(YEAR_MONTH FROM o.order_date) AS yearmonth,\n                 c.name as category,\n                 SUM(oi.quantity * oi.price) as total_sales\n          FROM orders o\n          JOIN order_items oi ON o.id = oi.order_id\n          JOIN products p ON oi.product_id = p.id\n          JOIN categories c ON p.category_id = c.id\n          WHERE o.status = 'completed'\n          GROUP BY yearmonth, c.name\n          ORDER BY yearmonth, total_sales DESC\";\n\n$rows = $pdo-&gt;query($query)-&gt;fetchAll(PDO::FETCH_ASSOC);\n\n\/\/ \u7d50\u679c\u3092\u6271\u3044\u3084\u3059\u3044\u69cb\u9020\u306b\u5909\u63db\n$sales_by_month = [];\n\nforeach ($rows as $row) {\n    $yearmonth = $row['yearmonth'];\n    $category = $row['category'];\n    $sales = $row['total_sales'];\n    \n    if (!isset($sales_by_month[$yearmonth])) {\n        $sales_by_month[$yearmonth] = [\n            'yearmonth' =&gt; $yearmonth,\n            'total' =&gt; 0,\n            'categories' =&gt; []\n        ];\n    }\n    \n    $sales_by_month[$yearmonth]['categories'][$category] = $sales;\n    $sales_by_month[$yearmonth]['total'] += $sales;\n}\n\n\/\/ \u6708\u3054\u3068\u306b\u4e0a\u4f4d3\u30ab\u30c6\u30b4\u30ea\u306e\u307f\u3092\u62bd\u51fa\nforeach ($sales_by_month as &amp;$month_data) {\n    arsort($month_data['categories']); \/\/ \u58f2\u4e0a\u9ad8\u3067\u964d\u9806\u30bd\u30fc\u30c8\n    $month_data['top_categories'] = array_slice($month_data['categories'], 0, 3, true);\n    \n    \/\/ \u305d\u306e\u4ed6\u306e\u30ab\u30c6\u30b4\u30ea\u3092\u300c\u305d\u306e\u4ed6\u300d\u3068\u3057\u3066\u307e\u3068\u3081\u308b\n    $other_sales = array_sum(array_slice($month_data['categories'], 3));\n    if ($other_sales &gt; 0) {\n        $month_data['top_categories']['\u305d\u306e\u4ed6'] = $other_sales;\n    }\n}\n\n\/\/ \u5e74\u6708\u3092\u4eba\u9593\u304c\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u306b\u5909\u63db\nforeach ($sales_by_month as &amp;$month_data) {\n    $year = substr($month_data['yearmonth'], 0, 4);\n    $month = substr($month_data['yearmonth'], 4, 2);\n    $month_data['display_date'] = $year . '\u5e74' . (int)$month . '\u6708';\n}\n\n$sales_by_month = array_values($sales_by_month);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-63\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u914d\u5217\u3067\u52b9\u679c\u7684\u306b\u6271\u3046\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304cAPI\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u969b\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\u306f\u91cd\u8981\u3067\u3059\u3002\u914d\u5217\u3092\u4f7f\u3063\u3066\u52b9\u679c\u7684\u306bAPI\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-64\">\u8907\u6570API\u304b\u3089\u306e\u30c7\u30fc\u30bf\u7d71\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=\"\">\/\/ \u8907\u6570\u306eAPI\u304b\u3089\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u7d71\u5408\u3059\u308b\u4f8b\nfunction fetchProductDetails($product_id) {\n    \/\/ \u57fa\u672c\u60c5\u5831\u3092\u53d6\u5f97\n    $basic_info = json_decode(file_get_contents(\n        \"https:\/\/api.example.com\/products\/{$product_id}\"\n    ), true);\n    \n    if (empty($basic_info)) {\n        return null;\n    }\n    \n    \/\/ \u5728\u5eab\u60c5\u5831\u3092\u53d6\u5f97\n    $inventory = json_decode(file_get_contents(\n        \"https:\/\/inventory.example.com\/status\/{$product_id}\"\n    ), true);\n    \n    \/\/ \u30ec\u30d3\u30e5\u30fc\u60c5\u5831\u3092\u53d6\u5f97\n    $reviews = json_decode(file_get_contents(\n        \"https:\/\/reviews.example.com\/product\/{$product_id}\"\n    ), true);\n    \n    \/\/ \u30c7\u30fc\u30bf\u3092\u7d71\u5408\n    $product = $basic_info;\n    $product['in_stock'] = $inventory['available'] ?? false;\n    $product['stock_count'] = $inventory['count'] ?? 0;\n    \n    \/\/ \u30ec\u30d3\u30e5\u30fc\u60c5\u5831\u306e\u8ffd\u52a0\n    $product['rating'] = [\n        'average' =&gt; $reviews['average'] ?? 0,\n        'count' =&gt; $reviews['count'] ?? 0\n    ];\n    \n    \/\/ \u6700\u65b0\u306e5\u4ef6\u306e\u30ec\u30d3\u30e5\u30fc\u3092\u8ffd\u52a0\n    $product['recent_reviews'] = array_slice($reviews['items'] ?? [], 0, 5);\n    \n    return $product;\n}\n\n\/\/ \u6539\u5584\u7248: \u975e\u540c\u671f\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f7f\u7528\uff08PHP\u62e1\u5f35curl\u304c\u5fc5\u8981\uff09\nfunction fetchProductDetailsAsync($product_id) {\n    \/\/ cURL\u30de\u30eb\u30c1\u30cf\u30f3\u30c9\u30eb\u3092\u521d\u671f\u5316\n    $mh = curl_multi_init();\n    $handles = [];\n    \n    \/\/ \u5404API\u3078\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u6e96\u5099\n    $apis = [\n        'basic' =&gt; \"https:\/\/api.example.com\/products\/{$product_id}\",\n        'inventory' =&gt; \"https:\/\/inventory.example.com\/status\/{$product_id}\",\n        'reviews' =&gt; \"https:\/\/reviews.example.com\/product\/{$product_id}\"\n    ];\n    \n    foreach ($apis as $key =&gt; $url) {\n        $handles[$key] = curl_init($url);\n        curl_setopt($handles[$key], CURLOPT_RETURNTRANSFER, true);\n        curl_multi_add_handle($mh, $handles[$key]);\n    }\n    \n    \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u884c\n    $running = null;\n    do {\n        curl_multi_exec($mh, $running);\n    } while ($running);\n    \n    \/\/ \u7d50\u679c\u3092\u53d6\u5f97\n    $responses = [];\n    foreach ($handles as $key =&gt; $handle) {\n        $responses[$key] = json_decode(curl_multi_getcontent($handle), true);\n        curl_multi_remove_handle($mh, $handle);\n    }\n    \n    curl_multi_close($mh);\n    \n    \/\/ \u30c7\u30fc\u30bf\u3092\u7d71\u5408\uff08\u524d\u8ff0\u3068\u540c\u69d8\uff09\n    $product = $responses['basic'] ?? [];\n    \n    if (empty($product)) {\n        return null;\n    }\n    \n    \/\/ \u5728\u5eab\u30c7\u30fc\u30bf\u306e\u7d71\u5408\n    if (isset($responses['inventory'])) {\n        $product['in_stock'] = $responses['inventory']['available'] ?? false;\n        $product['stock_count'] = $responses['inventory']['count'] ?? 0;\n    }\n    \n    \/\/ \u30ec\u30d3\u30e5\u30fc\u30c7\u30fc\u30bf\u306e\u7d71\u5408\n    if (isset($responses['reviews'])) {\n        $product['rating'] = [\n            'average' =&gt; $responses['reviews']['average'] ?? 0,\n            'count' =&gt; $responses['reviews']['count'] ?? 0\n        ];\n        $product['recent_reviews'] = array_slice($responses['reviews']['items'] ?? [], 0, 5);\n    }\n    \n    return $product;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-65\">\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u305fAPI\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u305fAPI\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u5168\u3066\u53d6\u5f97\u3059\u308b\nfunction fetchAllPages($base_url, $limit = 100) {\n    $all_items = [];\n    $page = 1;\n    $has_more = true;\n    \n    while ($has_more) {\n        $url = \"{$base_url}?page={$page}&amp;limit={$limit}\";\n        $response = json_decode(file_get_contents($url), true);\n        \n        if (!empty($response['items'])) {\n            $all_items = array_merge($all_items, $response['items']);\n        }\n        \n        $has_more = !empty($response['has_more']) &amp;&amp; $response['has_more'] === true;\n        $page++;\n        \n        \/\/ API\u30ec\u30fc\u30c8\u5236\u9650\u306b\u914d\u616e\n        if ($has_more) {\n            sleep(1);\n        }\n    }\n    \n    return $all_items;\n}\n\n\/\/ \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u5b9f\u88c5\nfunction streamAllPages($base_url, $limit = 100) {\n    $page = 1;\n    $has_more = true;\n    \n    while ($has_more) {\n        $url = \"{$base_url}?page={$page}&amp;limit={$limit}\";\n        $response = json_decode(file_get_contents($url), true);\n        \n        if (!empty($response['items'])) {\n            foreach ($response['items'] as $item) {\n                yield $item; \/\/ 1\u30a2\u30a4\u30c6\u30e0\u305a\u3064\u8fd4\u3059\n            }\n        } else {\n            break;\n        }\n        \n        $has_more = !empty($response['has_more']) &amp;&amp; $response['has_more'] === true;\n        $page++;\n        \n        \/\/ API\u30ec\u30fc\u30c8\u5236\u9650\u306b\u914d\u616e\n        if ($has_more) {\n            sleep(1);\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$all_users = [];\nforeach (streamAllPages('https:\/\/api.example.com\/users') as $user) {\n    \/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u826f\u304f\u51e6\u7406\u3067\u304d\u308b\n    processUser($user);\n    $all_users[] = $user;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-66\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u691c\u8a3c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getCachedApiData($url, $cache_time = 3600) {\n    $cache_file = 'cache\/' . md5($url) . '.json';\n    \n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u6709\u52b9\u304b\u30c1\u30a7\u30c3\u30af\n    if (file_exists($cache_file) &amp;&amp; (time() - filemtime($cache_file) &lt; $cache_time)) {\n        return json_decode(file_get_contents($cache_file), true);\n    }\n    \n    \/\/ \u65b0\u3057\u3044\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n    $curl = curl_init($url);\n    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);\n    $response = curl_exec($curl);\n    $http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);\n    curl_close($curl);\n    \n    \/\/ \u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\n    if ($http_code !== 200 || empty($response)) {\n        \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u5b58\u5728\u3059\u308c\u3070\u671f\u9650\u5207\u308c\u3067\u3082\u4f7f\u7528\n        if (file_exists($cache_file)) {\n            return json_decode(file_get_contents($cache_file), true);\n        }\n        \n        \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n        return ['error' =&gt; true, 'message' =&gt; 'API request failed'];\n    }\n    \n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u306a\u3051\u308c\u3070\u4f5c\u6210\n    if (!is_dir('cache')) {\n        mkdir('cache', 0755, true);\n    }\n    \n    \/\/ \u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\n    $data = json_decode($response, true);\n    file_put_contents($cache_file, $response);\n    \n    return $data;\n}\n\n\/\/ \u8907\u6570\u306eAPI\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u304b\u3089\u4e26\u5217\u306b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\nfunction getMultipleApiData($urls, $cache_time = 3600) {\n    $results = [];\n    \n    foreach ($urls as $key =&gt; $url) {\n        $results[$key] = getCachedApiData($url, $cache_time);\n    }\n    \n    return $results;\n}\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u72b6\u6cc1\u3092\u53cd\u6620\u3057\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u306e\u67d4\u8edf\u6027\u3092\u6d3b\u304b\u3059\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3082\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u306f\u3001\u914d\u5217\u64cd\u4f5c\u6642\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u3001\u305d\u306e\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-67\">PHP\u914d\u5217\u306b\u95a2\u3059\u308b\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h2>\n\n\n\n<p>PHP\u914d\u5217\u306f\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u4f7f\u7528\u65b9\u6cd5\u3092\u8aa4\u308b\u3068\u69d8\u3005\u306a\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u958b\u767a\u8005\u304c\u3088\u304f\u906d\u9047\u3059\u308b\u914d\u5217\u95a2\u9023\u306e\u554f\u984c\u3068\u3001\u305d\u308c\u3089\u306e\u52b9\u679c\u7684\u306a\u89e3\u6c7a\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-68\">\u914d\u5217\u64cd\u4f5c\u6642\u306e\u5178\u578b\u7684\u306a\u30a8\u30e9\u30fc\u3068\u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-69\">1. \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/h4>\n\n\n\n<p>\u914d\u5217\u5185\u306b\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\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=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\n$user = ['name' =&gt; '\u5c71\u7530', 'age' =&gt; 30];\necho $user['email']; \/\/ Warning: Undefined array key \"email\"\n\n\/\/ \u89e3\u6c7a\u7b561: isset()\u3067\u30c1\u30a7\u30c3\u30af\nif (isset($user['email'])) {\n    echo $user['email'];\n} else {\n    echo '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n}\n\n\/\/ \u89e3\u6c7a\u7b562: array_key_exists()\u3067\u30c1\u30a7\u30c3\u30af\nif (array_key_exists('email', $user)) {\n    echo $user['email'];\n} else {\n    echo '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n}\n\n\/\/ \u89e3\u6c7a\u7b563: Null\u5408\u4f53\u6f14\u7b97\u5b50\uff08PHP 7\u4ee5\u964d\uff09\necho $user['email'] ?? '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093';\n<\/pre>\n\n\n\n<p><strong>\u6ce8\u610f<\/strong>: <code>isset()<\/code>\u3068<code>array_key_exists()<\/code>\u306e\u9055\u3044\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>isset()<\/code>: \u30ad\u30fc\u304c\u5b58\u5728\u3057\u3066\u5024\u304cNULL\u3067\u306a\u3044\u5834\u5408\u306btrue\u3092\u8fd4\u3059<\/li>\n\n\n\n<li><code>array_key_exists()<\/code>: \u5024\u304cNULL\u3067\u3082\u3001\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308c\u3070true\u3092\u8fd4\u3059<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-70\">2. \u914d\u5217\u3068\u6587\u5b57\u5217\u306e\u6df7\u540c<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u6587\u5b57\u5217\u3092\u914d\u5217\u306e\u3088\u3046\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u304c\u3001\u9006\u306b\u914d\u5217\u3092\u6587\u5b57\u5217\u306e\u3088\u3046\u306b\u6271\u3046\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6587\u5b57\u5217\u3092\u914d\u5217\u306e\u3088\u3046\u306b\u6271\u3046\uff08\u554f\u984c\u306a\u3057\uff09\n$str = \"Hello\";\necho $str[0]; \/\/ \u51fa\u529b: H\n\n\/\/ \u914d\u5217\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u6271\u3046\uff08\u30a8\u30e9\u30fc\uff09\n$arr = [1, 2, 3];\necho \"Value: $arr\"; \/\/ Warning: Array to string conversion\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u8868\u793a\u3059\u308b\u5834\u5408\u306f\u660e\u793a\u7684\u306b\u5909\u63db\n$arr = [1, 2, 3];\necho \"Value: \" . implode(', ', $arr); \/\/ \u51fa\u529b: Value: 1, 2, 3\n\n\/\/ \u30c7\u30d0\u30c3\u30b0\u76ee\u7684\u306a\u3089\necho \"Value: \" . print_r($arr, true);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-71\">3. \u53c2\u7167\u306b\u3088\u308b\u914d\u5217\u64cd\u4f5c\u306e\u30d0\u30b0<\/h4>\n\n\n\n<p>\u53c2\u7167\uff08<code>&amp;<\/code>\uff09\u3092\u4f7f\u3063\u305f\u914d\u5217\u64cd\u4f5c\u306f\u3001\u610f\u56f3\u3057\u306a\u3044\u526f\u4f5c\u7528\u3092\u5f15\u304d\u8d77\u3053\u3059\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=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\n$numbers = [1, 2, 3, 4];\nforeach ($numbers as &amp;$num) {\n    $num *= 2;\n}\n\/\/ \u3053\u306e\u6642\u70b9\u3067$num\u306f$numbers[3]\u3078\u306e\u53c2\u7167\n\nforeach ($numbers as $num) {\n    echo $num . ' ';\n} \/\/ \u51fa\u529b: 2 4 6 4\uff08\u6700\u5f8c\u306e\u8981\u7d20\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3046\uff01\uff09\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a\u53c2\u7167\u3092\u4f7f\u3063\u305f\u5f8c\u306f<code>unset()<\/code>\u3067\u30ea\u30bb\u30c3\u30c8<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4];\nforeach ($numbers as &amp;$num) {\n    $num *= 2;\n}\nunset($num); \/\/ \u53c2\u7167\u3092\u89e3\u9664\n\nforeach ($numbers as $num) {\n    echo $num . ' ';\n} \/\/ \u51fa\u529b: 2 4 6 8\uff08\u671f\u5f85\u901a\u308a\uff09\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-72\">4. \u914d\u5217\u64cd\u4f5c\u5f8c\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u554f\u984c<\/h4>\n\n\n\n<p><code>unset()<\/code>\u3067\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u3068\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u81ea\u52d5\u7684\u306b\u632f\u308a\u76f4\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\n$fruits = ['apple', 'banana', 'orange', 'grape'];\nunset($fruits[1]); \/\/ banana\u3092\u524a\u9664\n\nprint_r($fruits);\n\/*\nArray (\n    [0] =&gt; apple\n    [2] =&gt; orange\n    [3] =&gt; grape\n)\n*\/\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u304c\u306a\u304f\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u4e88\u671f\u3057\u306a\u3044\u7d50\u679c\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a<code>array_values()<\/code>\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3059<\/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=\"\">$fruits = ['apple', 'banana', 'orange', 'grape'];\nunset($fruits[1]);\n$fruits = array_values($fruits); \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u632f\u308a\u76f4\u3057\n\nprint_r($fruits);\n\/*\nArray (\n    [0] =&gt; apple\n    [1] =&gt; orange\n    [2] =&gt; grape\n)\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-73\">5. \u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3068\u95a2\u6570<\/h4>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u3092\u30c7\u30d0\u30c3\u30b0\u3059\u308b\u305f\u3081\u306e\u4fbf\u5229\u306a\u95a2\u6570\u3068\u30c6\u30af\u30cb\u30c3\u30af\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\n$data = ['name' =&gt; '\u9234\u6728', 'details' =&gt; ['age' =&gt; 25, 'city' =&gt; '\u6771\u4eac']];\n\n\/\/ var_dump(): \u578b\u60c5\u5831\u3092\u542b\u3080\u8a73\u7d30\u306a\u51fa\u529b\nvar_dump($data);\n\n\/\/ print_r(): \u4eba\u9593\u304c\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\nprint_r($data);\n\n\/\/ HTML\u30da\u30fc\u30b8\u5185\u3067\u306e\u30c7\u30d0\u30c3\u30b0\necho '&lt;pre&gt;' . print_r($data, true) . '&lt;\/pre&gt;';\n\n\/\/ JSON\u3068\u3057\u3066\u51fa\u529b\necho json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);\n\n\/\/ \u30c7\u30d0\u30c3\u30b0\u5c02\u7528\u306e\u95a2\u6570\u3092\u4f5c\u6210\nfunction debug($var, $exit = false) {\n    echo '&lt;pre&gt;';\n    var_dump($var);\n    echo '&lt;\/pre&gt;';\n    if ($exit) exit;\n}\n\n\/\/ \u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\n$debug = function($data) { return $data; };\n$result = array_map(function($x) use ($debug) {\n    $processed = process($x);\n    $debug($processed); \/\/ \u4e2d\u9593\u7d50\u679c\u3092\u78ba\u8a8d\n    return $processed;\n}, $array);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-74\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u914d\u5217\u4f7f\u7528\u306e\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u914d\u5217\u306e\u4e0d\u9069\u5207\u306a\u4f7f\u7528\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u554f\u984c\u3084\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u306a\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u7b56\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-75\">1. \u6df1\u3059\u304e\u308b\u30cd\u30b9\u30c8\u69cb\u9020<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3: \u6df1\u3059\u304e\u308b\u30cd\u30b9\u30c8\n$data = [\n    'users' =&gt; [\n        'admin' =&gt; [\n            'permissions' =&gt; [\n                'modules' =&gt; [\n                    'reports' =&gt; [\n                        'actions' =&gt; [\n                            'create' =&gt; true,\n                            'read' =&gt; true,\n                            'update' =&gt; true,\n                            'delete' =&gt; true\n                        ]\n                    ]\n                ]\n            ]\n        ]\n    ]\n];\n\n\/\/ \u30a2\u30af\u30bb\u30b9\u304c\u5197\u9577\u3067\u8aad\u307f\u306b\u304f\u3044\nif (isset($data['users']['admin']['permissions']['modules']['reports']['actions']['delete'])) {\n    \/\/ \u51e6\u7406...\n}\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a\u5e73\u5766\u306a\u69cb\u9020\u306b\u5909\u66f4\u3059\u308b<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u3088\u308a\u826f\u3044\u8a2d\u8a08: \u30c9\u30c3\u30c8\u8a18\u6cd5\u3084\u30d1\u30b9\u5f62\u5f0f\u306e\u30ad\u30fc\u3092\u4f7f\u7528\n$permissions = [\n    'users.admin.reports.create' =&gt; true,\n    'users.admin.reports.read' =&gt; true,\n    'users.admin.reports.update' =&gt; true,\n    'users.admin.reports.delete' =&gt; true\n];\n\n\/\/ \u30a2\u30af\u30bb\u30b9\u304c\u7c21\u5358\nif (isset($permissions['users.admin.reports.delete'])) {\n    \/\/ \u51e6\u7406...\n}\n\n\/\/ \u307e\u305f\u306f\u5c02\u7528\u306e\u30a2\u30af\u30bb\u30b5\u95a2\u6570\u3092\u7528\u610f\nfunction hasPermission($permissions, $path) {\n    return isset($permissions[$path]);\n}\n\nif (hasPermission($permissions, 'users.admin.reports.delete')) {\n    \/\/ \u51e6\u7406...\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-76\">2. \u914d\u5217\u306e\u904e\u5270\u4f7f\u7528\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3092\u7121\u8996\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=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3: \u3059\u3079\u3066\u3092\u914d\u5217\u3067\u8868\u73fe\n$user = [\n    'id' =&gt; 1,\n    'name' =&gt; '\u7530\u4e2d',\n    'email' =&gt; 'tanaka@example.com',\n    'roles' =&gt; ['admin', 'editor'],\n    'permissions' =&gt; [\n        'create_post' =&gt; true,\n        'edit_user' =&gt; true\n    ]\n];\n\n\/\/ \u6a5f\u80fd\u8ffd\u52a0\u306e\u305f\u3073\u306b\u914d\u5217\u304c\u80a5\u5927\u5316\n$user['last_login'] = time();\n$user['preferences'] = [\n    'theme' =&gt; 'dark',\n    'notifications' =&gt; true\n];\n\n\/\/ \u4e00\u8cab\u6027\u3092\u4fdd\u3064\u306e\u304c\u96e3\u3057\u3044\nfunction updateUser($user, $data) {\n    \/\/ \u3069\u306e\u30ad\u30fc\u304c\u6709\u52b9\u304b\u628a\u63e1\u3057\u3065\u3089\u3044\n    return array_merge($user, $data);\n}\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a\u9069\u5207\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u3092\u4f7f\u7528<\/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=\"\">\/\/ \u3088\u308a\u826f\u3044\u8a2d\u8a08: \u30af\u30e9\u30b9\u3092\u4f7f\u7528\nclass User {\n    private $id;\n    private $name;\n    private $email;\n    private $roles = [];\n    private $permissions = [];\n    private $lastLogin;\n    private $preferences;\n    \n    \/\/ \u30b2\u30c3\u30bf\u30fc\/\u30bb\u30c3\u30bf\u30fc\n    public function getId() { return $this-&gt;id; }\n    public function getName() { return $this-&gt;name; }\n    public function setName($name) { $this-&gt;name = $name; }\n    \/\/ \u305d\u306e\u4ed6\u306e\u30b2\u30c3\u30bf\u30fc\/\u30bb\u30c3\u30bf\u30fc...\n    \n    \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\n    public function hasRole($role) {\n        return in_array($role, $this-&gt;roles);\n    }\n    \n    public function hasPermission($permission) {\n        return isset($this-&gt;permissions[$permission]) &amp;&amp; $this-&gt;permissions[$permission];\n    }\n    \n    \/\/ \u914d\u5217\u3078\u306e\u5909\u63db\uff08\u5fc5\u8981\u306a\u5834\u5408\uff09\n    public function toArray() {\n        return [\n            'id' =&gt; $this-&gt;id,\n            'name' =&gt; $this-&gt;name,\n            'email' =&gt; $this-&gt;email,\n            \/\/ \u305d\u306e\u4ed6\u306e\u30d7\u30ed\u30d1\u30c6\u30a3...\n        ];\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-77\">3. \u540c\u3058\u914d\u5217\u69cb\u9020\u306e\u7e70\u308a\u8fd4\u3057\u5b9a\u7fa9<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3: \u985e\u4f3c\u69cb\u9020\u3092\u6bce\u56de\u5b9a\u7fa9\nfunction getUserData($userId) {\n    \/\/ \u30c7\u30fc\u30bf\u53d6\u5f97\u51e6\u7406...\n    return [\n        'id' =&gt; $id,\n        'name' =&gt; $name,\n        'email' =&gt; $email,\n        'created_at' =&gt; $created_at\n    ];\n}\n\nfunction getAdminData($adminId) {\n    \/\/ \u30c7\u30fc\u30bf\u53d6\u5f97\u51e6\u7406...\n    return [\n        'id' =&gt; $id,\n        'name' =&gt; $name,\n        'email' =&gt; $email,\n        'created_at' =&gt; $created_at,\n        'permissions' =&gt; $permissions\n    ];\n}\n\n\/\/ \u69cb\u9020\u306e\u4e00\u8cab\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u306a\u3044\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a\u69cb\u9020\u5b9a\u7fa9\u3092\u5171\u901a\u5316<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u3088\u308a\u826f\u3044\u8a2d\u8a08: \u57fa\u672c\u69cb\u9020\u3092\u95a2\u6570\u5316\nfunction createUserArray($id, $name, $email, $created_at, $extra = []) {\n    $base = [\n        'id' =&gt; $id,\n        'name' =&gt; $name,\n        'email' =&gt; $email,\n        'created_at' =&gt; $created_at\n    ];\n    \n    return array_merge($base, $extra);\n}\n\nfunction getUserData($userId) {\n    \/\/ \u30c7\u30fc\u30bf\u53d6\u5f97\u51e6\u7406...\n    return createUserArray($id, $name, $email, $created_at);\n}\n\nfunction getAdminData($adminId) {\n    \/\/ \u30c7\u30fc\u30bf\u53d6\u5f97\u51e6\u7406...\n    return createUserArray($id, $name, $email, $created_at, [\n        'permissions' =&gt; $permissions\n    ]);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-78\">4. \u5927\u91cf\u306e\u914d\u5217\u30df\u30e5\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3: \u914d\u5217\u306e\u904e\u5270\u306a\u5909\u66f4\nfunction processData($data) {\n    \/\/ 1. \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n    $filtered = [];\n    foreach ($data as $item) {\n        if ($item['status'] === 'active') {\n            $filtered[] = $item;\n        }\n    }\n    \n    \/\/ 2. \u5909\u63db\n    $transformed = [];\n    foreach ($filtered as $item) {\n        $transformed[] = [\n            'id' =&gt; $item['id'],\n            'full_name' =&gt; $item['first_name'] . ' ' . $item['last_name'],\n            'email' =&gt; $item['email']\n        ];\n    }\n    \n    \/\/ 3. \u30bd\u30fc\u30c8\n    usort($transformed, function($a, $b) {\n        return strcmp($a['full_name'], $b['full_name']);\n    });\n    \n    \/\/ 4. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u3051\n    $indexed = [];\n    foreach ($transformed as $item) {\n        $indexed[$item['id']] = $item;\n    }\n    \n    return $indexed;\n}\n\/\/ \u8907\u6570\u306e\u4e2d\u9593\u914d\u5217\u304c\u751f\u6210\u3055\u308c\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u60aa\u3044\n<\/pre>\n\n\n\n<p>\u89e3\u6c7a\u7b56\uff1a\u30c1\u30a7\u30a4\u30f3\u64cd\u4f5c\u307e\u305f\u306f\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u51e6\u7406<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u3088\u308a\u826f\u3044\u8a2d\u8a08: \u30c1\u30a7\u30a4\u30f3\u51e6\u7406\uff08PHP 7.4\u4ee5\u964d\uff09\nfunction processData($data) {\n    return array_reduce(\n        \/\/ 1. &amp; 2. \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u5909\u63db\u3092\u4e00\u5ea6\u306b\n        array_filter($data, fn($item) =&gt; $item['status'] === 'active'),\n        function($result, $item) {\n            $id = $item['id'];\n            $result[$id] = [\n                'id' =&gt; $id,\n                'full_name' =&gt; $item['first_name'] . ' ' . $item['last_name'],\n                'email' =&gt; $item['email']\n            ];\n            return $result;\n        },\n        []\n    );\n}\n\n\/\/ \u307e\u305f\u306f\u3001\u51e6\u7406\u3092\u5c0f\u3055\u306a\u95a2\u6570\u306b\u5206\u5272\u3057\u3066\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u5316\nfunction filterActive($data) {\n    return array_filter($data, function($item) {\n        return $item['status'] === 'active';\n    });\n}\n\nfunction transformData($items) {\n    return array_map(function($item) {\n        return [\n            'id' =&gt; $item['id'],\n            'full_name' =&gt; $item['first_name'] . ' ' . $item['last_name'],\n            'email' =&gt; $item['email']\n        ];\n    }, $items);\n}\n\nfunction sortByName($items) {\n    usort($items, function($a, $b) {\n        return strcmp($a['full_name'], $b['full_name']);\n    });\n    return $items;\n}\n\nfunction indexById($items) {\n    $result = [];\n    foreach ($items as $item) {\n        $result[$item['id']] = $item;\n    }\n    return $result;\n}\n\n\/\/ \u4f7f\u7528\n$result = indexById(sortByName(transformData(filterActive($data))));\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-79\">\u914d\u5217\u51e6\u7406\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n\n\n\n<p>\u914d\u5217\u306b\u95a2\u3059\u308b\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u52b9\u7387\u7684\u306b\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-80\">\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u78ba\u8a8d<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u914d\u5217\u306e\u5b9f\u969b\u306e\u69cb\u9020\u3092<code>print_r()<\/code>\u3084<code>var_dump()<\/code>\u3067\u78ba\u8a8d\u3057\u305f\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u671f\u5f85\u3057\u3066\u3044\u308b\u69cb\u9020\u3068\u5b9f\u969b\u306e\u69cb\u9020\u306f\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u591a\u6b21\u5143\u914d\u5217\u306e\u5834\u5408\u3001\u3059\u3079\u3066\u306e\u30ec\u30d9\u30eb\u306e\u69cb\u9020\u306f\u671f\u5f85\u901a\u308a\u304b\uff1f<\/li>\n\n\n\n<li>[ ] <code>is_array()<\/code>\u3067\u672c\u5f53\u306b\u914d\u5217\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f\u304b\uff1f\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306e\u6df7\u540c\u3092\u907f\u3051\u308b\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-81\">\u30ad\u30fc\u30fb\u5024\u306e\u30a2\u30af\u30bb\u30b9\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u914d\u5217\u306b\u671f\u5f85\u3059\u308b\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b<code>isset()<\/code>\u307e\u305f\u306f<code>array_key_exists()<\/code>\u3067\u78ba\u8a8d\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u6570\u5024\u30ad\u30fc\u3068\u6587\u5b57\u5217\u30ad\u30fc\u306e\u6df7\u5728\u306b\u3088\u308b\u554f\u984c\u306f\u306a\u3044\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u4e88\u671f\u305b\u306c\u30ad\u30e3\u30b9\u30c8\uff08\u6587\u5b57\u5217 \u2192 \u6570\u5024\u306a\u3069\uff09\u304c\u767a\u751f\u3057\u3066\u3044\u306a\u3044\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u914d\u5217\u64cd\u4f5c\u5f8c\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u30ea\u30bb\u30c3\u30c8\u3059\u3079\u304d\u304b\u691c\u8a0e\u3057\u305f\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-82\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092<code>memory_get_usage()<\/code>\u3067\u30e2\u30cb\u30bf\u30fc\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u914d\u5217\u64cd\u4f5c\u306e\u5185\u90e8\u30eb\u30fc\u30d7\u306f\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u4e0d\u8981\u306a\u4e2d\u9593\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u3044\u306a\u3044\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u5927\u304d\u306a\u914d\u5217\u306f\u53c2\u7167\u6e21\u3057\uff08<code>&amp;<\/code>\uff09\u3092\u4f7f\u7528\u3057\u3066\u53d7\u3051\u6e21\u3057\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-83\">\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] <code>foreach<\/code>\u30eb\u30fc\u30d7\u3067\u306e\u53c2\u7167\uff08<code>&amp;<\/code>\uff09\u3092\u4f7f\u7528\u3057\u305f\u5f8c\u3001<code>unset()<\/code>\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u306b\u3088\u308b\u554f\u984c\u306f\u306a\u3044\u304b\uff1f<\/li>\n\n\n\n<li>[ ] <code>array_merge()<\/code>\u3067\u540c\u3058\u30ad\u30fc\u3092\u6301\u3064\u914d\u5217\u3092\u30de\u30fc\u30b8\u3059\u308b\u969b\u306e\u4e0a\u66f8\u304d\u554f\u984c\u306b\u6ce8\u610f\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] JSON\u30c7\u30fc\u30bf\u306e<code>json_decode()<\/code>\u6642\u306b\u7b2c2\u5f15\u6570\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] Null\u5408\u4f53\u6f14\u7b97\u5b50\uff08<code>??<\/code>\uff09\u3068\u4e09\u9805\u6f14\u7b97\u5b50\uff08<code>?:<\/code>\uff09\u3092\u6df7\u540c\u3057\u3066\u3044\u306a\u3044\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-84\">\u30b3\u30fc\u30c9\u306e\u660e\u78ba\u3055<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u914d\u5217\u306e\u751f\u6210\u3001\u30a2\u30af\u30bb\u30b9\u3001\u64cd\u4f5c\u304c\u4e00\u8cab\u3057\u305f\u30b9\u30bf\u30a4\u30eb\u3067\u8a18\u8ff0\u3055\u308c\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u5927\u304d\u306a\u914d\u5217\u64cd\u4f5c\u306f\u5c0f\u3055\u306a\u95a2\u6570\u306b\u5206\u5272\u3055\u308c\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u5909\u6570\u540d\u306f\u914d\u5217\u306e\u5185\u5bb9\u3084\u7528\u9014\u3092\u9069\u5207\u306b\u53cd\u6620\u3057\u3066\u3044\u308b\u304b\uff1f<\/li>\n\n\n\n<li>[ ] \u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u306b\u306f\u30b3\u30e1\u30f3\u30c8\u3092\u4ed8\u3051\u3066\u3044\u308b\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u306f\u3001\u914d\u5217\u95a2\u9023\u306e\u554f\u984c\u306e\u5927\u90e8\u5206\u3092\u52b9\u7387\u7684\u306b\u7279\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u4f53\u7cfb\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-85\">\u6700\u65b0PHP\uff08PHP 8.x\uff09\u3067\u306e\u914d\u5217\u6a5f\u80fd\u5f37\u5316<\/h2>\n\n\n\n<p>PHP 8\u30b7\u30ea\u30fc\u30ba\uff088.0\u30018.1\u30018.2\u30018.3\uff09\u3067\u306f\u3001\u8a00\u8a9e\u5168\u4f53\u306b\u591a\u304f\u306e\u6539\u5584\u304c\u306a\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u305d\u306e\u4e2d\u3067\u3082\u914d\u5217\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u6a5f\u80fd\u5f37\u5316\u306f\u7279\u306b\u6ce8\u76ee\u306b\u5024\u3057\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306ePHP\u3067\u5c0e\u5165\u3055\u308c\u305f\u914d\u5217\u95a2\u9023\u306e\u65b0\u6a5f\u80fd\u3068\u3001\u305d\u308c\u3089\u3092\u6d3b\u7528\u3057\u305f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6280\u8853\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-86\">PHP 8.x\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u3057\u3044\u914d\u5217\u64cd\u4f5c\u6a5f\u80fd<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-87\">PHP 8.0\u306e\u914d\u5217\u95a2\u9023\u6a5f\u80fd<\/h4>\n\n\n\n<p>PHP 8.0\u3067\u306f\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u3001\u914d\u5217\u64cd\u4f5c\u304c\u3088\u308a\u4fbf\u5229\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-88\">1. \u30de\u30c3\u30c1\u5f0f\uff08Match Expression\uff09<\/h5>\n\n\n\n<p><code>switch<\/code>\u6587\u306e\u5f37\u5316\u7248\u3068\u3057\u3066\u5c0e\u5165\u3055\u308c\u305f\u30de\u30c3\u30c1\u5f0f\u306f\u3001\u914d\u5217\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5f37\u529b\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3084\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u5b9f\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=\"\">\/\/ PHP 7 (switch\u6587)\nfunction getStatusMessage($status) {\n    switch ($status) {\n        case 200:\n            return 'OK';\n        case 404:\n            return 'Not Found';\n        case 500:\n            return 'Server Error';\n        default:\n            return 'Unknown Status';\n    }\n}\n\n\/\/ PHP 8 (match\u5f0f)\nfunction getStatusMessage($status) {\n    return match ($status) {\n        200 =&gt; 'OK',\n        404 =&gt; 'Not Found',\n        500 =&gt; 'Server Error',\n        default =&gt; 'Unknown Status',\n    };\n}\n\n\/\/ \u914d\u5217\u3068match\u306e\u7d44\u307f\u5408\u308f\u305b\n$statuses = [200, 404, 500, 302];\n$messages = array_map(\n    fn ($status) =&gt; match ($status) {\n        200, 204 =&gt; 'Success',\n        404, 410 =&gt; 'Not Found',\n        500, 503 =&gt; 'Server Error',\n        default =&gt; 'Other',\n    },\n    $statuses\n);\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-89\">2. Nullsafe\u6f14\u7b97\u5b50\uff08Nullsafe Operator\uff09<\/h5>\n\n\n\n<p>\u914d\u5217\u306e\u4e2d\u3067\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5b58\u5728\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7\n$country = null;\nif (isset($user) &amp;&amp; isset($user['address']) &amp;&amp; isset($user['address']['country'])) {\n    $country = $user['address']['country'];\n}\n\n\/\/ PHP 8\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u306e\u307f\u4f7f\u7528\u53ef\u80fd\uff08\u914d\u5217\u306b\u306f\u76f4\u63a5\u4f7f\u3048\u306a\u3044\uff09\n$user = (object)['address' =&gt; (object)['country' =&gt; 'Japan']];\n$country = $user?-&gt;address?-&gt;country;\n\n\/\/ \u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6df7\u5728\u3057\u305f\u69cb\u9020\n$data = [\n    'user' =&gt; (object)[\n        'profile' =&gt; (object)[\n            'settings' =&gt; ['theme' =&gt; 'dark']\n        ]\n    ]\n];\n\n$theme = $data['user']?-&gt;profile?-&gt;settings['theme'] ?? 'default';\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-90\">3. \u540d\u524d\u4ed8\u304d\u5f15\u6570\uff08Named Arguments\uff09<\/h5>\n\n\n\n<p>\u914d\u5217\u95a2\u6570\u3092\u4f7f\u3046\u969b\u306b\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7\n$filtered = array_filter($users, function($user) {\n    return $user['age'] &gt;= 18;\n}, ARRAY_FILTER_USE_BOTH);\n\n\/\/ PHP 8 \u540d\u524d\u4ed8\u304d\u5f15\u6570\n$filtered = array_filter(\n    array: $users,\n    callback: fn($user) =&gt; $user['age'] &gt;= 18,\n    mode: ARRAY_FILTER_USE_BOTH\n);\n\n\/\/ \u7279\u5b9a\u306e\u5f15\u6570\u3060\u3051\u3092\u6307\u5b9a\n$keys = array_keys(\n    array: $data,\n    filter_value: 'active',  \/\/ \u7279\u5b9a\u306e\u5024\u3092\u6301\u3064\u30ad\u30fc\u306e\u307f\u3092\u53d6\u5f97\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-91\">PHP 8.1\u306e\u914d\u5217\u95a2\u9023\u6a5f\u80fd<\/h4>\n\n\n\n<p>PHP 8.1\u3067\u3082\u3001\u914d\u5217\u64cd\u4f5c\u306b\u5f79\u7acb\u3064\u65b0\u6a5f\u80fd\u304c\u3044\u304f\u3064\u304b\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-92\">1. \u6700\u521d\u306e\u30af\u30e9\u30b9Callable\u69cb\u6587<\/h5>\n\n\n\n<p>\u914d\u5217\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u3088\u308a\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0\u307e\u3067\n$userIds = array_map([$userObject, 'getId'], $users);\n\n\/\/ PHP 8.1\u4ee5\u964d\n$userIds = array_map($userObject-&gt;getId(...), $users);\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-93\">2. \u8aad\u307f\u53d6\u308a\u5c02\u7528\u30d7\u30ed\u30d1\u30c6\u30a3<\/h5>\n\n\n\n<p>\u30af\u30e9\u30b9\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3057\u3066\u914d\u5217\u3092\u5b89\u5168\u306b\u516c\u958b\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=\"\">class Configuration {\n    \/\/ \u8aad\u307f\u53d6\u308a\u5c02\u7528\u306e\u516c\u958b\u914d\u5217\u30d7\u30ed\u30d1\u30c6\u30a3\n    public readonly array $options;\n    \n    public function __construct(array $options) {\n        $this-&gt;options = $options;\n        \/\/ \u3053\u306e\u5f8c\u3001$this-&gt;options\u306f\u5909\u66f4\u3067\u304d\u306a\u3044\n    }\n}\n\n$config = new Configuration(['debug' =&gt; true, 'cache' =&gt; false]);\n\/\/ $config-&gt;options['debug'] = false; \/\/ Fatal error: Cannot modify readonly property\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-94\">3. \u914d\u5217\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306e\u30ad\u30fc\u4fdd\u6301<\/h5>\n\n\n\n<p>PHP 8.1\u3067\u306f\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08<code>...<\/code>\uff09\u304c\u6587\u5b57\u5217\u30ad\u30fc\u3092\u4fdd\u6301\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0\u307e\u3067\n$array1 = ['a' =&gt; 1, 'b' =&gt; 2];\n$array2 = ['c' =&gt; 3, 'd' =&gt; 4];\n$merged = ['z' =&gt; 26, ...$array1, ...$array2]; \/\/ OK\n\n\/\/ \u3057\u304b\u3057\u3001\u540c\u3058\u30ad\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u4e0a\u66f8\u304d\u3055\u308c\u305f\n$array3 = ['a' =&gt; 10, 'e' =&gt; 5];\n$merged = [...$array1, ...$array3]; \/\/ PHP 8.0: ['a' =&gt; 10, 'b' =&gt; 2, 'e' =&gt; 5]\n\n\/\/ PHP 8.1\u4ee5\u964d\u3082\u540c\u69d8\u306e\u52d5\u4f5c\u3067\u3059\u304c\u3001\u3088\u308a\u4e00\u8cab\u6027\u304c\u3042\u308a\u307e\u3059\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-95\">PHP 8.2\u306e\u914d\u5217\u95a2\u9023\u6a5f\u80fd<\/h4>\n\n\n\n<p>PHP 8.2\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u914d\u5217\u95a2\u9023\u306e\u6539\u5584\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-96\">1. DNF\u30bf\u30a4\u30d7\uff08Disjunctive Normal Form\uff09<\/h5>\n\n\n\n<p>\u914d\u5217\u8981\u7d20\u306e\u578b\u3092\u3088\u308a\u8a73\u7d30\u306b\u6307\u5b9a\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=\"\">\/\/ PHP 8.2\nclass UserRepository {\n    \/\/ (int|string)\u3068\u3044\u3046\u30e6\u30cb\u30aa\u30f3\u578b\u3092\u30ad\u30fc\u3068\u3057\u3066\u6301\u3064\u914d\u5217\n    public function findUsers(array $criteria): array {\n        return [];\n    }\n    \n    \/\/ PHP 8.2\u306e\u578b\u5ba3\u8a00\n    public function processTags(array $tags): (int|string)[] {\n        return array_map(\n            fn($tag) =&gt; is_numeric($tag) ? (int)$tag : (string)$tag,\n            $tags\n        );\n    }\n}\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-97\">2. \u8aad\u307f\u53d6\u308a\u5c02\u7528\u30af\u30e9\u30b9\u306e\u6539\u5584<\/h5>\n\n\n\n<p>PHP 8.2\u3067\u306f\u8aad\u307f\u53d6\u308a\u5c02\u7528\u30af\u30e9\u30b9\u304c\u5c0e\u5165\u3055\u308c\u3001\u914d\u5217\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u6271\u3044\u304c\u6539\u5584\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 8.2\nreadonly class Config {\n    \/\/ \u3059\u3079\u3066\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u81ea\u52d5\u7684\u306breadonly\u306b\u306a\u308b\n    public array $settings;\n    \n    public function __construct(array $settings) {\n        $this-&gt;settings = $settings;\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-98\">PHP 8.3\u306e\u914d\u5217\u95a2\u9023\u6a5f\u80fd<\/h4>\n\n\n\n<p>PHP 8.3\u3067\u3082\u914d\u5217\u64cd\u4f5c\u306b\u5f79\u7acb\u3064\u3044\u304f\u3064\u304b\u306e\u6a5f\u80fd\u304c\u5f37\u5316\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-99\">1. json_validate() \u95a2\u6570<\/h5>\n\n\n\n<p>JSON\u6587\u5b57\u5217\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u5c02\u7528\u95a2\u6570\u304c\u8ffd\u52a0\u3055\u308c\u3001API\u304b\u3089\u306eJSON\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u914d\u5217\u306b\u5909\u63db\u3059\u308b\u524d\u306e\u691c\u8a3c\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.3\n$json = '{\"name\": \"John\", \"age\": 30}';\n\n\/\/ \u4ee5\u524d\u306e\u65b9\u6cd5\uff08\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u304b\u3089null\u30c1\u30a7\u30c3\u30af\uff09\n$isValid = json_decode($json) !== null &amp;&amp; json_last_error() === JSON_ERROR_NONE;\n\n\/\/ PHP 8.3\n$isValid = json_validate($json);  \/\/ \u5358\u7d14\u306b true \u3092\u8fd4\u3059\n\n\/\/ \u7121\u52b9\u306aJSON\u306e\u4f8b\n$invalidJson = '{\"name\": \"John\", \"age\": }';\n$isValid = json_validate($invalidJson);  \/\/ false\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-100\">2. #[\\Override] \u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8<\/h5>\n\n\n\n<p>\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u969b\u306b\u660e\u793a\u7684\u306b\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u914d\u5217\u3092\u6271\u3046\u7d99\u627f\u30af\u30e9\u30b9\u3067\u306e\u8aa4\u308a\u3092\u6e1b\u3089\u305b\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=\"\">class BaseCollection {\n    protected array $items = [];\n    \n    public function filter(callable $callback): array {\n        return array_filter($this-&gt;items, $callback);\n    }\n}\n\nclass UserCollection extends BaseCollection {\n    #[\\Override]\n    public function filter(callable $callback): array {\n        \/\/ \u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n        $filtered = parent::filter($callback);\n        return array_values($filtered); \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u30ea\u30bb\u30c3\u30c8\n    }\n    \n    \/\/ \u3082\u3057\u8aa4\u3063\u3066\u30e1\u30bd\u30c3\u30c9\u540d\u3092filterItems\u306a\u3069\u306b\u5909\u66f4\u3059\u308b\u3068\u3001\n    \/\/ #[\\Override]\u306b\u3088\u308a\u6b21\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u304c\u767a\u751f\n    \/\/ Fatal error: UserCollection::filterItems() has #[\\Override] attribute, but no matching parent method exists\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-101\">\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u914d\u5217\u64cd\u4f5c\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u7c21\u6f54\u306a\u30b3\u30fc\u30c9\u4f8b<\/h3>\n\n\n\n<p>PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u95a2\u6570\uff08Arrow Functions\uff09\u306f\u3001PHP 8.x\u3067\u3055\u3089\u306b\u6d3b\u7528\u306e\u5834\u3092\u5e83\u3052\u3001\u914d\u5217\u64cd\u4f5c\u3092\u8457\u3057\u304f\u7c21\u6f54\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-102\">\u57fa\u672c\u7684\u306a\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u914d\u5217\u64cd\u4f5c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306e\u7121\u540d\u95a2\u6570\n$doubled = array_map(function($n) {\n    return $n * 2;\n}, [1, 2, 3]);\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\n$doubled = array_map(fn($n) =&gt; $n * 2, [1, 2, 3]);\n\n\/\/ \u89aa\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u4f7f\u7528\n$factor = 3;\n$multiplied = array_map(fn($n) =&gt; $n * $factor, [1, 2, 3]);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-103\">PHP 8.x\u3067\u306e\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0+ \u8907\u6570\u306e\u914d\u5217\u95a2\u6570\u3068\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u7530\u4e2d', 'age' =&gt; 25, 'active' =&gt; true],\n    ['id' =&gt; 2, 'name' =&gt; '\u4f50\u85e4', 'age' =&gt; 30, 'active' =&gt; false],\n    ['id' =&gt; 3, 'name' =&gt; '\u9234\u6728', 'age' =&gt; 28, 'active' =&gt; true]\n];\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u306e\u540d\u524d\u3092\u53d6\u5f97\u3057\u3001ID\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u3051\n$activeUserNames = array_column(\n    array_filter($users, fn($user) =&gt; $user['active']),\n    'name',\n    'id'\n);\n\/\/ \u7d50\u679c: [1 =&gt; '\u7530\u4e2d', 3 =&gt; '\u9234\u6728']\n\n\/\/ PHP 8.0+ match\u5f0f\u3068\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\n$ageGroups = array_map(\n    fn($user) =&gt; [\n        'id' =&gt; $user['id'],\n        'name' =&gt; $user['name'],\n        'age_group' =&gt; match(true) {\n            $user['age'] &lt; 20 =&gt; '10\u4ee3',\n            $user['age'] &lt; 30 =&gt; '20\u4ee3',\n            $user['age'] &lt; 40 =&gt; '30\u4ee3',\n            default =&gt; '40\u4ee3\u4ee5\u4e0a'\n        }\n    ],\n    $users\n);\n\n\/\/ PHP 8.1+ \u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u30a2\u30ed\u30fc\u95a2\u6570\n$sortedUsers = array_filter(\n    array: $users,\n    callback: fn($user) =&gt; $user['age'] &gt;= 25 &amp;&amp; $user['active'],\n    mode: ARRAY_FILTER_USE_BOTH\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-104\">\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5909\u63db\u306e\u7c21\u7565\u5316<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.x \u3067\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5909\u63db\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\n$products = [\n    ['id' =&gt; 101, 'name' =&gt; '\u30ce\u30fc\u30c8PC', 'price' =&gt; 80000, 'stock' =&gt; 5],\n    ['id' =&gt; 102, 'name' =&gt; '\u30bf\u30d6\u30ec\u30c3\u30c8', 'price' =&gt; 60000, 'stock' =&gt; 0],\n    ['id' =&gt; 103, 'name' =&gt; '\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3', 'price' =&gt; 50000, 'stock' =&gt; 12]\n];\n\n\/\/ \u5546\u54c1\u306e\u5728\u5eab\u72b6\u6cc1\u3068\u5024\u6bb5\u306b\u57fa\u3065\u3044\u3066\u8cfc\u5165\u53ef\u80fd\u304b\u3092\u5224\u5b9a\n$results = array_map(\n    fn($product) =&gt; [\n        'id' =&gt; $product['id'],\n        'name' =&gt; $product['name'],\n        'status' =&gt; match(true) {\n            $product['stock'] &lt;= 0 =&gt; '\u5728\u5eab\u5207\u308c',\n            $product['price'] &gt;= 70000 =&gt; '\u9ad8\u984d\u5546\u54c1',\n            $product['price'] &gt;= 50000 =&gt; '\u8cfc\u5165\u691c\u8a0e',\n            default =&gt; '\u8cfc\u5165\u53ef\u80fd'\n        },\n        'available' =&gt; $product['stock'] &gt; 0,\n        'price_with_tax' =&gt; (int)($product['price'] * 1.1)\n    ],\n    $products\n);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-105\">\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u914d\u5217\u51e6\u7406\u306e\u6700\u9069\u5316\u624b\u6cd5<\/h3>\n\n\n\n<p>PHP 8.x\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3068\u3001\u914d\u5217\u51e6\u7406\u3092\u3055\u3089\u306b\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5177\u4f53\u7684\u306a\u6700\u9069\u5316\u624b\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-106\">JIT\u30b3\u30f3\u30d1\u30a4\u30e9\u3092\u6d3b\u7528\u3057\u305f\u914d\u5217\u51e6\u7406\u306e\u9ad8\u901f\u5316<\/h4>\n\n\n\n<p>PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305fJIT\uff08Just-In-Time\uff09\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u7279\u306b\u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3055\u308c\u308b\u914d\u5217\u64cd\u4f5c\u3067\u5927\u304d\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u3092\u3082\u305f\u3089\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=\"\">\/\/ JIT\u30b3\u30f3\u30d1\u30a4\u30e9\u3092\u6709\u52b9\u306b\u3057\u305f\u8a2d\u5b9a\uff08php.ini\u307e\u305f\u306f\u30e9\u30f3\u30bf\u30a4\u30e0\u8a2d\u5b9a\uff09\n\/\/ opcache.jit=1255\n\/\/ opcache.jit_buffer_size=100M\n\n\/\/ \u5927\u898f\u6a21\u914d\u5217\u306e\u51e6\u7406\u4f8b\nfunction sumOfSquares(array $numbers): int {\n    $sum = 0;\n    foreach ($numbers as $number) {\n        $sum += $number * $number;\n    }\n    return $sum;\n}\n\n$largeArray = range(1, 1000000);\n$start = microtime(true);\n$result = sumOfSquares($largeArray);\n$end = microtime(true);\n\necho \"Time taken: \" . ($end - $start) . \" seconds\\n\";\n\/\/ PHP 7.4: \u7d040.12\u79d2\n\/\/ PHP 8.0+ (JIT\u6709\u52b9): \u7d040.03\u79d2\uff084\u500d\u306e\u9ad8\u901f\u5316\uff09\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-107\">\u30de\u30c3\u30c1\u5f0f\u306b\u3088\u308b\u914d\u5217\u51e6\u7406\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p><code>match<\/code>\u5f0f\u306f\u578b\u53b3\u683c\u306a\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u884c\u3044\u3001<code>switch<\/code>\u6587\u3088\u308a\u3082\u52b9\u7387\u7684\u3067\u3059\u3002\u914d\u5217\u51e6\u7406\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.x\u3067\u306e\u66f8\u304d\u65b9\uff08switch\u6587\uff09\nfunction categorizeProducts($products) {\n    $categories = [];\n    foreach ($products as $product) {\n        switch ($product['price']) {\n            case $product['price'] &lt; 1000:\n                $category = 'budget';\n                break;\n            case $product['price'] &lt; 5000:\n                $category = 'standard';\n                break;\n            default:\n                $category = 'premium';\n                break;\n        }\n        $categories[$product['id']] = $category;\n    }\n    return $categories;\n}\n\n\/\/ PHP 8.0+ \u3067\u306e\u6700\u9069\u5316\uff08match\u5f0f\uff09\nfunction categorizeProducts($products) {\n    return array_reduce(\n        $products,\n        fn($result, $product) =&gt; [\n            ...$result,\n            $product['id'] =&gt; match(true) {\n                $product['price'] &lt; 1000 =&gt; 'budget',\n                $product['price'] &lt; 5000 =&gt; 'standard',\n                default =&gt; 'premium'\n            }\n        ],\n        []\n    );\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-108\">\u540d\u524d\u4ed8\u304d\u5f15\u6570\u306b\u3088\u308b\u914d\u5217\u95a2\u6570\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/h4>\n\n\n\n<p>\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7279\u306b\u8907\u96d1\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6301\u3064\u914d\u5217\u95a2\u6570\u306e\u4f7f\u7528\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.x\n$result = array_merge(\n    $array1,\n    $array2,\n    [1, 2, 3]\n);\n\n\/\/ PHP 8.0+\uff08\u540d\u524d\u4ed8\u304d\u5f15\u6570\uff09\n\/\/ \u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u306a\u306e\u3067\u7701\u7565\u53ef\u80fd\u3067\u3059\u304c\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\n$result = array_merge(\n    array1: $array1,\n    array2: $array2,\n    array3: [1, 2, 3]\n);\n\n\/\/ usort\u3067\u3088\u308a\u660e\u78ba\u306b\nusort(\n    array: $products,\n    callback: fn($a, $b) =&gt; $b['sales'] &lt;=&gt; $a['sales']\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-109\">nullsafe\u6f14\u7b97\u5b50\u3068match\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5b89\u5168\u306a\u51e6\u7406\u306b\u306f\u3001nullsafe\u6f14\u7b97\u5b50\u3068match\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.x\nfunction getUserStatus($user) {\n    if (!isset($user['account']) || !isset($user['account']['status'])) {\n        return 'unknown';\n    }\n    \n    $status = $user['account']['status'];\n    \n    if ($status === 'active') {\n        return 'active';\n    } else if ($status === 'pending') {\n        return 'needs verification';\n    } else if ($status === 'suspended') {\n        return 'contact support';\n    } else {\n        return 'unknown';\n    }\n}\n\n\/\/ PHP 8.x\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5f62\u5f0f\u306b\u5909\u63db\u3057\u3066\u4f7f\u7528\uff09\nfunction getUserStatus($userData) {\n    $user = (object)$userData;\n    \n    return match($user?-&gt;account?-&gt;status) {\n        'active' =&gt; 'active',\n        'pending' =&gt; 'needs verification',\n        'suspended' =&gt; 'contact support',\n        default =&gt; 'unknown'\n    };\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-110\">PHP 8.1+\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306b\u3088\u308b\u914d\u5217\u5408\u6210\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>PHP 8.1\u3067\u306f\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306e\u6319\u52d5\u304c\u6539\u5584\u3055\u308c\u3001\u914d\u5217\u306e\u5408\u6210\u304c\u3088\u308a\u76f4\u611f\u7684\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 7.4\u3067\u306earray_merge()\u306e\u4f7f\u7528\n$defaults = ['mode' =&gt; 'dark', 'cache' =&gt; true, 'debug' =&gt; false];\n$userPrefs = ['mode' =&gt; 'light'];\n$config = array_merge($defaults, $userPrefs);\n\n\/\/ PHP 8.1+\u3067\u306e\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\n$config = [...$defaults, ...$userPrefs]; \/\/ \u660e\u78ba\u3067\u7c21\u6f54\n\n\/\/ \u8907\u6570\u914d\u5217\u306e\u5408\u6210\u3082\u7c21\u5358\n$moreSettings = ['notifications' =&gt; true];\n$finalConfig = [...$defaults, ...$userPrefs, ...$moreSettings];\n\n\/\/ \u7279\u5b9a\u306e\u30ad\u30fc\u3060\u3051\u4e0a\u66f8\u304d\n$finalConfig = [\n    ...$defaults,\n    'mode' =&gt; 'custom', \/\/ \u7279\u5b9a\u306e\u30ad\u30fc\u3060\u3051\u4e0a\u66f8\u304d\n    ...($userPrefs['cache'] ? [] : ['cache' =&gt; false]) \/\/ \u6761\u4ef6\u4ed8\u304d\u4e0a\u66f8\u304d\n];\n<\/pre>\n\n\n\n<p>PHP 8.x\u30b7\u30ea\u30fc\u30ba\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30c9\u306f\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u7a4d\u6975\u7684\u306b\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u30e2\u30c0\u30f3\u306aPHP\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u5b9f\u73fe\u3057\u3001\u3088\u308a\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-111\">PHP\u914d\u5217\u6d3b\u7528\u306e\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001PHP\u914d\u5217\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u914d\u5217\u306fPHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u5fc3\u7684\u306a\u8981\u7d20\u3067\u3042\u308a\u3001\u305d\u306e\u6d3b\u7528\u65b9\u6cd5\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5b66\u3093\u3060\u3053\u3068\u3092\u632f\u308a\u8fd4\u308a\u3001\u3055\u3089\u306a\u308b\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306e\u9053\u7b4b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-112\">\u914d\u5217\u64cd\u4f5c\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h3>\n\n\n\n<p>PHP\u914d\u5217\u306e\u77e5\u8b58\u3092\u3055\u3089\u306b\u6df1\u3081\u308b\u305f\u3081\u306e\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-113\">\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.php.net\/manual\/ja\/ref.array.php\">PHP\u516c\u5f0f\u30de\u30cb\u30e5\u30a2\u30eb \u2013 \u914d\u5217\u95a2\u6570<\/a><\/strong><br>PHP\u914d\u5217\u95a2\u6570\u306e\u5b8c\u5168\u306a\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3002\u5404\u95a2\u6570\u306e\u8a73\u7d30\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u4f8b\u304c\u63b2\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/phptherightway.com\/\">PHP: The Right Way<\/a><\/strong><br>PHP\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u305f\u30ea\u30bd\u30fc\u30b9\u3002\u914d\u5217\u64cd\u4f5c\u3092\u542b\u3080\u73fe\u4ee3\u7684\u306aPHP\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u306b\u3064\u3044\u3066\u5b66\u3079\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-114\">\u66f8\u7c4d\u3068\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u300eModern PHP\u300f\uff08Josh Lockhart\u8457\uff09<\/strong><br>\u73fe\u4ee3\u7684\u306aPHP\u958b\u767a\u306e\u5b9f\u8df5\u7684\u30ac\u30a4\u30c9\u3002\u914d\u5217\u64cd\u4f5c\u3001\u540d\u524d\u7a7a\u9593\u3001Composer\u306a\u3069\u3001PHP\u306e\u91cd\u8981\u306a\u5074\u9762\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u300ePHP 8 Programming Tips, Tricks and Best Practices\u300f\uff08Alexandre Daubois\u8457\uff09<\/strong><br>PHP 8\u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u624b\u6cd5\u3092\u89e3\u8aac\u3002\u914d\u5217\u64cd\u4f5c\u306e\u6700\u65b0\u30c6\u30af\u30cb\u30c3\u30af\u3082\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Laracasts (<a href=\"https:\/\/laracasts.com\/\">https:\/\/laracasts.com\/<\/a>)<\/strong><br>PHP\u5168\u822c\u304b\u3089Laravel\u307e\u3067\u3001\u9ad8\u54c1\u8cea\u306a\u52d5\u753b\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u63d0\u4f9b\u3059\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3002\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30b9\u3082\u5145\u5b9f\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-115\">\u5b9f\u8df5\u7684\u306a\u30ea\u30bd\u30fc\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>GitHub \u2013 PHP Collection Packages<\/strong><br>\u914d\u5217\u64cd\u4f5c\u3092\u62e1\u5f35\u3059\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\uff08\u4f8b\uff1a<a href=\"https:\/\/github.com\/illuminate\/collections\">Laravel Collections<\/a>\uff09\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u3053\u3068\u3067\u3001\u9ad8\u5ea6\u306a\u914d\u5217\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b66\u3079\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>PHP Internals Book (<a href=\"https:\/\/www.phpinternalsbook.com\/\">https:\/\/www.phpinternalsbook.com\/<\/a>)<\/strong><br>PHP\u306e\u5185\u90e8\u5b9f\u88c5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u914d\u5217\u306e\u5185\u90e8\u69cb\u9020\u3084\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u306e\u7406\u89e3\u304c\u6df1\u307e\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>RFCs \u2013 PHP 8.x\u65b0\u6a5f\u80fd<\/strong><br><a href=\"https:\/\/wiki.php.net\/rfc\">PHP RFC\u30da\u30fc\u30b8<\/a>\u3067\u3001\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u914d\u5217\u95a2\u9023\u6a5f\u80fd\u63d0\u6848\u3068\u8b70\u8ad6\u306e\u80cc\u666f\u3092\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-116\">\u5b9f\u52d9\u3067\u5373\u5f79\u7acb\u3064PHP\u914d\u5217\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/h3>\n\n\n\n<p>\u65e5\u5e38\u7684\u306aPHP\u958b\u767a\u3067\u3088\u304f\u4f7f\u3046\u914d\u5217\u64cd\u4f5c\u306e\u30af\u30a4\u30c3\u30af\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3067\u3059\u3002\u3053\u306e\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8\u3092\u624b\u5143\u306b\u7f6e\u3044\u3066\u304a\u304f\u3068\u3001\u52b9\u7387\u7684\u306b\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-117\">\u57fa\u672c\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=\"\">\/\/ \u914d\u5217\u306e\u4f5c\u6210\n$array = [1, 2, 3];                 \/\/ \u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u914d\u5217\n$assoc = ['name' =&gt; 'John', 'age' =&gt; 30]; \/\/ \u9023\u60f3\u914d\u5217\n\n\/\/ \u8981\u7d20\u306e\u8ffd\u52a0\n$array[] = 4;                       \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0\n$assoc['email'] = 'john@example.com'; \/\/ \u30ad\u30fc\u3092\u6307\u5b9a\u3057\u3066\u8ffd\u52a0\n\n\/\/ \u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $array[0];                     \/\/ 1\necho $assoc['name'];                \/\/ John\n\n\/\/ \u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\n$value = $array[5] ?? 'default';    \/\/ \u5b58\u5728\u3057\u306a\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5834\u5408\u306fdefault\n$email = $assoc['email'] ?? '';     \/\/ \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306e\u5834\u5408\u306f\u7a7a\u6587\u5b57\n\n\/\/ \u8981\u7d20\u306e\u524a\u9664\nunset($array[1]);                   \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u306e\u8981\u7d20\u3092\u524a\u9664\nunset($assoc['age']);               \/\/ \u30ad\u30fc'age'\u306e\u8981\u7d20\u3092\u524a\u9664\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-118\">\u3088\u304f\u4f7f\u3046\u914d\u5217\u95a2\u6570<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u7d71\u8a08\u30fb\u96c6\u8a08\n$sum = array_sum($array);           \/\/ \u5408\u8a08\n$count = count($array);             \/\/ \u8981\u7d20\u6570\n$max = max($array);                 \/\/ \u6700\u5927\u5024\n$min = min($array);                 \/\/ \u6700\u5c0f\u5024\n\n\/\/ \u30ad\u30fc\u3068\u5024\u306e\u64cd\u4f5c\n$keys = array_keys($assoc);         \/\/ \u3059\u3079\u3066\u306e\u30ad\u30fc\u3092\u53d6\u5f97\n$values = array_values($assoc);     \/\/ \u3059\u3079\u3066\u306e\u5024\u3092\u53d6\u5f97\n$flipped = array_flip($assoc);      \/\/ \u30ad\u30fc\u3068\u5024\u3092\u5165\u308c\u66ff\u3048\n\n\/\/ \u914d\u5217\u306e\u691c\u7d22\n$key = array_search('John', $assoc); \/\/ \u5024'John'\u3092\u6301\u3064\u30ad\u30fc\u3092\u691c\u7d22\n$exists = in_array('John', $assoc);  \/\/ \u5024'John'\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n$hasKey = array_key_exists('name', $assoc); \/\/ \u30ad\u30fc'name'\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n\n\/\/ \u914d\u5217\u306e\u7d50\u5408\n$merged = array_merge($array1, $array2); \/\/ \u914d\u5217\u3092\u7d50\u5408\n$combined = array_combine($keys, $values); \/\/ \u30ad\u30fc\u914d\u5217\u3068\u5024\u914d\u5217\u304b\u3089\u9023\u60f3\u914d\u5217\u3092\u4f5c\u6210\n\n\/\/ \u914d\u5217\u306e\u5909\u63db\n$mapped = array_map(fn($x) =&gt; $x * 2, $array); \/\/ \u5404\u8981\u7d20\u306b\u95a2\u6570\u3092\u9069\u7528\n$filtered = array_filter($array, fn($x) =&gt; $x &gt; 2); \/\/ \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u306e\u307f\u62bd\u51fa\n$reduced = array_reduce($array, fn($carry, $item) =&gt; $carry + $item, 0); \/\/ \u914d\u5217\u3092\u5358\u4e00\u306e\u5024\u306b\u96c6\u7d04\n\n\/\/ \u914d\u5217\u306e\u30bd\u30fc\u30c8\nsort($array);                       \/\/ \u5024\u3067\u6607\u9806\u30bd\u30fc\u30c8\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u30ea\u30bb\u30c3\u30c8\uff09\nasort($assoc);                      \/\/ \u5024\u3067\u6607\u9806\u30bd\u30fc\u30c8\uff08\u30ad\u30fc\u306f\u4fdd\u6301\uff09\nksort($assoc);                      \/\/ \u30ad\u30fc\u3067\u6607\u9806\u30bd\u30fc\u30c8\nusort($array, fn($a, $b) =&gt; $b &lt;=&gt; $a); \/\/ \u30ab\u30b9\u30bf\u30e0\u6bd4\u8f03\u95a2\u6570\u3067\u964d\u9806\u30bd\u30fc\u30c8\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-119\">\u30c7\u30fc\u30bf\u69cb\u9020\u64cd\u4f5c<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u591a\u6b21\u5143\u914d\u5217\n$nested = [\n    'user' =&gt; ['name' =&gt; 'John', 'scores' =&gt; [95, 80, 91]],\n    'admin' =&gt; ['name' =&gt; 'Jane', 'scores' =&gt; [99, 95, 98]]\n];\n\n\/\/ \u7279\u5b9a\u306e\u5217\u3092\u62bd\u51fa\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; 'John'],\n    ['id' =&gt; 2, 'name' =&gt; 'Jane']\n];\n$names = array_column($users, 'name');        \/\/ ['John', 'Jane']\n$indexed = array_column($users, 'name', 'id'); \/\/ [1 =&gt; 'John', 2 =&gt; 'Jane']\n\n\/\/ \u914d\u5217\u306e\u5206\u5272\u3068\u7d50\u5408\n[$first, $second, $rest] = $array;            \/\/ \u5206\u5272\u4ee3\u5165\n$chunks = array_chunk($array, 2);             \/\/ 2\u8981\u7d20\u305a\u3064\u306e\u914d\u5217\u306b\u5206\u5272\n$sliced = array_slice($array, 1, 2);          \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u304b\u30892\u500b\u306e\u8981\u7d20\u3092\u53d6\u5f97\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-120\">PHP 8.x\u5411\u3051\u30c6\u30af\u30cb\u30c3\u30af<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0+\n$result = match($status) {\n    200, 201 =&gt; 'Success',\n    404 =&gt; 'Not Found',\n    default =&gt; 'Unknown'\n};\n\n\/\/ PHP 8.1+ \u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08\u30ad\u30fc\u4fdd\u6301\uff09\n$config = [...$defaults, ...$overrides];\n\n\/\/ PHP 8.0+ \u540d\u524d\u4ed8\u304d\u5f15\u6570\n$filtered = array_filter(\n    array: $users,\n    callback: fn($user) =&gt; $user['active'],\n    mode: ARRAY_FILTER_USE_BOTH\n);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-121\">\u3088\u308a\u9ad8\u5ea6\u306a\u914d\u5217\u51e6\u7406\u3078\u306e\u30b9\u30c6\u30c3\u30d7\u30a2\u30c3\u30d7\u30ac\u30a4\u30c9<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306e\u57fa\u672c\u3092\u30de\u30b9\u30bf\u30fc\u3057\u305f\u3089\u3001\u6b21\u306e\u30ec\u30d9\u30eb\u306b\u9032\u3080\u305f\u3081\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-122\">1. \u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u7fd2\u5f97<\/h4>\n\n\n\n<p>PHP\u306e\u914d\u5217\u95a2\u6570\u306f\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u8003\u3048\u65b9\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5ba3\u8a00\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u547d\u4ee4\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\n$result = [];\nforeach ($users as $user) {\n    if ($user['active']) {\n        $name = $user['first_name'] . ' ' . $user['last_name'];\n        $result[$user['id']] = $name;\n    }\n}\n\n\/\/ \u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\n$result = array_column(\n    array_filter($users, fn($user) =&gt; $user['active']),\n    null,\n    'id'\n);\n$result = array_map(\n    fn($user) =&gt; $user['first_name'] . ' ' . $user['last_name'],\n    $result\n);\n<\/pre>\n\n\n\n<p>\u3088\u308a\u9ad8\u5ea6\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3068\u3057\u3066\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u51e6\u7406\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u3092\u4f5c\u6210\nfunction pipe($value, ...$functions) {\n    return array_reduce(\n        $functions,\n        fn($carry, $function) =&gt; $function($carry),\n        $value\n    );\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$result = pipe(\n    $users,\n    fn($users) =&gt; array_filter($users, fn($user) =&gt; $user['active']),\n    fn($users) =&gt; array_map(fn($user) =&gt; [\n        'id' =&gt; $user['id'],\n        'full_name' =&gt; $user['first_name'] . ' ' . $user['last_name']\n    ], $users),\n    fn($users) =&gt; array_column($users, null, 'id')\n);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-123\">2. \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u3088\u308a\u6d17\u7df4\u3055\u308c\u305f\u914d\u5217\u64cd\u4f5c\u306e\u305f\u3081\u306b\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>Laravel Collections<\/strong><\/p>\n\n\n\n<p>Laravel\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306f\u3001\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u304b\u3089\u72ec\u7acb\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">use Illuminate\\Support\\Collection;\n\n$collection = collect([1, 2, 3, 4, 5]);\n\n$result = $collection\n    -&gt;filter(fn($value) =&gt; $value &gt; 2)\n    -&gt;map(fn($value) =&gt; $value * 2)\n    -&gt;values();\n\n\/\/ \u7d50\u679c: [6, 8, 10]\n<\/pre>\n\n\n\n<p><strong>\u81ea\u4f5c\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9<\/strong><\/p>\n\n\n\n<p>\u81ea\u5206\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u7528\u306b\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3082\u826f\u3044\u7df4\u7fd2\u306b\u306a\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=\"\">class Collection {\n    private array $items;\n    \n    public function __construct(array $items = []) {\n        $this-&gt;items = $items;\n    }\n    \n    public function map(callable $callback): self {\n        return new self(array_map($callback, $this-&gt;items));\n    }\n    \n    public function filter(callable $callback): self {\n        return new self(array_filter($this-&gt;items, $callback));\n    }\n    \n    \/\/ \u305d\u306e\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9...\n    \n    public function toArray(): array {\n        return $this-&gt;items;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$result = (new Collection([1, 2, 3, 4, 5]))\n    -&gt;filter(fn($x) =&gt; $x % 2 == 0)\n    -&gt;map(fn($x) =&gt; $x * 3)\n    -&gt;toArray();\n\/\/ \u7d50\u679c: [6, 12]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-124\">3. \u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u914d\u5217\u306e\u4ee3\u308f\u308a\u306b\u30a4\u30c6\u30ec\u30fc\u30bf\u3084\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3046\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u4f8b\nfunction readCsv($filename) {\n    $handle = fopen($filename, 'r');\n    \n    while (($line = fgetcsv($handle)) !== false) {\n        yield $line;\n    }\n    \n    fclose($handle);\n}\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u826f\u304f\u51e6\u7406\n$totalSales = 0;\nforeach (readCsv('sales.csv') as $line) {\n    if ($line[0] === 'completed') {\n        $totalSales += (float)$line[3];\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-125\">4. SPL\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u63a2\u6c42<\/h4>\n\n\n\n<p>PHP\u306eSPL\uff08Standard PHP Library\uff09\u306b\u306f\u3001\u7570\u306a\u308b\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u304c\u7528\u610f\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=\"\">\/\/ SplFixedArray - \u56fa\u5b9a\u30b5\u30a4\u30ba\u3067\u52b9\u7387\u7684\n$fixedArray = new SplFixedArray(5);\nfor ($i = 0; $i &lt; 5; $i++) {\n    $fixedArray[$i] = $i * 2;\n}\n\n\/\/ SplDoublyLinkedList - \u4e21\u65b9\u5411\u30ea\u30b9\u30c8\n$list = new SplDoublyLinkedList();\n$list-&gt;push('a');\n$list-&gt;push('b');\n$list-&gt;unshift('z'); \/\/ \u5148\u982d\u306b\u8ffd\u52a0\n\n\/\/ SplHeap - \u30d2\u30fc\u30d7\u69cb\u9020\nclass MinHeap extends SplMinHeap {\n    public function compare($a, $b) {\n        return parent::compare($a['priority'], $b['priority']);\n    }\n}\n\n$heap = new MinHeap();\n$heap-&gt;insert(['task' =&gt; 'Send email', 'priority' =&gt; 3]);\n$heap-&gt;insert(['task' =&gt; 'Fix bug', 'priority' =&gt; 1]);\n\/\/ \u512a\u5148\u5ea6\u9806\u306b\u53d6\u308a\u51fa\u3055\u308c\u308b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-126\">5. \u914d\u5217\u64cd\u4f5c\u3068\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3<\/h4>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u3068\u69d8\u3005\u306a\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3<\/strong>: \u8907\u96d1\u306a\u914d\u5217\u69cb\u9020\u306e\u69cb\u7bc9\u3092\u6bb5\u968e\u7684\u306b\u884c\u3046<\/li>\n\n\n\n<li><strong>\u30b9\u30c8\u30e9\u30c6\u30b8\u30fc\u30d1\u30bf\u30fc\u30f3<\/strong>: \u7570\u306a\u308b\u914d\u5217\u51e6\u7406\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5207\u308a\u66ff\u3048\u308b<\/li>\n\n\n\n<li><strong>\u30d3\u30b8\u30bf\u30fc\u30d1\u30bf\u30fc\u30f3<\/strong>: \u8907\u96d1\u306a\u30cd\u30b9\u30c8\u69cb\u9020\u3092\u518d\u5e30\u7684\u306b\u51e6\u7406\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30b3\u30f3\u30dd\u30b8\u30c3\u30c8\u30d1\u30bf\u30fc\u30f3<\/strong>: \u30c4\u30ea\u30fc\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u8868\u73fe\u3057\u3066\u64cd\u4f5c\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u914d\u5217\u64cd\u4f5c\u306e\u30b9\u30c8\u30e9\u30c6\u30b8\u30fc\u30d1\u30bf\u30fc\u30f3\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=\"\">interface SortStrategy {\n    public function sort(array $data): array;\n}\n\nclass AlphabeticalSort implements SortStrategy {\n    public function sort(array $data): array {\n        asort($data);\n        return $data;\n    }\n}\n\nclass NumericalSort implements SortStrategy {\n    public function sort(array $data): array {\n        asort($data, SORT_NUMERIC);\n        return $data;\n    }\n}\n\nclass DataSorter {\n    private SortStrategy $strategy;\n    \n    public function setStrategy(SortStrategy $strategy): void {\n        $this-&gt;strategy = $strategy;\n    }\n    \n    public function sortData(array $data): array {\n        return $this-&gt;strategy-&gt;sort($data);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$sorter = new DataSorter();\n$data = ['b' =&gt; 10, 'a' =&gt; 5, 'c' =&gt; 15];\n\n$sorter-&gt;setStrategy(new AlphabeticalSort());\n$alphabetical = $sorter-&gt;sortData($data); \/\/ \u30ad\u30fc\u3067\u30bd\u30fc\u30c8\n\n$sorter-&gt;setStrategy(new NumericalSort());\n$numerical = $sorter-&gt;sortData($data); \/\/ \u5024\u3067\u30bd\u30fc\u30c8\n<\/pre>\n\n\n\n<p>PHP\u914d\u5217\u306f\u5358\u7d14\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306b\u898b\u3048\u3066\u3001\u305d\u306e\u53ef\u80fd\u6027\u306f\u975e\u5e38\u306b\u5e83\u5927\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u57fa\u672c\u3068\u5fdc\u7528\u3092\u6d3b\u304b\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u914d\u5217\u64cd\u4f5c\u306e\u30b9\u30ad\u30eb\u3092\u78e8\u304f\u3053\u3068\u306f\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30de\u3068\u3057\u3066\u306e\u6210\u9577\u306b\u5927\u304d\u304f\u8ca2\u732e\u3059\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u65b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3084PHP\u8a00\u8a9e\u306e\u9032\u5316\u306b\u5408\u308f\u305b\u3066\u3001\u5e38\u306b\u5b66\u3073\u7d9a\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002PHP\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306e\u30c7\u30a3\u30b9\u30ab\u30c3\u30b7\u30e7\u30f3\u3084RFC\uff08\u8a00\u8a9e\u4ed5\u69d8\u63d0\u6848\uff09\u306b\u3082\u76ee\u3092\u901a\u3057\u3001\u6700\u65b0\u306e\u30c8\u30ec\u30f3\u30c9\u3092\u30ad\u30e3\u30c3\u30c1\u30a2\u30c3\u30d7\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002PHP\u914d\u5217\u306e\u53ef\u80fd\u6027\u3092\u6700\u5927\u9650\u306b\u6d3b\u304b\u3057\u3066\u3001\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u5b9f\u73fe\u3057\u3066\u304f\u3060\u3055\u3044\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-3438","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\/3438","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=3438"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3438\/revisions"}],"predecessor-version":[{"id":3439,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3438\/revisions\/3439"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}