{"id":3655,"date":"2025-04-07T15:59:38","date_gmt":"2025-04-07T06:59:38","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3655"},"modified":"2025-04-07T15:59:53","modified_gmt":"2025-04-07T06:59:53","slug":"php-functions%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc-%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be%e3%81%a715%e3%81%ae%e3%82%b5%e3%83%b3%e3%83%97%e3%83%ab%e3%82%b3","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3655","title":{"rendered":"PHP Functions\u5b8c\u5168\u30de\u30b9\u30bf\u30fc: \u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u306715\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u5b66\u3076\u5b9f\u8df5\u30ac\u30a4\u30c9 [2025\u5e74\u7248]"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\u306f\u3058\u3081\u306b: PHP\u95a2\u6570\u306e\u91cd\u8981\u6027\u3068\u57fa\u672c\u6982\u5ff5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u306a\u305cPHP\u95a2\u6570\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/a>      <\/li>      <li>        <a href=\"#i-2\">PHP\u95a2\u6570\u306e\u7a2e\u985e<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">PHP\u95a2\u6570\u306e\u57fa\u672c: \u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">PHP\u95a2\u6570\u306e\u57fa\u672c\u69cb\u9020<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u95a2\u6570\u5b9a\u7fa9\u306e\u4f4d\u7f6e\u3068\u547c\u3073\u51fa\u3057\u306e\u30bf\u30a4\u30df\u30f3\u30b0<\/a>      <\/li>      <li>        <a href=\"#i-8\">\u623b\u308a\u5024\u306e\u306a\u3044\u95a2\u6570<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\uff08Early Return\uff09\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-10\">void\u578b\u306e\u623b\u308a\u5024\uff08PHP 7.1\u4ee5\u964d\uff09<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u547d\u540d\u898f\u5247<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9\u3068\u30b9\u30b3\u30fc\u30d7\u306e\u7406\u89e3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-31\">PHP\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-32\">\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u3068\u578b\u5ba3\u8a00<\/a>      <\/li>      <li>        <a href=\"#i-39\">\u53ef\u5909\u9577\u5f15\u6570\u30ea\u30b9\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-43\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u3068\u8907\u6570\u306e\u623b\u308a\u5024\u306e\u6271\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-48\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u5546\u54c1\u691c\u7d22\u30d5\u30a3\u30eb\u30bf\u95a2\u6570<\/a>      <\/li>      <li>        <a href=\"#i-49\">\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u3068\u578b\u5ba3\u8a00<\/a>      <\/li>      <li>        <a href=\"#i-63\">\u53ef\u5909\u9577\u5f15\u6570\u30ea\u30b9\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-81\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u3068\u8907\u6570\u306e\u623b\u308a\u5024\u306e\u6271\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-97\">PHP\u306e\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-98\">\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3068\u305d\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-104\">\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3088\u308b\u30b3\u30fc\u30c9\u306e\u7c21\u7565\u5316<\/a>      <\/li>      <li>        <a href=\"#i-110\">\u518d\u5e30\u95a2\u6570\u306e\u7406\u89e3\u3068\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-116\">\u307e\u3068\u3081\uff1a\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-117\">\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3068\u305d\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-130\">\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3088\u308b\u30b3\u30fc\u30c9\u306e\u7c21\u7565\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-146\">\u518d\u5e30\u95a2\u6570\u306e\u7406\u89e3\u3068\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-158\">PHP\u95a2\u6570\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-159\">\u95a2\u6570\u8a2d\u8a08\u306e\u539f\u5247: \u5358\u4e00\u8cac\u4efb\u306e\u6cd5\u5247<\/a>      <\/li>      <li>        <a href=\"#i-163\">\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-167\">\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-170\">\u95a2\u6570\u8a2d\u8a08\u306e\u539f\u5247: \u5358\u4e00\u8cac\u4efb\u306e\u6cd5\u5247<\/a>      <\/li>      <li>        <a href=\"#i-175\">\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-179\">\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-183\">\u5b9f\u8df5\u7684\u306aPHP\u95a2\u6570\u306e\u4f7f\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-184\">\u30c7\u30fc\u30bf\u51e6\u7406\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-186\">\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306e\u305f\u3081\u306e\u95a2\u6570\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-190\">\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u306e\u305f\u3081\u306e\u95a2\u6570\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-194\">\u307e\u3068\u3081<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-195\">\u30c7\u30fc\u30bf\u51e6\u7406\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-197\">\u307e\u3068\u3081: PHP\u95a2\u6570\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-198\">\u8a18\u4e8b\u306e\u4e3b\u8981\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-199\">\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306e\u95a2\u6570\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-200\">PHP\u95a2\u6570\u30de\u30b9\u30bf\u30fc\u3078\u306e\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>      <\/li>      <li>        <a href=\"#i-201\">\u7d99\u7d9a\u7684\u306a\u5b66\u7fd2\u306e\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-202\">PHP\u95a2\u6570\u306e\u672a\u6765<\/a>      <\/li>      <li>        <a href=\"#i-203\">\u5b9f\u8df5\u306b\u5411\u3051\u3066\u306e\u52b1\u307e\u3057<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-204\">\u7d50\u3073\u306e\u8a00\u8449<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\u306f\u3058\u3081\u306b: PHP\u95a2\u6570\u306e\u91cd\u8981\u6027\u3068\u57fa\u672c\u6982\u5ff5<\/h2>\n\n\n\n<p>PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u3001**\u95a2\u6570\uff08function\uff09**\u306f\u3082\u3063\u3068\u3082\u91cd\u8981\u306a\u69cb\u6210\u8981\u7d20\u306e\u4e00\u3064\u3067\u3059\u3002\u95a2\u6570\u3068\u306f\u3001\u7279\u5b9a\u306e\u30bf\u30b9\u30af\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u307e\u3068\u3081\u3089\u308c\u305f\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u3067\u3042\u308a\u3001\u540d\u524d\u3092\u4ed8\u3051\u3066\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30a6\u30a7\u30d6\u958b\u767a\u306e\u73fe\u5834\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u306f\u3001PHP\u95a2\u6570\u306e\u7406\u89e3\u3068\u6d3b\u7528\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u306a\u305cPHP\u95a2\u6570\u304c\u91cd\u8981\u306a\u306e\u304b\uff1f<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027<\/strong>: \u4e00\u5ea6\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308c\u3070\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u306e\u8907\u6570\u306e\u5834\u6240\u304b\u3089\u4f55\u5ea6\u3067\u3082\u547c\u3073\u51fa\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/strong>: \u9069\u5207\u306b\u547d\u540d\u3055\u308c\u305f\u95a2\u6570\u306f\u3001\u30b3\u30fc\u30c9\u306e\u76ee\u7684\u3092\u660e\u78ba\u306b\u3057\u3001\u4ed6\u306e\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong>: \u30d0\u30b0\u306e\u4fee\u6b63\u3084\u6a5f\u80fd\u306e\u8ffd\u52a0\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u95a2\u6570\u5185\u306e\u4e00\u7b87\u6240\u3092\u4fee\u6b63\u3059\u308b\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u306e\u5bb9\u6613\u3055<\/strong>: \u500b\u3005\u306e\u95a2\u6570\u3092\u72ec\u7acb\u3057\u3066\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3092\u78ba\u4fdd\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u5206\u5272\u3068\u7d71\u6cbb<\/strong>: \u8907\u96d1\u306a\u554f\u984c\u3092\u5c0f\u3055\u306a\u95a2\u6570\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u3055\u3092\u7ba1\u7406\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u8003\u3048\u3066\u307f\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=\"\">\/\/ \u95a2\u6570\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408\n$username = $_POST['username'];\n$email = $_POST['email'];\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u540d\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\nif (empty($username)) {\n    $errors[] = '\u30e6\u30fc\u30b6\u30fc\u540d\u306f\u5fc5\u9808\u3067\u3059';\n} elseif (strlen($username) &lt; 3) {\n    $errors[] = '\u30e6\u30fc\u30b6\u30fc\u540d\u306f3\u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n}\n\n\/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\nif (empty($email)) {\n    $errors[] = '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059';\n} elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {\n    $errors[] = '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n}\n\n\/\/ \u5225\u306e\u30da\u30fc\u30b8\u3067\u3082\u540c\u3058\u30b3\u30fc\u30c9\u3092\u7e70\u308a\u8fd4\u3057\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308b...\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3092\u95a2\u6570\u5316\u3059\u308b\u3068\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u95a2\u6570\u3092\u4f7f\u3063\u305f\u5834\u5408\nfunction validateUsername($username) {\n    if (empty($username)) {\n        return '\u30e6\u30fc\u30b6\u30fc\u540d\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (strlen($username) &lt; 3) {\n        return '\u30e6\u30fc\u30b6\u30fc\u540d\u306f3\u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    }\n    return true;\n}\n\nfunction validateEmail($email) {\n    if (empty($email)) {\n        return '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {\n        return '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n    }\n    return true;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$username = $_POST['username'];\n$email = $_POST['email'];\n\n$usernameValidation = validateUsername($username);\n$emailValidation = validateEmail($email);\n\nif ($usernameValidation !== true) {\n    $errors[] = $usernameValidation;\n}\n\nif ($emailValidation !== true) {\n    $errors[] = $emailValidation;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">PHP\u95a2\u6570\u306e\u7a2e\u985e<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u3001\u69d8\u3005\u306a\u7a2e\u985e\u306e\u95a2\u6570\u304c\u5229\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7d44\u307f\u8fbc\u307f\u95a2\u6570<\/strong>: PHP\u306b\u6700\u521d\u304b\u3089\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u95a2\u6570\uff08\u4f8b\uff1a<code>strlen()<\/code>, <code>array_merge()<\/code>, <code>json_encode()<\/code>\uff09<\/li>\n\n\n\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u95a2\u6570<\/strong>: \u958b\u767a\u8005\u304c\u81ea\u5206\u3067\u5b9a\u7fa9\u3059\u308b\u95a2\u6570<\/li>\n\n\n\n<li><strong>\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09<\/strong>: \u540d\u524d\u306e\u306a\u3044\u95a2\u6570\u3067\u3001\u5909\u6570\u306b\u683c\u7d0d\u3057\u3066\u5229\u7528\u3067\u304d\u308b<\/li>\n\n\n\n<li><strong>\u30a2\u30ed\u30fc\u95a2\u6570<\/strong>: PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u7c21\u6f54\u306a\u69cb\u6587\u306e\u7121\u540d\u95a2\u6570<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/h3>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001PHP\u95a2\u6570\u306b\u3064\u3044\u3066\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u4f53\u7cfb\u7684\u306b\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u65b9\u6cd5\u3068\u547c\u3073\u51fa\u3057\u65b9<\/li>\n\n\n\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u306e\u9069\u5207\u306a\u6271\u3044\u65b9<\/li>\n\n\n\n<li>\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\uff08\u7121\u540d\u95a2\u6570\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u3001\u518d\u5e30\u95a2\u6570\uff09\u306e\u6d3b\u7528\u6cd5<\/li>\n\n\n\n<li>\u95a2\u6570\u8a2d\u8a08\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u95a2\u6570\u4f8b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u309215\u306e\u5b9f\u7528\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002PHP\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u521d\u5fc3\u8005\u306e\u65b9\u306b\u3082\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u95a2\u6570\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u3053\u3068\u306f\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002\u305d\u308c\u3067\u306f\u3001\u307e\u305a\u306f\u57fa\u672c\u7684\u306a\u95a2\u6570\u306e\u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u65b9\u304b\u3089\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">PHP\u95a2\u6570\u306e\u57fa\u672c: \u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u65b9<\/h2>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u305f\u3081\u306e\u7b2c\u4e00\u6b69\u306f\u3001\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u65b9\u6cd5\u3068\u547c\u3073\u51fa\u3057\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587\u304b\u3089\u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\u307e\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">PHP\u95a2\u6570\u306e\u57fa\u672c\u69cb\u9020<\/h3>\n\n\n\n<p>PHP\u3067\u306e\u95a2\u6570\u5b9a\u7fa9\u306f\u3001\u4ee5\u4e0b\u306e\u57fa\u672c\u69cb\u9020\u306b\u5f93\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=\"\">function \u95a2\u6570\u540d(\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8) {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\u5185\u5bb9\n    return \u623b\u308a\u5024; \/\/ \u30aa\u30d7\u30b7\u30e7\u30f3\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u69cb\u9020\u3092\u5206\u89e3\u3059\u308b\u3068\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>function<\/code> \u30ad\u30fc\u30ef\u30fc\u30c9\uff1a\u95a2\u6570\u5b9a\u7fa9\u306e\u958b\u59cb\u3092\u793a\u3057\u307e\u3059<\/li>\n\n\n\n<li><code>\u95a2\u6570\u540d<\/code>\uff1a\u95a2\u6570\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u540d\u524d<\/li>\n\n\n\n<li><code>\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8<\/code>\uff1a\u95a2\u6570\u304c\u53d7\u3051\u53d6\u308b\u30c7\u30fc\u30bf\u3092\u6307\u5b9a\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09<\/li>\n\n\n\n<li>\u4e2d\u62ec\u5f27 <code>{ }<\/code> \uff1a\u95a2\u6570\u306e\u51e6\u7406\u5185\u5bb9\u3092\u56f2\u307f\u307e\u3059<\/li>\n\n\n\n<li><code>return<\/code> \u6587\uff1a\u95a2\u6570\u306e\u5b9f\u884c\u7d50\u679c\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3057\u307e\u3059\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u30012\u3064\u306e\u6570\u5024\u3092\u8db3\u3057\u5408\u308f\u305b\u308b\u5358\u7d14\u306a\u95a2\u6570\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\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=\"\">function addNumbers($a, $b) {\n    $sum = $a + $b;\n    return $sum;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9<\/h3>\n\n\n\n<p>\u5b9a\u7fa9\u3057\u305f\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u95a2\u6570\u540d\u306b\u7d9a\u3051\u3066\u62ec\u5f27\u3092\u4ed8\u3051\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\n$result = \u95a2\u6570\u540d(\u5f15\u65701, \u5f15\u65702, ...);\n<\/pre>\n\n\n\n<p>\u5148\u307b\u3069\u5b9a\u7fa9\u3057\u305f <code>addNumbers<\/code> \u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u4f8b\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=\"\">$result = addNumbers(5, 3);\necho $result; \/\/ \u51fa\u529b: 8\n<\/pre>\n\n\n\n<p>\u307e\u305f\u3001\u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u76f4\u63a5\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">echo \"\u5408\u8a08: \" . addNumbers(10, 20); \/\/ \u51fa\u529b: \u5408\u8a08: 30\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u95a2\u6570\u5b9a\u7fa9\u306e\u4f4d\u7f6e\u3068\u547c\u3073\u51fa\u3057\u306e\u30bf\u30a4\u30df\u30f3\u30b0<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u3001\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u524d\u306b\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u95a2\u6570\u5b9a\u7fa9\u304c\u6761\u4ef6\u5206\u5c90\u5185\u306b\u3042\u308b\u5834\u5408\u306f\u4f8b\u5916\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6b63\u3057\u3044\u9806\u5e8f\nfunction greet($name) {\n    return \"\u3053\u3093\u306b\u3061\u306f\u3001\" . $name . \"\u3055\u3093\uff01\";\n}\n\necho greet(\"\u7530\u4e2d\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u7530\u4e2d\u3055\u3093\uff01\n<\/pre>\n\n\n\n<p>\u6761\u4ef6\u306b\u3088\u3063\u3066\u95a2\u6570\u5b9a\u7fa9\u3092\u5909\u3048\u308b\u4f8b\uff08\u901a\u5e38\u306f\u907f\u3051\u308b\u3079\u304d\u5b9f\u8df5\uff09\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$language = \"ja\";\n\nif ($language == \"ja\") {\n    function sayHello() {\n        return \"\u3053\u3093\u306b\u3061\u306f\uff01\";\n    }\n} else {\n    function sayHello() {\n        return \"Hello!\";\n    }\n}\n\necho sayHello(); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\uff01\n<\/pre>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u5185\u3067\u306e\u95a2\u6570\u5b9a\u7fa9\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u305f\u3081\u3001\u53ef\u80fd\u306a\u9650\u308a\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u623b\u308a\u5024\u306e\u306a\u3044\u95a2\u6570<\/h3>\n\n\n\n<p>\u95a2\u6570\u306f\u5fc5\u305a\u3057\u3082\u5024\u3092\u8fd4\u3059\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5358\u306b\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3060\u3051\u306e\u95a2\u6570\u3082\u4f5c\u6210\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function displayMessage($message) {\n    echo \"&lt;div class='message'&gt;\" . $message . \"&lt;\/div&gt;\";\n    \/\/ return\u6587\u304c\u306a\u3044\u5834\u5408\u3001null \u304c\u6697\u9ed9\u7684\u306b\u8fd4\u3055\u308c\u308b\n}\n\ndisplayMessage(\"\u91cd\u8981\u306a\u304a\u77e5\u3089\u305b\"); \/\/ \u51fa\u529b: &lt;div class='message'&gt;\u91cd\u8981\u306a\u304a\u77e5\u3089\u305b&lt;\/div&gt;\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\uff08Early Return\uff09\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3092\u6301\u3064\u95a2\u6570\u3067\u306f\u3001\u300c\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u300d\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getUserStatus($userId) {\n    \/\/ \u30e6\u30fc\u30b6\u30fcID\u304c\u7121\u52b9\u306a\u5834\u5408\u306f\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    if (empty($userId)) {\n        return \"\u30a8\u30e9\u30fc: \u30e6\u30fc\u30b6\u30fcID\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";\n    }\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    $user = getUserById($userId);\n    if (!$user) {\n        return \"\u30a8\u30e9\u30fc: \u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\";\n    }\n    \n    \/\/ \u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u7121\u52b9\u306a\u5834\u5408\u306f\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    if (!$user['active']) {\n        return \"\u30a8\u30e9\u30fc: \u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u7121\u52b9\u3067\u3059\";\n    }\n    \n    \/\/ \u3059\u3079\u3066\u306e\u6761\u4ef6\u3092\u30d1\u30b9\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n    return \"\u30a2\u30af\u30c6\u30a3\u30d6\";\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8907\u96d1\u306a\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u3092\u907f\u3051\u3001\u30b3\u30fc\u30c9\u306e\u30d5\u30ed\u30fc\u3092\u660e\u78ba\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">void\u578b\u306e\u623b\u308a\u5024\uff08PHP 7.1\u4ee5\u964d\uff09<\/h3>\n\n\n\n<p>PHP 7.1\u304b\u3089\u306f\u3001\u623b\u308a\u5024\u306e\u578b\u3068\u3057\u3066 <code>void<\/code> \u3092\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u95a2\u6570\u304c\u5024\u3092\u8fd4\u3055\u306a\u3044\u3053\u3068\u3092\u660e\u793a\u3057\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=\"\">function logMessage(string $message): void {\n    file_put_contents('app.log', date('Y-m-d H:i:s') . ': ' . $message . PHP_EOL, FILE_APPEND);\n    \/\/ return\u6587\u3067\u5024\u3092\u8fd4\u305d\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\n}\n\nlogMessage(\"\u30b7\u30b9\u30c6\u30e0\u3092\u521d\u671f\u5316\u3057\u307e\u3057\u305f\");\n<\/pre>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u95a2\u6570\u304c\u5024\u3092\u8fd4\u3055\u306a\u3044\u3053\u3068\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u3088\u308a\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u6b21\u306f\u95a2\u6570\u306e\u547d\u540d\u898f\u5247\u3084\u30b9\u30b3\u30fc\u30d7\u306a\u3069\u3001\u3088\u308a\u8a73\u7d30\u306a\u6982\u5ff5\u306b\u9032\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306e\u77e5\u8b58\u306f\u3001\u8aad\u307f\u3084\u3059\u304f\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u57fa\u76e4\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u547d\u540d\u898f\u5247<\/h3>\n\n\n\n<p>\u52b9\u679c\u7684\u306aPHP\u95a2\u6570\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u69cb\u6587\u3068\u547d\u540d\u898f\u5247\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u308f\u304b\u308a\u3084\u3059\u304f\u4e00\u8cab\u6027\u306e\u3042\u308b\u547d\u540d\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u3001\u4ed6\u306e\u958b\u767a\u8005\uff08\u305d\u3057\u3066\u5c06\u6765\u306e\u81ea\u5206\u81ea\u8eab\uff09\u304c\u30b3\u30fc\u30c9\u3092\u7406\u89e3\u3057\u3084\u3059\u304f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<p>\u307e\u305a\u3001PHP\u306b\u304a\u3051\u308b\u95a2\u6570\u5b9a\u7fa9\u306e\u57fa\u672c\u69cb\u6587\u3092\u78ba\u8a8d\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=\"\">function \u95a2\u6570\u540d($\u30d1\u30e9\u30e1\u30fc\u30bf1, $\u30d1\u30e9\u30e1\u30fc\u30bf2, ...) {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\n    return $\u623b\u308a\u5024; \/\/ \u30aa\u30d7\u30b7\u30e7\u30f3\n}\n<\/pre>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u578b\u5ba3\u8a00\u3092\u542b\u3081\u305f\u69cb\u6587\u3082\u63a8\u5968\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=\"\">function \u95a2\u6570\u540d(\u578b $\u30d1\u30e9\u30e1\u30fc\u30bf1, \u578b $\u30d1\u30e9\u30e1\u30fc\u30bf2): \u623b\u308a\u5024\u306e\u578b {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\n    return $\u623b\u308a\u5024;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u95a2\u6570\u306e\u547d\u540d\u898f\u5247<\/h4>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u547d\u540d\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u898f\u5247\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>camelCase \u307e\u305f\u306f snake_case \u3092\u4f7f\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>camelCase: <code>calculateTotalPrice()<\/code><\/li>\n\n\n\n<li>snake_case: <code>calculate_total_price()<\/code><\/li>\n\n\n\n<li>\u3069\u3061\u3089\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u4e00\u3064\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u3067\u306f\u4e00\u8cab\u6027\u3092\u6301\u305f\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u52d5\u8a5e\u304b\u3089\u59cb\u3081\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306f\u4f55\u3089\u304b\u306e\u52d5\u4f5c\u3092\u884c\u3046\u305f\u3081\u3001\u52d5\u8a5e\u304b\u3089\u59cb\u3081\u308b\u306e\u304c\u81ea\u7136\u3067\u3059<\/li>\n\n\n\n<li>\u4f8b: <code>getUser()<\/code>, <code>validateInput()<\/code>, <code>calculateTotal()<\/code>, <code>convertCurrency()<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u660e\u78ba\u3067\u8aac\u660e\u7684\u306a\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li><code>func1()<\/code> \u3084 <code>process()<\/code> \u306e\u3088\u3046\u306a\u66d6\u6627\u306a\u540d\u524d\u306f\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u95a2\u6570\u304c\u4f55\u3092\u3059\u308b\u306e\u304b\u3092\u660e\u78ba\u306b\u793a\u3059\u540d\u524d\u306b\u3059\u308b<\/li>\n\n\n\n<li>\u4f8b\u3048\u3070 <code>f()<\/code> \u3088\u308a\u3082 <code>calculateFibonacci()<\/code> \u306e\u65b9\u304c\u826f\u3044<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d6\u30fc\u30eb\u5024\u3092\u8fd4\u3059\u95a2\u6570\u306b\u306f <code>is<\/code>, <code>has<\/code>, <code>can<\/code> \u306a\u3069\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4f8b: <code>isValid()<\/code>, <code>hasPermission()<\/code>, <code>canAccess()<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u53d6\u5f97\u30fb\u8a2d\u5b9a\u95a2\u6570\u306b\u306f <code>get<\/code> \u3068 <code>set<\/code> \u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4f8b: <code>getUserName()<\/code>, <code>setUserName()<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4e00\u8cab\u6027\u3092\u4fdd\u3064<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u540c\u69d8\u306e\u6a5f\u80fd\u3092\u6301\u3064\u95a2\u6570\u306b\u306f\u540c\u69d8\u306e\u547d\u540d\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-14\">\u547d\u540d\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u4f8b\u306f\u3001\u826f\u3044\u95a2\u6570\u540d\u3068\u60aa\u3044\u95a2\u6570\u540d\u306e\u5bfe\u6bd4\u3092\u793a\u3057\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=\"\">\/\/ \u60aa\u3044\u4f8b\nfunction xyz($a, $b) {\n    return $a + $b;\n}\n\n\/\/ \u826f\u3044\u4f8b\nfunction add($a, $b) {\n    return $a + $b;\n}\n\n\/\/ \u3055\u3089\u306b\u826f\u3044\u4f8b\uff08\u578b\u5ba3\u8a00\u4ed8\u304d\uff09\nfunction addNumbers(float $a, float $b): float {\n    return $a + $b;\n}\n<\/pre>\n\n\n\n<p>\u3088\u308a\u8907\u96d1\u306a\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u4f55\u3092\u3059\u308b\u306e\u304b\u4e0d\u660e\u78ba\nfunction process($data) {\n    $data = trim($data);\n    $data = htmlspecialchars($data);\n    return $data;\n}\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u6a5f\u80fd\u304c\u660e\u78ba\nfunction sanitizeInput(string $data): string {\n    $data = trim($data);\n    $data = htmlspecialchars($data);\n    return $data;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">\u4e00\u822c\u7684\u306a\u547d\u540d\u30d1\u30bf\u30fc\u30f3<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001\u3088\u304f\u4f7f\u308f\u308c\u308b\u95a2\u6570\u547d\u540d\u30d1\u30bf\u30fc\u30f3\u3067\u3059\uff1a<\/p>\n\n\n<div id=\"id-0e98331d-6ea6-4c9d-9ad1-1fd3d15f0803\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9<\/th><th>\u7528\u9014<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>get<\/code><\/td><td>\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b<\/td><td><code>getUserById()<\/code>, <code>getConfig()<\/code><\/td><\/tr><tr><td><code>set<\/code><\/td><td>\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/td><td><code>setUserName()<\/code>, <code>setConfig()<\/code><\/td><\/tr><tr><td><code>is<\/code><\/td><td>\u30d6\u30fc\u30eb\u6761\u4ef6\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/td><td><code>isLoggedIn()<\/code>, <code>isValid()<\/code><\/td><\/tr><tr><td><code>has<\/code><\/td><td>\u6240\u6709\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/td><td><code>hasPermission()<\/code>, <code>hasChildren()<\/code><\/td><\/tr><tr><td><code>can<\/code><\/td><td>\u80fd\u529b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/td><td><code>canEdit()<\/code>, <code>canDelete()<\/code><\/td><\/tr><tr><td><code>calculate<\/code><\/td><td>\u8a08\u7b97\u3092\u884c\u3046<\/td><td><code>calculateTotal()<\/code>, <code>calculateTax()<\/code><\/td><\/tr><tr><td><code>validate<\/code><\/td><td>\u5165\u529b\u3092\u691c\u8a3c\u3059\u308b<\/td><td><code>validateEmail()<\/code>, <code>validateForm()<\/code><\/td><\/tr><tr><td><code>format<\/code><\/td><td>\u30c7\u30fc\u30bf\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b<\/td><td><code>formatDate()<\/code>, <code>formatCurrency()<\/code><\/td><\/tr><tr><td><code>convert<\/code><\/td><td>\u5909\u63db\u3092\u884c\u3046<\/td><td><code>convertToArray()<\/code>, <code>convertCurrency()<\/code><\/td><\/tr><tr><td><code>build<\/code><\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u69cb\u7bc9\u3059\u308b<\/td><td><code>buildQuery()<\/code>, <code>buildResponse()<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">PHP\u4e88\u7d04\u8a9e\u3068\u95a2\u6570\u540d<\/h4>\n\n\n\n<p>PHP\u306e\u4e88\u7d04\u8a9e\u306f\u95a2\u6570\u540d\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<code>list<\/code>, <code>echo<\/code>, <code>include<\/code>, <code>require<\/code>, <code>return<\/code> \u306a\u3069\u306f\u95a2\u6570\u540d\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\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=\"\">\/\/ \u3053\u308c\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308b\nfunction echo($message) {\n    \/\/ ...\n}\n\n\/\/ \u4ee3\u308f\u308a\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308b\nfunction echoMessage($message) {\n    \/\/ ...\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">PSR-12\u3068\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04<\/h4>\n\n\n\n<p>PHP-FIG\u306e <a href=\"https:\/\/www.php-fig.org\/psr\/psr-12\/\">PSR-12<\/a> \u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u3067\u306f\u3001\u95a2\u6570\u306e\u547d\u540d\u3068\u30b9\u30bf\u30a4\u30eb\u306b\u3064\u3044\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30bd\u30c3\u30c9\u540d\u306f camelCase \u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u4e2d\u62ec\u5f27\u306f\u95a2\u6570\u5ba3\u8a00\u306e\u6b21\u306e\u884c\u306b\u7f6e\u304f<\/li>\n\n\n\n<li>\u62ec\u5f27\u306e\u524d\u5f8c\u306b\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u306a\u3044<\/li>\n\n\n\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30ab\u30f3\u30de\u306e\u5f8c\u306b\u306f\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\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=\"\">\/\/ PSR-12\u306b\u6e96\u62e0\u3057\u305f\u95a2\u6570\u5b9a\u7fa9\nfunction calculateAreaOfCircle(float $radius): float\n{\n    return pi() * pow($radius, 2);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">\u540d\u524d\u7a7a\u9593\u5185\u306e\u95a2\u6570<\/h4>\n\n\n\n<p>PHP 5.3\u4ee5\u964d\u3067\u306f\u3001\u540d\u524d\u7a7a\u9593\u5185\u3067\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u306a\u308b\u540d\u524d\u7a7a\u9593\u5185\u3067\u540c\u3058\u540d\u524d\u306e\u95a2\u6570\u3092\u6301\u3064\u3053\u3068\u304c\u53ef\u80fd\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=\"\">namespace Utilities;\n\nfunction formatDate($date, $format = 'Y-m-d')\n{\n    return date($format, strtotime($date));\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$formattedDate = \\Utilities\\formatDate('2025-01-15');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\uff1a\u5546\u54c1\u5272\u5f15\u8a08\u7b97\u95a2\u6570<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001\u9069\u5207\u306a\u547d\u540d\u3068\u69cb\u6587\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u7528\u7684\u306a\u95a2\u6570\u306e\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u5546\u54c1\u306e\u5272\u5f15\u5f8c\u4fa1\u683c\u3092\u8a08\u7b97\u3059\u308b\n *\n * @param float $price \u5143\u306e\u4fa1\u683c\n * @param float $discountPercent \u5272\u5f15\u7387\uff08\u30d1\u30fc\u30bb\u30f3\u30c8\uff09\n * @param bool $applyTax \u6d88\u8cbb\u7a0e\u3092\u9069\u7528\u3059\u308b\u304b\u3069\u3046\u304b\n * @return float \u5272\u5f15\u5f8c\u306e\u4fa1\u683c\uff08\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u306b\u56db\u6368\u4e94\u5165\uff09\n *\/\nfunction calculateDiscountedPrice(float $price, float $discountPercent, bool $applyTax = true): float\n{\n    \/\/ \u5272\u5f15\u306e\u8a08\u7b97\n    $discountAmount = $price * ($discountPercent \/ 100);\n    $discountedPrice = $price - $discountAmount;\n    \n    \/\/ \u7a0e\u91d1\u306e\u9069\u7528\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\n    if ($applyTax) {\n        $taxRate = 0.10; \/\/ 10%\u306e\u6d88\u8cbb\u7a0e\n        $discountedPrice = $discountedPrice * (1 + $taxRate);\n    }\n    \n    \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u306b\u56db\u6368\u4e94\u5165\u3057\u3066\u8fd4\u3059\n    return round($discountedPrice, 2);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$originalPrice = 5000;\n$discountPercent = 20;\n\n$finalPrice = calculateDiscountedPrice($originalPrice, $discountPercent);\necho \"\u5272\u5f15\u5f8c\u4fa1\u683c\uff08\u7a0e\u8fbc\uff09: \" . $finalPrice . \"\u5186\"; \/\/ \u51fa\u529b: \u5272\u5f15\u5f8c\u4fa1\u683c\uff08\u7a0e\u8fbc\uff09: 4400\u5186\n\n$priceWithoutTax = calculateDiscountedPrice($originalPrice, $discountPercent, false);\necho \"\u5272\u5f15\u5f8c\u4fa1\u683c\uff08\u7a0e\u629c\uff09: \" . $priceWithoutTax . \"\u5186\"; \/\/ \u51fa\u529b: \u5272\u5f15\u5f8c\u4fa1\u683c\uff08\u7a0e\u629c\uff09: 4000\u5186\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-20\">\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u9069\u5207\u306a\u95a2\u6570\u306e\u547d\u540d\u3068\u69cb\u6587\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u540d\u306f\u52d5\u8a5e\u304b\u3089\u59cb\u3081\u3001\u305d\u306e\u6a5f\u80fd\u3092\u660e\u78ba\u306b\u8868\u3059<\/li>\n\n\n\n<li>camelCase \u307e\u305f\u306f snake_case \u3092\u4e00\u8cab\u3057\u3066\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u578b\u5ba3\u8a00\u3092\u6d3b\u7528\u3057\u3066\u95a2\u6570\u306e\u610f\u56f3\u3092\u3088\u308a\u660e\u78ba\u306b\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9\u3068\u30b9\u30b3\u30fc\u30d7\u306e\u7406\u89e3<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9\u3060\u3051\u3067\u306a\u304f\u3001\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u3064\u3044\u3066\u3082\u6df1\u304f\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9\u3068\u5909\u6570\u30b9\u30b3\u30fc\u30d7\u306e\u8003\u3048\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u547c\u3073\u51fa\u3057\u65b9<\/h4>\n\n\n\n<p>PHP\u3067\u306e\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u306f\u3001\u95a2\u6570\u540d\u306b\u7d9a\u3051\u3066\u62ec\u5f27\u3092\u4ed8\u3051\u3001\u5fc5\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3059\u3053\u3068\u3067\u884c\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\n$result = functionName($param1, $param2);\n<\/pre>\n\n\n\n<p>\u547c\u3073\u51fa\u3057\u6642\u306e\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9806\u5e8f\u3068\u578b\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u305d\u306e\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function greetUser($name, $greeting = '\u3053\u3093\u306b\u3061\u306f') {\n    return $greeting . ', ' . $name . '\u3055\u3093!';\n}\n\n\/\/ \u6a19\u6e96\u306e\u547c\u3073\u51fa\u3057\necho greetUser('\u7530\u4e2d'); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f, \u7530\u4e2d\u3055\u3093!\n\n\/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u3059\u3079\u3066\u6307\u5b9a\necho greetUser('\u4f50\u85e4', '\u304a\u306f\u3088\u3046'); \/\/ \u51fa\u529b: \u304a\u306f\u3088\u3046, \u4f50\u85e4\u3055\u3093!\n\n\/\/ PHP 8.0\u4ee5\u964d\u3067\u306f\u540d\u524d\u4ed8\u304d\u5f15\u6570\u304c\u4f7f\u7528\u53ef\u80fd\necho greetUser(greeting: '\u3053\u3093\u3070\u3093\u306f', name: '\u5c71\u7530'); \/\/ \u51fa\u529b: \u3053\u3093\u3070\u3093\u306f, \u5c71\u7530\u3055\u3093!\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\uff1a\u30ed\u30fc\u30ab\u30eb\u3068\u30b0\u30ed\u30fc\u30d0\u30eb<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306f\u4e3b\u306b\u300c\u30b0\u30ed\u30fc\u30d0\u30eb\u300d\u3068\u300c\u30ed\u30fc\u30ab\u30eb\u300d\u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30ed\u30fc\u30ab\u30eb\u30b9\u30b3\u30fc\u30d7<\/strong>\u306f\u3001\u95a2\u6570\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u5909\u6570\u304c\u95a2\u6570\u5185\u3067\u306e\u307f\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function calculateTotal($price, $quantity) {\n    $total = $price * $quantity; \/\/ $total\u306f\u3053\u306e\u95a2\u6570\u5185\u3067\u306e\u307f\u6709\u52b9\n    return $total;\n}\n\ncalculateTotal(1000, 5);\n\/\/ \u3053\u3053\u3067 $total \u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u672a\u5b9a\u7fa9\u30a8\u30e9\u30fc\u306b\u306a\u308b\n\/\/ echo $total; \/\/ \u30a8\u30e9\u30fc: Undefined variable $total\n<\/pre>\n\n\n\n<p><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7<\/strong>\u306f\u3001\u95a2\u6570\u306e\u5916\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u3059\u3002\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u3001\u95a2\u6570\u5185\u304b\u3089\u306f\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$globalVar = \"\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\";\n\nfunction testScope() {\n    echo $globalVar; \/\/ \u8b66\u544a: Undefined variable $globalVar\n}\n\ntestScope(); \/\/ \u4f55\u3082\u51fa\u529b\u3055\u308c\u306a\u3044\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">global\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u4f7f\u7528<\/h4>\n\n\n\n<p>\u95a2\u6570\u5185\u304b\u3089\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001<code>global<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$counter = 0;\n\nfunction incrementCounter() {\n    global $counter; \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n    $counter++;\n}\n\necho $counter; \/\/ \u51fa\u529b: 0\nincrementCounter();\necho $counter; \/\/ \u51fa\u529b: 1\n<\/pre>\n\n\n\n<p>\u305f\u3060\u3057\u3001<code>global<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u591a\u7528\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u305f\u3081\u3001\u4e00\u822c\u7684\u306b\u306f\u5f15\u6570\u3068\u623b\u308a\u5024\u3092\u4f7f\u7528\u3057\u3066\u5024\u306e\u3084\u308a\u53d6\u308a\u3092\u884c\u3046\u65b9\u304c\u597d\u307e\u3057\u3044\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$counter = 0;\n\n\/\/ \u3088\u308a\u826f\u3044\u65b9\u6cd5\nfunction incrementValue($value) {\n    return $value + 1;\n}\n\n$counter = incrementValue($counter);\necho $counter; \/\/ \u51fa\u529b: 1\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">$GLOBALS\u30b9\u30fc\u30d1\u30fc\u30b0\u30ed\u30fc\u30d0\u30eb<\/h4>\n\n\n\n<p>\u3082\u3046\u4e00\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u306f\u3001<code>$GLOBALS<\/code>\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$message = \"Hello World\";\n\nfunction displayMessage() {\n    echo $GLOBALS['message'];\n}\n\ndisplayMessage(); \/\/ \u51fa\u529b: Hello World\n<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u3082<code>global<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u540c\u69d8\u306b\u3001\u904e\u5ea6\u306e\u4f7f\u7528\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">\u9759\u7684\uff08static\uff09\u5909\u6570<\/h4>\n\n\n\n<p>\u95a2\u6570\u5185\u3067<code>static<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u95a2\u6570\u306e\u8907\u6570\u56de\u306e\u547c\u3073\u51fa\u3057\u306b\u307e\u305f\u304c\u3063\u3066\u5024\u304c\u4fdd\u6301\u3055\u308c\u308b\u9759\u7684\u5909\u6570\u3092\u5b9a\u7fa9\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=\"\">function countCalls() {\n    static $count = 0; \/\/ \u521d\u671f\u5316\u306f\u6700\u521d\u306e\u547c\u3073\u51fa\u3057\u6642\u306e\u307f\u5b9f\u884c\u3055\u308c\u308b\n    $count++;\n    return $count;\n}\n\necho countCalls(); \/\/ \u51fa\u529b: 1\necho countCalls(); \/\/ \u51fa\u529b: 2\necho countCalls(); \/\/ \u51fa\u529b: 3\n<\/pre>\n\n\n\n<p>\u9759\u7684\u5909\u6570\u306f\u3001\u95a2\u6570\u306e\u72b6\u614b\u3092\u7dad\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u524d\u306e\u8a08\u7b97\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u95a2\u6570\u306a\u3069\u306b\u9069\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function expensiveCalculation($input) {\n    static $cache = [];\n    \n    \/\/ \u7d50\u679c\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u518d\u8a08\u7b97\u305b\u305a\u306b\u8fd4\u3059\n    if (isset($cache[$input])) {\n        echo \"\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97: \";\n        return $cache[$input];\n    }\n    \n    \/\/ \u91cd\u3044\u8a08\u7b97\u3092\u5b9f\u884c\uff08\u3053\u306e\u4f8b\u3067\u306f\u30b7\u30f3\u30d7\u30eb\u306b\u3057\u3066\u3044\u307e\u3059\uff09\n    echo \"\u8a08\u7b97\u5b9f\u884c: \";\n    $result = $input * $input;\n    \n    \/\/ \u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\n    $cache[$input] = $result;\n    \n    return $result;\n}\n\necho expensiveCalculation(4) . \"\\n\"; \/\/ \u51fa\u529b: \u8a08\u7b97\u5b9f\u884c: 16\necho expensiveCalculation(4) . \"\\n\"; \/\/ \u51fa\u529b: \u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97: 16\necho expensiveCalculation(5) . \"\\n\"; \/\/ \u51fa\u529b: \u8a08\u7b97\u5b9f\u884c: 25\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u30af\u30ed\u30fc\u30b8\u30e3\u3068\u30b9\u30b3\u30fc\u30d7<\/h4>\n\n\n\n<p>PHP\u306e\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u306f\u3001<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$greeting = \"\u3053\u3093\u306b\u3061\u306f\";\n\n$greet = function($name) use ($greeting) {\n    return $greeting . \", \" . $name . \"\u3055\u3093!\";\n};\n\necho $greet(\"\u9234\u6728\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f, \u9234\u6728\u3055\u3093!\n\n\/\/ \u5143\u306e\u5909\u6570\u3092\u5909\u66f4\u3057\u3066\u3082\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u306e\u5024\u306f\u5909\u308f\u3089\u306a\u3044\n$greeting = \"\u304a\u306f\u3088\u3046\";\necho $greet(\"\u9234\u6728\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f, \u9234\u6728\u3055\u3093!\n<\/pre>\n\n\n\n<p>\u5024\u3067\u306f\u306a\u304f\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$counter = 0;\n\n$increment = function() use (&amp;$counter) {\n    $counter++;\n};\n\n$increment();\n$increment();\necho $counter; \/\/ \u51fa\u529b: 2\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u30ed\u30b0\u30a4\u30f3\u8ffd\u8de1<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001\u30b9\u30b3\u30fc\u30d7\u3068\u9759\u7684\u5909\u6570\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function trackUserLogin($userId) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u6700\u7d42\u30ed\u30b0\u30a4\u30f3\u6642\u9593\u3092\u8ffd\u8de1\u3059\u308b\u9759\u7684\u914d\u5217\n    static $lastLogins = [];\n    \n    \/\/ \u73fe\u5728\u306e\u6642\u9593\n    $currentTime = time();\n    \n    \/\/ \u524d\u56de\u306e\u30ed\u30b0\u30a4\u30f3\u6642\u9593\u3092\u53d6\u5f97\uff08\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306fnull\uff09\n    $previousLogin = $lastLogins[$userId] ?? null;\n    \n    \/\/ \u6700\u7d42\u30ed\u30b0\u30a4\u30f3\u6642\u9593\u3092\u66f4\u65b0\n    $lastLogins[$userId] = $currentTime;\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u5168\u30ed\u30b0\u30a4\u30f3\u60c5\u5831\u3092\u8ffd\u8de1\n    trackAllLogins($userId, $currentTime);\n    \n    \/\/ \u524d\u56de\u306e\u30ed\u30b0\u30a4\u30f3\u60c5\u5831\u3092\u8fd4\u3059\n    return $previousLogin ? date('Y-m-d H:i:s', $previousLogin) : 'First login';\n}\n\n\/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u914d\u5217\u306b\u3059\u3079\u3066\u306e\u30ed\u30b0\u30a4\u30f3\u3092\u8a18\u9332\u3059\u308b\u95a2\u6570\nfunction trackAllLogins($userId, $timestamp) {\n    global $allLoginRecords;\n    \n    if (!isset($allLoginRecords[$userId])) {\n        $allLoginRecords[$userId] = [];\n    }\n    \n    $allLoginRecords[$userId][] = $timestamp;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$allLoginRecords = [];\n\necho \"\u30e6\u30fc\u30b6\u30fc1\u306e\u524d\u56de\u30ed\u30b0\u30a4\u30f3: \" . trackUserLogin(1) . \"\\n\"; \/\/ \u51fa\u529b: First login\nsleep(2); \/\/ 2\u79d2\u5f85\u6a5f\necho \"\u30e6\u30fc\u30b6\u30fc2\u306e\u524d\u56de\u30ed\u30b0\u30a4\u30f3: \" . trackUserLogin(2) . \"\\n\"; \/\/ \u51fa\u529b: First login\nsleep(2); \/\/ 2\u79d2\u5f85\u6a5f\necho \"\u30e6\u30fc\u30b6\u30fc1\u306e\u524d\u56de\u30ed\u30b0\u30a4\u30f3: \" . trackUserLogin(1) . \"\\n\"; \/\/ \u30e6\u30fc\u30b6\u30fc1\u306e\u524d\u56de\u30ed\u30b0\u30a4\u30f3\u6642\u9593\u304c\u8868\u793a\u3055\u308c\u308b\n\n\/\/ \u3059\u3079\u3066\u306e\u30ed\u30b0\u30a4\u30f3\u8a18\u9332\u3092\u8868\u793a\nforeach ($allLoginRecords as $userId =&gt; $logins) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\" . $userId . \"\u306e\u30ed\u30b0\u30a4\u30f3\u56de\u6570: \" . count($logins) . \"\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">\u30b9\u30b3\u30fc\u30d7\u306b\u95a2\u3059\u308b\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h4>\n\n\n\n<p><strong>1. \u5909\u6570\u306e\u30b7\u30e3\u30c9\u30fc\u30a4\u30f3\u30b0<\/strong><\/p>\n\n\n\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u540c\u3058\u540d\u524d\u306e\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u304c\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u300c\u30b7\u30e3\u30c9\u30fc\u30a4\u30f3\u30b0\u300d\uff08\u96a0\u3059\uff09\u3057\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=\"\">$value = 10;\n\nfunction test() {\n    $value = 20; \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3068\u306f\u5225\u306e\u5909\u6570\n    echo \"\u30ed\u30fc\u30ab\u30eb\u5909\u6570: $value\\n\";\n}\n\ntest(); \/\/ \u51fa\u529b: \u30ed\u30fc\u30ab\u30eb\u5909\u6570: 20\necho \"\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570: $value\\n\"; \/\/ \u51fa\u529b: \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570: 10\n<\/pre>\n\n\n\n<p><strong>\u89e3\u6c7a\u7b56<\/strong>: \u7570\u306a\u308b\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u5024\u3092\u6e21\u3059\u65b9\u6cd5\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>2. \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u904e\u5270\u4f7f\u7528<\/strong><\/p>\n\n\n\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u904e\u5270\u306a\u4f7f\u7528\u306f\u30b3\u30fc\u30c9\u306e\u8907\u96d1\u6027\u3068\u4e88\u6e2c\u4e0d\u53ef\u80fd\u6027\u3092\u9ad8\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u89e3\u6c7a\u7b56<\/strong>: \u4f9d\u5b58\u6027\u6ce8\u5165\u30d1\u30bf\u30fc\u30f3\u3092\u63a1\u7528\u3057\u3001\u5fc5\u8981\u306a\u5024\u306f\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b: \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u4f9d\u5b58\n$config = ['db_host' =&gt; 'localhost', 'db_user' =&gt; 'root'];\n\nfunction connectToDatabase() {\n    global $config;\n    \/\/ $config\u3092\u4f7f\u7528\u3057\u3066\u63a5\u7d9a\n}\n\n\/\/ \u826f\u3044\u4f8b: \u4f9d\u5b58\u6027\u306e\u6ce8\u5165\nfunction connectToDatabase($config) {\n    \/\/ $config\u3092\u4f7f\u7528\u3057\u3066\u63a5\u7d9a\n}\n\n$config = ['db_host' =&gt; 'localhost', 'db_user' =&gt; 'root'];\nconnectToDatabase($config);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">\u307e\u3068\u3081<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u306f\u3001\u95a2\u6570\u540d\u306b\u7d9a\u3051\u3066\u62ec\u5f27\u5185\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002PHP 8.0\u4ee5\u964d\u3067\u306f\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3082\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li>PHP\u306e\u5909\u6570\u30b9\u30b3\u30fc\u30d7\u306b\u306f\u4e3b\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u3068\u30ed\u30fc\u30ab\u30eb\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u306f\u3001<code>global<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u307e\u305f\u306f<code>$GLOBALS<\/code>\u914d\u5217\u3092\u901a\u3058\u3066\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u304c\u3001\u4f7f\u7528\u306f\u6700\u5c0f\u9650\u306b\u7559\u3081\u308b\u3079\u304d\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u9759\u7684\u5909\u6570\uff08<code>static<\/code>\uff09\u306f\u3001\u95a2\u6570\u306e\u8907\u6570\u56de\u306e\u547c\u3073\u51fa\u3057\u306b\u308f\u305f\u3063\u3066\u5024\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u30af\u30ed\u30fc\u30b8\u30e3\u306f<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u826f\u3044\u95a2\u6570\u8a2d\u8a08\u3067\u306f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3078\u306e\u4f9d\u5b58\u3092\u6700\u5c0f\u9650\u306b\u3057\u3001\u4ee3\u308f\u308a\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u6e21\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\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-31\">PHP\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024<\/h2>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u771f\u306e\u529b\u3092\u5f15\u304d\u51fa\u3059\u306b\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001PHP\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u306b\u95a2\u3059\u308b\u6982\u5ff5\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u5f15\u6570\uff09\u306f\u95a2\u6570\u306b\u6e21\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3067\u3001\u623b\u308a\u5024\u306f\u95a2\u6570\u304c\u51e6\u7406\u3092\u5b8c\u4e86\u3057\u305f\u5f8c\u306b\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u30c7\u30fc\u30bf\u3067\u3059\u3002\u3053\u308c\u3089\u3092\u9069\u5207\u306b\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u518d\u5229\u7528\u53ef\u80fd\u306a\u95a2\u6570\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u3068\u578b\u5ba3\u8a00<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">\u57fa\u672c\u7684\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u4f7f\u7528\u6cd5<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u95a2\u6570\u306f\u8907\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u62ec\u5f27\u5185\u306b\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u5b9a\u7fa9\u3057\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=\"\">function calculateRectangleArea($width, $height) {\n    return $width * $height;\n}\n\n$area = calculateRectangleArea(10, 5);\necho $area; \/\/ \u51fa\u529b: 50\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf<\/h4>\n\n\n\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u306f\u3001\u5fc5\u9808\u306e\u3082\u306e\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\uff08\u7701\u7565\u53ef\u80fd\uff09\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function greet($name, $greeting = '\u3053\u3093\u306b\u3061\u306f') {\n    return \"$greeting, $name \u3055\u3093\uff01\";\n}\n\necho greet('\u7530\u4e2d'); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f, \u7530\u4e2d \u3055\u3093\uff01\necho greet('\u4f50\u85e4', '\u304a\u306f\u3088\u3046'); \/\/ \u51fa\u529b: \u304a\u306f\u3088\u3046, \u4f50\u85e4 \u3055\u3093\uff01\n<\/pre>\n\n\n\n<p><strong>\u91cd\u8981<\/strong>: \u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5f8c\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6b63\u3057\u304f\u306a\u3044\u4f8b - PHP Parse error\nfunction incorrectOrder($optional = '\u30c7\u30d5\u30a9\u30eb\u30c8', $required) {\n    \/\/ \u30b3\u30fc\u30c9\n}\n\n\/\/ \u6b63\u3057\u3044\u4f8b\nfunction correctOrder($required, $optional = '\u30c7\u30d5\u30a9\u30eb\u30c8') {\n    \/\/ \u30b3\u30fc\u30c9\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">PHP 7\u4ee5\u964d\u306e\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u3092\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u5b89\u5168\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3057\u305f\u3002\u578b\u5ba3\u8a00\u306b\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>\u30b9\u30ab\u30e9\u30fc\u578b\u306e\u5ba3\u8a00<\/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=\"\">function addNumbers(int $a, int $b): int {\n    return $a + $b;\n}\n\necho addNumbers(5, 10); \/\/ \u51fa\u529b: 15\n<\/pre>\n\n\n\n<p><strong>\u8907\u5408\u578b\u306e\u5ba3\u8a00<\/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=\"\">\/\/ \u914d\u5217\u578b\u306e\u5ba3\u8a00\nfunction calculateTotal(array $items): float {\n    return array_sum($items);\n}\n\n\/\/ \u30af\u30e9\u30b9\u578b\u306e\u5ba3\u8a00\nfunction processUser(User $user): void {\n    \/\/ User\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u51e6\u7406\n}\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u578b\u306e\u5ba3\u8a00\nfunction saveData(Serializable $data): bool {\n    \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-36\">\u578b\u5f37\u5236\u3068\u53b3\u683c\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/h4>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001PHP\u306f\u578b\u5f37\u5236\uff08type coercion\uff09\u3092\u884c\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u6587\u5b57\u5217\u306e\u300c5\u300d\u304c\u6574\u6570\u306e5\u306b\u5909\u63db\u3055\u308c\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=\"\">function double(int $number): int {\n    return $number * 2;\n}\n\necho double(\"5\"); \/\/ \u51fa\u529b: 10 (\u6587\u5b57\u5217\"5\"\u304c\u6574\u65705\u306b\u5909\u63db\u3055\u308c\u308b)\n<\/pre>\n\n\n\n<p>\u3088\u308a\u53b3\u683c\u306a\u578b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u306f\u3001<code>declare(strict_types=1);<\/code>\u3092\u30d5\u30a1\u30a4\u30eb\u306e\u5148\u982d\u306b\u8ffd\u52a0\u3057\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=\"\">&lt;?php\ndeclare(strict_types=1);\n\nfunction double(int $number): int {\n    return $number * 2;\n}\n\necho double(5); \/\/ \u51fa\u529b: 10\necho double(\"5\"); \/\/ TypeError: double(): Argument #1 ($number) must be of type int, string given\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-37\">Nullable\u306a\u578b\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30d1\u30e9\u30e1\u30fc\u30bf<\/h4>\n\n\n\n<p>PHP 7.1\u4ee5\u964d\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u304cnull\u3092\u8a31\u5bb9\u3059\u308b\u3053\u3068\u3092\u793a\u3059\u300cnullable\u300d\u578b\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\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=\"\">function processData(?string $data): ?array {\n    if ($data === null) {\n        return null;\n    }\n    \/\/ \u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3057\u3066\u914d\u5217\u3092\u8fd4\u3059\n    return explode(',', $data);\n}\n\n$result1 = processData(\"apple,banana,orange\");\nprint_r($result1); \/\/ ['apple', 'banana', 'orange']\u3092\u51fa\u529b\n\n$result2 = processData(null);\nvar_dump($result2); \/\/ NULL \u3092\u51fa\u529b\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">PHP 8.0\u306e\u5171\u7528\u578b\uff08Union Types\uff09<\/h4>\n\n\n\n<p>PHP 8.0\u3067\u306f\u3001\u5171\u7528\u578b\uff08Union Types\uff09\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3084\u623b\u308a\u5024\u304c\u8907\u6570\u306e\u578b\u306e\u3044\u305a\u308c\u304b\u306b\u306a\u308b\u3053\u3068\u3092\u793a\u305b\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=\"\">function processInput(string|int $input): string|int {\n    if (is_string($input)) {\n        return strtoupper($input);\n    }\n    return $input * 2;\n}\n\necho processInput(\"hello\"); \/\/ \u51fa\u529b: HELLO\necho processInput(5);       \/\/ \u51fa\u529b: 10\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u53ef\u5909\u9577\u5f15\u6570\u30ea\u30b9\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-40\">\u53ef\u5909\u9577\u5f15\u6570\uff08variadic parameters\uff09<\/h4>\n\n\n\n<p>PHP 5.6\u4ee5\u964d\u3067\u306f\u3001\u300c\u2026\u300d\uff08\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff09\u3092\u4f7f\u7528\u3057\u3066\u53ef\u5909\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b\u95a2\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function sum(...$numbers) {\n    return array_sum($numbers);\n}\n\necho sum(1, 2, 3, 4, 5); \/\/ \u51fa\u529b: 15\necho sum(10, 20);        \/\/ \u51fa\u529b: 30\n<\/pre>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u578b\u5ba3\u8a00\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function sumIntegers(int ...$numbers): int {\n    return array_sum($numbers);\n}\n\necho sumIntegers(1, 2, 3); \/\/ \u51fa\u529b: 6\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u901a\u5e38\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u4ed6\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u5e38\u306b\u6700\u5f8c\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function createMessage($greeting, ...$names) {\n    return $greeting . ' ' . implode(', ', $names) . '!';\n}\n\necho createMessage('\u3053\u3093\u306b\u3061\u306f', '\u7530\u4e2d', '\u4f50\u85e4', '\u9234\u6728'); \n\/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f \u7530\u4e2d, \u4f50\u85e4, \u9234\u6728!\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">\u914d\u5217\u306e\u5c55\u958b\uff08\u30a2\u30f3\u30d1\u30c3\u30af\uff09<\/h4>\n\n\n\n<p>\u9006\u306b\u3001\u914d\u5217\u3092\u500b\u3005\u306e\u5f15\u6570\u3068\u3057\u3066\u95a2\u6570\u306b\u6e21\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function multiply($a, $b, $c) {\n    return $a * $b * $c;\n}\n\n$numbers = [2, 3, 4];\necho multiply(...$numbers); \/\/ \u51fa\u529b: 24\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-43\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u3068\u8907\u6570\u306e\u623b\u308a\u5024\u306e\u6271\u3044\u65b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">\u623b\u308a\u5024\u306e\u57fa\u672c<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001<code>return<\/code>\u6587\u3092\u4f7f\u7528\u3057\u3066\u95a2\u6570\u304b\u3089\u5024\u3092\u8fd4\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function square($number) {\n    return $number * $number;\n}\n\n$result = square(4);\necho $result; \/\/ \u51fa\u529b: 16\n<\/pre>\n\n\n\n<p>\u95a2\u6570\u5185\u3067\u8907\u6570\u306e<code>return<\/code>\u6587\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getStatus($code) {\n    if ($code === 200) {\n        return \"OK\";\n    } elseif ($code === 404) {\n        return \"Not Found\";\n    } else {\n        return \"Unknown Status\";\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u95a2\u6570\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u5ba3\u8a00\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=\"\">function divide(float $a, float $b): float {\n    if ($b === 0.0) {\n        throw new Exception(\"0\u3067\u5272\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\");\n    }\n    return $a \/ $b;\n}\n<\/pre>\n\n\n\n<p>\u4f55\u3082\u8fd4\u3055\u306a\u3044\u95a2\u6570\u306b\u306f\u3001<code>void<\/code>\u578b\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff08PHP 7.1\u4ee5\u964d\uff09\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=\"\">function logMessage(string $message): void {\n    file_put_contents('app.log', date('Y-m-d H:i:s') . ': ' . $message . PHP_EOL, FILE_APPEND);\n    \/\/ return\u6587\u3067\u5024\u3092\u8fd4\u305d\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u65b9\u6cd5<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u5358\u4e00\u306e<code>return<\/code>\u6587\u3067\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u76f4\u63a5\u7684\u306a\u65b9\u6cd5\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u4ee3\u308f\u308a\u306b\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getCoordinates($address): array {\n    \/\/ \u4f4f\u6240\u304b\u3089\u5ea7\u6a19\u3092\u8a08\u7b97\u3059\u308b\u51e6\u7406\n    $lat = 35.6812;  \/\/ \u4eee\u306e\u7def\u5ea6\n    $lng = 139.7671; \/\/ \u4eee\u306e\u7d4c\u5ea6\n    return ['latitude' =&gt; $lat, 'longitude' =&gt; $lng];\n}\n\n$location = getCoordinates(\"\u6771\u4eac\u90fd\u5343\u4ee3\u7530\u533a\");\necho \"\u7def\u5ea6: \" . $location['latitude'] . \", \u7d4c\u5ea6: \" . $location['longitude'];\n\/\/ \u51fa\u529b: \u7def\u5ea6: 35.6812, \u7d4c\u5ea6: 139.7671\n<\/pre>\n\n\n\n<p><strong>\u30ea\u30b9\u30c8\u69cb\u9020\u3092\u4f7f\u7528\u3057\u3066\u3059\u3050\u306b\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u65b9\u6cd5<\/strong>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getDimensions($image): array {\n    \/\/ \u753b\u50cf\u306e\u5e45\u3068\u9ad8\u3055\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\n    return [1920, 1080];\n}\n\n[$width, $height] = getDimensions(\"photo.jpg\");\necho \"\u5e45: $width px, \u9ad8\u3055: $height px\";\n\/\/ \u51fa\u529b: \u5e45: 1920 px, \u9ad8\u3055: 1080 px\n<\/pre>\n\n\n\n<p><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/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=\"\">class Result {\n    public $value;\n    public $error;\n    \n    public function __construct($value, $error = null) {\n        $this-&gt;value = $value;\n        $this-&gt;error = $error;\n    }\n}\n\nfunction divide($a, $b): Result {\n    if ($b === 0) {\n        return new Result(null, \"0\u3067\u5272\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\");\n    }\n    return new Result($a \/ $b);\n}\n\n$result = divide(10, 2);\nif ($result-&gt;error) {\n    echo \"\u30a8\u30e9\u30fc: \" . $result-&gt;error;\n} else {\n    echo \"\u7d50\u679c: \" . $result-&gt;value; \/\/ \u51fa\u529b: \u7d50\u679c: 5\n}\n\n$result = divide(10, 0);\nif ($result-&gt;error) {\n    echo \"\u30a8\u30e9\u30fc: \" . $result-&gt;error; \/\/ \u51fa\u529b: \u30a8\u30e9\u30fc: 0\u3067\u5272\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\n} else {\n    echo \"\u7d50\u679c: \" . $result-&gt;value;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">PHP 8.0\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570<\/h4>\n\n\n\n<p>PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u6c17\u306b\u305b\u305a\u306b\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\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=\"\">function createUser(string $name, string $email, int $age = 30, bool $active = true) {\n    return [\n        'name' =&gt; $name,\n        'email' =&gt; $email,\n        'age' =&gt; $age,\n        'active' =&gt; $active\n    ];\n}\n\n\/\/ \u9806\u5e8f\u306b\u5f93\u3063\u305f\u5f93\u6765\u306e\u547c\u3073\u51fa\u3057\n$user1 = createUser(\"\u5c71\u7530\u592a\u90ce\", \"yamada@example.com\", 25, false);\n\n\/\/ \u540d\u524d\u4ed8\u304d\u5f15\u6570\u3092\u4f7f\u7528\u3057\u305f\u547c\u3073\u51fa\u3057\uff08PHP 8.0\u4ee5\u964d\uff09\n$user2 = createUser(\n    name: \"\u9234\u6728\u82b1\u5b50\",\n    email: \"suzuki@example.com\",\n    active: false\n    \/\/ age\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u304c\u4f7f\u7528\u3055\u308c\u308b\n);\n\nprint_r($user2);\n\/* \u51fa\u529b:\nArray (\n    [name] =&gt; \u9234\u6728\u82b1\u5b50\n    [email] =&gt; suzuki@example.com\n    [age] =&gt; 30\n    [active] =&gt; false\n)\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-48\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u5546\u54c1\u691c\u7d22\u30d5\u30a3\u30eb\u30bf\u95a2\u6570<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001\u3053\u308c\u307e\u3067\u8aac\u660e\u3057\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u306e\u6982\u5ff5\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u5b9f\u8df5\u7684\u306a\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u5546\u54c1\u4e00\u89a7\u306b\u5bfe\u3057\u3066\u30d5\u30a3\u30eb\u30bf\u3092\u9069\u7528\u3059\u308b\u95a2\u6570\n *\n * @param array $products \u5546\u54c1\u30ea\u30b9\u30c8\n * @param array $filters \u9069\u7528\u3059\u308b\u30d5\u30a3\u30eb\u30bf\n * @param string $sortBy \u30bd\u30fc\u30c8\u57fa\u6e96\n * @param string $sortOrder \u30bd\u30fc\u30c8\u9806\u5e8f\n * @param int $limit \u53d6\u5f97\u4ef6\u6570\u5236\u9650\n * @return array \u30d5\u30a3\u30eb\u30bf\u9069\u7528\u5f8c\u306e\u5546\u54c1\u30ea\u30b9\u30c8\u3068\u7dcf\u4ef6\u6570\n *\/\nfunction filterProducts(\n    array $products,\n    array $filters = [],\n    string $sortBy = 'price',\n    string $sortOrder = 'asc',\n    int $limit = 10\n): array {\n    $filteredProducts = $products;\n    \n    \/\/ \u30ab\u30c6\u30b4\u30ea\u30d5\u30a3\u30eb\u30bf\u306e\u9069\u7528\n    if (isset($filters['category']) &amp;&amp; $filters['category'] !== '') {\n        $filteredProducts = array_filter($filteredProducts, function($product) use ($filters) {\n            return $product['category'] === $filters['category'];\n        });\n    }\n    \n    \/\/ \u4fa1\u683c\u7bc4\u56f2\u30d5\u30a3\u30eb\u30bf\u306e\u9069\u7528\n    if (isset($filters['min_price'])) {\n        $filteredProducts = array_filter($filteredProducts, function($product) use ($filters) {\n            return $product['price'] &gt;= $filters['min_price'];\n        });\n    }\n    \n    if (isset($filters['max_price'])) {\n        $filteredProducts = array_filter($filteredProducts, function($product) use ($filters) {\n            return $product['price'] &lt;= $filters['max_price'];\n        });\n    }\n    \n    \/\/ \u691c\u7d22\u30ad\u30fc\u30ef\u30fc\u30c9\u30d5\u30a3\u30eb\u30bf\u306e\u9069\u7528\n    if (isset($filters['keyword']) &amp;&amp; $filters['keyword'] !== '') {\n        $keyword = strtolower($filters['keyword']);\n        $filteredProducts = array_filter($filteredProducts, function($product) use ($keyword) {\n            return strpos(strtolower($product['name']), $keyword) !== false ||\n                   strpos(strtolower($product['description']), $keyword) !== false;\n        });\n    }\n    \n    \/\/ \u7dcf\u4ef6\u6570\u306e\u4fdd\u5b58\n    $totalCount = count($filteredProducts);\n    \n    \/\/ \u30bd\u30fc\u30c8\u306e\u9069\u7528\n    usort($filteredProducts, function($a, $b) use ($sortBy, $sortOrder) {\n        if ($sortOrder === 'asc') {\n            return $a[$sortBy] &lt;=&gt; $b[$sortBy];\n        } else {\n            return $b[$sortBy] &lt;=&gt; $a[$sortBy];\n        }\n    });\n    \n    \/\/ \u4ef6\u6570\u5236\u9650\u306e\u9069\u7528\n    $filteredProducts = array_slice($filteredProducts, 0, $limit);\n    \n    \/\/ \u7d50\u679c\u3092\u8fd4\u3059\n    return [\n        'products' =&gt; $filteredProducts];\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-49\">\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u3068\u578b\u5ba3\u8a00<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u6a5f\u80fd\u3068\u67d4\u8edf\u6027\u306f\u3001\u305d\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u5f15\u6570\uff09\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u308a\u5927\u304d\u304f\u5411\u4e0a\u3057\u307e\u3059\u3002\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u95a2\u6570\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u3067\u3001\u95a2\u6570\u306f\u3053\u308c\u3089\u3092\u4f7f\u7528\u3057\u3066\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u3068\u3001\u30e2\u30c0\u30f3PHP\u3067\u91cd\u8981\u306a\u578b\u5ba3\u8a00\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-50\">\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u57fa\u672c\u6982\u5ff5<\/h4>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function functionName($parameter1, $parameter2, ...) {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u540d\u524d\u3068\u5e74\u9f62\u3092\u53d7\u3051\u53d6\u308b\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function displayPersonInfo($name, $age) {\n    echo \"$name \u306f $age \u6b73\u3067\u3059\u3002\";\n}\n\ndisplayPersonInfo(\"\u7530\u4e2d\", 25); \/\/ \u51fa\u529b: \u7530\u4e2d \u306f 25 \u6b73\u3067\u3059\u3002\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-51\">\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u300c\u5fc5\u9808\u300d\u3068\u300c\u30aa\u30d7\u30b7\u30e7\u30f3\uff08\u7701\u7565\u53ef\u80fd\uff09\u300d\u306e2\u7a2e\u985e\u306b\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf<\/strong>\u306f\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u6642\u306b\u5fc5\u305a\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function divide($numerator, $denominator) {\n    return $numerator \/ $denominator;\n}\n\necho divide(10, 2); \/\/ \u51fa\u529b: 5\n\/\/ divide(10); \/\/ \u30a8\u30e9\u30fc: Too few arguments\n<\/pre>\n\n\n\n<p><strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf<\/strong>\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6301\u3061\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u6642\u306b\u7701\u7565\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function power($base, $exponent = 2) {\n    return pow($base, $exponent);\n}\n\necho power(4);    \/\/ \u51fa\u529b: 16 ($exponent \u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e2\u304c\u4f7f\u7528\u3055\u308c\u308b)\necho power(2, 3); \/\/ \u51fa\u529b: 8 ($exponent \u306b 3 \u304c\u4f7f\u7528\u3055\u308c\u308b)\n<\/pre>\n\n\n\n<p><strong>\u91cd\u8981<\/strong>: \u30aa\u30d7\u30b7\u30e7\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5f8c\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc: \u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9806\u5e8f\u304c\u6b63\u3057\u304f\u306a\u3044\nfunction incorrectOrder($optional = \"default\", $required) {\n    \/\/ \u51e6\u7406\n}\n\n\/\/ \u6b63\u3057\u3044\u9806\u5e8f\nfunction correctOrder($required, $optional = \"default\") {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-52\">PHP 7\u4ee5\u964d\u306e\u578b\u5ba3\u8a00\u30b7\u30b9\u30c6\u30e0<\/h4>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u3092\u6307\u5b9a\u3059\u308b\u300c\u578b\u5ba3\u8a00\u300d\u304c\u5927\u5e45\u306b\u5f37\u5316\u3055\u308c\u307e\u3057\u305f\u3002\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u6570\u304c\u671f\u5f85\u3059\u308b\u5165\u529b\u306e\u7a2e\u985e\u3092\u660e\u793a\u7684\u306b\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u3001\u591a\u304f\u306e\u30d0\u30b0\u3092\u4e8b\u524d\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u578b\u5ba3\u8a00\u306e\u66f8\u304d\u65b9<\/strong>\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=\"\">function functionName(\u578b $parameter): \u623b\u308a\u5024\u306e\u578b {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u5229\u7528\u53ef\u80fd\u306a\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>PHP\u3067\u5229\u7528\u53ef\u80fd\u306a\u578b\u5ba3\u8a00\u306b\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-54\">PHP 7.0 \u3067\u5c0e\u5165\u3055\u308c\u305f\u578b\uff1a<\/h5>\n\n\n<div id=\"id-823c6371-a443-4929-a438-f6eb77981674\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u578b<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>int<\/code><\/td><td>\u6574\u6570<\/td><td><code>function add(int $a, int $b)<\/code><\/td><\/tr><tr><td><code>float<\/code><\/td><td>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570<\/td><td><code>function divide(float $a, float $b)<\/code><\/td><\/tr><tr><td><code>bool<\/code><\/td><td>\u771f\u507d\u5024<\/td><td><code>function isActive(bool $status)<\/code><\/td><\/tr><tr><td><code>string<\/code><\/td><td>\u6587\u5b57\u5217<\/td><td><code>function greet(string $name)<\/code><\/td><\/tr><tr><td><code>array<\/code><\/td><td>\u914d\u5217<\/td><td><code>function processItems(array $items)<\/code><\/td><\/tr><tr><td><code>callable<\/code><\/td><td>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570<\/td><td><code>function executeTask(callable $task)<\/code><\/td><\/tr><tr><td>\u30af\u30e9\u30b9\/\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d<\/td><td>\u7279\u5b9a\u306e\u30af\u30e9\u30b9\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/td><td><code>function saveUser(User $user)<\/code><\/td><\/tr><tr><td><code>self<\/code><\/td><td>\u73fe\u5728\u306e\u30af\u30e9\u30b9<\/td><td><code>function compare(self $other)<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h5 class=\"wp-block-heading\" id=\"i-55\">PHP 7.1 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u578b\uff1a<\/h5>\n\n\n<div id=\"id-402ce00c-b268-4569-96b8-357067276817\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u578b<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>iterable<\/code><\/td><td>\u53cd\u5fa9\u53ef\u80fd\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td><td><code>function process(iterable $items)<\/code><\/td><\/tr><tr><td><code>void<\/code><\/td><td>\u623b\u308a\u5024\u306a\u3057<\/td><td><code>function log(string $message): void<\/code><\/td><\/tr><tr><td><code>?\u578b<\/code><\/td><td>null\u8a31\u5bb9\uff08nullable\uff09<\/td><td><code>function findUser(int $id): ?User<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h5 class=\"wp-block-heading\" id=\"i-56\">PHP 8.0 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u578b\uff1a<\/h5>\n\n\n<div id=\"id-f062280f-3125-4790-afb9-84bc49bad2d6\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u578b<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>mixed<\/code><\/td><td>\u4efb\u610f\u306e\u578b<\/td><td><code>function process(mixed $data)<\/code><\/td><\/tr><tr><td><code>union types<\/code><\/td><td>\u8907\u6570\u306e\u578b\u306e\u3044\u305a\u308c\u304b<\/td><td><code>function convert(int|float $foo): int|float<\/code><\/td><\/tr><tr><td><code>static<\/code><\/td><td>\u73fe\u5728\u306e\u30af\u30e9\u30b9\u307e\u305f\u306f\u305d\u306e\u5b50\u30af\u30e9\u30b9<\/td><td><code>function create(): static<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h5 class=\"wp-block-heading\" id=\"i-57\">PHP 8.1 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u578b\uff1a<\/h5>\n\n\n<div id=\"id-d0a84bf9-02a7-4214-9c5f-4ad0e767600a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u578b<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>never<\/code><\/td><td>\u95a2\u6570\u304c\u5024\u3092\u8fd4\u3055\u306a\u3044\uff08\u4f8b\u5916\u306e\u30b9\u30ed\u30fc\uff09<\/td><td><code>function redirect(): never<\/code><\/td><\/tr><tr><td><code>intersection types<\/code><\/td><td>\u8907\u6570\u306e\u578b\uff08\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff09\u306e\u3059\u3079\u3066<\/td><td><code>function process(Countable&amp;Traversable $value)<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"i-58\">\u578b\u5ba3\u8a00\u306e\u5b9f\u8df5\u4f8b<\/h4>\n\n\n\n<p>\u30b7\u30f3\u30d7\u30eb\u306a\u4f8b\u304b\u3089\u59cb\u3081\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=\"\">function calculateArea(float $radius): float {\n    return pi() * $radius * $radius;\n}\n\necho calculateArea(5.0); \/\/ \u51fa\u529b: 78.53981633974483\necho calculateArea(\"5\"); \/\/ 78.53981633974483\uff08\u6587\u5b57\u5217\"5\"\u306f\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306b\u5909\u63db\u3055\u308c\u308b\uff09\n<\/pre>\n\n\n\n<p>\u8907\u6570\u306e\u578b\u3092\u4f7f\u7528\u3057\u305f\u8907\u96d1\u306a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u691c\u8a3c\u3057\u3066\u4fdd\u5b58\u3059\u308b\n * \n * @param User $user \u30e6\u30fc\u30b6\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n * @param array $options \u8ffd\u52a0\u30aa\u30d7\u30b7\u30e7\u30f3\n * @return bool|int \u6210\u529f\u3057\u305f\u5834\u5408\u306f\u30e6\u30fc\u30b6\u30fcID\u3001\u5931\u6557\u3057\u305f\u5834\u5408\u306ffalse\n *\/\nfunction saveUserData(User $user, array $options = []): bool|int {\n    \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n    if (!$user-&gt;isValid()) {\n        return false;\n    }\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\n    $userId = $user-&gt;save();\n    \n    \/\/ \u8ffd\u52a0\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u51e6\u7406\n    if (isset($options['sendWelcomeEmail']) &amp;&amp; $options['sendWelcomeEmail']) {\n        sendWelcomeEmail($user-&gt;getEmail());\n    }\n    \n    return $userId;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-59\">\u53b3\u683c\u306a\u578b\u30c1\u30a7\u30c3\u30af\u30e2\u30fc\u30c9<\/h4>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001PHP\u306f\u578b\u5f37\u5236\uff08type coercion\uff09\u3092\u884c\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u6587\u5b57\u5217\u306e \u201c5\u201d \u306f\u95a2\u6570\u304c <code>int<\/code> \u3092\u671f\u5f85\u3059\u308b\u5834\u5408\u3001\u81ea\u52d5\u7684\u306b\u6574\u6570 5 \u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3088\u308a\u53b3\u683c\u306a\u578b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5148\u982d\u306b <code>declare(strict_types=1);<\/code> \u3092\u8ffd\u52a0\u3057\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=\"\">declare(strict_types=1);\n\nfunction sum(int $a, int $b): int {\n    return $a + $b;\n}\n\necho sum(5, 10);  \/\/ \u51fa\u529b: 15\n\/\/ echo sum(\"5\", 10); \/\/ \u30a8\u30e9\u30fc: TypeError: sum(): Argument #1 ($a) must be of type int, string given\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-60\">Nullable\u578b\u306e\u5229\u7528<\/h4>\n\n\n\n<p>PHP 7.1\u4ee5\u964d\u3067\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3084\u623b\u308a\u5024\u304cnull\u3067\u3082\u826f\u3044\u3053\u3068\u3092\u793a\u3059\u65b9\u6cd5\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\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=\"\">function findUserById(?int $id): ?User {\n    if ($id === null) {\n        return null; \/\/ ID\u672a\u6307\u5b9a\u306e\u5834\u5408\u306f\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30b6\u30fc\n    }\n    \n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u3092\u691c\u7d22\n    $user = Database::findUser($id);\n    return $user ?: null;\n}\n\n\/\/ null\u4ee5\u5916\u306eID\u3067\u30e6\u30fc\u30b6\u30fc\u3092\u691c\u7d22\n$user1 = findUserById(123);\n\n\/\/ null\u3067\u3082\u8a31\u5bb9\u3055\u308c\u308b\n$user2 = findUserById(null);\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-61\">\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u578b\u5ba3\u8a00\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u5ba3\u8a00\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u7528\u3059\u308b<\/strong>\uff1a \u578b\u5ba3\u8a00\u306f\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3057\u3001\u30d0\u30b0\u3092\u65e9\u671f\u306b\u767a\u898b\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u53b3\u683c\u30e2\u30fc\u30c9\u3092\u691c\u8a0e\u3059\u308b<\/strong>\uff1a <code>declare(strict_types=1);<\/code> \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u578b\u306e\u5b89\u5168\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u7279\u306b\u30c1\u30fc\u30e0\u3067\u306e\u958b\u767a\u3084API\u306e\u4f5c\u6210\u6642\u306b\u6709\u52b9\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u3067\u4e00\u8cab\u3057\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u4f7f\u7528\u3059\u308b<\/strong>\uff1a \u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u53ef\u80fd\u306a\u9650\u308a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u3067\u4e00\u8cab\u3057\u3066\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u30b3\u30e1\u30f3\u30c8\u3068\u7d44\u307f\u5408\u308f\u305b\u308b<\/strong>\uff1a PHPDoc\u30b3\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u578b\u5ba3\u8a00\u3092\u88dc\u5b8c\u3057\u3001\u3088\u308a\u8a73\u7d30\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\u306b\u57fa\u3065\u3044\u3066\u9069\u5207\u306a\u5272\u5f15\u3092\u8a08\u7b97\u3059\u308b\n *\n * @param int $age \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\n * @param float $price \u5546\u54c1\u306e\u4fa1\u683c\n * @param bool $isVip VIP\u30e6\u30fc\u30b6\u30fc\u304b\u3069\u3046\u304b\n * @return float \u5272\u5f15\u5f8c\u306e\u4fa1\u683c\n *\/\nfunction calculateDiscount(int $age, float $price, bool $isVip = false): float {\n    $discount = 0.0;\n    \n    \/\/ \u5e74\u9f62\u306b\u3088\u308b\u5272\u5f15\n    if ($age &lt; 18) {\n        $discount += 0.1; \/\/ 10%\u5272\u5f15\n    } elseif ($age &gt;= 65) {\n        $discount += 0.15; \/\/ 15%\u5272\u5f15\n    }\n    \n    \/\/ VIP\u30e6\u30fc\u30b6\u30fc\u306f\u8ffd\u52a0\u5272\u5f15\n    if ($isVip) {\n        $discount += 0.05; \/\/ \u3055\u3089\u306b5%\u5272\u5f15\n    }\n    \n    \/\/ \u7dcf\u5272\u5f15\u3092\u9069\u7528\uff08\u6700\u592730%\u307e\u3067\uff09\n    $finalDiscount = min($discount, 0.3);\n    return $price * (1 - $finalDiscount);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$standardPrice = 10000;\n\n\/\/ 16\u6b73\u306e\u9867\u5ba2\u306e\u5834\u5408\uff0810%\u5272\u5f15\uff09\n$priceFor16YearOld = calculateDiscount(16, $standardPrice);\necho \"16\u6b73\u306e\u9867\u5ba2\u306e\u4fa1\u683c: {$priceFor16YearOld}\u5186\\n\"; \/\/ 9000\u5186\n\n\/\/ 70\u6b73\u306eVIP\u9867\u5ba2\u306e\u5834\u5408\uff0815% + 5% = 20%\u5272\u5f15\uff09\n$priceFor70YearOldVIP = calculateDiscount(70, $standardPrice, true);\necho \"70\u6b73\u306eVIP\u9867\u5ba2\u306e\u4fa1\u683c: {$priceFor70YearOldVIP}\u5186\\n\"; \/\/ 8000\u5186\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-62\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1aWeb API\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u691c\u8a3c<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001Web API\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u691c\u8a3c\u3059\u308b\u5b9f\u7528\u7684\u306a\u4f8b\u3067\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=\"\">&lt;?php\ndeclare(strict_types=1);\n\n\/**\n * API\u30ea\u30af\u30a8\u30b9\u30c8\u304b\u3089\u5546\u54c1\u691c\u7d22\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u3001\u6a19\u6e96\u5316\u3059\u308b\n *\n * @param array $requestData \u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\n * @return array \u691c\u8a3c\u6e08\u307f\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\n * @throws InvalidArgumentException \u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u7121\u52b9\u306a\u5834\u5408\n *\/\nfunction validateProductSearchParams(array $requestData): array {\n    $validatedParams = [];\n    \n    \/\/ \u30ad\u30fc\u30ef\u30fc\u30c9\u691c\u7d22\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u6587\u5b57\u5217\u3001\u6700\u5c0f3\u6587\u5b57\uff09\n    if (isset($requestData['keyword'])) {\n        if (!is_string($requestData['keyword'])) {\n            throw new InvalidArgumentException('\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u6587\u5b57\u5217\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $keyword = trim($requestData['keyword']);\n        if (strlen($keyword) &lt; 3) {\n            throw new InvalidArgumentException('\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u6700\u4f4e3\u6587\u5b57\u5fc5\u8981\u3067\u3059');\n        }\n        \n        $validatedParams['keyword'] = $keyword;\n    }\n    \n    \/\/ \u30ab\u30c6\u30b4\u30ea\u30fcID\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u6574\u6570\u3001\u6b63\u306e\u5024\uff09\n    if (isset($requestData['category_id'])) {\n        $categoryId = filter_var($requestData['category_id'], FILTER_VALIDATE_INT);\n        if ($categoryId === false || $categoryId &lt;= 0) {\n            throw new InvalidArgumentException('\u30ab\u30c6\u30b4\u30eaID\u306f\u6b63\u306e\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $validatedParams['category_id'] = $categoryId;\n    }\n    \n    \/\/ \u4fa1\u683c\u7bc4\u56f2\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u6570\u5024\u30010\u4ee5\u4e0a\uff09\n    if (isset($requestData['min_price'])) {\n        $minPrice = filter_var($requestData['min_price'], FILTER_VALIDATE_FLOAT);\n        if ($minPrice === false || $minPrice &lt; 0) {\n            throw new InvalidArgumentException('\u6700\u5c0f\u4fa1\u683c\u306f0\u4ee5\u4e0a\u306e\u6570\u5024\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $validatedParams['min_price'] = $minPrice;\n    }\n    \n    if (isset($requestData['max_price'])) {\n        $maxPrice = filter_var($requestData['max_price'], FILTER_VALIDATE_FLOAT);\n        if ($maxPrice === false || $maxPrice &lt; 0) {\n            throw new InvalidArgumentException('\u6700\u5927\u4fa1\u683c\u306f0\u4ee5\u4e0a\u306e\u6570\u5024\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $validatedParams['max_price'] = $maxPrice;\n    }\n    \n    \/\/ \u6700\u5c0f\u4fa1\u683c\u3068\u6700\u5927\u4fa1\u683c\u306e\u6574\u5408\u6027\u30c1\u30a7\u30c3\u30af\n    if (isset($validatedParams['min_price']) &amp;&amp; isset($validatedParams['max_price'])) {\n        if ($validatedParams['min_price'] &gt; $validatedParams['max_price']) {\n            throw new InvalidArgumentException('\u6700\u5c0f\u4fa1\u683c\u306f\u6700\u5927\u4fa1\u683c\u4ee5\u4e0b\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n    }\n    \n    \/\/ \u30bd\u30fc\u30c8\u9806\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u5217\u6319\u578b\uff09\n    $validSortOptions = ['price_asc', 'price_desc', 'name_asc', 'name_desc', 'newest'];\n    if (isset($requestData['sort'])) {\n        if (!is_string($requestData['sort']) || !in_array($requestData['sort'], $validSortOptions)) {\n            throw new InvalidArgumentException('\u7121\u52b9\u306a\u30bd\u30fc\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3059');\n        }\n        \n        $validatedParams['sort'] = $requestData['sort'];\n    } else {\n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30bd\u30fc\u30c8\u9806\n        $validatedParams['sort'] = 'newest';\n    }\n    \n    \/\/ \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u6574\u6570\u3001\u6b63\u306e\u5024\uff09\n    $validatedParams['page'] = 1; \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n    if (isset($requestData['page'])) {\n        $page = filter_var($requestData['page'], FILTER_VALIDATE_INT);\n        if ($page === false || $page &lt;= 0) {\n            throw new InvalidArgumentException('\u30da\u30fc\u30b8\u756a\u53f7\u306f\u6b63\u306e\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $validatedParams['page'] = $page;\n    }\n    \n    \/\/ 1\u30da\u30fc\u30b8\u3042\u305f\u308a\u306e\u4ef6\u6570\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\u3001\u6574\u6570\u3001\u7bc4\u56f2\u5185\uff09\n    $validatedParams['per_page'] = 20; \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n    if (isset($requestData['per_page'])) {\n        $perPage = filter_var($requestData['per_page'], FILTER_VALIDATE_INT);\n        if ($perPage === false || $perPage &lt; 1 || $perPage &gt; 100) {\n            throw new InvalidArgumentException('\u8868\u793a\u4ef6\u6570\u306f1\u301c100\u306e\u9593\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n        }\n        \n        $validatedParams['per_page'] = $perPage;\n    }\n    \n    return $validatedParams;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    $requestData = [\n        'keyword' =&gt; '\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3',\n        'category_id' =&gt; '5',  \/\/ \u6587\u5b57\u5217\u3068\u3057\u3066\u9001\u4fe1\u3055\u308c\u305fID\n        'min_price' =&gt; 10000,\n        'max_price' =&gt; 50000,\n        'sort' =&gt; 'price_asc',\n        'page' =&gt; 2\n    ];\n    \n    $validParams = validateProductSearchParams($requestData);\n    print_r($validParams);\n    \n    \/\/ \u7121\u52b9\u306a\u30c7\u30fc\u30bf\n    $invalidRequest = [\n        'keyword' =&gt; 'a',  \/\/ 3\u6587\u5b57\u672a\u6e80\n        'min_price' =&gt; 30000,\n        'max_price' =&gt; 20000  \/\/ min_price\u3088\u308a\u5c0f\u3055\u3044\n    ];\n    \n    $validParams = validateProductSearchParams($invalidRequest);\n} catch (InvalidArgumentException $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001Web API\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u691c\u8a3c\u3057\u3001\u578b\u3092\u9069\u5207\u306b\u5909\u63db\u3057\u3066\u6a19\u6e96\u5316\u3059\u308b\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u578b\u5ba3\u8a00\u3068\u4f8b\u5916\u51e6\u7406\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u4e88\u6e2c\u53ef\u80fd\u306aAPI\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-63\">\u53ef\u5909\u9577\u5f15\u6570\u30ea\u30b9\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP 5.6\u4ee5\u964d\u3067\u306f\u3001\u95a2\u6570\u304c\u4efb\u610f\u306e\u6570\u306e\u5f15\u6570\u3092\u53d7\u3051\u53d6\u308c\u308b\u300c\u53ef\u5909\u9577\u5f15\u6570\uff08variadic parameters\uff09\u300d\u3068\u3044\u3046\u5f37\u529b\u306a\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u3046\u3068\u3001\u5f15\u6570\u306e\u6570\u304c\u4e8b\u524d\u306b\u5206\u304b\u3089\u306a\u3044\u5834\u5408\u3084\u3001\u540c\u3058\u3088\u3046\u306a\u64cd\u4f5c\u3092\u4efb\u610f\u306e\u6570\u306e\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u884c\u3044\u305f\u3044\u5834\u5408\u306b\u3001\u3088\u308a\u67d4\u8edf\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-64\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u306f<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u3068\u306f\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u6642\u306b\u4efb\u610f\u306e\u6570\u306e\u5f15\u6570\u3092\u6e21\u305b\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u5f93\u6765\u306f\u3001\u672a\u77e5\u306e\u6570\u306e\u5f15\u6570\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306b <code>func_get_args()<\/code> \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001PHP 5.6\u304b\u3089\u306f\u3088\u308a\u660e\u793a\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u69cb\u6587\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-65\">\u53ef\u5909\u9577\u5f15\u6570\u306e\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u300c\u2026\uff083\u3064\u306e\u30c9\u30c3\u30c8\uff09\u300d\u3092\u4f7f\u3063\u3066\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\uff08Spread Operator\uff09\u3068\u3082\u547c\u3070\u308c\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=\"\">function functionName(...$parameters) {\n    \/\/ $parameters\u306f\u914d\u5217\u3068\u3057\u3066\u6271\u308f\u308c\u308b\n}\n<\/pre>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4efb\u610f\u306e\u6570\u306e\u6570\u5024\u3092\u53d7\u3051\u53d6\u3063\u3066\u5408\u8a08\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function sum(...$numbers) {\n    return array_sum($numbers);\n}\n\necho sum(1, 2);           \/\/ \u51fa\u529b: 3\necho sum(1, 2, 3, 4, 5);  \/\/ \u51fa\u529b: 15\necho sum(10);             \/\/ \u51fa\u529b: 10\necho sum();               \/\/ \u51fa\u529b: 0 (\u7a7a\u306e\u914d\u5217\u306e\u5408\u8a08)\n<\/pre>\n\n\n\n<p>\u95a2\u6570\u5185\u3067\u306f\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u914d\u5217\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u914d\u5217\u306e\u64cd\u4f5c\u306b\u4f7f\u7528\u3059\u308bPHP\u306e\u95a2\u6570\u3084\u69cb\u6587\u3092\u5168\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-66\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306b\u3082\u578b\u5ba3\u8a00\u3092\u9069\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6e21\u3055\u308c\u308b\u5168\u3066\u306e\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u305f\u578b\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function sumIntegers(int ...$numbers): int {\n    return array_sum($numbers);\n}\n\necho sumIntegers(1, 2, 3);  \/\/ \u51fa\u529b: 6\n\/\/ echo sumIntegers(1, 2, \"3\");  \/\/ \u30a8\u30e9\u30fc: TypeError (strict_types\u304c\u6709\u52b9\u306a\u5834\u5408)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-67\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u901a\u5e38\u306e\u5f15\u6570\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u3001\u901a\u5e38\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u4e00\u7dd2\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u5e38\u306b\u6700\u5f8c\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\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=\"\">function buildQuery(string $baseUrl, array $filters, string ...$segments): string {\n    $url = $baseUrl;\n    \n    \/\/ \u30d1\u30b9\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0\n    if (count($segments) &gt; 0) {\n        $url .= '\/' . implode('\/', $segments);\n    }\n    \n    \/\/ \u30af\u30a8\u30ea\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\n    if (count($filters) &gt; 0) {\n        $queryString = http_build_query($filters);\n        $url .= '?' . $queryString;\n    }\n    \n    return $url;\n}\n\n$url = buildQuery(\n    'https:\/\/api.example.com',\n    ['status' =&gt; 'active', 'sort' =&gt; 'created_at'],\n    'users',\n    'premium'\n);\n\necho $url;\n\/\/ \u51fa\u529b: https:\/\/api.example.com\/users\/premium?status=active&amp;sort=created_at\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6700\u521d\u306e\u5f15\u6570\u306f\u30d9\u30fc\u30b9URL\u30012\u756a\u76ee\u306e\u5f15\u6570\u306f\u30d5\u30a3\u30eb\u30bf\u30fc\u914d\u5217\u3001\u305d\u3057\u3066\u6b8b\u308a\u306e\u5f15\u6570\u306fURL\u306e\u30d1\u30b9\u30bb\u30b0\u30e1\u30f3\u30c8\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-68\">\u914d\u5217\u306e\u30a2\u30f3\u30d1\u30c3\u30af\uff08Unpacking\uff09<\/h4>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u3001\u95a2\u6570\u306e\u5b9a\u7fa9\u3060\u3051\u3067\u306a\u304f\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u6642\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u30a2\u30f3\u30d1\u30c3\u30af\uff08unpacking\uff09\u300d\u3068\u547c\u3070\u308c\u3001\u914d\u5217\u3084\u30a4\u30c6\u30e9\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8981\u7d20\u3092\u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u95a2\u6570\u306b\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function addThreeNumbers($a, $b, $c) {\n    return $a + $b + $c;\n}\n\n$numbers = [1, 2, 3];\n\n\/\/ \u914d\u5217\u3092\u30a2\u30f3\u30d1\u30c3\u30af\u3057\u3066\u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\necho addThreeNumbers(...$numbers);  \/\/ \u51fa\u529b: 6\n\n\/\/ \u4e00\u90e8\u306e\u5f15\u6570\u3092\u76f4\u63a5\u6307\u5b9a\u3057\u3001\u6b8b\u308a\u3092\u30a2\u30f3\u30d1\u30c3\u30af\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\n$partialNumbers = [2, 3];\necho addThreeNumbers(1, ...$partialNumbers);  \/\/ \u51fa\u529b: 6\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6a5f\u80fd\u306f\u3001\u914d\u5217\u306e\u5185\u5bb9\u3092\u95a2\u6570\u306e\u5f15\u6570\u30ea\u30b9\u30c8\u306b\u5c55\u958b\u3057\u305f\u3044\u5834\u5408\u306b\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-69\">PHP 8.1\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>PHP 8.1\u4ee5\u964d\u3067\u306f\u3001\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u53ef\u5909\u9577\u5f15\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\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=\"\">function configureApp(string $appName, ...$settings) {\n    echo \"\u30a2\u30d7\u30ea\u540d: $appName\\n\";\n    echo \"\u8a2d\u5b9a:\\n\";\n    foreach ($settings as $key =&gt; $value) {\n        echo \"  $key: \" . (is_bool($value) ? ($value ? 'true' : 'false') : $value) . \"\\n\";\n    }\n}\n\nconfigureApp(\n    appName: \"MyApp\",\n    debug: true,\n    environment: \"production\",\n    maxConnections: 100\n);\n\n\/* \u51fa\u529b:\n\u30a2\u30d7\u30ea\u540d: MyApp\n\u8a2d\u5b9a:\n  debug: true\n  environment: production\n  maxConnections: 100\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-70\">\u53ef\u5909\u9577\u5f15\u6570\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u304c\u7279\u306b\u5f79\u7acb\u3064\u4e00\u822c\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-71\">1. \u30ed\u30ae\u30f3\u30b0\u95a2\u6570<\/h5>\n\n\n\n<p>\u69d8\u3005\u306a\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u542b\u3080\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\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=\"\">function log(string $level, string $message, ...$context) {\n    $timestamp = date('Y-m-d H:i:s');\n    \n    \/\/ \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u304c\u3042\u308c\u3070\u3001JSON\u306b\u5909\u63db\u3057\u3066\u8ffd\u52a0\n    $contextJson = empty($context) ? \"\" : \" \" . json_encode($context);\n    \n    $logMessage = \"[$timestamp] [$level] $message$contextJson\";\n    file_put_contents('app.log', $logMessage . PHP_EOL, FILE_APPEND);\n}<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-72\">2. \u6570\u5b66\u95a2\u6570<\/h5>\n\n\n\n<p>\u5e73\u5747\u3001\u6700\u5927\u5024\u3001\u6700\u5c0f\u5024\u306a\u3069\u3001\u4efb\u610f\u306e\u6570\u306e\u6570\u5024\u3092\u51e6\u7406\u3059\u308b\u95a2\u6570\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function average(...$numbers): float {\n    if (empty($numbers)) {\n        throw new InvalidArgumentException(\"\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u6570\u5024\u304c\u5fc5\u8981\u3067\u3059\");\n    }\n    return array_sum($numbers) \/ count($numbers);\n}\n\nfunction maximum(...$numbers) {\n    if (empty($numbers)) {\n        throw new InvalidArgumentException(\"\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u6570\u5024\u304c\u5fc5\u8981\u3067\u3059\");\n    }\n    return max($numbers);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\necho \"\u5e73\u5747: \" . average(4, 6, 9, 3, 2) . \"\\n\";  \/\/ \u51fa\u529b: \u5e73\u5747: 4.8\necho \"\u6700\u5927\u5024: \" . maximum(4, 6, 9, 3, 2) . \"\\n\";  \/\/ \u51fa\u529b: \u6700\u5927\u5024: 9\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-73\">3. \u30a4\u30d9\u30f3\u30c8\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u30e3\u30fc<\/h5>\n\n\n\n<p>\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u30fc\u306b\u8ffd\u52a0\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3059\u5834\u5408\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 EventDispatcher {\n    private $listeners = [];\n    \n    public function addListener(string $eventName, callable $listener): void {\n        if (!isset($this-&gt;listeners[$eventName])) {\n            $this-&gt;listeners[$eventName] = [];\n        }\n        $this-&gt;listeners[$eventName][] = $listener;\n    }\n    \n    public function dispatch(string $eventName, ...$args): void {\n        if (!isset($this-&gt;listeners[$eventName])) {\n            return;\n        }\n        \n        foreach ($this-&gt;listeners[$eventName] as $listener) {\n            call_user_func_array($listener, $args);\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$dispatcher = new EventDispatcher();\n\n\/\/ \u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\u3092\u8ffd\u52a0\n$dispatcher-&gt;addListener('user.registered', function($userId, $email) {\n    echo \"\u65b0\u898f\u30e6\u30fc\u30b6\u30fc\u767b\u9332: ID=$userId, Email=$email\\n\";\n});\n\n$dispatcher-&gt;addListener('order.completed', function($orderId, $amount, $products) {\n    echo \"\u6ce8\u6587\u5b8c\u4e86: ID=$orderId, \u91d1\u984d=$amount\u5186, \u5546\u54c1\u6570=\" . count($products) . \"\\n\";\n});\n\n\/\/ \u30a4\u30d9\u30f3\u30c8\u3092\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\uff08\u7570\u306a\u308b\u6570\u306e\u5f15\u6570\u3092\u6e21\u3059\uff09\n$dispatcher-&gt;dispatch('user.registered', 12345, 'user@example.com');\n$dispatcher-&gt;dispatch('order.completed', 'ORD-789', 15800, ['\u5546\u54c1A', '\u5546\u54c1B', '\u5546\u54c1C']);\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30a4\u30d9\u30f3\u30c8\u540d\u3068\u4efb\u610f\u306e\u6570\u306e\u8ffd\u52a0\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308a\u3001\u767b\u9332\u3055\u308c\u305f\u30ea\u30b9\u30ca\u30fc\u306b\u305d\u308c\u3089\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6e21\u3059\u30a4\u30d9\u30f3\u30c8\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u30e3\u30fc\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-74\">4. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u30fc<\/h5>\n\n\n\n<p>SQL\u306eWHERE\u53e5\u306a\u3069\u306b\u8907\u6570\u306e\u6761\u4ef6\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\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 QueryBuilder {\n    private $table;\n    private $conditions = [];\n    \n    public function __construct(string $table) {\n        $this-&gt;table = $table;\n    }\n    \n    public function where(string $column, string $operator, $value): self {\n        $this-&gt;conditions[] = [$column, $operator, $value];\n        return $this;\n    }\n    \n    public function whereIn(string $column, ...$values): self {\n        $placeholders = implode(',', array_fill(0, count($values), '?'));\n        $this-&gt;conditions[] = [\"$column IN ($placeholders)\", $values];\n        return $this;\n    }\n    \n    public function build(): array {\n        $sql = \"SELECT * FROM \" . $this-&gt;table;\n        $params = [];\n        \n        if (!empty($this-&gt;conditions)) {\n            $sql .= \" WHERE \";\n            $whereClauses = [];\n            \n            foreach ($this-&gt;conditions as $condition) {\n                if (is_array($condition[1])) {\n                    \/\/ whereIn\u7528\u306e\u51e6\u7406\n                    $whereClauses[] = $condition[0];\n                    $params = array_merge($params, $condition[1]);\n                } else {\n                    \/\/ where\u7528\u306e\u51e6\u7406\n                    $whereClauses[] = \"{$condition[0]} {$condition[1]} ?\";\n                    $params[] = $condition[2];\n                }\n            }\n            \n            $sql .= implode(' AND ', $whereClauses);\n        }\n        \n        return [$sql, $params];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$query = new QueryBuilder('users');\n$query-&gt;where('status', '=', 'active')\n      -&gt;where('age', '&gt;', 18)\n      -&gt;whereIn('role', 'admin', 'editor', 'moderator');\n\n[$sql, $params] = $query-&gt;build();\necho \"SQL: $sql\\n\";\necho \"\u30d1\u30e9\u30e1\u30fc\u30bf: \" . implode(', ', $params) . \"\\n\";\n\n\/* \u51fa\u529b:\nSQL: SELECT * FROM users WHERE status = ? AND age &gt; ? AND role IN (?,?,?)\n\u30d1\u30e9\u30e1\u30fc\u30bf: active, 18, admin, editor, moderator\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-75\">\u53ef\u5909\u9577\u5f15\u6570\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u5909\u9577\u5f15\u6570\u306f\u5e38\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8\u306e\u6700\u5f8c\u306b\u914d\u7f6e\u3059\u308b<\/strong>\uff1a \u6587\u6cd5\u4e0a\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u5e38\u306b\u6700\u5f8c\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/li>\n\n\n\n<li><strong>\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3057\u3066\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b<\/strong>\uff1a \u53ef\u80fd\u306a\u9650\u308a\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3057\u3066\u3001\u610f\u56f3\u3057\u306a\u3044\u578b\u306e\u5f15\u6570\u304c\u6e21\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u304e\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5f15\u6570\u304c\u6e21\u3055\u308c\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\u3092\u8003\u616e\u3059\u308b<\/strong>\uff1a \u53ef\u5909\u9577\u5f15\u6570\u306b\u306f\u3001\u4f55\u3082\u6e21\u3055\u308c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001\u7a7a\u306e\u914d\u5217\u306b\u306a\u308a\u307e\u3059\u3002<br><code>function process(...$items) {<\/code><br>    <code>if (empty($items)) {<\/code><br>        <code>return \"\u30a2\u30a4\u30c6\u30e0\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\";<\/code><br>    <code>}<\/code><br>    <code>\/\/ \u51e6\u7406\u7d9a\u884c<\/code><br><code>}<\/code><\/li>\n\n\n\n<li><strong>\u591a\u3059\u304e\u308b\u5f15\u6570\u306b\u6ce8\u610f\u3059\u308b<\/strong>\uff1a \u975e\u5e38\u306b\u591a\u304f\u306e\u5f15\u6570\u3092\u53d7\u3051\u53d6\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u8003\u616e\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5236\u9650\u3092\u8a2d\u3051\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<br><code>function processLimitedItems(...$items) {<\/code><br>    <code>if (count($items) &gt; 100) {<\/code><br>        <code>throw new Exception(\"\u4e00\u5ea6\u306b\u51e6\u7406\u3067\u304d\u308b\u30a2\u30a4\u30c6\u30e0\u306f100\u500b\u307e\u3067\u3067\u3059\");<\/code><br>    <code>}<\/code><br>    <code>\/\/ \u51e6\u7406\u7d9a\u884c<\/code><br><code>}<\/code><\/li>\n\n\n\n<li><strong>\u547d\u540d\u4ed8\u304d\u5f15\u6570\u3068\u306e\u4f75\u7528\u306b\u6ce8\u610f\u3059\u308b<\/strong>\uff1a PHP 8.0\u4ee5\u964d\u3067\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u4e00\u7dd2\u306b\u4f7f\u3046\u5834\u5408\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u4f4d\u7f6e\u5f15\u6570\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-76\">\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u3001\u5f15\u6570\u306e\u6570\u304c\u4e8b\u524d\u306b\u5206\u304b\u3089\u306a\u3044\u5834\u5408\u3084\u3001\u540c\u3058\u51e6\u7406\u3092\u4efb\u610f\u306e\u6570\u306e\u30c7\u30fc\u30bf\u306b\u9069\u7528\u3057\u305f\u3044\u5834\u5408\u306b\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002\u4e3b\u306a\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u304c\u3088\u308a\u30af\u30ea\u30fc\u30f3\u3067\u8aad\u307f\u3084\u3059\u304f\u306a\u308b<\/li>\n\n\n\n<li>\u95a2\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u3088\u308a\u67d4\u8edf\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u5f15\u6570\u306e\u914d\u5217\u3092\u624b\u52d5\u3067\u4f5c\u6210\u30fb\u7ba1\u7406\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308b<\/li>\n\n\n\n<li>\u578b\u5ba3\u8a00\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u578b\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3067\u304d\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u3001\u30ed\u30ae\u30f3\u30b0\u3001\u6570\u5b66\u95a2\u6570\u3001\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u3001\u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u30fc\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u6d3b\u7528\u3067\u304d\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3067\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\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=\"\">\u4f8b\u3048\u3070\u3001\u4efb\u610f\u306e\u6570\u306e\u6570\u5024\u3092\u53d7\u3051\u53d6\u3063\u3066\u5408\u8a08\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\uff1a\n\n```php\nfunction sum(...$numbers) {\n    return array_sum($numbers);\n}\n\necho sum(1, 2);           \/\/ \u51fa\u529b: 3\necho sum(1, 2, 3, 4, 5);  \/\/ \u51fa\u529b: 15\necho sum(10);             \/\/ \u51fa\u529b: 10\necho sum();               \/\/ \u51fa\u529b: 0 (\u7a7a\u306e\u914d\u5217\u306e\u5408\u8a08)\n<\/pre>\n\n\n\n<p>\u95a2\u6570\u5185\u3067\u306f\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u914d\u5217\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u914d\u5217\u306e\u64cd\u4f5c\u306b\u4f7f\u7528\u3059\u308bPHP\u306e\u95a2\u6570\u3084\u69cb\u6587\u3092\u5168\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-77\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306b\u3082\u578b\u5ba3\u8a00\u3092\u9069\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6e21\u3055\u308c\u308b\u5168\u3066\u306e\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u305f\u578b\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function sumIntegers(int ...$numbers): int {\n    return array_sum($numbers);\n}\n\necho sumIntegers(1, 2, 3);  \/\/ \u51fa\u529b: 6\n\/\/ echo sumIntegers(1, 2, \"3\");  \/\/ \u30a8\u30e9\u30fc: TypeError (strict_types\u304c\u6709\u52b9\u306a\u5834\u5408)\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-78\">\u53ef\u5909\u9577\u5f15\u6570\u3068\u901a\u5e38\u306e\u5f15\u6570\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>\u53ef\u5909\u9577\u5f15\u6570\u306f\u3001\u901a\u5e38\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u4e00\u7dd2\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u53ef\u5909\u9577\u5f15\u6570\u306f\u5e38\u306b\u6700\u5f8c\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\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=\"\">function buildQuery(string $baseUrl, array $filters, string ...$segments): string {\n    $url = $baseUrl;\n    \n    \/\/ \u30d1\u30b9\u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u8ffd\u52a0\n    if (count($segments) &gt; 0) {\n        $url .= '\/' . implode('\/', $segments);\n    }\n    \n    \/\/ \u30af\u30a8\u30ea\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\n    if (count($filters) &gt; 0) {\n        $queryString = http_build_query($filters);\n        $url .= '?' . $queryString;\n    }\n    \n    return $url;\n}\n\n$url = buildQuery(\n    'https:\/\/api.example.com',\n    ['status' =&gt; 'active', 'sort' =&gt; 'created_at'],\n    'users',\n    'premium'\n);\n\necho $url;\n\/\/ \u51fa\u529b: https:\/\/api.example.com\/users\/premium?status=active&amp;sort=created_at\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6700\u521d\u306e\u5f15\u6570\u306f\u30d9\u30fc\u30b9URL\u30012\u756a\u76ee\u306e\u5f15\u6570\u306f\u30d5\u30a3\u30eb\u30bf\u30fc\u914d\u5217\u3001\u305d\u3057\u3066\u6b8b\u308a\u306e\u5f15\u6570\u306fURL\u306e\u30d1\u30b9\u30bb\u30b0\u30e1\u30f3\u30c8\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-79\">\u914d\u5217\u306e\u30a2\u30f3\u30d1\u30c3\u30af\uff08Unpacking\uff09<\/h4>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u6f14\u7b97\u5b50\u306f\u3001\u95a2\u6570\u306e\u5b9a\u7fa9\u3060\u3051\u3067\u306a\u304f\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u6642\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u30a2\u30f3\u30d1\u30c3\u30af\uff08unpacking\uff09\u300d\u3068\u547c\u3070\u308c\u3001\u914d\u5217\u3084\u30a4\u30c6\u30e9\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8981\u7d20\u3092\u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u95a2\u6570\u306b\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function addThreeNumbers($a, $b, $c) {\n    return $a + $b + $c;\n}\n\n$numbers = [1, 2, 3];\n\n\/\/ \u914d\u5217\u3092\u30a2\u30f3\u30d1\u30c3\u30af\u3057\u3066\u500b\u5225\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\necho addThreeNumbers(...$numbers);  \/\/ \u51fa\u529b: 6\n\n\/\/ \u4e00\u90e8\u306e\u5f15\u6570\u3092\u76f4\u63a5\u6307\u5b9a\u3057\u3001\u6b8b\u308a\u3092\u30a2\u30f3\u30d1\u30c3\u30af\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\n$partialNumbers = [2, 3];\necho addThreeNumbers(1, ...$partialNumbers);  \/\/ \u51fa\u529b: 6\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6a5f\u80fd\u306f\u3001\u914d\u5217\u306e\u5185\u5bb9\u3092\u95a2\u6570\u306e\u5f15\u6570\u30ea\u30b9\u30c8\u306b\u5c55\u958b\u3057\u305f\u3044\u5834\u5408\u306b\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-80\">PHP 8.1\u306e\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>PHP 8.1\u4ee5\u964d\u3067\u306f\u3001\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u53ef\u5909\u9577\u5f15\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\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=\"\">function configureApp(string $appName, ...$settings) {\n    echo \"\u30a2\u30d7\u30ea\u540d: $appName\\n\";\n    echo \"\u8a2d\u5b9a:\\n\";\n    foreach ($settings as $key =&gt; $value) {\n        echo \"  $key: \" . (is_bool($value) ? ($value ? 'true' : 'false') : $value) . \"\\n\";\n    }\n}\n\nconfigureApp(\n    appName: \"MyApp\",\n    debug: true,\n    environment: \"production\",\n    maxConnections: 100\n);\n\n\/* \u51fa\u529b:\n\u30a2\u30d7\u30ea\u540d: MyApp\n\u8a2d\u5b9a:\n  debug: true\n  environment: production\n  maxConnections: 100\n*\/\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-81\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u3068\u8907\u6570\u306e\u623b\u308a\u5024\u306e\u6271\u3044\u65b9<\/h3>\n\n\n\n<p>\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u51fa\u529b\u3092\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u306f\u3001\u5805\u7262\u306aPHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u5074\u9762\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u306e\u4f7f\u3044\u65b9\u3068\u3001\u95a2\u6570\u304b\u3089\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u69d8\u3005\u306a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-82\">\u623b\u308a\u5024\u306e\u57fa\u672c<\/h4>\n\n\n\n<p>\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u7d50\u679c\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u306b\u306f\u3001<code>return<\/code>\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function add($a, $b) {\n    return $a + $b;\n}\n\n$result = add(5, 3);\necho $result; \/\/ \u51fa\u529b: 8\n<\/pre>\n\n\n\n<p><code>return<\/code>\u6587\u306f\u3001\u95a2\u6570\u306e\u5b9f\u884c\u3092\u5373\u5ea7\u306b\u7d42\u4e86\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u5024\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3057\u307e\u3059\u3002<code>return<\/code>\u3092\u7701\u7565\u3057\u305f\u5834\u5408\u3001\u95a2\u6570\u306f\u6697\u9ed9\u7684\u306b<code>null<\/code>\u3092\u8fd4\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function doSomething() {\n    \/\/ return\u6587\u304c\u306a\u3044\n}\n\n$result = doSomething();\nvar_dump($result); \/\/ \u51fa\u529b: NULL\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-83\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h4>\n\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u3001\u578b\u306e\u5b89\u5168\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\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=\"\">function functionName(\u30d1\u30e9\u30e1\u30fc\u30bf): \u623b\u308a\u5024\u306e\u578b {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\n    return \u5024;\n}\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-84\">\u57fa\u672c\u7684\u306a\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h5>\n\n\n\n<p>PHP 7.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u57fa\u672c\u7684\u306a\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u306b\u306f\u6b21\u306e\u3082\u306e\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=\"\">\/\/ \u30b9\u30ab\u30e9\u30fc\u578b\nfunction addIntegers(int $a, int $b): int {\n    return $a + $b;\n}\n\nfunction getPI(): float {\n    return 3.14159265359;\n}\n\nfunction isActive(int $userId): bool {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u51e6\u7406\n    return true; \/\/ or false\n}\n\nfunction getName(int $userId): string {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u540d\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\n    return \"\u7530\u4e2d\u592a\u90ce\";\n}\n\n\/\/ \u914d\u5217\nfunction getNumbers(): array {\n    return [1, 2, 3, 4, 5];\n}\n\n\/\/ \u30af\u30e9\u30b9\u3084\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\nfunction createUser(string $name): User {\n    $user = new User();\n    $user-&gt;setName($name);\n    return $user;\n}\n\nfunction getRepository(): UserRepositoryInterface {\n    return new UserRepository();\n}\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-85\">PHP 7.1\u3067\u8ffd\u52a0\u3055\u308c\u305f\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h5>\n\n\n\n<p>PHP 7.1\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u8ffd\u52a0\u306e\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<p><strong>void\u578b<\/strong>\uff1a\u95a2\u6570\u304c\u5024\u3092\u8fd4\u3055\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function logMessage(string $message): void {\n    \/\/ \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ed\u30b0\u306b\u8a18\u9332\n    file_put_contents('app.log', date('Y-m-d H:i:s') . ': ' . $message . PHP_EOL, FILE_APPEND);\n    \/\/ return\u6587\u3067\u5024\u3092\u8fd4\u305d\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\n    \/\/ return \"\u5b8c\u4e86\"; \/\/ \u30a8\u30e9\u30fc: A void function must not return a value\n}\n<\/pre>\n\n\n\n<p><strong>nullable\u578b\uff08?\u578b\uff09<\/strong>\uff1a\u5024\u307e\u305f\u306fnull\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function findUser(int $id): ?User {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u691c\u7d22\n    $user = \/* \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u691c\u7d22\u51e6\u7406 *\/;\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u3089\u306a\u3051\u308c\u3070null\u3092\u8fd4\u3059\n    if (!$user) {\n        return null;\n    }\n    \n    return $user;\n}\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-86\">PHP 8.0\u3067\u8ffd\u52a0\u3055\u308c\u305f\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h5>\n\n\n\n<p>PHP 8.0\u3067\u306f\u3001\u578b\u30b7\u30b9\u30c6\u30e0\u304c\u3055\u3089\u306b\u62e1\u5f35\u3055\u308c\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<p><strong>\u5171\u7528\u578b\uff08Union Types\uff09<\/strong>\uff1a\u8907\u6570\u306e\u578b\u306e\u3044\u305a\u308c\u304b\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getConfigValue(string $key): string|int|bool|null {\n    $config = [\n        'debug' =&gt; true,\n        'max_users' =&gt; 100,\n        'app_name' =&gt; 'MyApp',\n    ];\n    \n    return $config[$key] ?? null;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$debug = getConfigValue('debug'); \/\/ bool\u578b (true)\n$maxUsers = getConfigValue('max_users'); \/\/ int\u578b (100)\n$appName = getConfigValue('app_name'); \/\/ string\u578b ('MyApp')\n$unknownKey = getConfigValue('unknown'); \/\/ null\n<\/pre>\n\n\n\n<p><strong>static\u578b<\/strong>\uff1a\u73fe\u5728\u306e\u30af\u30e9\u30b9\u307e\u305f\u306f\u305d\u306e\u5b50\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002\u7279\u306b\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3084\u30c1\u30a7\u30fc\u30f3\u30e1\u30bd\u30c3\u30c9\u3067\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=\"\">class Config {\n    private array $settings = [];\n    \n    public function set(string $key, $value): static {\n        $this-&gt;settings[$key] = $value;\n        return $this;\n    }\n    \n    public static function create(): static {\n        return new static();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$config = Config::create()\n    -&gt;set('debug', true)\n    -&gt;set('environment', 'production');\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-87\">PHP 8.1\u3067\u8ffd\u52a0\u3055\u308c\u305f\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00<\/h5>\n\n\n\n<p>PHP 8.1\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u578b\u5ba3\u8a00\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<p><strong>never\u578b<\/strong>\uff1a\u95a2\u6570\u304c\u5024\u3092\u8fd4\u3055\u306a\u3044\u3060\u3051\u3067\u306a\u304f\u3001\u6b63\u5e38\u306b\u30ea\u30bf\u30fc\u30f3\u3057\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u304b\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function redirect(string $url): never {\n    header(\"Location: $url\");\n    exit;\n}\n\nfunction fail(string $message): never {\n    throw new Exception($message);\n}\n<\/pre>\n\n\n\n<p><strong>intersection\u578b<\/strong>\uff1a\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u578b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">interface Loggable {\n    public function log(): void;\n}\n\ninterface Serializable {\n    public function serialize(): string;\n}\n\nfunction processEntity(object $entity): Loggable&amp;Serializable {\n    \/\/ \u4e21\u65b9\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\n    return $entity;\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-88\">\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u65b9\u6cd5<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u5358\u4e00\u306e<code>return<\/code>\u6587\u3067\u76f4\u63a5\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-89\">1. \u914d\u5217\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h5>\n\n\n\n<p>\u6700\u3082\u4e00\u822c\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u8907\u6570\u306e\u5024\u3092\u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\u3053\u3068\u3067\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=\"\">function getUserInfo(int $userId): array {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\n    return [\n        'id' =&gt; $userId,\n        'name' =&gt; '\u5c71\u7530\u592a\u90ce',\n        'email' =&gt; 'yamada@example.com',\n        'age' =&gt; 30\n    ];\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$userInfo = getUserInfo(123);\necho \"\u540d\u524d: \" . $userInfo['name'] . \"\\n\";\necho \"\u30e1\u30fc\u30eb: \" . $userInfo['email'] . \"\\n\";\n<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u5358\u7d14\u3055\u3067\u3059\u304c\u3001\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u306b\u5bfe\u3059\u308b\u578b\u306e\u30d2\u30f3\u30c8\u304c\u306a\u3044\u305f\u3081\u3001\u6f5c\u5728\u7684\u306a\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-90\">2. \u30ea\u30b9\u30c8\u69cb\u9020\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h5>\n\n\n\n<p>PHP 7.1\u4ee5\u964d\u3067\u306f\u3001\u914d\u5217\u306e\u5206\u89e3\uff08\u30c7\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30ea\u30f3\u30b0\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u95a2\u6570\u304b\u3089\u306e\u623b\u308a\u5024\u3092\u76f4\u63a5\u8907\u6570\u306e\u5909\u6570\u306b\u4ee3\u5165\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=\"\">function getCoordinates(string $address): array {\n    \/\/ \u4f4f\u6240\u304b\u3089\u30b8\u30aa\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u884c\u3046\u51e6\u7406\n    return [35.6812, 139.7671]; \/\/ \u7def\u5ea6\u3001\u7d4c\u5ea6\n}\n\n\/\/ \u914d\u5217\u306e\u5206\u89e3\u3092\u4f7f\u7528\n[$latitude, $longitude] = getCoordinates('\u6771\u4eac\u90fd\u5343\u4ee3\u7530\u533a');\necho \"\u7def\u5ea6: $latitude, \u7d4c\u5ea6: $longitude\\n\";\n<\/pre>\n\n\n\n<p>\u540d\u524d\u4ed8\u304d\u30ad\u30fc\u3092\u6301\u3064\u914d\u5217\u3082\u540c\u69d8\u306b\u5206\u89e3\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=\"\">function getUser(int $id): array {\n    return [\n        'id' =&gt; $id,\n        'name' =&gt; '\u9234\u6728\u82b1\u5b50',\n        'email' =&gt; 'suzuki@example.com'\n    ];\n}\n\n\/\/ \u5fc5\u8981\u306a\u30ad\u30fc\u306e\u307f\u3092\u62bd\u51fa\n['name' =&gt; $name, 'email' =&gt; $email] = getUser(456);\necho \"\u540d\u524d: $name, \u30e1\u30fc\u30eb: $email\\n\";\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-91\">3. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/h5>\n\n\n\n<p>\u3088\u308a\u578b\u5b89\u5168\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u5c02\u7528\u306e\u30af\u30e9\u30b9\u307e\u305f\u306f\u30c7\u30fc\u30bf\u8ee2\u9001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08DTO\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\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 UserDTO {\n    public function __construct(\n        public int $id,\n        public string $name,\n        public string $email,\n        public ?int $age = null\n    ) {}\n}\n\nfunction fetchUser(int $id): UserDTO {\n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\n    return new UserDTO(\n        id: $id,\n        name: '\u4f50\u85e4\u6b21\u90ce',\n        email: 'sato@example.com',\n        age: 28\n    );\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$user = fetchUser(789);\necho \"ID: {$user-&gt;id}, \u540d\u524d: {$user-&gt;name}, \u30e1\u30fc\u30eb: {$user-&gt;email}, \u5e74\u9f62: {$user-&gt;age}\\n\";\n<\/pre>\n\n\n\n<p>PHP 8.0\u4ee5\u964d\u3067\u306f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30d7\u30ed\u30d1\u30c6\u30a3\u6607\u683c\u3092\u4f7f\u7528\u3057\u3066DTO\u3092\u3088\u308a\u7c21\u6f54\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306f\u578b\u5b89\u5168\u3067\u3042\u308a\u3001IDE\u306e\u88dc\u5b8c\u30b5\u30dd\u30fc\u30c8\u3082\u512a\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-92\">4. \u30bf\u30d7\u30eb\u306e\u4f7f\u7528\uff08PHP 8.0\u306e\u69cb\u9020\u5316\u3055\u308c\u305f\u7d50\u679c\u30bb\u30c3\u30c8\uff09<\/h5>\n\n\n\n<p>PHP 8.0\u3067\u306f\u69cb\u9020\u5316\u3055\u308c\u305f\u7d50\u679c\u30bb\u30c3\u30c8\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001PHPDoc\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30bf\u30d7\u30eb\u306e\u3088\u3046\u306a\u69cb\u9020\u3092\u793a\u5506\u3059\u308b\u3053\u3068\u304c\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=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u306e\u540d\u524d\u3068\u5e74\u9f62\u3092\u8fd4\u3059\n * \n * @return array{name: string, age: int} \u540d\u524d\u3068\u5e74\u9f62\u306e\u9023\u60f3\u914d\u5217\n *\/\nfunction getUserBasicInfo(int $userId): array {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\n    return [\n        'name' =&gt; '\u9ad8\u6a4b\u6dbc\u5b50',\n        'age' =&gt; 32\n    ];\n}\n\n$info = getUserBasicInfo(1001);\n\/\/ IDE\u306f $info['name'] \u304c string \u3067\u3042\u308a\u3001$info['age'] \u304c int \u3067\u3042\u308b\u3053\u3068\u3092\u7406\u89e3\u3067\u304d\u308b\n<\/pre>\n\n\n\n<p>\u3053\u308c\u306fPHP\u306e\u5b9f\u884c\u6642\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u304c\u3001\u591a\u304f\u306eIDE\u3084\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u89e3\u6790\u30c4\u30fc\u30eb\u306f\u3053\u308c\u3089\u306e\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u578b\u30d2\u30f3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-93\">5. \u51fa\u529b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u306e\u53c2\u7167\u6e21\u3057<\/h5>\n\n\n\n<p>\u3084\u3084\u53e4\u3044\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u304c\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53c2\u7167\u3067\u6e21\u3057\u3001\u95a2\u6570\u5185\u3067\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function divideWithRemainder(int $dividend, int $divisor, ?int &amp;$quotient, ?int &amp;$remainder): bool {\n    if ($divisor === 0) {\n        return false;\n    }\n    \n    $quotient = intdiv($dividend, $divisor);\n    $remainder = $dividend % $divisor;\n    return true;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$quotient = null;\n$remainder = null;\nif (divideWithRemainder(10, 3, $quotient, $remainder)) {\n    echo \"\u5546: $quotient, \u4f59\u308a: $remainder\\n\"; \/\/ \u51fa\u529b: \u5546: 3, \u4f59\u308a: 1\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u4e00\u822c\u7684\u306b\u306f\u3042\u307e\u308a\u63a8\u5968\u3055\u308c\u305a\u3001\u4e0a\u8a18\u306e\u4ed6\u306e\u65b9\u6cd5\uff08\u7279\u306b\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\uff09\u306e\u65b9\u304c\u512a\u5148\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-94\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1aAPI\u5fdc\u7b54\u30cf\u30f3\u30c9\u30e9\u30fc<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001API\u5fdc\u7b54\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u5b9f\u7528\u7684\u306a\u95a2\u6570\u3067\u3001\u8907\u6570\u306e\u623b\u308a\u5024\u3068\u578b\u5ba3\u8a00\u3092\u6d3b\u7528\u3057\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=\"\">\/**\n * API\u5fdc\u7b54\u30c7\u30fc\u30bf\u306e\u69cb\u9020\n *\/\nclass ApiResponse {\n    public function __construct(\n        public int $statusCode,\n        public string $message,\n        public array $data = [],\n        public ?string $error = null\n    ) {}\n    \n    public function isSuccess(): bool {\n        return $this-&gt;statusCode &gt;= 200 &amp;&amp; $this-&gt;statusCode &lt; 300;\n    }\n    \n    public function toArray(): array {\n        return [\n            'status' =&gt; $this-&gt;statusCode,\n            'message' =&gt; $this-&gt;message,\n            'data' =&gt; $this-&gt;data,\n            'error' =&gt; $this-&gt;error\n        ];\n    }\n}\n\n\/**\n * \u5916\u90e8API\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u5fdc\u7b54\u3092\u51e6\u7406\u3059\u308b\n * \n * @param string $url API URL\n * @param array $params \u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\n * @return ApiResponse API\u304b\u3089\u306e\u5fdc\u7b54\n * @throws Exception API\u547c\u3073\u51fa\u3057\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\n *\/\nfunction callExternalApi(string $url, array $params = []): ApiResponse {\n    try {\n        \/\/ URL\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u69cb\u7bc9\n        if (!empty($params)) {\n            $url .= '?' . http_build_query($params);\n        }\n        \n        \/\/ cURL\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u521d\u671f\u5316\n        $ch = curl_init($url);\n        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);\n        curl_setopt($ch, CURLOPT_TIMEOUT, 10);\n        \n        \/\/ API\u3092\u547c\u3073\u51fa\u3057\n        $response = curl_exec($ch);\n        $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);\n        $curlError = curl_error($ch);\n        curl_close($ch);\n        \n        \/\/ cURL\u30a8\u30e9\u30fc\u3092\u30c1\u30a7\u30c3\u30af\n        if ($response === false) {\n            throw new Exception(\"API\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5931\u6557\u3057\u307e\u3057\u305f: $curlError\");\n        }\n        \n        \/\/ \u30ec\u30b9\u30dd\u30f3\u30b9\u3092JSON\u3068\u3057\u3066\u30c7\u30b3\u30fc\u30c9\n        $decodedResponse = json_decode($response, true);\n        if (json_last_error() !== JSON_ERROR_NONE) {\n            throw new Exception(\"JSON\u306e\u30c7\u30b3\u30fc\u30c9\u306b\u5931\u6557\u3057\u307e\u3057\u305f: \" . json_last_error_msg());\n        }\n        \n        \/\/ API\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u69cb\u7bc9\n        if ($statusCode &gt;= 200 &amp;&amp; $statusCode &lt; 300) {\n            return new ApiResponse(\n                statusCode: $statusCode,\n                message: 'Success',\n                data: $decodedResponse['data'] ?? []\n            );\n        } else {\n            return new ApiResponse(\n                statusCode: $statusCode,\n                message: 'Error',\n                error: $decodedResponse['error'] ?? 'Unknown error'\n            );\n        }\n    } catch (Exception $e) {\n        \/\/ \u4f8b\u5916\u3092\u30e9\u30c3\u30d7\u3057\u3066\u30b9\u30ed\u30fc\n        throw new Exception(\"API\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage(), 0, $e);\n    }\n}\n\n\/**\n * \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\n * \n * @param int $userId \u30e6\u30fc\u30b6\u30fcID\n * @return array \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\n * @throws Exception \u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u3084API\u30a8\u30e9\u30fc\u306e\u5834\u5408\n *\/\nfunction getUserData(int $userId): array {\n    try {\n        $response = callExternalApi(\n            'https:\/\/api.example.com\/users',\n            ['id' =&gt; $userId]\n        );\n        \n        if (!$response-&gt;isSuccess()) {\n            throw new Exception(\"\u30e6\u30fc\u30b6\u30fc\u53d6\u5f97\u30a8\u30e9\u30fc: \" . $response-&gt;error);\n        }\n        \n        if (empty($response-&gt;data)) {\n            throw new Exception(\"\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093: ID $userId\");\n        }\n        \n        return $response-&gt;data;\n    } catch (Exception $e) {\n        \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u8a18\u9332\n        error_log($e-&gt;getMessage());\n        throw $e;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    $userData = getUserData(12345);\n    echo \"\u30e6\u30fc\u30b6\u30fc\u540d: \" . $userData['name'] . \"\\n\";\n    echo \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9: \" . $userData['email'] . \"\\n\";\n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\";\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u5916\u90e8API\u3092\u547c\u3073\u51fa\u3057\u3066\u7d50\u679c\u3092\u51e6\u7406\u3059\u308b\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002API\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u306f\u5c02\u7528\u306e\u30af\u30e9\u30b9\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u3001\u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\u3092\u7c21\u5358\u306b\u78ba\u8a8d\u3067\u304d\u3001\u6210\u529f\u3057\u305f\u5834\u5408\u306f\u30c7\u30fc\u30bf\u306b\u3001\u5931\u6557\u3057\u305f\u5834\u5408\u306f\u30a8\u30e9\u30fc\u60c5\u5831\u306b\u7c21\u5358\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-95\">\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u306b\u95a2\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u80fd\u306a\u9650\u308a\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3059\u308b<\/strong>\uff1a \u578b\u5ba3\u8a00\u306f\u95a2\u6570\u306e\u5951\u7d04\u3092\u660e\u78ba\u306b\u3057\u3001\u30b3\u30fc\u30c9\u306e\u81ea\u5df1\u6587\u66f8\u5316\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u9069\u5207\u306a\u7c92\u5ea6\u306e\u578b\u3092\u9078\u629e\u3059\u308b<\/strong>\uff1a \u4f8b\u3048\u3070\u3001<code>mixed<\/code>\u3088\u308a\u3082\u5177\u4f53\u7684\u306a\u578b\uff08<code>string|int<\/code>\u306a\u3069\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>null\u8a31\u5bb9\uff08nullable\uff09\u578b\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b<\/strong>\uff1a \u5024\u304cnull\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u660e\u793a\u7684\u306b\u793a\u3057\u307e\u3059\uff08\u4f8b\uff1a<code>?string<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u5834\u5408\u306f\u69cb\u9020\u5316\u3059\u308b<\/strong>\uff1a \u5358\u7d14\u306a\u914d\u5217\u3088\u308a\u3082\u3001DTO\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>PHPDoc\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u6d3b\u7528\u3059\u308b<\/strong>\uff1a \u7279\u306b\u914d\u5217\u306e\u69cb\u9020\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306b\u3001<code>@return array{key: type, ...}<\/code>\u306e\u3088\u3046\u306a\u5f62\u5f0f\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u4e00\u8cab\u6027\u3092\u4fdd\u3064<\/strong>\uff1a \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5185\u3067\u4e00\u8cab\u3057\u305f\u623b\u308a\u5024\u306e\u578b\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u4f8b\u5916\u3092\u4f7f\u7528\u3057\u3066\u7570\u5e38\u7cfb\u3092\u51e6\u7406\u3059\u308b<\/strong>\uff1a \u8907\u6570\u306e\u623b\u308a\u5024\u578b\u3092\u4f7f\u3063\u3066\u30a8\u30e9\u30fc\u72b6\u614b\u3092\u8868\u3059\u3088\u308a\u3082\u3001\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u65b9\u304c\u9069\u5207\u306a\u5834\u5408\u304c\u591a\u3044\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-96\">\u307e\u3068\u3081<\/h4>\n\n\n\n<p>PHP 7\u4ee5\u964d\u306e\u578b\u5ba3\u8a00\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u5f37\u529b\u306a\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u8907\u6570\u306e\u5024\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u914d\u5217\u3001\u30ea\u30b9\u30c8\u69cb\u9020\uff08\u30c7\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30ea\u30f3\u30b0\uff09\u3001\u5c02\u7528\u306eDTO\u30af\u30e9\u30b9\u306a\u3069\u3001\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u9069\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u4f7f\u7528\u4f8b\u306e\u8907\u96d1\u3055\u3068\u578b\u5b89\u5168\u6027\u306e\u8981\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u306e\u578b\u30b7\u30b9\u30c6\u30e0\u306f\u9032\u5316\u3057\u7d9a\u3051\u3066\u304a\u308a\u3001PHP 8\u3067\u306f\u5171\u7528\u578b\uff08Union Types\uff09\u3084nullable\u578b\u306a\u3069\u306e\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u578b\u5ba3\u8a00\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-97\">PHP\u306e\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd<\/h2>\n\n\n\n<p>PHP\u306e\u95a2\u6570\u6a5f\u80fd\u306f\u3001\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u306b\u3068\u3069\u307e\u3089\u305a\u3001\u3088\u308a\u9ad8\u5ea6\u3067\u67d4\u8edf\u306a\u6a5f\u80fd\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u3001\u518d\u5e30\u95a2\u6570\u306a\u3069\u3001\u30e2\u30c0\u30f3\u306aPHP\u958b\u767a\u3067\u6d3b\u7528\u3067\u304d\u308b\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\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<h3 class=\"wp-block-heading\" id=\"i-98\">\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3068\u305d\u306e\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\uff08anonymous function\uff09\u306f\u3001\u540d\u524d\u3092\u6301\u305f\u305a\u3001\u5909\u6570\u306b\u4ee3\u5165\u3057\u3066\u4f7f\u7528\u3059\u308b\u95a2\u6570\u3067\u3059\u3002\u3053\u308c\u306fJavaScript\u3067\u306f\u4e00\u822c\u7684\u306a\u6982\u5ff5\u3067\u3001PHP 5.3\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u7121\u540d\u95a2\u6570\u306f\u300c\u30af\u30ed\u30fc\u30b8\u30e3\uff08closure\uff09\u300d\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-99\">\u57fa\u672c\u7684\u306a\u7121\u540d\u95a2\u6570\u306e\u5b9a\u7fa9\u3068\u4f7f\u7528\u6cd5<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\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=\"\">$functionVariable = function(\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8) [use (\u5909\u6570\u30ea\u30b9\u30c8)] {\n    \/\/ \u95a2\u6570\u306e\u51e6\u7406\n    return \u623b\u308a\u5024;\n};\n<\/pre>\n\n\n\n<p>\u30b7\u30f3\u30d7\u30eb\u306a\u4f8b\u304b\u3089\u898b\u3066\u307f\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=\"\">$greet = function($name) {\n    return \"\u3053\u3093\u306b\u3061\u306f\u3001$name \u3055\u3093\uff01\";\n};\n\necho $greet(\"\u7530\u4e2d\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u7530\u4e2d \u3055\u3093\uff01\n<\/pre>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306f\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u4ed6\u306e\u5909\u6570\u3068\u540c\u69d8\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5909\u6570\u3092\u4ed6\u306e\u5909\u6570\u306b\u4ee3\u5165\n$sayHello = $greet;\necho $sayHello(\"\u4f50\u85e4\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u4f50\u85e4 \u3055\u3093\uff01\n\n\/\/ \u914d\u5217\u306b\u683c\u7d0d\n$functions = [\n    \"greet\" =&gt; $greet,\n    \"farewell\" =&gt; function($name) {\n        return \"\u3055\u3088\u3046\u306a\u3089\u3001$name \u3055\u3093\uff01\";\n    }\n];\n\necho $functions[\"greet\"](\"\u9234\u6728\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728 \u3055\u3093\uff01\necho $functions[\"farewell\"](\"\u9ad8\u6a4b\"); \/\/ \u51fa\u529b: \u3055\u3088\u3046\u306a\u3089\u3001\u9ad8\u6a4b \u3055\u3093\uff01\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-100\">use\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u308b\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n\n<p>\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u91cd\u8981\u306a\u7279\u5fb4\u306e\u4e00\u3064\u306f\u3001\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u300c\u30ad\u30e3\u30d7\u30c1\u30e3\u300d\u3059\u308b\u80fd\u529b\u3067\u3059\u3002\u3053\u308c\u306b\u306f<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$message = \"\u3053\u3093\u306b\u3061\u306f\";\n\n$greet = function($name) use ($message) {\n    return \"$message\u3001$name \u3055\u3093\uff01\";\n};\n\necho $greet(\"\u5c71\u7530\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u5c71\u7530 \u3055\u3093\uff01\n\n\/\/ \u5143\u306e\u5909\u6570\u3092\u5909\u66f4\u3057\u3066\u3082\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u306e\u5024\u306f\u5909\u308f\u3089\u306a\u3044\n$message = \"\u304a\u306f\u3088\u3046\";\necho $greet(\"\u5c71\u7530\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u5c71\u7530 \u3055\u3093\uff01\uff08\u5909\u308f\u3089\u306a\u3044\uff09\n<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<code>$message<\/code>\u5909\u6570\u306e\u5024\u304c\u30af\u30ed\u30fc\u30b8\u30e3\u4f5c\u6210\u6642\u306b\u30b3\u30d4\u30fc\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5143\u306e\u5909\u6570\u3092\u5909\u66f4\u3057\u3066\u3082\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u306e\u5024\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3082\u3057\u5916\u90e8\u5909\u6570\u3078\u306e\u53c2\u7167\u3092\u7dad\u6301\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u7528\u3057\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=\"\">$counter = 0;\n\n$increment = function() use (&amp;$counter) {\n    $counter++;\n    return $counter;\n};\n\necho $increment(); \/\/ \u51fa\u529b: 1\necho $increment(); \/\/ \u51fa\u529b: 2\necho $counter; \/\/ \u51fa\u529b: 2\uff08\u5916\u90e8\u5909\u6570\u3082\u5909\u66f4\u3055\u308c\u3066\u3044\u308b\uff09\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-101\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3068\u3057\u3066\u306e\u7121\u540d\u95a2\u6570<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u4f7f\u7528\u4f8b\u306e\u4e00\u3064\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u3057\u3066\u306e\u5229\u7528\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u914d\u5217\u95a2\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u5834\u5408\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u5404\u8981\u7d20\u30922\u500d\u306b\u3059\u308b\n$doubled = array_map(function($n) {\n    return $n * 2;\n}, $numbers);\n\nprint_r($doubled); \/\/ [2, 4, 6, 8, 10]\n\n\/\/ \u5076\u6570\u306e\u307f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$evens = array_filter($numbers, function($n) {\n    return $n % 2 === 0;\n});\n\nprint_r($evens); \/\/ [2, 4]\n\n\/\/ \u5408\u8a08\u3092\u8a08\u7b97\n$sum = array_reduce($numbers, function($carry, $n) {\n    return $carry + $n;\n}, 0);\n\necho $sum; \/\/ \u51fa\u529b: 15\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-102\">\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff1a\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306f\u3001\u914d\u5217\u306e\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u306e\u3088\u3046\u306a\u8907\u96d1\u306a\u30bf\u30b9\u30af\u306b\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    ['name' =&gt; '\u7530\u4e2d', 'age' =&gt; 28, 'premium' =&gt; true],\n    ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 22, 'premium' =&gt; false],\n    ['name' =&gt; '\u9234\u6728', 'age' =&gt; 35, 'premium' =&gt; true],\n    ['name' =&gt; '\u9ad8\u6a4b', 'age' =&gt; 24, 'premium' =&gt; false],\n];\n\n\/\/ \u30d7\u30ec\u30df\u30a2\u30e0\u30e6\u30fc\u30b6\u30fc\u3092\u5148\u982d\u306b\u3001\u305d\u306e\u5f8c\u306f\u5e74\u9f62\u306e\u6607\u9806\u3067\u30bd\u30fc\u30c8\nusort($users, function($a, $b) {\n    \/\/ \u307e\u305a\u3001\u30d7\u30ec\u30df\u30a2\u30e0\u72b6\u614b\u3067\u6bd4\u8f03\n    if ($a['premium'] !== $b['premium']) {\n        return $a['premium'] ? -1 : 1; \/\/ \u30d7\u30ec\u30df\u30a2\u30e0\u30e6\u30fc\u30b6\u30fc\u3092\u5148\u306b\n    }\n    \n    \/\/ \u30d7\u30ec\u30df\u30a2\u30e0\u72b6\u614b\u304c\u540c\u3058\u5834\u5408\u306f\u5e74\u9f62\u3067\u6bd4\u8f03\n    return $a['age'] - $b['age']; \/\/ \u5e74\u9f62\u306e\u6607\u9806\n});\n\nforeach ($users as $user) {\n    echo \"{$user['name']} ({$user['age']}\u6b73) - \" . \n         ($user['premium'] ? '\u30d7\u30ec\u30df\u30a2\u30e0' : '\u901a\u5e38') . \"\\n\";\n}\n\n\/* \u51fa\u529b:\n\u9234\u6728 (35\u6b73) - \u30d7\u30ec\u30df\u30a2\u30e0\n\u7530\u4e2d (28\u6b73) - \u30d7\u30ec\u30df\u30a2\u30e0\n\u4f50\u85e4 (22\u6b73) - \u901a\u5e38\n\u9ad8\u6a4b (24\u6b73) - \u901a\u5e38\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-103\">\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u675f\u7e1b\uff08Binding\uff09<\/h4>\n\n\n\n<p>PHP 5.4\u4ee5\u964d\u3067\u306f\u3001<code>bindTo()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u306e<code>$this<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30b9\u30b3\u30fc\u30d7\u3092\u5909\u66f4\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=\"\">class Logger {\n    private $logFile;\n    private $level;\n    \n    public function __construct($file, $level) {\n        $this-&gt;logFile = $file;\n        $this-&gt;level = $level;\n    }\n    \n    public function createLogFunction() {\n        return function($message) {\n            $date = date('Y-m-d H:i:s');\n            file_put_contents(\n                $this-&gt;logFile,\n                \"[$date] [{$this-&gt;level}] $message\" . PHP_EOL,\n                FILE_APPEND\n            );\n        };\n    }\n}\n\n$logger = new Logger('app.log', 'INFO');\n$logInfo = $logger-&gt;createLogFunction();\n$logInfo('\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u8d77\u52d5\u3057\u307e\u3057\u305f');\n\n\/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u7528\u306b\u65b0\u3057\u3044\u30ed\u30ac\u30fc\u3092\u4f5c\u6210\n$errorLogger = new Logger('error.log', 'ERROR');\n$logError = $errorLogger-&gt;createLogFunction();\n$logError('\u63a5\u7d9a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f');\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-104\">\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3088\u308b\u30b3\u30fc\u30c9\u306e\u7c21\u7565\u5316<\/h3>\n\n\n\n<p>PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u95a2\u6570\uff08Arrow Functions\uff09\u306f\u3001\u7121\u540d\u95a2\u6570\u3092\u3088\u308a\u7c21\u6f54\u306b\u66f8\u304f\u305f\u3081\u306e\u77ed\u7e2e\u69cb\u6587\u3067\u3059\u3002\u7279\u306b\u5358\u7d14\u306a\u30af\u30ed\u30fc\u30b8\u30e3\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-105\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\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=\"\">$fn = fn(\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8) =&gt; \u5f0f;\n<\/pre>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u3068\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\n$double = function($x) {\n    return $x * 2;\n};\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\n$double = fn($x) =&gt; $x * 2;\n\necho $double(5); \/\/ \u51fa\u529b: 10\n<\/pre>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u5e38\u306b\u5f0f\u3092\u8fd4\u3059\u305f\u3081\u3001<code>return<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4e0d\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u5916\u90e8\u5909\u6570\u3092\u81ea\u52d5\u7684\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u306e\u3067\u3001<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3082\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$factor = 3;\n\n\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\n$multiply = function($x) use ($factor) {\n    return $x * $factor;\n};\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\n$multiply = fn($x) =&gt; $x * $factor;\n\necho $multiply(5); \/\/ \u51fa\u529b: 15\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-106\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5236\u9650\u4e8b\u9805<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u306f\u4ee5\u4e0b\u306e\u5236\u9650\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u5f0f\u306e\u307f\u3092\u542b\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff08\u8907\u6570\u306e\u6587\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\uff09<\/li>\n\n\n\n<li>\u4e2d\u62ec\u5f27<code>{}<\/code>\u3092\u4f7f\u3063\u3066\u672c\u4f53\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093<\/li>\n\n\n\n<li>\u5916\u90e8\u5909\u6570\u306f\u5e38\u306b\u5024\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u307e\u3059\uff08\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\uff09<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-107\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001\u914d\u5217\u64cd\u4f5c\u306e\u3088\u3046\u306a\u77ed\u3044\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u7279\u306b\u9069\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u914d\u5217\u306e\u5404\u8981\u7d20\u30922\u4e57\n$squared = array_map(fn($n) =&gt; $n * $n, $numbers);\nprint_r($squared); \/\/ [1, 4, 9, 16, 25]\n\n\/\/ 10\u3088\u308a\u5927\u304d\u3044\u8981\u7d20\u306e\u307f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$products = [\n    ['name' =&gt; '\u30ce\u30fc\u30c8PC', 'price' =&gt; 85000],\n    ['name' =&gt; '\u30de\u30a6\u30b9', 'price' =&gt; 3500],\n    ['name' =&gt; '\u30ad\u30fc\u30dc\u30fc\u30c9', 'price' =&gt; 12000],\n    ['name' =&gt; '\u30e2\u30cb\u30bf\u30fc', 'price' =&gt; 45000],\n];\n\n$expensiveProducts = array_filter($products, fn($p) =&gt; $p['price'] &gt; 10000);\nforeach ($expensiveProducts as $product) {\n    echo \"{$product['name']}: {$product['price']}\u5186\\n\";\n}\n\/* \u51fa\u529b:\n\u30ce\u30fc\u30c8PC: 85000\u5186\n\u30ad\u30fc\u30dc\u30fc\u30c9: 12000\u5186\n\u30e2\u30cb\u30bf\u30fc: 45000\u5186\n*\/\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-108\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u30cd\u30b9\u30c8<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u4ed6\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u30cd\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u7530\u4e2d'],\n    ['id' =&gt; 2, 'name' =&gt; '\u4f50\u85e4'],\n    ['id' =&gt; 3, 'name' =&gt; '\u9234\u6728'],\n];\n\n$getUserById = fn($id) =&gt; fn($user) =&gt; $user['id'] === $id;\n\n$user = array_filter($users, $getUserById(2));\nprint_r(array_values($user)); \/\/ [['id' =&gt; 2, 'name' =&gt; '\u4f50\u85e4']]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-109\">\u7121\u540d\u95a2\u6570\u3068\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u4f7f\u3044\u5206\u3051<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3057\u3087\u3046\u304b\uff1f\u4ee5\u4e0b\u306e\u57fa\u6e96\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u5f0f\u3092\u8fd4\u3059\u7c21\u5358\u306a\u95a2\u6570<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3057\u305f\u3044\u5834\u5408<\/li>\n\n\n\n<li>\u5916\u90e8\u5909\u6570\u306e\u5024\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u5341\u5206\u306a\u5834\u5408<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7121\u540d\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u6587\u304c\u5fc5\u8981\u306a\u8907\u96d1\u306a\u51e6\u7406<\/li>\n\n\n\n<li>\u53c2\u7167\u306b\u3088\u308b\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u6761\u4ef6\u5206\u5c90\u306a\u3069\u306e\u30ed\u30b8\u30c3\u30af\u304c\u542b\u307e\u308c\u308b\u5834\u5408<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-110\">\u518d\u5e30\u95a2\u6570\u306e\u7406\u89e3\u3068\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u518d\u5e30\u95a2\u6570\uff08recursive function\uff09\u306f\u3001\u81ea\u5206\u81ea\u8eab\u3092\u547c\u3073\u51fa\u3059\u95a2\u6570\u3067\u3059\u3002\u518d\u5e30\u306f\u3001\u554f\u984c\u3092\u3088\u308a\u5c0f\u3055\u306a\u540c\u3058\u554f\u984c\u306b\u5206\u89e3\u3067\u304d\u308b\u5834\u5408\u306b\u7279\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-111\">\u518d\u5e30\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5<\/h4>\n\n\n\n<p>\u518d\u5e30\u95a2\u6570\u306e\u91cd\u8981\u306a\u8981\u7d20\u306f\u4ee5\u4e0b\u306e2\u3064\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u5e95\u30b1\u30fc\u30b9\uff08Base Case\uff09<\/strong>\uff1a\u518d\u5e30\u3092\u505c\u6b62\u3059\u308b\u6761\u4ef6<\/li>\n\n\n\n<li><strong>\u518d\u5e30\u30b1\u30fc\u30b9\uff08Recursive Case\uff09<\/strong>\uff1a\u95a2\u6570\u304c\u81ea\u5206\u81ea\u8eab\u3092\u547c\u3073\u51fa\u3059\u90e8\u5206<\/li>\n<\/ol>\n\n\n\n<p>\u7c21\u5358\u306a\u4f8b\u3068\u3057\u3066\u3001\u968e\u4e57\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\u3092\u898b\u3066\u307f\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=\"\">function factorial($n) {\n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9\uff1a0\u307e\u305f\u306f1\u306e\u968e\u4e57\u306f1\n    if ($n &lt;= 1) {\n        return 1;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9\uff1an! = n * (n-1)!\n    return $n * factorial($n - 1);\n}\n\necho factorial(5); \/\/ \u51fa\u529b: 120 (5 * 4 * 3 * 2 * 1)\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306e\u5b9f\u884c\u30d5\u30ed\u30fc\u306f\u6b21\u306e\u3088\u3046\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=\"\">factorial(5)\n= 5 * factorial(4)\n= 5 * (4 * factorial(3))\n= 5 * (4 * (3 * factorial(2)))\n= 5 * (4 * (3 * (2 * factorial(1))))\n= 5 * (4 * (3 * (2 * 1)))\n= 5 * (4 * (3 * 2))\n= 5 * (4 * 6)\n= 5 * 24\n= 120\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-112\">\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u4f8b<\/h4>\n\n\n\n<p>\u3082\u3046\u4e00\u3064\u306e\u30af\u30e9\u30b7\u30c3\u30af\u306a\u518d\u5e30\u306e\u4f8b\u306f\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u3067\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=\"\">function fibonacci($n) {\n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9\n    return fibonacci($n - 1) + fibonacci($n - 2);\n}\n\necho fibonacci(0); \/\/ \u51fa\u529b: 0\necho fibonacci(1); \/\/ \u51fa\u529b: 1\necho fibonacci(5); \/\/ \u51fa\u529b: 5 (0 + 1 + 1 + 2 + 3 + 5)\n<\/pre>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u30ca\u30a4\u30fc\u30d6\u306a\u5b9f\u88c5\u306f\u3001\u540c\u3058\u5024\u3092\u4f55\u5ea6\u3082\u8a08\u7b97\u3059\u308b\u305f\u3081\u975e\u52b9\u7387\u3067\u3059\u3002\u30e1\u30e2\u5316\uff08\u8a08\u7b97\u7d50\u679c\u3092\u8a18\u61b6\u3059\u308b\u6280\u8853\uff09\u3092\u4f7f\u7528\u3057\u3066\u6539\u5584\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function fibonacciMemoized($n, &amp;$memo = []) {\n    \/\/ \u3059\u3067\u306b\u8a08\u7b97\u6e08\u307f\u306e\u5024\u306f\u30e1\u30e2\u304b\u3089\u53d6\u5f97\n    if (isset($memo[$n])) {\n        return $memo[$n];\n    }\n    \n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9\u306e\u7d50\u679c\u3092\u30e1\u30e2\u306b\u4fdd\u5b58\n    $memo[$n] = fibonacciMemoized($n - 1, $memo) + fibonacciMemoized($n - 2, $memo);\n    return $memo[$n];\n}\n\necho fibonacciMemoized(30); \/\/ \u5927\u304d\u306a\u5024\u3067\u3082\u52b9\u7387\u7684\u306b\u8a08\u7b97\u53ef\u80fd\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-113\">\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u8d70\u67fb\u306e\u4f8b<\/h4>\n\n\n\n<p>\u518d\u5e30\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u3088\u3046\u306a\u30c4\u30ea\u30fc\u69cb\u9020\u3092\u6271\u3046\u5834\u5408\u306b\u7279\u306b\u6709\u7528\u3067\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=\"\">function listDirectoryContents($dir, $indent = '') {\n    $files = scandir($dir);\n    \n    foreach ($files as $file) {\n        \/\/ \u7279\u6b8a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30b9\u30ad\u30c3\u30d7\n        if ($file === '.' || $file === '..') {\n            continue;\n        }\n        \n        $path = $dir . '\/' . $file;\n        \n        if (is_dir($path)) {\n            \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5834\u5408\u306f\u518d\u5e30\u7684\u306b\u51e6\u7406\n            echo $indent . \"\ud83d\udcc1 \" . $file . \"\\n\";\n            listDirectoryContents($path, $indent . '    ');\n        } else {\n            \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u5834\u5408\u306f\u8868\u793a\u306e\u307f\n            echo $indent . \"\ud83d\udcc4 \" . $file . \"\\n\";\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff08\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5185\u5bb9\u3092\u8868\u793a\uff09\nlistDirectoryContents('.');\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-114\">\u518d\u5e30\u306e\u5236\u9650\u3068\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<p>\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc<\/strong>\uff1aPHP\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u518d\u5e30\u6df1\u5ea6\u5236\u9650\u306f\u7d04100\u301c200\u30ec\u30d9\u30eb\u3067\u3059\u3002\u3053\u308c\u3092\u8d85\u3048\u308b\u518d\u5e30\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong>\uff1a\u5404\u518d\u5e30\u547c\u3073\u51fa\u3057\u306f\u30b9\u30bf\u30c3\u30af\u306b\u30d5\u30ec\u30fc\u30e0\u3092\u8ffd\u52a0\u3059\u308b\u305f\u3081\u3001\u5927\u91cf\u306e\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5b9f\u884c\u6642\u9593<\/strong>\uff1a\u6df1\u3044\u518d\u5e30\u306f\u5b9f\u884c\u6642\u9593\u304c\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u7121\u9650\u518d\u5e30<\/strong>\uff1a\u57fa\u5e95\u30b1\u30fc\u30b9\u304c\u9069\u5207\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u7121\u9650\u518d\u5e30\u306b\u9665\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u7279\u306b\u5927\u304d\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3084\u6df1\u3044\u30c4\u30ea\u30fc\u69cb\u9020\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u53cd\u5fa9\uff08\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\uff09\u30d9\u30fc\u30b9\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u5207\u308a\u66ff\u3048\u305f\u308a\u3001\u30c6\u30fc\u30eb\u30b3\u30fc\u30eb\u6700\u9069\u5316\uff08PHP\u516c\u5f0f\u306b\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093\uff09\u3084\u30c8\u30e9\u30f3\u30dd\u30ea\u30f3\u95a2\u6570\u306a\u3069\u306e\u6280\u8853\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\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=\"\">\/\/ \u4f8b\uff1a\u914d\u5217\u3092\u30d5\u30e9\u30c3\u30c8\u5316\u3059\u308b\u518d\u5e30\u95a2\u6570\nfunction flattenArray(array $array): array {\n    $result = [];\n    \n    foreach ($array as $item) {\n        if (is_array($item)) {\n            \/\/ \u914d\u5217\u306e\u5834\u5408\u306f\u518d\u5e30\u7684\u306b\u30d5\u30e9\u30c3\u30c8\u5316\u3057\u3066\u7d50\u679c\u3092\u30de\u30fc\u30b8\n            $result = array_merge($result, flattenArray($item));\n        } else {\n            \/\/ \u914d\u5217\u3067\u306a\u3044\u5834\u5408\u306f\u305d\u306e\u307e\u307e\u8ffd\u52a0\n            $result[] = $item;\n        }\n    }\n    \n    return $result;\n}\n\n$nestedArray = [1, [2, [3, 4], 5], 6];\nprint_r(flattenArray($nestedArray)); \/\/ [1, 2, 3, 4, 5, 6]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-115\">\u518d\u5e30\u306e\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u518d\u5e30\u95a2\u6570\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u7279\u306b\u6709\u7528\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c4\u30ea\u30fc\u69cb\u9020\u3084\u30b0\u30e9\u30d5\u306e\u8d70\u67fb<\/li>\n\n\n\n<li>\u5206\u5272\u7d71\u6cbb\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/li>\n\n\n\n<li>\u968e\u5c64\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/li>\n\n\n\n<li>\u81ea\u7136\u306b\u518d\u5e30\u7684\u306b\u8868\u73fe\u3067\u304d\u308b\u554f\u984c\uff08\u968e\u4e57\u3001\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5236\u9650\u3092\u5e38\u306b\u610f\u8b58\u3057\u3001\u9069\u5207\u306a\u5834\u9762\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-116\">\u307e\u3068\u3081\uff1a\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>PHP\u306e\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3068\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/strong>\uff1a \u7121\u540d\u95a2\u6570\u3084\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408\u306e\u30b3\u30fc\u30c9\u304c\u7c21\u6f54\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u67d4\u8edf\u6027\u306e\u5411\u4e0a<\/strong>\uff1a \u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u305f\u3081\u3001\u3088\u308a\u67d4\u8edf\u306a\u95a2\u6570\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3068\u5206\u96e2\u6027\u306e\u5411\u4e0a<\/strong>\uff1a \u5c0f\u3055\u306a\u95a2\u6570\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u8907\u96d1\u306a\u554f\u984c\u306e\u5358\u7d14\u5316<\/strong>\uff1a \u518d\u5e30\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7279\u5b9a\u306e\u30bf\u30a4\u30d7\u306e\u8907\u96d1\u306a\u554f\u984c\u3092\u76f4\u611f\u7684\u304b\u3064\u7c21\u6f54\u306b\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-117\">\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3068\u305d\u306e\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>PHP 5.3\u3067\u5c0e\u5165\u3055\u308c\u305f\u7121\u540d\u95a2\u6570\uff08anonymous functions\uff09\u306f\u3001\u30e2\u30c0\u30f3\u306aPHP\u958b\u767a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u3067\u3059\u3002\u540d\u524d\u3092\u6301\u305f\u305a\u306b\u5b9a\u7fa9\u3055\u308c\u3001\u5909\u6570\u306b\u683c\u7d0d\u3067\u304d\u308b\u95a2\u6570\u3067\u3001\u30af\u30ed\u30fc\u30b8\u30e3\uff08closure\uff09\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u3001\u67d4\u8edf\u306b\u3001\u305d\u3057\u3066\u52b9\u679c\u7684\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-118\">\u7121\u540d\u95a2\u6570\u306e\u57fa\u672c<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-119\">\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u7279\u6b8a\u30e1\u30bd\u30c3\u30c9<\/h4>\n\n\n\n<p>PHP\u306e\u30af\u30ed\u30fc\u30b8\u30e3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u7279\u6b8a\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-120\">bindTo()\u30e1\u30bd\u30c3\u30c9<\/h5>\n\n\n\n<p><code>bindTo()<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u306e<code>$this<\/code>\u3068\u547c\u3073\u51fa\u3057\u30b9\u30b3\u30fc\u30d7\u3092\u5909\u66f4\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=\"\">class Hello {\n    private $greeting = \"\u3053\u3093\u306b\u3061\u306f\";\n    \n    public function getGreeter() {\n        return function($name) {\n            return \"{$this-&gt;greeting}, {$name}\u3055\u3093\uff01\";\n        };\n    }\n}\n\nclass Goodbye {\n    private $greeting = \"\u3055\u3088\u3046\u306a\u3089\";\n}\n\n$hello = new Hello();\n$greeter = $hello-&gt;getGreeter();\n\ntry {\n    \/\/ \u76f4\u63a5\u547c\u3073\u51fa\u3059\u3068\u30a8\u30e9\u30fc\uff08$this\u304c\u30d0\u30a4\u30f3\u30c9\u3055\u308c\u3066\u3044\u306a\u3044\uff09\n    echo $greeter(\"\u7530\u4e2d\"); \/\/ \u30a8\u30e9\u30fc\n} catch (Error $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\";\n}\n\n\/\/ Hello\u30af\u30e9\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u30d0\u30a4\u30f3\u30c9\u3057\u3066This\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\n$boundGreeter = $greeter-&gt;bindTo(new Hello(), Hello::class);\necho $boundGreeter(\"\u7530\u4e2d\") . \"\\n\"; \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f, \u7530\u4e2d\u3055\u3093\uff01\n\n\/\/ Goodbye\u30af\u30e9\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u3053\u3068\u3067This\u53c2\u7167\u3067\u5225\u306e\u5024\u304c\u53c2\u7167\u3067\u304d\u308b\n$goodbyeGreeter = $greeter-&gt;bindTo(new Goodbye(), Goodbye::class);\necho $goodbyeGreeter(\"\u4f50\u85e4\") . \"\\n\"; \/\/ \u51fa\u529b: \u3055\u3088\u3046\u306a\u3089, \u4f50\u85e4\u3055\u3093\uff01\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-121\">Closure::fromCallable()<\/h5>\n\n\n\n<p>PHP 7.1\u3067\u306f\u3001callable\u5024\u304b\u3089\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f5c\u6210\u3059\u308b<code>Closure::fromCallable()<\/code>\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Calculator {\n    public function add($a, $b) {\n        return $a + $b;\n    }\n}\n\n$calculator = new Calculator();\n\n\/\/ \u30e1\u30bd\u30c3\u30c9\u3092\u30af\u30ed\u30fc\u30b8\u30e3\u306b\u5909\u63db\n$add = Closure::fromCallable([$calculator, 'add']);\necho $add(5, 3) . \"\\n\"; \/\/ \u51fa\u529b: 8\n\n\/\/ \u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3084\u95a2\u6570\u3082\u5909\u63db\u53ef\u80fd\nfunction multiply($a, $b) {\n    return $a * $b;\n}\n\n$multiply = Closure::fromCallable('multiply');\necho $multiply(4, 2) . \"\\n\"; \/\/ \u51fa\u529b: 8\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-122\">\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8003\u616e\u4e8b\u9805<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306e\u4f7f\u7528\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u8003\u616e\u4e8b\u9805\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong>\uff1a \u30af\u30ed\u30fc\u30b8\u30e3\u306f\u901a\u5e38\u306e\u95a2\u6570\u3088\u308a\u3082\u591a\u304f\u306e\u30e1\u30e2\u30ea\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5b9f\u884c\u901f\u5ea6<\/strong>\uff1a \u5185\u90e8\u7684\u306b\u306f\u3001\u7121\u540d\u95a2\u6570\u306f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u901a\u5e38\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u3088\u308a\u3082\u308f\u305a\u304b\u306b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>use\u306b\u3088\u308b\u5909\u6570\u306e\u30b3\u30d4\u30fc<\/strong>\uff1a \u591a\u304f\u306e\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u914d\u5217\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5897\u52a0\u3057\u307e\u3059\u3002\u5fc5\u8981\u306a\u5834\u5408\u306f\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u304b\u3001\u5fc5\u8981\u306a\u60c5\u5831\u3060\u3051\u3092\u62bd\u51fa\u3057\u3066\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n\n\n\n<li><strong>\u518d\u5229\u7528\u6027<\/strong>\uff1a \u30eb\u30fc\u30d7\u5185\u3067\u7121\u540d\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u53cd\u5fa9\u3054\u3068\u306b\u65b0\u3057\u3044\u30af\u30ed\u30fc\u30b8\u30e3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u308b\u305f\u3081\u975e\u52b9\u7387\u3067\u3059\u3002\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001\u30eb\u30fc\u30d7\u306e\u5916\u3067\u5b9a\u7fa9\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u975e\u52b9\u7387\u306a\u4f8b\n$result = [];\nforeach ($items as $i =&gt; $item) {\n    $result[$i] = array_filter($item, function($value) {\n        \/\/ \u6bce\u56de\u65b0\u3057\u3044\u30af\u30ed\u30fc\u30b8\u30e3\u304c\u4f5c\u6210\u3055\u308c\u308b\n        return $value &gt; 0;\n    });\n}\n\n\/\/ \u52b9\u7387\u7684\u306a\u4f8b\n$filterPositive = function($value) {\n    return $value &gt; 0;\n};\n\n$result = [];\nforeach ($items as $i =&gt; $item) {\n    $result[$i] = array_filter($item, $filterPositive);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-123\">\u30af\u30ed\u30fc\u30b8\u30e3\u3068\u7121\u540d\u95a2\u6570\u306e\u9055\u3044<\/h4>\n\n\n\n<p>\u53b3\u5bc6\u306b\u306f\u3001PHP\u3067\u306f\u300c\u30af\u30ed\u30fc\u30b8\u30e3\u300d\u3068\u300c\u7121\u540d\u95a2\u6570\u300d\u306f\u540c\u3058\u3082\u306e\u3092\u6307\u3057\u307e\u3059\u3002PHP\u306e<code>Closure<\/code>\u30af\u30e9\u30b9\u306f\u7121\u540d\u95a2\u6570\u306e\u5185\u90e8\u8868\u73fe\u3067\u3059\u3002\u3053\u308c\u306f\u4ed6\u306e\u8a00\u8a9e\u3068\u306f\u5c11\u3057\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001JavaScript\u3067\u306f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7121\u540d\u95a2\u6570<\/strong>\uff1a\u540d\u524d\u3092\u6301\u305f\u306a\u3044\u95a2\u6570<\/li>\n\n\n\n<li><strong>\u30af\u30ed\u30fc\u30b8\u30e3<\/strong>\uff1a\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u95a2\u6570<\/li>\n<\/ul>\n\n\n\n<p>PHP\u3067\u306f\u3053\u306e\u533a\u5225\u306f\u3042\u307e\u308a\u660e\u78ba\u3067\u306f\u306a\u304f\u3001\u7121\u540d\u95a2\u6570\u306f\u3059\u3079\u3066<code>Closure<\/code>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-124\">PHP\u3068JavaScript\u306e\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u9055\u3044<\/h4>\n\n\n\n<p>PHP\u3068JavaScript\u306e\u30af\u30ed\u30fc\u30b8\u30e3\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>PHP\u3067\u306f\u3001<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u660e\u793a\u7684\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u5909\u6570\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/li>\n\n\n\n<li>JavaScript\u3067\u306f\u3001\u95a2\u6570\u304c\u30b9\u30b3\u30fc\u30d7\u5185\u306e\u3059\u3079\u3066\u306e\u5909\u6570\u306b\u81ea\u52d5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>PHP\u3067\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5024\u6e21\u3057\uff08\u30b3\u30d4\u30fc\uff09\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u307e\u3059\u3002\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u306b\u306f<code>&amp;<\/code>\u3092\u4f7f\u7528\u3057\u307e\u3059<\/li>\n\n\n\n<li>JavaScript\u3067\u306f\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u5024\u306f\u5024\u6e21\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u53c2\u7167\u6e21\u3057\u306b\u306a\u308a\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><code>this<\/code>\u306e\u6271\u3044<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>PHP\u3067\u306f\u30af\u30e9\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u5916\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u3067\u306f<code>$this<\/code>\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093<\/li>\n\n\n\n<li>JavaScript\u3067\u306f<code>this<\/code>\u306f\u547c\u3073\u51fa\u3057\u5143\u306b\u3088\u3063\u3066\u52d5\u7684\u306b\u6c7a\u307e\u308a\u307e\u3059\uff08\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u9664\u304f\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-125\">\u5b9f\u8df5\u7684\u306a\u4f8b\uff1a\u30b7\u30f3\u30d7\u30eb\u306aDI\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u88c5<\/h4>\n\n\n\n<p>\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u7528\u3057\u305f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u4f9d\u5b58\u6027\u6ce8\u5165\uff08DI\uff09\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u307f\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=\"\">class Container {\n    private $services = [];\n    \n    public function register($name, $factory) {\n        $this-&gt;services[$name] = $factory;\n    }\n    \n    public function get($name) {\n        if (!isset($this-&gt;services[$name])) {\n            throw new Exception(\"\u30b5\u30fc\u30d3\u30b9 '$name' \u306f\u767b\u9332\u3055\u308c\u3066\u3044\u307e\u305b\u3093\");\n        }\n        \n        \/\/ \u30b5\u30fc\u30d3\u30b9\u304c\u30af\u30ed\u30fc\u30b8\u30e3\u306a\u3089\u3070\u5b9f\u884c\u3057\u3001\u7d50\u679c\u3092\u8fd4\u3059\n        $factory = $this-&gt;services[$name];\n        if ($factory instanceof Closure) {\n            return $factory($this);\n        }\n        \n        return $factory;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$container = new Container();\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u767b\u9332\n$container-&gt;register('database', function() {\n    $pdo = new PDO('mysql:host=localhost;dbname=testdb', 'user', 'password');\n    $pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n    return $pdo;\n});\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u767b\u9332\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306b\u4f9d\u5b58\uff09\n$container-&gt;register('userRepository', function($container) {\n    $db = $container-&gt;get('database');\n    return new UserRepository($db);\n});\n\n\/\/ \u30b5\u30fc\u30d3\u30b9\u3092\u53d6\u5f97\ntry {\n    $userRepo = $container-&gt;get('userRepository');\n    $users = $userRepo-&gt;findAll();\n} catch (Exception $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage();\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-126\">\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u306f\u3001PHP\u306e\u5f37\u529b\u304b\u3064\u67d4\u8edf\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u3067\u3059\u3002\u4e3b\u306a\u5229\u70b9\u306f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055<\/strong>\uff1a\u4e00\u5ea6\u3057\u304b\u4f7f\u7528\u3057\u306a\u3044\u95a2\u6570\u3092\u5225\u9014\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4fdd\u6301<\/strong>\uff1a\u5916\u90e8\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u304d\u308b\u305f\u3081\u3001\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u60c5\u5831\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u9ad8\u968e\u95a2\u6570<\/strong>\uff1a\u95a2\u6570\u3092\u5909\u6570\u3068\u3057\u3066\u6271\u3048\u308b\u305f\u3081\u3001\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30ab\u30d7\u30bb\u30eb\u5316<\/strong>\uff1a\u7279\u5b9a\u306e\u30b9\u30b3\u30fc\u30d7\u5185\u306e\u51e6\u7406\u3092\u96a0\u853d\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u52d5\u7684\u95a2\u6570\u751f\u6210<\/strong>\uff1a\u5b9f\u884c\u6642\u306b\u95a2\u6570\u3092\u52d5\u7684\u306b\u751f\u6210\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u9069\u5207\u306b\u4f7f\u7528\u3059\u308c\u3070\u3001\u7121\u540d\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u7279\u306b\u4fa1\u5024\u3092\u767a\u63ee\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/li>\n\n\n\n<li>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u3068\u30ea\u30b9\u30ca\u30fc<\/li>\n\n\n\n<li>\u4f9d\u5b58\u6027\u6ce8\u5165\u3068\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3<\/li>\n\n\n\n<li>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u691c\u8a3c\u30ed\u30b8\u30c3\u30af<\/li>\n<\/ul>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001\u7121\u540d\u95a2\u6570\u306e\u7c21\u6f54\u306a\u4ee3\u66ff\u624b\u6bb5\u3068\u3057\u3066\u3001\u7279\u306b\u77ed\u3044\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u66f8\u304f\u969b\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002php $variableName = function(\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8) use (\u5916\u90e8\u5909\u6570\u30ea\u30b9\u30c8) { \/\/ \u95a2\u6570\u306e\u51e6\u7406 return \u623b\u308a\u5024; };<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u4f8b\u3048\u3070\u3001\u7c21\u5358\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8fd4\u3059\u7121\u540d\u95a2\u6570\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a\n\n```php\n$greet = function($name) {\n    return \"\u3053\u3093\u306b\u3061\u306f\u3001$name \u3055\u3093\uff01\";\n};\n\n\/\/ \u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\necho $greet(\"\u5c71\u7530\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u5c71\u7530 \u3055\u3093\uff01\n<\/pre>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306f\u5909\u6570\u306b\u4ee3\u5165\u3055\u308c\u308b\u305f\u3081\u3001\u95a2\u6570\u81ea\u4f53\u3092\u5909\u6570\u306e\u3088\u3046\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5225\u306e\u5909\u6570\u306b\u4ee3\u5165\n$sayHello = $greet;\necho $sayHello(\"\u4f50\u85e4\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u4f50\u85e4 \u3055\u3093\uff01\n\n\/\/ \u95a2\u6570\u3092\u683c\u7d0d\u3057\u305f\u914d\u5217\n$messages = [\n    \"welcome\" =&gt; function($name) { return \"\u3088\u3046\u3053\u305d\u3001$name \u3055\u3093\uff01\"; },\n    \"goodbye\" =&gt; function($name) { return \"\u3055\u3088\u3046\u306a\u3089\u3001$name \u3055\u3093\uff01\"; }\n];\n\necho $messages[\"welcome\"](\"\u9234\u6728\"); \/\/ \u51fa\u529b: \u3088\u3046\u3053\u305d\u3001\u9234\u6728 \u3055\u3093\uff01\necho $messages[\"goodbye\"](\"\u7530\u4e2d\"); \/\/ \u51fa\u529b: \u3055\u3088\u3046\u306a\u3089\u3001\u7530\u4e2d \u3055\u3093\uff01\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-127\">use\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u308b\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306e\u5927\u304d\u306a\u7279\u5fb4\u306f\u3001<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u300c\u30ad\u30e3\u30d7\u30c1\u30e3\u300d\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u60c5\u5831\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$prefix = \"\u3053\u3093\u306b\u3061\u306f\u3001\";\n\n$greet = function($name) use ($prefix) {\n    return $prefix . $name . \" \u3055\u3093\uff01\";\n};\n\necho $greet(\"\u9ad8\u6a4b\"); \/\/ \u51fa\u529b: \u3053\u3093\u306b\u3061\u306f\u3001\u9ad8\u6a4b \u3055\u3093\uff01\n<\/pre>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u305f\u5909\u6570\u306f\u5024\u6e21\u3057\uff08\u30b3\u30d4\u30fc\uff09\u3055\u308c\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u5143\u306e\u5909\u6570\u3092\u5909\u66f4\u3057\u3066\u3082\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u306e\u5024\u306f\u5909\u308f\u308a\u307e\u305b\u3093\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$message = \"Hello\";\n\n$greet = function($name) use ($message) {\n    return \"$message, $name!\";\n};\n\n$message = \"Hi\"; \/\/ \u5143\u306e\u5909\u6570\u3092\u5909\u66f4\n\necho $greet(\"John\"); \/\/ \u51fa\u529b: Hello, John! (\u5143\u306e\u5024\u304c\u4f7f\u7528\u3055\u308c\u308b)\n<\/pre>\n\n\n\n<p>\u3082\u3057\u5916\u90e8\u5909\u6570\u306e\u5909\u66f4\u3092\u30af\u30ed\u30fc\u30b8\u30e3\u5185\u306b\u53cd\u6620\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u3001\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$counter = 0;\n\n$increment = function() use (&amp;$counter) {\n    $counter++;\n    return $counter;\n};\n\necho $increment(); \/\/ \u51fa\u529b: 1\necho $increment(); \/\/ \u51fa\u529b: 2\necho $counter;     \/\/ \u51fa\u529b: 2 (\u5916\u90e8\u5909\u6570\u3082\u5909\u66f4\u3055\u308c\u3066\u3044\u308b)\n<\/pre>\n\n\n\n<p>\u8907\u6570\u306e\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$firstName = \"\u592a\u90ce\";\n$lastName = \"\u5c71\u7530\";\n\n$getFullName = function() use ($firstName, $lastName) {\n    return $lastName . \" \" . $firstName;\n};\n\necho $getFullName(); \/\/ \u51fa\u529b: \u5c71\u7530 \u592a\u90ce\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-128\">\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h4>\n\n\n\n<p>\u7121\u540d\u95a2\u6570\u306f\u591a\u304f\u306e\u5b9f\u8df5\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-129\">1. \u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/h5>\n\n\n\n<p>PHP\u306e\u914d\u5217\u95a2\u6570\uff08<code>array_map<\/code>\u3001<code>array_filter<\/code>\u3001<code>array_reduce<\/code>\u306a\u3069\uff09\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u304c\u975e\u5e38\u306b\u7c21\u6f54\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u64cd\u4f5c\u3092\u884c\u3046\n$numbers = [1, 2, 3, 4, 5];\n$doubled = array_map(function($number) {\n    return $number * 2;\n}, $numbers);\n\nprint_r($doubled); \/\/ [2, 4, 6, 8, 10]\n\n\/\/ \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$evenNumbers = array_filter($numbers, function($number) {\n    return $number % 2 === 0;\n});\n\nprint_r($evenNumbers); \/\/ [2, 4]\n\n\/\/ \u914d\u5217\u306e\u8981\u7d20\u3092\u96c6\u7d04\n$sum = array_reduce($numbers, function($carry, $number) {\n    return $carry + $number;\n}, 0);\n\necho $sum; \/\/ \u51fa\u529b: 15\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-130\">\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3088\u308b\u30b3\u30fc\u30c9\u306e\u7c21\u7565\u5316<\/h3>\n\n\n\n<p>PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u95a2\u6570\uff08Arrow Functions\uff09\u306f\u3001\u7121\u540d\u95a2\u6570\u3092\u3088\u308a\u7c21\u6f54\u306b\u66f8\u304f\u305f\u3081\u306e\u69cb\u6587\u3067\u3059\u3002\u7279\u306b\u77ed\u3044\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3084\u30b7\u30f3\u30d7\u30eb\u306a\u51e6\u7406\u3092\u884c\u3046\u95a2\u6570\u3092\u8a18\u8ff0\u3059\u308b\u969b\u306b\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u7c21\u6f54\u3055\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-131\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\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=\"\">fn(\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8) =&gt; \u5f0f;\n<\/pre>\n\n\n\n<p>\u3053\u306e\u69cb\u6587\u306f\u3001JavaScript\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001PHP\u3067\u306f<code>fn<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u70b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u3068\u6bd4\u8f03\u3057\u3066\u307f\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=\"\">\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\n$square = function($x) {\n    return $x * $x;\n};\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\n$square = fn($x) =&gt; $x * $x;\n\necho $square(5); \/\/ \u51fa\u529b: 25\n<\/pre>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u4e3b\u306a\u7279\u5fb4\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5358\u4e00\u306e\u5f0f<\/strong>\uff1a\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u5e38\u306b\u5358\u4e00\u306e\u5f0f\u306e\u307f\u3092\u542b\u307f\u307e\u3059\u3002\u3053\u306e\u5f0f\u306e\u7d50\u679c\u304c\u81ea\u52d5\u7684\u306b\u8fd4\u3055\u308c\u307e\u3059\uff08<code>return<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4e0d\u8981\uff09\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u52d5\u7684\u306a\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong>\uff1a\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u81ea\u52d5\u7684\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u307e\u3059\uff08<code>use<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4e0d\u8981\uff09\u3002<\/li>\n\n\n\n<li><strong>\u7c21\u6f54\u306a\u69cb\u6587<\/strong>\uff1a\u4e2d\u62ec\u5f27<code>{}<\/code>\u3084\u30bb\u30df\u30b3\u30ed\u30f3<code>;<\/code>\u3092\u542b\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-132\">\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5927\u304d\u306a\u5229\u70b9\u306e\u4e00\u3064\u306f\u3001\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u81ea\u52d5\u7684\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u70b9\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$factor = 10;\n\n\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\n$multiply = function($x) use ($factor) {\n    return $x * $factor;\n};\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\n$multiply = fn($x) =&gt; $x * $factor;\n\necho $multiply(5); \/\/ \u51fa\u529b: 50\n<\/pre>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u3059\u3079\u3066\u306e\u5909\u6570\u306b\u81ea\u52d5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u304c\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u3001\u5909\u6570\u3092\u660e\u793a\u7684\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u5fd8\u308c\u308b\u30ea\u30b9\u30af\u3082\u6e1b\u5c11\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-133\">\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3\u306e\u8a73\u7d30<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u306e\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5024\u6e21\u3057\u306e\u307f<\/strong>\uff1a\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u5e38\u306b\u5024\u6e21\u3057\u3067\u306e\u307f\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u307e\u3059\u3002\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$counter = 0;\n\n\/\/ \u3053\u308c\u306f\u52d5\u4f5c\u3057\u306a\u3044\uff08\u5024\u6e21\u3057\u306e\u307f\uff09\n$increment = fn() =&gt; $counter++;\n\n$increment();\necho $counter; \/\/ \u51fa\u529b: 0\uff08\u5909\u66f4\u3055\u308c\u3066\u3044\u306a\u3044\uff09\n\n\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u3067\u306f\u53c2\u7167\u6e21\u3057\u304c\u53ef\u80fd\n$increment = function() use (&amp;$counter) {\n    $counter++;\n};\n\n$increment();\necho $counter; \/\/ \u51fa\u529b: 1\uff08\u5909\u66f4\u3055\u308c\u3066\u3044\u308b\uff09\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08\u4e0d\u5909\uff09\u306a\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong>\uff1a\u30a2\u30ed\u30fc\u95a2\u6570\u5185\u3067\u5916\u90e8\u5909\u6570\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-134\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5236\u9650\u4e8b\u9805<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u306f\u4ee5\u4e0b\u306e\u5236\u9650\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5358\u4e00\u306e\u5f0f\u306e\u307f<\/strong>\uff1a\u8907\u6570\u306e\u6587\u3084\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u3092\u542b\u3080\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u3053\u308c\u306f\u4e0d\u53ef\u80fd\uff08\u8907\u6570\u306e\u6587\uff09\n$process = fn($x) =&gt; {\n    $temp = $x * 2;\n    return $temp + 1;\n};\n\n\/\/ \u4ee3\u308f\u308a\u306b\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u3092\u4f7f\u7528\n$process = function($x) {\n    $temp = $x * 2;\n    return $temp + 1;\n};\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u53c2\u7167\u306b\u3088\u308b\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3\u4e0d\u53ef<\/strong>\uff1a\u524d\u8ff0\u306e\u3068\u304a\u308a\u3001\u5909\u6570\u306f\u5e38\u306b\u5024\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u53ef\u5909\u9577\u5f15\u6570\u306e\u5236\u9650<\/strong>\uff1a\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u3082\u53ef\u5909\u9577\u5f15\u6570\uff08<code>...<\/code>\u6f14\u7b97\u5b50\uff09\u306f\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u5236\u7d04\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong><code>return<\/code>\u6587\u306f\u4f7f\u7528\u4e0d\u53ef<\/strong>\uff1a\u5f0f\u306e\u7d50\u679c\u304c\u81ea\u52d5\u7684\u306b\u8fd4\u3055\u308c\u308b\u305f\u3081\u3001<code>return<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-135\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5b9f\u8df5\u7684\u306a\u4f8b<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u7279\u306b\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3068\u3057\u3066\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\uff1a<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-136\">1. array_map \u3067\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u5909\u63db<\/h5>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$numbers = [1, 2, 3, 4, 5];\n\n\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\n$squared1 = array_map(function($n) {\n    return $n * $n;\n}, $numbers);\n\n\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\n$squared2 = array_map(fn($n) =&gt; $n * $n, $numbers);\n\nprint_r($squared2); \/\/ [1, 4, 9, 16, 25]\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-137\">2. array_filter \u3067\u306e\u6761\u4ef6\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/h5>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$users = [\n    ['name' =&gt; '\u5c71\u7530', 'age' =&gt; 30, 'active' =&gt; true],\n    ['name' =&gt; '\u4f50\u85e4', 'age' =&gt; 25, 'active' =&gt; false],\n    ['name' =&gt; '\u9234\u6728', 'age' =&gt; 35, 'active' =&gt; true],\n    ['name' =&gt; '\u9ad8\u6a4b', 'age' =&gt; 28, 'active' =&gt; false],\n];\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u306e\u307f\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$activeUsers = array_filter($users, fn($user) =&gt; $user['active']);\n\n\/\/ 30\u6b73\u4ee5\u4e0a\u306e\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$seniorActiveUsers = array_filter(\n    $users, \n    fn($user) =&gt; $user['active'] &amp;&amp; $user['age'] &gt;= 30\n);\n\nprint_r($seniorActiveUsers);\n\/* \u51fa\u529b:\nArray (\n    [0] =&gt; Array (\n        [name] =&gt; \u5c71\u7530\n        [age] =&gt; 30\n        [active] =&gt; 1\n    )\n    [2] =&gt; Array (\n        [name] =&gt; \u9234\u6728\n        [age] =&gt; 35\n        [active] =&gt; 1\n    )\n)\n*\/\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-138\">3. usort \u3067\u306e\u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8<\/h5>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$products = [\n    ['name' =&gt; '\u30ce\u30fc\u30c8PC', 'price' =&gt; 89800, 'stock' =&gt; 5],\n    ['name' =&gt; '\u30de\u30a6\u30b9', 'price' =&gt; 3500, 'stock' =&gt; 20],\n    ['name' =&gt; '\u30ad\u30fc\u30dc\u30fc\u30c9', 'price' =&gt; 6800, 'stock' =&gt; 8],\n    ['name' =&gt; '\u30e2\u30cb\u30bf\u30fc', 'price' =&gt; 34800, 'stock' =&gt; 0],\n];\n\n\/\/ \u5728\u5eab\u306e\u3042\u308b\u5546\u54c1\u3092\u512a\u5148\u3057\u3001\u305d\u306e\u5f8c\u4fa1\u683c\u304c\u4f4e\u3044\u9806\u306b\u30bd\u30fc\u30c8\nusort($products, fn($a, $b) =&gt; \n    \/\/ \u7247\u65b9\u3060\u3051\u5728\u5eab\u304c\u3042\u308b\u5834\u5408\u3001\u5728\u5eab\u3042\u308a\u3092\u512a\u5148\n    ($a['stock'] &gt; 0 &amp;&amp; $b['stock'] &lt;= 0) ? -1 : \n    ($a['stock'] &lt;= 0 &amp;&amp; $b['stock'] &gt; 0) ? 1 : \n    \/\/ \u4e21\u65b9\u3068\u3082\u5728\u5eab\u3042\u308a\/\u306a\u3057\u306a\u3089\u4fa1\u683c\u3067\u30bd\u30fc\u30c8\n    $a['price'] &lt;=&gt; $b['price']\n);\n\nforeach ($products as $product) {\n    echo \"{$product['name']} - {$product['price']}\u5186 (\u5728\u5eab: {$product['stock']})\\n\";\n}\n\/* \u51fa\u529b:\n\u30de\u30a6\u30b9 - 3500\u5186 (\u5728\u5eab: 20)\n\u30ad\u30fc\u30dc\u30fc\u30c9 - 6800\u5186 (\u5728\u5eab: 8)\n\u30ce\u30fc\u30c8PC - 89800\u5186 (\u5728\u5eab: 5)\n\u30e2\u30cb\u30bf\u30fc - 34800\u5186 (\u5728\u5eab: 0)\n*\/\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-139\">4. \u914d\u5217\u64cd\u4f5c\u306e\u9023\u9396<\/h5>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001\u8907\u6570\u306e\u914d\u5217\u64cd\u4f5c\u3092\u9023\u9396\u3055\u305b\u308b\u5834\u5408\u306b\u3082\u975e\u5e38\u306b\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\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=\"\">$result = array_map(\n    fn($item) =&gt; $item['name'],\n    array_filter(\n        $products,\n        fn($p) =&gt; $p['price'] &lt; 10000 &amp;&amp; $p['stock'] &gt; 0\n    )\n);\n\nprint_r($result); \/\/ ['\u30de\u30a6\u30b9', '\u30ad\u30fc\u30dc\u30fc\u30c9']\n<\/pre>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-140\">5. \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5185\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u30a2\u30af\u30bb\u30b9<\/h5>\n\n\n\n<pre 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 User {\n    public $name;\n    public $email;\n    \n    public function __construct($name, $email) {\n        $this-&gt;name = $name;\n        $this-&gt;email = $email;\n    }\n}\n\n$users = [\n    new User('\u7530\u4e2d', 'tanaka@example.com'),\n    new User('\u4f50\u85e4', 'sato@example.com'),\n    new User('\u9234\u6728', 'suzuki@example.com')\n];\n\n\/\/ \u5168\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\n$emails = array_map(fn($user) =&gt; $user-&gt;email, $users);\nprint_r($emails);\n\/\/ ['tanaka@example.com', 'sato@example.com', 'suzuki@example.com']\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-141\">\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u30cd\u30b9\u30c8<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u4ed6\u306e\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u4e2d\u306b\u30cd\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [1, 2, 3, 4, 5];\n\n\/\/ \u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u3001\u305d\u306e\u5024\u304c\u5947\u6570\u304b\u5076\u6570\u304b\u3092\u5224\u5b9a\u3059\u308b\u95a2\u6570\u3092\u8fd4\u3059\u95a2\u6570\n$makeChecker = fn($type) =&gt; \n    $type === 'even' \n        ? fn($n) =&gt; $n % 2 === 0 \n        : fn($n) =&gt; $n % 2 !== 0;\n\n$evenChecker = $makeChecker('even');\n$oddChecker = $makeChecker('odd');\n\n$evens = array_filter($data, $evenChecker); \/\/ [2, 4]\n$odds = array_filter($data, $oddChecker); \/\/ [1, 3, 5]\n\nprint_r($evens); \/\/ [2, 4]\nprint_r($odds); \/\/ [1, 3, 5]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-142\">\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u540d\u524d\u4ed8\u304d\u5f15\u6570\u306e\u7d44\u307f\u5408\u308f\u305b\uff08PHP 8.0\u4ee5\u964d\uff09<\/h4>\n\n\n\n<p>PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305f\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u3055\u3089\u306b\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$formatName = fn($firstName, $lastName, $honorific = \"\") =&gt; \n    trim(\"$honorific $lastName $firstName\");\n\necho $formatName(\n    firstName: \"\u592a\u90ce\",\n    lastName: \"\u5c71\u7530\",\n    honorific: \"Mr.\"\n); \/\/ \u51fa\u529b: Mr. \u5c71\u7530 \u592a\u90ce\n\necho $formatName(\n    firstName: \"\u82b1\u5b50\",\n    lastName: \"\u9234\u6728\"\n); \/\/ \u51fa\u529b: \u9234\u6728 \u82b1\u5b50\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-143\">\u30a2\u30ed\u30fc\u95a2\u6570 vs \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\uff1a\u4f7f\u3044\u5206\u3051\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u306e\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u306f\u3001\u72b6\u6cc1\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<p><strong>\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u3046\u3079\u304d\u5834\u5408<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u5f0f\u3092\u8fd4\u3059\u7c21\u5358\u306a\u95a2\u6570\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3057\u305f\u3044\u5834\u5408<\/li>\n\n\n\n<li>\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\uff08<code>array_map<\/code>\u3001<code>array_filter<\/code>\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u5916\u90e8\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\u3060\u304c\u3001\u305d\u308c\u3089\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<p><strong>\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u3092\u4f7f\u3046\u3079\u304d\u5834\u5408<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u6587\u3084\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u6761\u4ef6\u5206\u5c90\u3084\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u5916\u90e8\u5909\u6570\u3092\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3001\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3084\u4f8b\u5916\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u4e00\u6642\u7684\u306b\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u4f7f\u7528\u4f8b\u3067\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=\"\">\/\/ \u30a2\u30ed\u30fc\u95a2\u6570\u304c\u9069\u3057\u3066\u3044\u308b\u4f8b\n$numbers = [1, 2, 3, 4, 5];\n$doubled = array_map(fn($n) =&gt; $n * 2, $numbers);\n$sum = array_reduce($numbers, fn($carry, $n) =&gt; $carry + $n, 0);\n\n\/\/ \u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u304c\u9069\u3057\u3066\u3044\u308b\u4f8b\n$processData = function($data) {\n    $result = [];\n    foreach ($data as $item) {\n        try {\n            $processed = someProcessingFunction($item);\n            if ($processed !== null) {\n                $result[] = $processed;\n            }\n        } catch (Exception $e) {\n            error_log(\"\u51e6\u7406\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        }\n    }\n    return $result;\n};\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-144\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e\u4e8b\u9805<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5dee\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u5185\u90e8\u7684\u306b\u306f\u901a\u5e38\u306e\u7121\u540d\u95a2\u6570\u306b\u5909\u63db\u3055\u308c\u308b\u305f\u3081\u3001\u5b9f\u884c\u6642\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u57fa\u672c\u7684\u306b\u540c\u3058\u3067\u3059\u3002\u9078\u629e\u306f\u4e3b\u306b\u53ef\u8aad\u6027\u3068\u66f8\u304d\u3084\u3059\u3055\u306b\u57fa\u3065\u3044\u3066\u884c\u3046\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-145\">\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u3001PHP 7.4\u3067\u5c0e\u5165\u3055\u308c\u305f\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3001\u7279\u306b\u5358\u4e00\u306e\u5f0f\u3092\u8fd4\u3059\u77ed\u3044\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u66f8\u304f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u5927\u5e45\u306b\u7c21\u7565\u5316\u3067\u304d\u307e\u3059\u3002\u4e3b\u306a\u7279\u5fb4\u3068\u5229\u70b9\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7c21\u6f54\u306a\u69cb\u6587<\/strong>\uff1a\u5c11\u306a\u3044\u30b3\u30fc\u30c9\u884c\u3067\u95a2\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u52d5\u5909\u6570\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong>\uff1a\u5916\u90e8\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u306b\u81ea\u52d5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u8aad\u307f\u3084\u3059\u3055\u306e\u5411\u4e0a<\/strong>\uff1a\u7279\u306b\u914d\u5217\u64cd\u4f5c\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u610f\u56f3\u306e\u660e\u78ba\u5316<\/strong>\uff1a\u5358\u4e00\u306e\u5f0f\u3060\u3051\u3092\u542b\u3080\u95a2\u6570\u3067\u3042\u308b\u3053\u3068\u304c\u69cb\u6587\u304b\u3089\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5236\u9650\u306f\u3042\u308a\u307e\u3059\u304c\uff08\u5358\u4e00\u5f0f\u306e\u307f\u3001\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\u4e0d\u53ef\u306a\u3069\uff09\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306fPHP\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306e\u7d20\u6674\u3089\u3057\u3044\u30c4\u30fc\u30eb\u3067\u3059\u3002\u7279\u306b\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3084\u3001\u914d\u5217\u64cd\u4f5c\u3092\u591a\u7528\u3059\u308b\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u6069\u6075\u3092\u5927\u304d\u304f\u53d7\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-146\">\u518d\u5e30\u95a2\u6570\u306e\u7406\u89e3\u3068\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u518d\u5e30\u95a2\u6570\uff08recursive function\uff09\u306f\u3001\u81ea\u5206\u81ea\u8eab\u3092\u547c\u3073\u51fa\u3059\u95a2\u6570\u306e\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u554f\u984c\u3092\u3088\u308a\u5c0f\u3055\u306a\u540c\u3058\u554f\u984c\u306b\u5206\u89e3\u3057\u3066\u89e3\u6c7a\u3059\u308b\u3068\u3044\u3046\u5f37\u529b\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u6280\u6cd5\u306e\u57fa\u790e\u3068\u306a\u308a\u307e\u3059\u3002PHP\u3067\u306f\u3001\u518d\u5e30\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306e\u30a8\u30ec\u30ac\u30f3\u30c8\u3067\u76f4\u611f\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-147\">\u518d\u5e30\u306e\u57fa\u672c\u6982\u5ff5<\/h4>\n\n\n\n<p>\u518d\u5e30\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u6838\u5fc3\u306f\u3001\u5927\u304d\u306a\u554f\u984c\u3092\u540c\u3058\u5f62\u5f0f\u306e\u5c0f\u3055\u306a\u554f\u984c\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002\u518d\u5e30\u95a2\u6570\u306f\u3001\u6b21\u306e2\u3064\u306e\u91cd\u8981\u306a\u8981\u7d20\u304b\u3089\u69cb\u6210\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u5e95\u30b1\u30fc\u30b9\uff08Base Case\uff09<\/strong>: \u518d\u5e30\u306e\u505c\u6b62\u6761\u4ef6\u3002\u3053\u308c\u4ee5\u4e0a\u5206\u89e3\u3067\u304d\u306a\u3044\u6700\u5c0f\u306e\u554f\u984c\u3067\u3001\u76f4\u63a5\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u518d\u5e30\u30b1\u30fc\u30b9\uff08Recursive Case\uff09<\/strong>: \u554f\u984c\u3092\u3088\u308a\u5c0f\u3055\u306a\u554f\u984c\u306b\u5206\u89e3\u3057\u3001\u81ea\u5206\u81ea\u8eab\u3092\u547c\u3073\u51fa\u3059\u90e8\u5206\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u8981\u7d20\u304c\u9069\u5207\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u95a2\u6570\u306f\u6c38\u9060\u306b\u81ea\u5206\u81ea\u8eab\u3092\u547c\u3073\u51fa\u3057\u7d9a\u3051\u3001\u6700\u7d42\u7684\u306b\u306f\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-148\">\u518d\u5e30\u95a2\u6570\u306e\u57fa\u672c\u4f8b: \u968e\u4e57\u306e\u8a08\u7b97<\/h4>\n\n\n\n<p>\u968e\u4e57\u306f\u518d\u5e30\u3092\u8aac\u660e\u3059\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u4f8b\u306e\u4e00\u3064\u3067\u3059\u3002\u6570\u5b66\u7684\u306b\u3001n!\uff08n\u306e\u968e\u4e57\uff09\u306f\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0! = 1<\/li>\n\n\n\n<li>n! = n \u00d7 (n-1)! \uff08n &gt; 0\u306e\u5834\u5408\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3092\u518d\u5e30\u95a2\u6570\u3068\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3068\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=\"\">function factorial($n) {\n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9: 0\u307e\u305f\u306f1\u306e\u968e\u4e57\u306f1\n    if ($n &lt;= 1) {\n        return 1;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9: n! = n * (n-1)!\n    return $n * factorial($n - 1);\n}\n\necho factorial(5); \/\/ \u51fa\u529b: 120 (5 * 4 * 3 * 2 * 1)\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306e\u5b9f\u884c\u30d5\u30ed\u30fc\u3092\u8ffd\u8de1\u3059\u308b\u3068\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=\"\">factorial(5)\n= 5 * factorial(4)\n= 5 * (4 * factorial(3))\n= 5 * (4 * (3 * factorial(2)))\n= 5 * (4 * (3 * (2 * factorial(1))))\n= 5 * (4 * (3 * (2 * 1)))\n= 5 * (4 * (3 * 2))\n= 5 * (4 * 6)\n= 5 * 24\n= 120\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-149\">\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217<\/h4>\n\n\n\n<p>\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306f\u3001\u5404\u6570\u304c\u524d\u306e2\u3064\u306e\u6570\u306e\u548c\u3067\u3042\u308b\u6570\u5217\u3067\u3059\uff1a0, 1, 1, 2, 3, 5, 8, 13, \u2026<\/p>\n\n\n\n<p>\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\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=\"\">function fibonacci($n) {\n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9\n    if ($n == 0) {\n        return 0;\n    } elseif ($n == 1) {\n        return 1;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9: F(n) = F(n-1) + F(n-2)\n    return fibonacci($n - 1) + fibonacci($n - 2);\n}\n\n\/\/ \u6700\u521d\u306e10\u500b\u306e\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u3092\u8868\u793a\nfor ($i = 0; $i &lt; 10; $i++) {\n    echo fibonacci($i) . \" \"; \/\/ \u51fa\u529b: 0 1 1 2 3 5 8 13 21 34\n}\n<\/pre>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u3053\u306e\u5b9f\u88c5\u306f\u975e\u52b9\u7387\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<code>fibonacci(5)<\/code>\u3092\u8a08\u7b97\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u591a\u304f\u306e\u91cd\u8907\u3057\u305f\u8a08\u7b97\u304c\u884c\u308f\u308c\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=\"\">fibonacci(5)\n= fibonacci(4) + fibonacci(3)\n= (fibonacci(3) + fibonacci(2)) + (fibonacci(2) + fibonacci(1))\n= ((fibonacci(2) + fibonacci(1)) + (fibonacci(1) + fibonacci(0))) + ((fibonacci(1) + fibonacci(0)) + fibonacci(1))\n...\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-150\">\u30e1\u30e2\u5316\u306b\u3088\u308b\u518d\u5e30\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u518d\u5e30\u306e\u5927\u304d\u306a\u554f\u984c\u306e\u4e00\u3064\u306f\u3001\u540c\u3058\u5f15\u6570\u3067\u306e\u95a2\u6570\u547c\u3073\u51fa\u3057\u304c\u7e70\u308a\u8fd4\u3057\u884c\u308f\u308c\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u300c\u30e1\u30e2\u5316\uff08memoization\uff09\u300d\u3068\u3044\u3046\u6280\u8853\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4ee5\u524d\u306e\u8a08\u7b97\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u304a\u304d\u3001\u540c\u3058\u5f15\u6570\u3067\u306e\u518d\u8a08\u7b97\u3092\u907f\u3051\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u4f8b\u3092\u30e1\u30e2\u5316\u3067\u6539\u5584\u3057\u3066\u307f\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=\"\">function fibonacciMemoized($n, &amp;$memo = []) {\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u7d50\u679c\u304c\u3042\u308c\u3070\u305d\u308c\u3092\u8fd4\u3059\n    if (isset($memo[$n])) {\n        return $memo[$n];\n    }\n    \n    \/\/ \u57fa\u5e95\u30b1\u30fc\u30b9\n    if ($n == 0) {\n        return 0;\n    } elseif ($n == 1) {\n        return 1;\n    }\n    \n    \/\/ \u518d\u5e30\u30b1\u30fc\u30b9: \u7d50\u679c\u3092\u8a08\u7b97\u3057\u3066\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\n    $memo[$n] = fibonacciMemoized($n - 1, $memo) + fibonacciMemoized($n - 2, $memo);\n    return $memo[$n];\n}\n\n\/\/ \u5927\u304d\u306a\u5024\u3067\u3082\u3059\u3050\u306b\u8a08\u7b97\u3067\u304d\u308b\necho fibonacciMemoized(30); \/\/ \u51fa\u529b: 832040\n<\/pre>\n\n\n\n<p>\u30e1\u30e2\u5316\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6642\u9593\u8a08\u7b97\u91cf\u3092\u6307\u6570\u95a2\u6570\u7684\uff08O(2^n)\uff09\u304b\u3089\u7dda\u5f62\uff08O(n)\uff09\u306b\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5927\u304d\u306a\u5165\u529b\u5024\u306b\u5bfe\u3057\u3066\u3082\u52b9\u7387\u7684\u306b\u52d5\u4f5c\u3059\u308b\u305f\u3081\u306b\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-151\">\u5b9f\u7528\u7684\u306a\u518d\u5e30\u306e\u4f8b: \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u8d70\u67fb<\/h4>\n\n\n\n<p>\u518d\u5e30\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u3088\u3046\u306a\u30c4\u30ea\u30fc\u69cb\u9020\u3092\u6271\u3046\u5834\u5408\u306b\u7279\u306b\u6709\u7528\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u305d\u306e\u4e2d\u306e\u3059\u3079\u3066\u306e\u30b5\u30d6\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u518d\u5e30\u7684\u306b\u8d70\u67fb\u3059\u308b\u95a2\u6570\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=\"\">function listDirectoryContents($dir, $indent = '') {\n    $files = scandir($dir);\n    \n    foreach ($files as $file) {\n        \/\/ \u7279\u6b8a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30b9\u30ad\u30c3\u30d7\n        if ($file === '.' || $file === '..') {\n            continue;\n        }\n        \n        $path = $dir . DIRECTORY_SEPARATOR . $file;\n        \n        if (is_dir($path)) {\n            \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5834\u5408\u306f\u540d\u524d\u3092\u8868\u793a\u3057\u3066\u518d\u5e30\u7684\u306b\u4e2d\u8eab\u3092\u8d70\u67fb\n            echo $indent . \"\ud83d\udcc1 \" . $file . \"\\n\";\n            listDirectoryContents($path, $indent . '  ');\n        } else {\n            \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u5834\u5408\u306f\u540d\u524d\u3092\u8868\u793a\n            echo $indent . \"\ud83d\udcc4 \" . $file . \"\\n\";\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nlistDirectoryContents('\/path\/to\/directory');\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306e\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u30d5\u30a9\u30eb\u30c0\u3092\u968e\u5c64\u7684\u306b\u8868\u793a\u3057\u307e\u3059\u3002\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u9020\u3092\u7c21\u5358\u306b\u51e6\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-152\">\u968e\u5c64\u30c7\u30fc\u30bf\u306e\u51e6\u7406: \u30ab\u30c6\u30b4\u30ea\u30c4\u30ea\u30fc\u306e\u8868\u793a<\/h4>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30ab\u30c6\u30b4\u30ea\u306e\u3088\u3046\u306a\u968e\u5c64\u30c7\u30fc\u30bf\u3092\u6271\u3046\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u518d\u5e30\u3092\u4f7f\u7528\u3057\u3066\u3001\u968e\u5c64\u7684\u306a\u30ab\u30c6\u30b4\u30ea\u30c4\u30ea\u30fc\u3092\u8868\u793a\u3059\u308b\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function renderCategoryTree($categories, $parentId = 0, $level = 0) {\n    $html = '';\n    \n    \/\/ \u89aa\u30ab\u30c6\u30b4\u30eaID\u306b\u4e00\u81f4\u3059\u308b\u9805\u76ee\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n    $filteredCategories = array_filter($categories, function($category) use ($parentId) {\n        return $category['parent_id'] == $parentId;\n    });\n    \n    if (empty($filteredCategories)) {\n        return $html;\n    }\n    \n    $html .= '&lt;ul&gt;';\n    \n    foreach ($filteredCategories as $category) {\n        $html .= '&lt;li&gt;';\n        $html .= str_repeat('&amp;nbsp;&amp;nbsp;', $level) . $category['name'];\n        \n        \/\/ \u5b50\u30ab\u30c6\u30b4\u30ea\u3092\u518d\u5e30\u7684\u306b\u63cf\u753b\n        $childrenHtml = renderCategoryTree($categories, $category['id'], $level + 1);\n        if ($childrenHtml) {\n            $html .= $childrenHtml;\n        }\n        \n        $html .= '&lt;\/li&gt;';\n    }\n    \n    $html .= '&lt;\/ul&gt;';\n    \n    return $html;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$categories = [\n    ['id' =&gt; 1, 'name' =&gt; '\u96fb\u5b50\u6a5f\u5668', 'parent_id' =&gt; 0],\n    ['id' =&gt; 2, 'name' =&gt; '\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3', 'parent_id' =&gt; 1],\n    ['id' =&gt; 3, 'name' =&gt; '\u30ce\u30fc\u30c8PC', 'parent_id' =&gt; 1],\n    ['id' =&gt; 4, 'name' =&gt; '\u30a2\u30af\u30bb\u30b5\u30ea\u30fc', 'parent_id' =&gt; 0],\n    ['id' =&gt; 5, 'name' =&gt; '\u30b1\u30fc\u30b9', 'parent_id' =&gt; 2],\n    ['id' =&gt; 6, 'name' =&gt; '\u5145\u96fb\u5668', 'parent_id' =&gt; 2],\n    ['id' =&gt; 7, 'name' =&gt; '\u30e1\u30e2\u30ea', 'parent_id' =&gt; 3],\n];\n\necho renderCategoryTree($categories);\n<\/pre>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u968e\u5c64\u69cb\u9020\u3092\u6301\u3064HTML\u30ea\u30b9\u30c8\u304c\u751f\u6210\u3055\u308c\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=\"\">&lt;ul&gt;\n  &lt;li&gt;\u96fb\u5b50\u6a5f\u5668\n    &lt;ul&gt;\n      &lt;li&gt;\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\n        &lt;ul&gt;\n          &lt;li&gt;\u30b1\u30fc\u30b9&lt;\/li&gt;\n          &lt;li&gt;\u5145\u96fb\u5668&lt;\/li&gt;\n        &lt;\/ul&gt;\n      &lt;\/li&gt;\n      &lt;li&gt;\u30ce\u30fc\u30c8PC\n        &lt;ul&gt;\n          &lt;li&gt;\u30e1\u30e2\u30ea&lt;\/li&gt;\n        &lt;\/ul&gt;\n      &lt;\/li&gt;\n    &lt;\/ul&gt;\n  &lt;\/li&gt;\n  &lt;li&gt;\u30a2\u30af\u30bb\u30b5\u30ea\u30fc&lt;\/li&gt;\n&lt;\/ul&gt;\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-153\">\u518d\u5e30\u3068\u914d\u5217\u64cd\u4f5c: \u914d\u5217\u306e\u30d5\u30e9\u30c3\u30c8\u5316<\/h4>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u30921\u6b21\u5143\u914d\u5217\u306b\u5909\u63db\u3059\u308b\u300c\u30d5\u30e9\u30c3\u30c8\u5316\u300d\u306f\u3001\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u3067\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=\"\">function flattenArray(array $array): array {\n    $result = [];\n    \n    foreach ($array as $item) {\n        if (is_array($item)) {\n            \/\/ \u914d\u5217\u306e\u5834\u5408\u306f\u518d\u5e30\u7684\u306b\u30d5\u30e9\u30c3\u30c8\u5316\u3057\u3066\u7d50\u679c\u3092\u30de\u30fc\u30b8\n            $result = array_merge($result, flattenArray($item));\n        } else {\n            \/\/ \u914d\u5217\u3067\u306a\u3044\u5834\u5408\u306f\u305d\u306e\u307e\u307e\u8ffd\u52a0\n            $result[] = $item;\n        }\n    }\n    \n    return $result;\n}\n\n$nestedArray = [1, [2, [3, 4], 5], 6, [7, 8]];\n$flattened = flattenArray($nestedArray);\nprint_r($flattened); \/\/ [1, 2, 3, 4, 5, 6, 7, 8]\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-154\">\u518d\u5e30\u306e\u5236\u9650\u3068\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<p>\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u5236\u9650\u3068\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc<\/strong>\uff1a PHP\u306b\u306f\u518d\u5e30\u306e\u6df1\u3055\u306b\u5236\u9650\u304c\u3042\u308a\u307e\u3059\uff08\u901a\u5e38\u306f\u7d04100\u301c200\u30ec\u30d9\u30eb\uff09\u3002\u3053\u308c\u3092\u8d85\u3048\u308b\u3068\u300cMaximum function nesting level\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<br><code data-enlighter-language=\"generic\" class=\"EnlighterJSRAW\"><code>\/\/ \u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u4f8b<br> function infiniteRecursion($n) {<br>    echo $n . \" \";<br>    infiniteRecursion($n + 1); \/\/ \u505c\u6b62\u6761\u4ef6\u304c\u306a\u3044\uff01<br> }<\/code><br><br>\/\/ \u3053\u308c\u306f\u5b9f\u884c\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\uff01<br>\/\/ infiniteRecursion(1);<\/code><br>\u3053\u306e\u5236\u9650\u306f\u3001<code>php.ini<\/code>\u306e<code>xdebug.max_nesting_level<\/code>\uff08Xdebug\u304c\u6709\u52b9\u306a\u5834\u5408\uff09\u307e\u305f\u306f<code>max_execution_time<\/code>\u3067\u8abf\u6574\u3067\u304d\u307e\u3059\u304c\u3001\u6839\u672c\u7684\u306a\u89e3\u6c7a\u7b56\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n\n\n\n<li><strong>\u30e1\u30e2\u30ea\u6d88\u8cbb<\/strong>\uff1a \u518d\u5e30\u306f\u30e1\u30e2\u30ea\u3092\u5927\u91cf\u306b\u6d88\u8cbb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5404\u95a2\u6570\u547c\u3073\u51fa\u3057\u306f\u30b9\u30bf\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u3092\u4f5c\u6210\u3057\u3001\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5b9f\u884c\u6642\u9593<\/strong>\uff1a \u30e1\u30e2\u5316\u306a\u3069\u306e\u6700\u9069\u5316\u304c\u306a\u3044\u5834\u5408\u3001\u518d\u5e30\u306f\u975e\u5e38\u306b\u9045\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u6307\u6570\u95a2\u6570\u7684\u306a\u8907\u96d1\u3055\u3092\u6301\u3064\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u7121\u9650\u518d\u5e30<\/strong>\uff1a \u57fa\u5e95\u30b1\u30fc\u30b9\u304c\u9069\u5207\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u7121\u9650\u518d\u5e30\u304c\u767a\u751f\u3057\u3001\u6700\u7d42\u7684\u306b\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-155\">\u518d\u5e30\u304b\u3089\u53cd\u5fa9\u3078\u306e\u5909\u63db<\/h4>\n\n\n\n<p>\u518d\u5e30\u3088\u308a\u3082\u53cd\u5fa9\uff08\u30eb\u30fc\u30d7\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5c11\u306a\u304f\u3001\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u56de\u907f\u3067\u304d\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u591a\u304f\u306e\u518d\u5e30\u95a2\u6570\u306f\u53cd\u5fa9\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u968e\u4e57\u306e\u53cd\u5fa9\u30d0\u30fc\u30b8\u30e7\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=\"\">function factorialIterative($n) {\n    $result = 1;\n    for ($i = 2; $i &lt;= $n; $i++) {\n        $result *= $i;\n    }\n    return $result;\n}\n\necho factorialIterative(5); \/\/ \u51fa\u529b: 120\n<\/pre>\n\n\n\n<p>\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u306e\u53cd\u5fa9\u30d0\u30fc\u30b8\u30e7\u30f3\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function fibonacciIterative($n) {\n    if ($n &lt;= 1) {\n        return $n;\n    }\n    \n    $fib = [0, 1];\n    for ($i = 2; $i &lt;= $n; $i++) {\n        $fib[$i] = $fib[$i - 1] + $fib[$i - 2];\n    }\n    \n    return $fib[$n];\n}\n\necho fibonacciIterative(10); \/\/ \u51fa\u529b: 55\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-156\">\u6df1\u3044\u518d\u5e30\u3092\u5b89\u5168\u306b\u51e6\u7406\u3059\u308b: \u30c8\u30e9\u30f3\u30dd\u30ea\u30f3\u95a2\u6570<\/h4>\n\n\n\n<p>\u975e\u5e38\u306b\u6df1\u3044\u518d\u5e30\u3092\u6271\u3046\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u300c\u30c8\u30e9\u30f3\u30dd\u30ea\u30f3\uff08trampoline\uff09\u300d\u3068\u3044\u3046\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u518d\u5e30\u547c\u3073\u51fa\u3057\u3092\u76f4\u63a5\u884c\u3046\u306e\u3067\u306f\u306a\u304f\u3001\u6b21\u306b\u5b9f\u884c\u3059\u308b\u95a2\u6570\u3092\u8fd4\u3057\u3001\u305d\u308c\u3092\u30eb\u30fc\u30d7\u3067\u5b9f\u884c\u3059\u308b\u65b9\u6cd5\u3067\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=\"\">function trampoline($fn) {\n    return function(...$args) use($fn) {\n        $result = $fn(...$args);\n        \n        while (is_callable($result)) {\n            $result = $result();\n        }\n        \n        return $result;\n    };\n}\n\n\/\/ \u30c8\u30e9\u30f3\u30dd\u30ea\u30f3\u3092\u4f7f\u3063\u305f\u5b89\u5168\u306a\u968e\u4e57\u8a08\u7b97\n$factorial = trampoline(function($n, $acc = 1) {\n    if ($n &lt;= 1) {\n        return $acc;\n    }\n    \n    \/\/ \u76f4\u63a5\u518d\u5e30\u547c\u3073\u51fa\u3057\u3092\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u6b21\u306b\u547c\u3073\u51fa\u3059\u95a2\u6570\u3092\u8fd4\u3059\n    return function() use($n, $acc) {\n        return $factorial($n - 1, $n * $acc);\n    };\n});\n\n\/\/ \u975e\u5e38\u306b\u5927\u304d\u306a\u968e\u4e57\u3082\u8a08\u7b97\u53ef\u80fd\uff08PHP_INT\u306e\u5236\u9650\u5185\u3067\u3042\u308c\u3070\uff09\necho $factorial(100); \/\/ \u975e\u5e38\u306b\u5927\u304d\u306a\u6570\u306b\u306a\u308a\u307e\u3059\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-157\">\u307e\u3068\u3081: \u518d\u5e30\u95a2\u6570\u306e\u4f7f\u3044\u3069\u3053\u308d<\/h4>\n\n\n\n<p>\u518d\u5e30\u95a2\u6570\u306f\u7279\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u6709\u52b9\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u968e\u5c64\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u51e6\u7406<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c4\u30ea\u30fc<\/li>\n\n\n\n<li>XML\u3084JSON\u306e\u69cb\u9020\u5316\u30c7\u30fc\u30bf<\/li>\n\n\n\n<li>\u30ab\u30c6\u30b4\u30ea\u3084\u30e1\u30cb\u30e5\u30fc\u306e\u968e\u5c64\u69cb\u9020<\/li>\n\n\n\n<li>\u30c4\u30ea\u30fc\u3084\u30b0\u30e9\u30d5\u306e\u30c7\u30fc\u30bf\u69cb\u9020<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5206\u5272\u7d71\u6cbb\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u30de\u30fc\u30b8\u30bd\u30fc\u30c8<\/li>\n\n\n\n<li>\u30af\u30a4\u30c3\u30af\u30bd\u30fc\u30c8<\/li>\n\n\n\n<li>\u4e8c\u5206\u63a2\u7d22<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u81ea\u7136\u306b\u518d\u5e30\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u6301\u3064\u554f\u984c<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217<\/li>\n\n\n\n<li>\u968e\u4e57\u8a08\u7b97<\/li>\n\n\n\n<li>\u30cf\u30ce\u30a4\u306e\u5854<\/li>\n\n\n\n<li>\u7d44\u307f\u5408\u308f\u305b\u3084\u9806\u5217\u306e\u751f\u6210<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u518d\u5e30\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e38\u306b\u9069\u5207\u306a\u57fa\u5e95\u30b1\u30fc\u30b9\u3092\u5b9a\u7fa9\u3059\u308b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u30e1\u30e2\u5316\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u5165\u529b\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u5834\u5408\u306f\u53cd\u5fa9\u7248\u306e\u5b9f\u88c5\u3092\u691c\u8a0e\u3059\u308b<\/li>\n\n\n\n<li>\u518d\u5e30\u306e\u6df1\u3055\u3092\u76e3\u8996\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5236\u9650\u3092\u8a2d\u3051\u308b<\/li>\n\n\n\n<li>\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u30ea\u30b9\u30af\u3092\u8a8d\u8b58\u3057\u3001\u5bfe\u7b56\u3092\u8b1b\u3058\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u9069\u5207\u306b\u5b9f\u88c5\u3055\u308c\u305f\u518d\u5e30\u95a2\u6570\u306f\u3001\u8907\u96d1\u306a\u554f\u984c\u306b\u5bfe\u3057\u3066\u975e\u5e38\u306b\u8aad\u307f\u3084\u3059\u304f\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3057\u3084\u3059\u3044\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u518d\u5e30\u3068\u53cd\u5fa9\u306e\u3069\u3061\u3089\u304c\u9069\u3057\u3066\u3044\u308b\u304b\u3092\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-158\">PHP\u95a2\u6570\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<p>\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u306f\u3001\u95a2\u6570\u306e\u8a2d\u8a08\u3068\u5b9f\u88c5\u306b\u95a2\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7406\u89e3\u3057\u3001\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u95a2\u6570\u8a2d\u8a08\u306e\u57fa\u672c\u539f\u5247\u304b\u3089\u59cb\u3081\u3066\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d1\u30bf\u30fc\u30f3\u3001\u305d\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u3001PHP\u95a2\u6570\u306e\u54c1\u8cea\u5411\u4e0a\u306b\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-159\">\u95a2\u6570\u8a2d\u8a08\u306e\u539f\u5247: \u5358\u4e00\u8cac\u4efb\u306e\u6cd5\u5247<\/h3>\n\n\n\n<p>\u95a2\u6570\u8a2d\u8a08\u306e\u6700\u3082\u91cd\u8981\u306a\u539f\u5247\u306e\u4e00\u3064\u304c\u3001\u300c\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u300d\uff08Single Responsibility Principle\uff09\u3067\u3059\u3002\u3053\u306e\u539f\u5247\u306f\u3001\u300c\u95a2\u6570\u306f\u4e00\u3064\u306e\u3053\u3068\u3060\u3051\u3092\u884c\u3044\u3001\u305d\u308c\u3092\u6b63\u3057\u304f\u884c\u3046\u3079\u304d\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-160\">\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306e\u91cd\u8981\u6027<\/h4>\n\n\n\n<p>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u95a2\u6570\u306e\u76ee\u7684\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u304c\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u306e\u5bb9\u6613\u3055<\/strong>\uff1a\u5358\u4e00\u306e\u8cac\u4efb\u3092\u6301\u3064\u95a2\u6570\u306f\u3001\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f5c\u6210\u304c\u7c21\u5358\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u5c0f\u3055\u306a\u95a2\u6570\u306f\u4ed6\u306e\u5834\u6240\u3067\u518d\u5229\u7528\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u4e00\u3064\u306e\u5909\u66f4\u304c\u4ed6\u306e\u6a5f\u80fd\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-161\">\u60aa\u3044\u4f8b\u3068\u826f\u3044\u4f8b<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u9055\u53cd\u3057\u3066\u3044\u308b\u95a2\u6570\u306e\u4f8b\u3067\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=\"\">\/\/ \u60aa\u3044\u4f8b: \u8907\u6570\u306e\u8cac\u4efb\u3092\u6301\u3064\u95a2\u6570\nfunction processUserData($userData) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\n    if (empty($userData['name'])) {\n        throw new Exception(\"\u540d\u524d\u306f\u5fc5\u9808\u3067\u3059\");\n    }\n    if (!filter_var($userData['email'], FILTER_VALIDATE_EMAIL)) {\n        throw new Exception(\"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u7121\u52b9\u3067\u3059\");\n    }\n    \n    \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u4fdd\u5b58\n    $db = new PDO('mysql:host=localhost;dbname=testdb', 'username', 'password');\n    $stmt = $db-&gt;prepare(\"INSERT INTO users (name, email) VALUES (?, ?)\");\n    $stmt-&gt;execute([$userData['name'], $userData['email']]);\n    \n    \/\/ \u78ba\u8a8d\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\n    $subject = \"\u767b\u9332\u78ba\u8a8d\";\n    $message = \"\u3053\u3093\u306b\u3061\u306f\u3001{$userData['name']}\u3055\u3093\u3002\u767b\u9332\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002\";\n    mail($userData['email'], $subject, $message);\n    \n    return $db-&gt;lastInsertId();\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306f\u5c11\u306a\u304f\u3068\u30823\u3064\u306e\u8cac\u4efb\u3092\u6301\u3063\u3066\u3044\u307e\u3059\uff1a\u30c7\u30fc\u30bf\u691c\u8a3c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u3067\u3059\u3002\u3053\u308c\u3092\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u5f93\u3063\u3066\u5206\u5272\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u826f\u3044\u4f8b: \u8cac\u4efb\u3092\u5206\u5272\u3057\u305f\u95a2\u6570\u7fa4\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u691c\u8a3c\u306e\u307f\u3092\u62c5\u5f53\nfunction validateUserData($userData) {\n    $errors = [];\n    \n    if (empty($userData['name'])) {\n        $errors[] = \"\u540d\u524d\u306f\u5fc5\u9808\u3067\u3059\";\n    }\n    \n    if (!filter_var($userData['email'], FILTER_VALIDATE_EMAIL)) {\n        $errors[] = \"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u7121\u52b9\u3067\u3059\";\n    }\n    \n    return $errors;\n}\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u4fdd\u5b58\u306e\u307f\u3092\u62c5\u5f53\nfunction saveUserToDatabase($userData) {\n    $db = new PDO('mysql:host=localhost;dbname=testdb', 'username', 'password');\n    $stmt = $db-&gt;prepare(\"INSERT INTO users (name, email) VALUES (?, ?)\");\n    $stmt-&gt;execute([$userData['name'], $userData['email']]);\n    \n    return $db-&gt;lastInsertId();\n}\n\n\/\/ \u78ba\u8a8d\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u306e\u307f\u3092\u62c5\u5f53\nfunction sendConfirmationEmail($name, $email) {\n    $subject = \"\u767b\u9332\u78ba\u8a8d\";\n    $message = \"\u3053\u3093\u306b\u3061\u306f\u3001{$name}\u3055\u3093\u3002\u767b\u9332\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002\";\n    return mail($email, $subject, $message);\n}\n\n\/\/ \u3053\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\nfunction processUserData($userData) {\n    \/\/ \u691c\u8a3c\n    $errors = validateUserData($userData);\n    if (!empty($errors)) {\n        throw new Exception(implode(\", \", $errors));\n    }\n    \n    \/\/ \u4fdd\u5b58\n    $userId = saveUserToDatabase($userData);\n    \n    \/\/ \u30e1\u30fc\u30eb\u9001\u4fe1\n    sendConfirmationEmail($userData['name'], $userData['email']);\n    \n    return $userId;\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u5404\u95a2\u6570\u306f\u5358\u4e00\u306e\u8cac\u4efb\u3092\u6301\u3061\u3001\u72ec\u7acb\u3057\u3066\u30c6\u30b9\u30c8\u3084\u518d\u5229\u7528\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u5c06\u6765\u7684\u306b\u4f8b\u3048\u3070\u30e1\u30fc\u30eb\u9001\u4fe1\u306e\u65b9\u6cd5\u3060\u3051\u3092\u5909\u66f4\u3057\u305f\u3044\u5834\u5408\u3082\u3001<code>sendConfirmationEmail<\/code>\u95a2\u6570\u3060\u3051\u3092\u4fee\u6b63\u3059\u308c\u3070\u826f\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-162\">\u95a2\u6570\u306e\u9069\u5207\u306a\u5206\u5272\u3068\u7d44\u307f\u5408\u308f\u305b<\/h4>\n\n\n\n<p>\u95a2\u6570\u3092\u9069\u5207\u306b\u5206\u5272\u3059\u308b\u969b\u306e\u57fa\u6e96\u3068\u3057\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u306e\u9577\u3055<\/strong>\uff1a\u4e00\u822c\u7684\u306b\u30011\u3064\u306e\u95a2\u6570\u306f\u753b\u9762\u306e\u9ad8\u3055\uff0820\u301c30\u884c\u7a0b\u5ea6\uff09\u306b\u53ce\u307e\u308b\u306e\u304c\u7406\u60f3\u7684\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u62bd\u8c61\u5316\u30ec\u30d9\u30eb<\/strong>\uff1a\u95a2\u6570\u5185\u306e\u3059\u3079\u3066\u306e\u51e6\u7406\u304c\u540c\u3058\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u3067\u3042\u308b\u3079\u304d\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u547d\u540d\u3068\u306e\u4e00\u81f4<\/strong>\uff1a\u95a2\u6570\u540d\u304b\u3089\u60f3\u50cf\u3055\u308c\u308b\u51e6\u7406\u3060\u3051\u3092\u884c\u3046\u3079\u304d\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5909\u66f4\u7406\u7531<\/strong>\uff1a\u95a2\u6570\u3092\u5909\u66f4\u3059\u308b\u7406\u7531\u304c1\u3064\u3060\u3051\u3067\u3042\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u9069\u5207\u306b\u5206\u5272\u3055\u308c\u305f\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u30d0\u30b0\u306e\u767a\u898b\u3068\u4fee\u6b63\u3082\u7c21\u5358\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-163\">\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u95a2\u6570\u8a2d\u8a08\u306e\u91cd\u8981\u306a\u5074\u9762\u306e\u4e00\u3064\u304c\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff08\u5165\u529b\u691c\u8a3c\uff09\u3067\u3059\u3002\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u6570\u306e\u5805\u7262\u6027\u3068\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-164\">\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h4>\n\n\n\n<p>\u95a2\u6570\u306f\u3001\u5b9f\u884c\u524d\u306b\u5fc5\u305a\u5165\u529b\u3092\u691c\u8a3c\u3059\u3079\u304d\u3067\u3059\u3002\u300c\u30ac\u30d9\u30fc\u30b8\u30a4\u30f3\u3001\u30ac\u30d9\u30fc\u30b8\u30a2\u30a6\u30c8\u300d\u3068\u3044\u3046\u539f\u5247\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u5fc5\u9808\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function calculateDiscount(float $price, float $discountPercent) {\n    \/\/ \u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n    if ($price &lt;= 0) {\n        throw new InvalidArgumentException(\"\u4fa1\u683c\u306f\u6b63\u306e\u6570\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\");\n    }\n    \n    if ($discountPercent &lt; 0 || $discountPercent &gt; 100) {\n        throw new InvalidArgumentException(\"\u5272\u5f15\u7387\u306f0%\u304b\u3089100%\u306e\u9593\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\");\n    }\n    \n    \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u5f8c\u306e\u51e6\u7406\n    $discountAmount = $price * ($discountPercent \/ 100);\n    return $price - $discountAmount;\n}\n\ntry {\n    $finalPrice = calculateDiscount(1000, 20);  \/\/ \u6b63\u5e38: 800\u304c\u8fd4\u3055\u308c\u308b\n    $errorPrice = calculateDiscount(-500, 20);  \/\/ \u4f8b\u5916\u304c\u767a\u751f\n} catch (InvalidArgumentException $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage();  \/\/ \u30a8\u30e9\u30fc: \u4fa1\u683c\u306f\u6b63\u306e\u6570\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-165\">\u4f8b\u5916\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u51e6\u7406<\/h4>\n\n\n\n<p>PHP\u3067\u306f\u3001\u4f8b\u5916\uff08Exception\uff09\u3092\u4f7f\u7528\u3057\u3066\u30a8\u30e9\u30fc\u3092\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4f8b\u5916\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u3068\u305d\u306e\u51e6\u7406\u306e\u5206\u96e2<\/strong>\uff1a\u901a\u5e38\u306e\u30b3\u30fc\u30c9\u30d5\u30ed\u30fc\u304b\u3089\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u5206\u96e2\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9<\/strong>\uff1a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u6b63\u78ba\u306a\u5834\u6240\u3068\u547c\u3073\u51fa\u3057\u968e\u5c64\u3092\u8ffd\u8de1\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u578b\u306b\u3088\u308b\u30a8\u30e9\u30fc\u5206\u985e<\/strong>\uff1a\u7570\u306a\u308b\u7a2e\u985e\u306e\u30a8\u30e9\u30fc\u3092\u7570\u306a\u308b\u4f8b\u5916\u30af\u30e9\u30b9\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u3001\u8907\u6570\u306e\u4f8b\u5916\u30bf\u30a4\u30d7\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class FileNotFoundException extends Exception {}\nclass FileReadException extends Exception {}\n\nfunction readConfigFile($filename) {\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u5b58\u5728\u78ba\u8a8d\n    if (!file_exists($filename)) {\n        throw new FileNotFoundException(\"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb '$filename' \u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\");\n    }\n    \n    \/\/ \u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\n    $content = file_get_contents($filename);\n    if ($content === false) {\n        throw new FileReadException(\"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb '$filename' \u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n    }\n    \n    \/\/ JSON\u30c7\u30b3\u30fc\u30c9\n    $config = json_decode($content, true);\n    if (json_last_error() !== JSON_ERROR_NONE) {\n        throw new InvalidArgumentException(\"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306eJSON\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u304c\u7121\u52b9\u3067\u3059: \" . json_last_error_msg());\n    }\n    \n    return $config;\n}\n\ntry {\n    $config = readConfigFile('config.json');\n    \/\/ \u8a2d\u5b9a\u3092\u4f7f\u7528\u3057\u305f\u51e6\u7406\n} catch (FileNotFoundException $e) {\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    echo \"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\\n\";\n    $config = getDefaultConfig();\n} catch (FileReadException $e) {\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306e\u51e6\u7406\n    echo \"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\u7ba1\u7406\u8005\u306b\u9023\u7d61\u3057\u3066\u304f\u3060\u3055\u3044\u3002\\n\";\n    logError($e-&gt;getMessage());\n    exit(1);\n} catch (InvalidArgumentException $e) {\n    \/\/ JSON\u30c7\u30b3\u30fc\u30c9\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306e\u51e6\u7406\n    echo \"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u304c\u7121\u52b9\u3067\u3059\u3002\u4fee\u6b63\u3057\u3066\u304f\u3060\u3055\u3044\u3002\\n\";\n    logError($e-&gt;getMessage());\n    exit(1);\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-166\">\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/h4>\n\n\n\n<p>\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f\u3001\u4e88\u671f\u3057\u306a\u3044\u5165\u529b\u3084\u30a8\u30e9\u30fc\u306b\u5bfe\u3057\u3066\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30c6\u30af\u30cb\u30c3\u30af\u304c\u542b\u307e\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u30c1\u30a7\u30c3\u30af\u3068\u578b\u5f37\u5236<\/strong>\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u3092\u691c\u8a3c\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5f37\u5236\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u4f7f\u7528<\/strong>\uff1a\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u63d0\u4f9b\u3055\u308c\u306a\u3044\u5834\u5408\u306e\u305f\u3081\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3<\/strong>\uff1a\u30a8\u30e9\u30fc\u6761\u4ef6\u3092\u65e9\u671f\u306b\u691c\u51fa\u3057\u3001\u95a2\u6570\u304b\u3089\u65e9\u3081\u306b\u623b\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function getUserSettings($userId, $defaultSettings = []) {\n    \/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3: \u7121\u52b9\u306a\u30e6\u30fc\u30b6\u30fcID\u3092\u30c1\u30a7\u30c3\u30af\n    if (empty($userId)) {\n        return $defaultSettings;\n    }\n    \n    $db = getDatabaseConnection();\n    $settings = $db-&gt;query(\"SELECT settings FROM users WHERE id = ?\", [$userId])-&gt;fetchColumn();\n    \n    \/\/ null\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n    return json_decode($settings, true) ?? $defaultSettings;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$settings = getUserSettings(5, ['theme' =&gt; 'light', 'notifications' =&gt; true]);\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-167\">\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-168\">1. \u53c2\u7167\u6e21\u3057\u306e\u9069\u5207\u306a\u4f7f\u7528<\/h4>\n\n\n\n<p>\u5927\u304d\u306a\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u5834\u5408\u3001\u53c2\u7167\u6e21\u3057\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u95a2\u6570\u5185\u3067\u5f15\u6570\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u306b\u306e\u307f\u4f7f\u7528\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5024\u6e21\u3057: \u5927\u304d\u306a\u914d\u5217\u304c\u30b3\u30d4\u30fc\u3055\u308c\u308b\nfunction processLargeArray($largeArray) {\n    \/\/ \u51e6\u7406\n    return $modifiedArray;\n}\n\n\/\/ \u53c2\u7167\u6e21\u3057: \u30b3\u30d4\u30fc\u306f\u4f5c\u6210\u3055\u308c\u306a\u3044\nfunction processLargeArrayByReference(&amp;$largeArray) {\n    \/\/ \u76f4\u63a5\u914d\u5217\u3092\u5909\u66f4\n    foreach ($largeArray as &amp;$item) {\n        $item *= 2;\n    }\n    \/\/ \u623b\u308a\u5024\u306f\u4e0d\u8981\uff08\u53c2\u7167\u306b\u3088\u308b\u5909\u66f4\uff09\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$data = range(1, 100000); \/\/ \u5927\u304d\u306a\u914d\u5217\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u304c\u60aa\u3044\u65b9\u6cd5\n$start = memory_get_usage();\n$result1 = processLargeArray($data);\necho \"\u5024\u6e21\u3057\u4f7f\u7528\u30e1\u30e2\u30ea: \" . (memory_get_usage() - $start) . \" bytes\\n\";\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u65b9\u6cd5\n$start = memory_get_usage();\nprocessLargeArrayByReference($data);\necho \"\u53c2\u7167\u6e21\u3057\u4f7f\u7528\u30e1\u30e2\u30ea: \" . (memory_get_usage() - $start) . \" bytes\\n\";\n<\/pre>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u53c2\u7167\u6e21\u3057\u306f\u526f\u4f5c\u7528\u3092\u3082\u305f\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u4f7f\u7528\u3059\u308b\u969b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u7279\u306b\u3001\u95a2\u6570\u304c\u5f15\u6570\u3092\u5909\u66f4\u3057\u306a\u3044\u306e\u3067\u3042\u308c\u3070\u3001\u4ee3\u308f\u308a\u306b\u578b\u5ba3\u8a00\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-169\">2. \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3<\/h4>\n\n\n\n<p>\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u65e9\u671f\u306b\u95a2\u6570\u304b\u3089\u623b\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u51e6\u7406\u3092\u56de\u907f\u3057\u3001\u30b3\u30fc\u30c9\u306e\u52b9\u7387\u3068\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\nfunction processOrder($order) {\n    if ($order-&gt;isValid()) {\n        if ($order-&gt;items &gt; 0) {\n            if ($order-&gt;hasPaymentInfo()) {\n                \/\/ \u6ce8\u6587\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\n                return true;\n            } else {\n                return false; \/\/ \u652f\u6255\u3044\u60c5\u5831\u304c\u306a\u3044\n            }\n        } else {\n            return false; \/\/ \u6ce8\u6587\u30a2\u30a4\u30c6\u30e0\u304c\u306a\u3044\n        }\n    } else {\n        return false; \/\/ \u6ce8\u6587\u304c\u7121\u52b9\n    }\n}\n\n\/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\nfunction processOrderImproved($order) {\n    \/\/ \u7121\u52b9\u306a\u6761\u4ef6\u3092\u5148\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    if (!$order-&gt;isValid()) {\n        return false; \/\/ \u6ce8\u6587\u304c\u7121\u52b9\n    }\n    \n    if ($order-&gt;items &lt;= 0) {\n        return false; \/\/ \u6ce8\u6587\u30a2\u30a4\u30c6\u30e0\u304c\u306a\u3044\n    }\n    \n    if (!$order-&gt;hasPaymentInfo()) {\n        return false; \/\/ \u652f\u6255\u3044\u60c5\u5831\u304c\u306a\u3044\n    }\n    \n    \/\/ \u3059\u3079\u3066\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u305f\u5834\u5408\u306e\u307f\u3001\u30e1\u30a4\u30f3\u30ed\u30b8\u30c3\u30af\u304c\u5b9f\u884c\u3055\u308c\u308b\n    \/\/ \u6ce8\u6587\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\n    return true;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-170\">\u95a2\u6570\u8a2d\u8a08\u306e\u539f\u5247: \u5358\u4e00\u8cac\u4efb\u306e\u6cd5\u5247<\/h3>\n\n\n\n<p>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\uff08Single Responsibility Principle\u3001\u4ee5\u4e0bSRP\uff09\u306f\u3001SOLID\u539f\u5247\u306e\u4e00\u3064\u3067\u3001\u300c\u30af\u30e9\u30b9\u3084\u95a2\u6570\u306f1\u3064\u306e\u3053\u3068\u3060\u3051\u3092\u884c\u3044\u3001\u305d\u306e\u3053\u3068\u306b\u5bfe\u3057\u3066\u5b8c\u5168\u306b\u8cac\u4efb\u3092\u6301\u3064\u3079\u304d\u3067\u3042\u308b\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002\u3053\u306e\u539f\u5247\u306f\u95a2\u6570\u8a2d\u8a08\u306b\u304a\u3044\u3066\u7279\u306b\u91cd\u8981\u3067\u3042\u308a\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u57fa\u672c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-171\">\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u304c\u91cd\u8981\u306a\u7406\u7531<\/h4>\n\n\n\n<p>SRP\u306b\u5f93\u3063\u3066\u95a2\u6570\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u591a\u304f\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u95a2\u6570\u306e\u76ee\u7684\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u304c\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u306e\u5bb9\u6613\u3055<\/strong>\uff1a\u5358\u4e00\u306e\u8cac\u4efb\u3092\u6301\u3064\u95a2\u6570\u306f\u3001\u5358\u4f53\u30c6\u30b9\u30c8\u304c\u66f8\u304d\u3084\u3059\u304f\u3001\u30c6\u30b9\u30c8\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u3082\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u95a2\u6570\u306b\u5909\u66f4\u304c\u5fc5\u8981\u306a\u7406\u7531\u304c1\u3064\u3060\u3051\u306b\u306a\u308b\u305f\u3081\u3001\u4e88\u671f\u3057\u306a\u3044\u526f\u4f5c\u7528\u306e\u30ea\u30b9\u30af\u304c\u6e1b\u5c11\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u5c0f\u3055\u304f\u7126\u70b9\u3092\u7d5e\u3063\u305f\u95a2\u6570\u306f\u3001\u4ed6\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u518d\u5229\u7528\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u306e\u7c21\u6613\u3055<\/strong>\uff1a\u554f\u984c\u306e\u539f\u56e0\u3092\u7279\u5b9a\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-172\">\u300c\u4e00\u3064\u306e\u3053\u3068\u300d\u3068\u306f\u4f55\u304b\uff1f<\/h4>\n\n\n\n<p>\u95a2\u6570\u304c\u300c\u4e00\u3064\u306e\u3053\u3068\u300d\u3092\u884c\u3046\u3068\u306f\u3069\u3046\u3044\u3046\u610f\u5473\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u308c\u306f\u3001\u95a2\u6570\u304c\u5358\u4e00\u306e\u8ad6\u7406\u7684\u306a\u64cd\u4f5c\u3092\u5b9f\u884c\u3057\u3001\u305d\u306e\u64cd\u4f5c\u304c\u4e00\u9023\u306e\u95a2\u9023\u3057\u305f\u30b9\u30c6\u30c3\u30d7\u304b\u3089\u6210\u308a\u7acb\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u95a2\u6570\u540d\u306f\u901a\u5e38\u3001\u3053\u306e\u5358\u4e00\u306e\u64cd\u4f5c\u3092\u9069\u5207\u306b\u53cd\u6620\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u8cea\u554f\u304c\u3001\u95a2\u6570\u304c\u5358\u4e00\u8cac\u4efb\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u3092\u5224\u65ad\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306e\u76ee\u7684\u3092\u4e00\u6587\u3067\u8aac\u660e\u3067\u304d\u308b\u304b\uff1f<\/li>\n\n\n\n<li>\u305d\u306e\u8aac\u660e\u306b\u300c\u301c\u3068\u301c\u3068\u301c\u300d\u306e\u3088\u3046\u306b\u300c\u3068\u300d\u304c\u983b\u51fa\u3057\u306a\u3044\u304b\uff1f<\/li>\n\n\n\n<li>\u95a2\u6570\u306e\u4e00\u90e8\u3060\u3051\u3092\u5909\u66f4\u3059\u308b\u7406\u7531\u3092\u8003\u3048\u3089\u308c\u308b\u304b\uff1f<\/li>\n\n\n\n<li>\u95a2\u6570\u5185\u306e\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u3092\u5225\u306e\u95a2\u6570\u3068\u3057\u3066\u62bd\u51fa\u3067\u304d\u308b\u304b\uff1f<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-173\">\u60aa\u3044\u4f8b\u3068\u826f\u3044\u4f8b\u306e\u6bd4\u8f03<\/h4>\n\n\n\n<p>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u9055\u53cd\u3057\u3066\u3044\u308b\u95a2\u6570\u306e\u4f8b\u3092\u898b\u3066\u307f\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u8907\u6570\u306e\u8cac\u4efb\u3092\u6301\u3064\u95a2\u6570\nfunction handleUser($userId, $action, $userData = null) {\n    $db = new PDO('mysql:host=localhost;dbname=myapp', 'username', 'password');\n    \n    if ($action === 'get') {\n        \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306e\u53d6\u5f97\n        $stmt = $db-&gt;prepare(\"SELECT * FROM users WHERE id = ?\");\n        $stmt-&gt;execute([$userId]);\n        return $stmt-&gt;fetch(PDO::FETCH_ASSOC);\n    } elseif ($action === 'create' &amp;&amp; $userData) {\n        \/\/ \u65b0\u898f\u30e6\u30fc\u30b6\u30fc\u306e\u4f5c\u6210\n        $stmt = $db-&gt;prepare(\"INSERT INTO users (name, email, created_at) VALUES (?, ?, NOW())\");\n        $stmt-&gt;execute([$userData['name'], $userData['email']]);\n        return $db-&gt;lastInsertId();\n    } elseif ($action === 'update' &amp;&amp; $userData) {\n        \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306e\u66f4\u65b0\n        $stmt = $db-&gt;prepare(\"UPDATE users SET name = ?, email = ? WHERE id = ?\");\n        $stmt-&gt;execute([$userData['name'], $userData['email'], $userId]);\n        return $stmt-&gt;rowCount() &gt; 0;\n    } elseif ($action === 'delete') {\n        \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u524a\u9664\n        $stmt = $db-&gt;prepare(\"DELETE FROM users WHERE id = ?\");\n        $stmt-&gt;execute([$userId]);\n        return $stmt-&gt;rowCount() &gt; 0;\n    }\n    \n    return false;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$user = handleUser(123, 'get');\n$newUserId = handleUser(null, 'create', ['name' =&gt; '\u5c71\u7530\u592a\u90ce', 'email' =&gt; 'yamada@example.com']);\n$updated = handleUser(123, 'update', ['name' =&gt; '\u5c71\u7530\u6b21\u90ce', 'email' =&gt; 'jiro@example.com']);\n$deleted = handleUser(123, 'delete');\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u306b\u306f\u5c11\u306a\u304f\u3068\u30824\u3064\u306e\u7570\u306a\u308b\u8cac\u4efb\u304c\u3042\u308a\u307e\u3059\uff1a\u30e6\u30fc\u30b6\u30fc\u306e\u53d6\u5f97\u3001\u4f5c\u6210\u3001\u66f4\u65b0\u3001\u524a\u9664\u3067\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u7ba1\u7406\u3082\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092SRP\u306b\u5f93\u3063\u3066\u5206\u5272\u3057\u3066\u307f\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=\"\">\/\/ \u826f\u3044\u4f8b\uff1a\u5358\u4e00\u8cac\u4efb\u3092\u6301\u3064\u95a2\u6570\u7fa4\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u7ba1\u7406\u3059\u308b\u95a2\u6570\nfunction getDatabaseConnection() {\n    static $db = null;\n    if ($db === null) {\n        $db = new PDO('mysql:host=localhost;dbname=myapp', 'username', 'password');\n        $db-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n    }\n    return $db;\n}\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u95a2\u6570\nfunction getUser($userId) {\n    $db = getDatabaseConnection();\n    $stmt = $db-&gt;prepare(\"SELECT * FROM users WHERE id = ?\");\n    $stmt-&gt;execute([$userId]);\n    return $stmt-&gt;fetch(PDO::FETCH_ASSOC);\n}\n\n\/\/ \u65b0\u898f\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3059\u308b\u95a2\u6570\nfunction createUser($userData) {\n    $db = getDatabaseConnection();\n    $stmt = $db-&gt;prepare(\"INSERT INTO users (name, email, created_at) VALUES (?, ?, NOW())\");\n    $stmt-&gt;execute([$userData['name'], $userData['email']]);\n    return $db-&gt;lastInsertId();\n}\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u66f4\u65b0\u3059\u308b\u95a2\u6570\nfunction updateUser($userId, $userData) {\n    $db = getDatabaseConnection();\n    $stmt = $db-&gt;prepare(\"UPDATE users SET name = ?, email = ? WHERE id = ?\");\n    $stmt-&gt;execute([$userData['name'], $userData['email'], $userId]);\n    return $stmt-&gt;rowCount() &gt; 0;\n}\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u524a\u9664\u3059\u308b\u95a2\u6570\nfunction deleteUser($userId) {\n    $db = getDatabaseConnection();\n    $stmt = $db-&gt;prepare(\"DELETE FROM users WHERE id = ?\");\n    $stmt-&gt;execute([$userId]);\n    return $stmt-&gt;rowCount() &gt; 0;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$user = getUser(123);\n$newUserId = createUser(['name' =&gt; '\u5c71\u7530\u592a\u90ce', 'email' =&gt; 'yamada@example.com']);\n$updated = updateUser(123, ['name' =&gt; '\u5c71\u7530\u6b21\u90ce', 'email' =&gt; 'jiro@example.com']);\n$deleted = deleteUser(123);\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6539\u5584\u7248\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u95a2\u6570\u304c\u4e00\u3064\u306e\u8cac\u4efb\u3060\u3051\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a2d\u8a08\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u540d\u304c\u76ee\u7684\u3092\u660e\u78ba\u306b\u793a\u3059<\/strong>\uff1a\u4f55\u3092\u3059\u308b\u304b\u304c\u95a2\u6570\u540d\u304b\u3089\u660e\u3089\u304b\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613<\/strong>\uff1a\u5404\u6a5f\u80fd\u3092\u500b\u5225\u306b\u30c6\u30b9\u30c8\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a<\/strong>\uff1a\u7279\u5b9a\u306e\u64cd\u4f5c\u3060\u3051\u3092\u5225\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u7406\u89e3\u304c\u5bb9\u6613<\/strong>\uff1a\u5404\u95a2\u6570\u304c\u77ed\u304f\u3001\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5909\u66f4\u306e\u5f71\u97ff\u7bc4\u56f2\u304c\u9650\u5b9a\u7684<\/strong>\uff1a\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u524a\u9664\u306e\u30ed\u30b8\u30c3\u30af\u3060\u3051\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u3001<code>deleteUser()<\/code>\u95a2\u6570\u3060\u3051\u3092\u4fee\u6b63\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-174\">\u95a2\u6570\u306e\u9069\u5207\u306a\u5206\u5272\u65b9\u6cd5<\/h4>\n\n\n\n<p>\u95a2\u6570\u3092\u9069\u5207\u306b\u5206\u5272\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u3092\u63c3\u3048\u308b<\/strong>\uff1a\u95a2\u6570\u5185\u306e\u51e6\u7406\u306f\u540c\u3058\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u3067\u3042\u308b\u3079\u304d\u3067\u3059\u3002\u7570\u306a\u308b\u30ec\u30d9\u30eb\u306e\u51e6\u7406\u304c\u6df7\u5728\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u3089\u3092\u5225\u3005\u306e\u95a2\u6570\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u304c\u6df7\u5728\nfunction registerUser($data) {\n    \/\/ \u9ad8\u30ec\u30d9\u30eb\u306e\u51e6\u7406\n    $validatedData = validateUserData($data);\n    \n    \/\/ \u4f4e\u30ec\u30d9\u30eb\u306e\u51e6\u7406\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u8a73\u7d30\uff09\n    $db = new PDO('mysql:host=localhost;dbname=myapp', 'user', 'pass');\n    $stmt = $db-&gt;prepare(\"INSERT INTO users (name, email) VALUES (?, ?)\");\n    $stmt-&gt;execute([$validatedData['name'], $validatedData['email']]);\n    $userId = $db-&gt;lastInsertId();\n    \n    \/\/ \u9ad8\u30ec\u30d9\u30eb\u306e\u51e6\u7406\n    sendWelcomeEmail($validatedData['email']);\n    \n    return $userId;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-175\">\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u5805\u7262\u306aPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u52b9\u679c\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u9069\u5207\u306b\u5b9f\u88c5\u3055\u308c\u305f\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u4e88\u671f\u3057\u306a\u3044\u72b6\u6cc1\u306b\u5bfe\u51e6\u3059\u308b\u80fd\u529b\u3092\u9ad8\u3081\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u3001\u3088\u308a\u826f\u3044\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u95a2\u6570\u306b\u304a\u3051\u308b\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-176\">\u95a2\u6570\u5185\u3067\u306e\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u6027<\/h4>\n\n\n\n<p>\u95a2\u6570\u306f\u3001\u5b9f\u884c\u3055\u308c\u308b\u524d\u306b\u5165\u529b\u3092\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff08\u691c\u8a3c\uff09\u3059\u3079\u304d\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e0d\u6b63\u306a\u5165\u529b\u306b\u3088\u308b\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u554f\u984c\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u539f\u5247:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u65e9\u671f\u691c\u8a3c<\/strong>: \u95a2\u6570\u306e\u5192\u982d\u3067\u5165\u529b\u3092\u691c\u8a3c\u3057\u3001\u7121\u52b9\u306a\u5165\u529b\u306b\u306f\u65e9\u671f\u306b\u30a8\u30e9\u30fc\u3092\u8fd4\u3059<\/li>\n\n\n\n<li><strong>\u660e\u78ba\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/strong>: \u30e6\u30fc\u30b6\u30fc\u304c\u554f\u984c\u3092\u7406\u89e3\u3057\u3066\u4fee\u6b63\u3067\u304d\u308b\u3088\u3046\u3001\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n\n\n\n<li><strong>\u578b\u3068\u7bc4\u56f2\u306e\u691c\u8a3c<\/strong>: \u5165\u529b\u5024\u306e\u578b\u3001\u7bc4\u56f2\u3001\u5f62\u5f0f\u306a\u3069\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n\n\n\n<li><strong>\u300c\u4fe1\u983c\u3057\u306a\u3044\u300d\u59ff\u52e2<\/strong>: \u3059\u3079\u3066\u306e\u5916\u90e8\u5165\u529b\uff08\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3001API\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306a\u3069\uff09\u3092\u6f5c\u5728\u7684\u306b\u5371\u967a\u3068\u307f\u306a\u3059<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-177\">\u57fa\u672c\u7684\u306a\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b<\/h4>\n\n\n\n<p>\u307e\u305a\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b\u3092\u898b\u3066\u307f\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=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\u306b\u57fa\u3065\u3044\u3066\u5272\u5f15\u7387\u3092\u8a08\u7b97\u3059\u308b\n *\n * @param int $age \u30e6\u30fc\u30b6\u30fc\u306e\u5e74\u9f62\uff080\u4ee5\u4e0a\u306e\u6574\u6570\uff09\n * @return float \u5272\u5f15\u7387\uff080.0\u301c0.5\u306e\u7bc4\u56f2\uff09\n * @throws InvalidArgumentException \u7121\u52b9\u306a\u5165\u529b\u306e\u5834\u5408\n *\/\nfunction calculateAgeDiscount($age) {\n    \/\/ \u578b\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n    if (!is_int($age) &amp;&amp; !ctype_digit($age)) {\n        throw new InvalidArgumentException('\u5e74\u9f62\u306f\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n    }\n    \n    \/\/ \u6574\u6570\u306b\u5909\u63db\uff08\u6587\u5b57\u5217\u306e\u6570\u5b57\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\uff09\n    $age = (int)$age;\n    \n    \/\/ \u7bc4\u56f2\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n    if ($age &lt; 0) {\n        throw new InvalidArgumentException('\u5e74\u9f62\u306f0\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n    }\n    \n    \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\n    if ($age &lt; 12) {\n        return 0.5; \/\/ \u5b50\u4f9b: 50%\u5272\u5f15\n    } elseif ($age &gt;= 65) {\n        return 0.3; \/\/ \u30b7\u30cb\u30a2: 30%\u5272\u5f15\n    } elseif ($age &gt;= 18 &amp;&amp; $age &lt; 25) {\n        return 0.2; \/\/ \u82e5\u8005: 20%\u5272\u5f15\n    } else {\n        return 0.0; \/\/ \u901a\u5e38\u4fa1\u683c\uff08\u5272\u5f15\u306a\u3057\uff09\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ntry {\n    echo \"\u5b50\u4f9b\u306e\u5272\u5f15\u7387: \" . calculateAgeDiscount(10) . \"\\n\"; \/\/ 0.5\n    echo \"\u5927\u4eba\u306e\u5272\u5f15\u7387: \" . calculateAgeDiscount(35) . \"\\n\"; \/\/ 0.0\n    echo \"\u30b7\u30cb\u30a2\u306e\u5272\u5f15\u7387: \" . calculateAgeDiscount(70) . \"\\n\"; \/\/ 0.3\n    \n    \/\/ \u7121\u52b9\u306a\u5165\u529b\n    echo calculateAgeDiscount(\"abc\"); \/\/ \u4f8b\u5916\u304c\u767a\u751f\n} catch (InvalidArgumentException $e) {\n    echo \"\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage() . \"\\n\"; \/\/ \u30a8\u30e9\u30fc: \u5e74\u9f62\u306f\u6574\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u3067\u306f\u3001\u5165\u529b\u5024\u306e\u578b\u3068\u7bc4\u56f2\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304b\u3089\u51e6\u7406\u3092\u9032\u3081\u3066\u3044\u307e\u3059\u3002\u7121\u52b9\u306a\u5165\u529b\u304c\u691c\u51fa\u3055\u308c\u305f\u5834\u5408\u3001\u5177\u4f53\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u5171\u306b\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-178\">PHP\u7d44\u307f\u8fbc\u307f\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u95a2\u6570\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>PHP\u306b\u306f\u3001\u5165\u529b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306b\u5f79\u7acb\u3064\u591a\u304f\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\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=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u767b\u9332\u30c7\u30fc\u30bf\u3092\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3059\u308b\n *\n * @param array $userData \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\n * @return array \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u914d\u5217\n *\/\nfunction validateUserData($userData) {\n    $errors = [];\n    \n    \/\/ \u540d\u524d\u306e\u691c\u8a3c\n    if (empty($userData['name'])) {\n        $errors['name'] = '\u540d\u524d\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (strlen($userData['name']) &lt; 2) {\n        $errors['name'] = '\u540d\u524d\u306f2\u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    } elseif (strlen($userData['name']) &gt; 50) {\n        $errors['name'] = '\u540d\u524d\u306f50\u6587\u5b57\u4ee5\u4e0b\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    }\n    \n    \/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u691c\u8a3c\n    if (empty($userData['email'])) {\n        $errors['email'] = '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (!filter_var($userData['email'], FILTER_VALIDATE_EMAIL)) {\n        $errors['email'] = '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n    }\n    \n    \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\n    if (empty($userData['password'])) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (strlen($userData['password']) &lt; 8) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f8\u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    } elseif (!preg_match('\/[A-Z]\/', $userData['password']) ||\n              !preg_match('\/[a-z]\/', $userData['password']) ||\n              !preg_match('\/[0-9]\/', $userData['password'])) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u5927\u6587\u5b57\u3001\u5c0f\u6587\u5b57\u3001\u6570\u5b57\u3092\u305d\u308c\u305e\u308c\u542b\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    }\n    \n    \/\/ \u5e74\u9f62\u306e\u691c\u8a3c\n    if (isset($userData['age'])) {\n        if (!is_numeric($userData['age'])) {\n            $errors['age'] = '\u5e74\u9f62\u306f\u6570\u5024\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n        } elseif ($userData['age'] &lt; 18 || $userData['age'] &gt; 120) {\n            $errors['age'] = '\u5e74\u9f62\u306f18\u301c120\u306e\u7bc4\u56f2\u5185\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n        }\n    }\n    \n    return $errors;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-179\">\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u306f\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u9ad8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u304a\u3044\u3066\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u91cd\u8981\u306a\u5074\u9762\u3067\u3059\u3002\u52b9\u7387\u7684\u306a\u95a2\u6570\u306f\u3001\u5fdc\u7b54\u6642\u9593\u306e\u77ed\u7e2e\u3001\u30b5\u30fc\u30d0\u30fc\u30ea\u30bd\u30fc\u30b9\u306e\u7bc0\u7d04\u3001\u305d\u3057\u3066\u3088\u308a\u826f\u3044\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u95a2\u6570\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-180\">\u4e0d\u8981\u306a\u51e6\u7406\u306e\u524a\u6e1b<\/h4>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u4e0d\u8981\u306a\u51e6\u7406\u3092\u7279\u5b9a\u3057\u524a\u6e1b\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-181\">1. \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3<\/h5>\n\n\n\n<p>\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u65e9\u671f\u306b\u95a2\u6570\u304b\u3089\u623b\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u51e6\u7406\u3092\u56de\u907f\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=\"\">\/\/ \u6700\u9069\u5316\u524d: \u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\nfunction processUserData($userData) {\n    if (isset($userData['name'])) {\n        if ($userData['status'] === 'active') {\n            if ($userData['age'] &gt;= 18) {\n                \/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n                return [\n                    'success' =&gt; true,\n                    'message' =&gt; '\u30c7\u30fc\u30bf\u51e6\u7406\u5b8c\u4e86'\n                ];\n            } else {\n                return [\n                    'success' =&gt; false,\n                    'message' =&gt; '18\u6b73\u672a\u6e80\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u51e6\u7406\u3067\u304d\u307e\u305b\u3093'\n                ];\n            }\n        } else {\n            return [\n                'success' =&gt; false,\n                'message' =&gt; '\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u306f\u51e6\u7406\u3067\u304d\u307e\u305b\u3093'\n            ];\n        }\n    } else {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u540d\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093'\n        ];\n    }\n}\n\n\/\/ \u6700\u9069\u5316\u5f8c: \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\nfunction processUserDataOptimized($userData) {\n    \/\/ \u7121\u52b9\u306a\u6761\u4ef6\u3092\u5148\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    if (!isset($userData['name'])) {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u540d\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093'\n        ];\n    }\n    \n    if ($userData['status'] !== 'active') {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u306f\u51e6\u7406\u3067\u304d\u307e\u305b\u3093'\n        ];\n    }\n    \n    if ($userData['age'] &lt; 18) {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '18\u6b73\u672a\u6e80\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u51e6\u7406\u3067\u304d\u307e\u305b\u3093'\n        ];\n    }\n    \n    \/\/ \u3059\u3079\u3066\u306e\u6761\u4ef6\u3092\u30d1\u30b9\u3057\u305f\u5834\u5408\u306b\u306e\u307f\u3001\u30e1\u30a4\u30f3\u306e\u51e6\u7406\u3092\u5b9f\u884c\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n    return [\n        'success' =&gt; true,\n        'message' =&gt; '\u30c7\u30fc\u30bf\u51e6\u7406\u5b8c\u4e86'\n    ];\n}\n<\/pre>\n\n\n\n<p>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u6761\u4ef6\u304c\u6e80\u305f\u3055\u308c\u306a\u3044\u5834\u5408\u306b\u4e0d\u8981\u306a\u51e6\u7406\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"i-182\">2. \u30eb\u30fc\u30d7\u5185\u3067\u306e\u5197\u9577\u306a\u51e6\u7406\u306e\u56de\u907f<\/h5>\n\n\n\n<p>\u30eb\u30fc\u30d7\u5185\u3067\u4e0d\u5909\u306e\u8a08\u7b97\u3084\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u7e70\u308a\u8fd4\u3059\u3053\u3068\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6700\u9069\u5316\u524d: \u30eb\u30fc\u30d7\u5185\u306e\u5197\u9577\u306a\u51e6\u7406\nfunction calculateTotalPrice($items) {\n    $total = 0;\n    for ($i = 0; $i &lt; count($items); $i++) { \/\/ count()\u304c\u6bce\u56de\u547c\u3070\u308c\u308b\n        $price = $items[$i]['price'];\n        $quantity = $items[$i]['quantity'];\n        \n        \/\/ \u5272\u5f15\u7387\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c1\u30a7\u30c3\u30af\u3001\u306a\u3051\u308c\u3070\u53d6\u5f97\u3057\u3066\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\n        $itemId = $items[$i]['id'];\n        if (!isset($discountCache[$itemId])) {\n            $discountCache[$itemId] = getItemDiscount($itemId);\n        }\n        $discount = $discountCache[$itemId];\n        \n        $total += $price * $quantity * (1 - $discount \/ 100);\n    }\n    return $total;\n}\n        $discount = getItemDiscount($items[$i]['id']); \/\/ \u540c\u3058ID\u306b\u5bfe\u3057\u3066\u8907\u6570\u56de\u547c\u3070\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\n        $total += $price * $quantity * (1 - $discount \/ 100);\n    }\n    return $total;\n}\n\n\/\/ \u6700\u9069\u5316\u5f8c: \u30eb\u30fc\u30d7\u5916\u3067\u8a08\u7b97\u3057\u3001\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\nfunction calculateTotalPriceOptimized($items) {\n    $total = 0;\n    $count = count($items); \/\/ \u30eb\u30fc\u30d7\u5916\u3067\u4e00\u5ea6\u3060\u3051\u8a08\u7b97\n    $discountCache = []; \/\/ \u5272\u5f15\u7387\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u305f\u3081\u306e\u914d\u5217\n    \n    for ($i = 0; $i &lt; $count; $i++) {\n        $price = $items[$i]['price'];\n        $quantity = $items[$i]['quantity'];\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-183\">\u5b9f\u8df5\u7684\u306aPHP\u95a2\u6570\u306e\u4f7f\u7528\u4f8b<\/h2>\n\n\n\n<p>\u3053\u3053\u307e\u3067PHP\u95a2\u6570\u306e\u57fa\u672c\u304b\u3089\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3001\u8a2d\u8a08\u539f\u5247\u3001\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u95a2\u6570\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4f8b\u306f\u3001\u65e5\u5e38\u7684\u306aWeb\u958b\u767a\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-184\">\u30c7\u30fc\u30bf\u51e6\u7406\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u51e6\u7406\u306f\u3001\u307b\u3068\u3093\u3069\u306ePHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u6838\u3068\u306a\u308b\u6a5f\u80fd\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u4e00\u822c\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u30bf\u30b9\u30af\u306e\u305f\u3081\u306e\u95a2\u6570\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-185\">\u914d\u5217\u64cd\u4f5c\u306e\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u3092\u7c21\u7d20\u5316\u3059\u308b\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u308b\u512a\u308c\u305f\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u6307\u5b9a\u3055\u308c\u305f\u30ad\u30fc\u306e\u5024\u3092\u62bd\u51fa\u3059\u308b\n *\n * @param array $array \u51e6\u7406\u3059\u308b\u914d\u5217\n * @param string $key \u62bd\u51fa\u3059\u308b\u30ad\u30fc\n * @return array \u62bd\u51fa\u3055\u308c\u305f\u5024\u306e\u914d\u5217\n *\/\nfunction pluck(array $array, string $key): array {\n    return array_map(function($item) use ($key) {\n        return is_array($item) &amp;&amp; isset($item[$key]) ? $item[$key] : null;\n    }, $array);\n}\n\n\/**\n * \u591a\u6b21\u5143\u914d\u5217\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\n *\n * @param array $array \u51e6\u7406\u3059\u308b\u914d\u5217\n * @param string $key \u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\u30ad\u30fc\n * @return array \u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction groupBy(array $array, string $key): array {\n    $result = [];\n    \n    foreach ($array as $item) {\n        if (!is_array($item) || !isset($item[$key])) {\n            continue;\n        }\n        \n        $groupKey = $item[$key];\n        \n        if (!isset($result[$groupKey])) {\n            $result[$groupKey] = [];\n        }\n        \n        $result[$groupKey][] = $item;\n    }\n    \n    return $result;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-186\">\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306e\u305f\u3081\u306e\u95a2\u6570\u4f8b<\/h3>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306f\u3001PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e00\u822c\u7684\u306a\u30bf\u30b9\u30af\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d\u3068\u51e6\u7406\u3092\u7c21\u7d20\u5316\u3059\u308b\u95a2\u6570\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-187\">\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u66f8\u304d\u306e\u30e9\u30c3\u30d1\u30fc\u95a2\u6570<\/h4>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3092\u5b89\u5168\u304b\u3064\u52b9\u7387\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u30e9\u30c3\u30d1\u30fc\u95a2\u6570\u306f\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u7c21\u7565\u5316\u3057\u3001\u4e00\u8cab\u3057\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30d5\u30a1\u30a4\u30eb\u3092\u5b89\u5168\u306b\u8aad\u307f\u8fbc\u3080\n * \n * @param string $filepath \u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param bool $asArray \u914d\u5217\u3068\u3057\u3066\u8fd4\u3059\u304b\u3069\u3046\u304b\n * @return string|array|null \u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u307e\u305f\u306f\u5931\u6557\u6642\u306bnull\n *\/\nfunction safeReadFile(string $filepath, bool $asArray = false) {\n    if (!file_exists($filepath)) {\n        error_log(\"\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: $filepath\");\n        return null;\n    }\n    \n    try {\n        $content = $asArray ? file($filepath, FILE_IGNORE_NEW_LINES) : file_get_contents($filepath);\n        return $content;\n    } catch (Exception $e) {\n        error_log(\"\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return null;\n    }\n}\n\n\/**\n * \u30d5\u30a1\u30a4\u30eb\u306b\u5b89\u5168\u306b\u66f8\u304d\u8fbc\u3080\n * \n * @param string $filepath \u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param string $content \u66f8\u304d\u8fbc\u3080\u5185\u5bb9\n * @param int $flags \u30d5\u30a1\u30a4\u30eb\u66f8\u304d\u8fbc\u307f\u30d5\u30e9\u30b0\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction safeWriteFile(string $filepath, string $content, int $flags = 0): bool {\n    try {\n        \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u4f5c\u6210\n        $dir = dirname($filepath);\n        if (!file_exists($dir)) {\n            if (!mkdir($dir, 0755, true)) {\n                error_log(\"\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f: $dir\");\n                return false;\n            }\n        }\n        \n        $result = file_put_contents($filepath, $content, $flags);\n        if ($result === false) {\n            error_log(\"\u30d5\u30a1\u30a4\u30eb\u66f8\u304d\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f: $filepath\");\n            return false;\n        }\n        \n        return true;\n    } catch (Exception $e) {\n        error_log(\"\u30d5\u30a1\u30a4\u30eb\u66f8\u304d\u8fbc\u307f\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return false;\n    }\n}\n\n\/**\n * \u30d5\u30a1\u30a4\u30eb\u3092\u5b89\u5168\u306b\u524a\u9664\u3059\u308b\n * \n * @param string $filepath \u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction safeDeleteFile(string $filepath): bool {\n    if (!file_exists($filepath)) {\n        return true; \/\/ \u65e2\u306b\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u6210\u529f\u3068\u307f\u306a\u3059\n    }\n    \n    try {\n        if (!unlink($filepath)) {\n            error_log(\"\u30d5\u30a1\u30a4\u30eb\u524a\u9664\u306b\u5931\u6557\u3057\u307e\u3057\u305f: $filepath\");\n            return false;\n        }\n        \n        return true;\n    } catch (Exception $e) {\n        error_log(\"\u30d5\u30a1\u30a4\u30eb\u524a\u9664\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return false;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$configPath = 'config\/app.json';\n$config = safeReadFile($configPath);\n\nif ($config !== null) {\n    $configData = safeJsonDecode($config);\n    \/\/ config\u30c7\u30fc\u30bf\u3092\u51e6\u7406...\n    \n    \/\/ \u8a2d\u5b9a\u3092\u66f4\u65b0\n    $configData['debug'] = false;\n    $configData['version'] = '1.2.0';\n    \n    \/\/ \u66f4\u65b0\u3057\u305f\u8a2d\u5b9a\u3092\u66f8\u304d\u8fbc\u307f\n    $newConfig = safeJsonEncode($configData);\n    if ($newConfig) {\n        safeWriteFile($configPath, $newConfig);\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-188\">CSV\u30c7\u30fc\u30bf\u51e6\u7406\u95a2\u6570<\/h4>\n\n\n\n<p>CSV\u30d5\u30a1\u30a4\u30eb\u306f\u30c7\u30fc\u30bf\u306e\u4ea4\u63db\u3084\u4fdd\u5b58\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u95a2\u6570\u306f\u3001CSV\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\u3068\u66f8\u304d\u8fbc\u307f\u3092\u7c21\u7d20\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * CSV\u30d5\u30a1\u30a4\u30eb\u3092\u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\n * \n * @param string $filepath CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param string $delimiter \u533a\u5207\u308a\u6587\u5b57\n * @param string $enclosure \u56f2\u307f\u6587\u5b57\n * @param string $escape \u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return array|null CSV\u30c7\u30fc\u30bf\u306e\u914d\u5217\u307e\u305f\u306f\u5931\u6557\u6642\u306bnull\n *\/\nfunction importCsv(\n    string $filepath, \n    string $delimiter = ',', \n    string $enclosure = '\"', \n    string $escape = '\\\\', \n    bool $hasHeader = true\n): ?array {\n    if (!file_exists($filepath)) {\n        error_log(\"CSV\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: $filepath\");\n        return null;\n    }\n    \n    try {\n        $handle = fopen($filepath, 'r');\n        if ($handle === false) {\n            error_log(\"CSV\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f: $filepath\");\n            return null;\n        }\n        \n        $rows = [];\n        $header = [];\n        $lineNumber = 0;\n        \n        while (($data = fgetcsv($handle, 0, $delimiter, $enclosure, $escape)) !== false) {\n            $lineNumber++;\n            \n            \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u51e6\u7406\n            if ($lineNumber === 1 &amp;&amp; $hasHeader) {\n                $header = array_map('trim', $data);\n                continue;\n            }\n            \n            \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u8ffd\u52a0\n            if ($hasHeader) {\n                $row = [];\n                foreach ($header as $i =&gt; $columnName) {\n                    $row[$columnName] = $data[$i] ?? null;\n                }\n                $rows[] = $row;\n            } else {\n                $rows[] = $data;\n            }\n        }\n        \n        fclose($handle);\n        return $rows;\n    } catch (Exception $e) {\n        error_log(\"CSV\u30a4\u30f3\u30dd\u30fc\u30c8\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return null;\n    }\n}\n\n\/**\n * \u30c7\u30fc\u30bf\u914d\u5217\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3059\u308b\n * \n * @param array $data \u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3059\u308b\u30c7\u30fc\u30bf\n * @param string $filepath \u51fa\u529bCSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param string $delimiter \u533a\u5207\u308a\u6587\u5b57\n * @param string $enclosure \u56f2\u307f\u6587\u5b57\n * @param string $escape \u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\n * @param bool $includeHeader \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u542b\u3081\u308b\u304b\u3069\u3046\u304b\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction exportCsv(\n    array $data, \n    string $filepath, \n    string $delimiter = ',', \n    string $enclosure = '\"', \n    string $escape = '\\\\', \n    bool $includeHeader = true\n): bool {\n    if (empty($data)) {\n        error_log(\"\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3059\u308b\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\");\n        return false;\n    }\n    \n    try {\n        \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u4f5c\u6210\n        $dir = dirname($filepath);\n        if (!file_exists($dir)) {\n            if (!mkdir($dir, 0755, true)) {\n                error_log(\"\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f: $dir\");\n                return false;\n            }\n        }\n        \n        $handle = fopen($filepath, 'w');\n        if ($handle === false) {\n            error_log(\"CSV\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f: $filepath\");\n            return false;\n        }\n        \n        \/\/ \u30c7\u30fc\u30bf\u304c\u9023\u60f3\u914d\u5217\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\n        $firstRow = reset($data);\n        $isAssoc = is_array($firstRow) &amp;&amp; array_keys($firstRow) !== range(0, count($firstRow) - 1);\n        \n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u66f8\u304d\u8fbc\u307f\n        if ($includeHeader &amp;&amp; $isAssoc) {\n            $header = array_keys($firstRow);\n            fputcsv($handle, $header, $delimiter, $enclosure, $escape);\n        }\n        \n        \/\/ \u30c7\u30fc\u30bf\u884c\u3092\u66f8\u304d\u8fbc\u307f\n        foreach ($data as $row) {\n            if ($isAssoc) {\n                fputcsv($handle, $row, $delimiter, $enclosure, $escape);\n            } else {\n                fputcsv($handle, is_array($row) ? $row : [$row], $delimiter, $enclosure, $escape);\n            }\n        }\n        \n        fclose($handle);\n        return true;\n    } catch (Exception $e) {\n        error_log(\"CSV\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return false;\n    }\n}\n\n\/**\n * CSV\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\uff08\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u7528\uff09\n * \n * @param string $filepath CSV\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\n * @param callable $callback \u5404\u884c\u3092\u51e6\u7406\u3059\u308b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\n * @param string $delimiter \u533a\u5207\u308a\u6587\u5b57\n * @param string $enclosure \u56f2\u307f\u6587\u5b57\n * @param string $escape \u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\n * @param bool $hasHeader \u30d8\u30c3\u30c0\u30fc\u884c\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n * @return int \u51e6\u7406\u3055\u308c\u305f\u884c\u6570\u307e\u305f\u306f\u5931\u6557\u6642\u306b-1\n *\/\nfunction processLargeCsvFile(\n    string $filepath, \n    callable $callback, \n    string $delimiter = ',', \n    string $enclosure = '\"', \n    string $escape = '\\\\', \n    bool $hasHeader = true\n): int {\n    if (!file_exists($filepath)) {\n        error_log(\"CSV\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: $filepath\");\n        return -1;\n    }\n    \n    try {\n        $handle = fopen($filepath, 'r');\n        if ($handle === false) {\n            error_log(\"CSV\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f: $filepath\");\n            return -1;\n        }\n        \n        $header = [];\n        $lineNumber = 0;\n        $processedRows = 0;\n        \n        while (($data = fgetcsv($handle, 0, $delimiter, $enclosure, $escape)) !== false) {\n            $lineNumber++;\n            \n            \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u3092\u51e6\u7406\n            if ($lineNumber === 1 &amp;&amp; $hasHeader) {\n                $header = array_map('trim', $data);\n                continue;\n            }\n            \n            \/\/ \u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u5834\u5408\u306f\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\n            if ($hasHeader) {\n                $row = [];\n                foreach ($header as $i =&gt; $columnName) {\n                    $row[$columnName] = $data[$i] ?? null;\n                }\n            } else {\n                $row = $data;\n            }\n            \n            \/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u884c\u3092\u51e6\u7406\n            $result = $callback($row, $lineNumber);\n            if ($result !== false) {\n                $processedRows++;\n            }\n        }\n        \n        fclose($handle);\n        return $processedRows;\n    } catch (Exception $e) {\n        error_log(\"CSV\u51e6\u7406\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return -1;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$salesData = [\n    ['date' =&gt; '2023-01-15', 'product' =&gt; '\u30ce\u30fc\u30c8PC', 'quantity' =&gt; 3, 'price' =&gt; 120000],\n    ['date' =&gt; '2023-01-16', 'product' =&gt; '\u30de\u30a6\u30b9', 'quantity' =&gt; 10, 'price' =&gt; 5000],\n    ['date' =&gt; '2023-01-17', 'product' =&gt; '\u30ad\u30fc\u30dc\u30fc\u30c9', 'quantity' =&gt; 5, 'price' =&gt; 8000],\n];\n\n\/\/ \u30c7\u30fc\u30bf\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\nexportCsv($salesData, 'exports\/sales.csv');\n\n\/\/ CSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\n$importedData = importCsv('exports\/sales.csv');\n\n\/\/ \u5927\u304d\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\n$totalSales = 0;\nprocessLargeCsvFile('exports\/sales.csv', function($row) use (&amp;$totalSales) {\n    $totalSales += $row['quantity'] * $row['price'];\n    echo \"\u8ca9\u58f2: {$row['date']} - {$row['product']} x {$row['quantity']}\\n\";\n    return true;\n});\n\necho \"\u7dcf\u58f2\u4e0a: \" . number_format($totalSales) . \"\u5186\\n\";\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-189\">\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u3068\u51e6\u7406\u306e\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570<\/h4>\n\n\n\n<p>\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\u3068\u64cd\u4f5c\u306e\u305f\u3081\u306e\u95a2\u6570\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3084\u51e6\u7406\u306e\u969b\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=\"\">\/**\n * \u5b89\u5168\u306a\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\n * \n * @param string $prefix \u30d5\u30a1\u30a4\u30eb\u540d\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\n * @param string $content \u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\n * @param string $dir \u4e00\u6642\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08null\u306e\u5834\u5408\u306f\u30b7\u30b9\u30c6\u30e0\u306etmp\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff09\n * @return string|null \u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u307e\u305f\u306f\u5931\u6557\u6642\u306bnull\n *\/\nfunction createTempFile(string $prefix = 'tmp_', string $content = '', string $dir = null): ?string {\n    try {\n        $dir = $dir ?? sys_get_temp_dir();\n        \n        \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u5b58\u5728\u3057\u3001\u66f8\u304d\u8fbc\u307f\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\n        if (!file_exists($dir) || !is_writable($dir)) {\n            if (!mkdir($dir, 0755, true)) {\n                error_log(\"\u4e00\u6642\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u307e\u305f\u306f\u66f8\u304d\u8fbc\u307f\u3067\u304d\u307e\u305b\u3093: $dir\");\n                return null;\n            }\n        }\n        \n        \/\/ \u30e6\u30cb\u30fc\u30af\u306a\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u751f\u6210\n        $tempFile = tempnam($dir, $prefix);\n        if ($tempFile === false) {\n            error_log(\"\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\");\n            return null;\n        }\n        \n        \/\/ \u5185\u5bb9\u3092\u66f8\u304d\u8fbc\u307f\n        if (!empty($content)) {\n            file_put_contents($tempFile, $content);\n        }\n        \n        return $tempFile;\n    } catch (Exception $e) {\n        error_log(\"\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u4f5c\u6210\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return null;\n    }\n}\n\n\/**\n * \u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u30ea\u30b5\u30a4\u30ba\u3059\u308b\n * \n * @param string $sourcePath \u5143\u753b\u50cf\u306e\u30d1\u30b9\n * @param string $destPath \u4fdd\u5b58\u5148\u306e\u30d1\u30b9\n * @param int $maxWidth \u6700\u5927\u5e45\n * @param int $maxHeight \u6700\u5927\u9ad8\u3055\n * @param int $quality \u753b\u8cea\uff08JPEG\u7528\uff09\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction resizeImage(\n    string $sourcePath, \n    string $destPath, \n    int $maxWidth = 800, \n    int $maxHeight = 600, \n    int $quality = 80\n): bool {\n    if (!file_exists($sourcePath)) {\n        error_log(\"\u5143\u753b\u50cf\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: $sourcePath\");\n        return false;\n    }\n    \n    try {\n        \/\/ \u753b\u50cf\u306e\u7a2e\u985e\u3092\u5224\u5b9a\n        $imageInfo = getimagesize($sourcePath);\n        if ($imageInfo === false) {\n            error_log(\"\u753b\u50cf\u60c5\u5831\u3092\u53d6\u5f97\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f: $sourcePath\");\n            return false;\n        }\n        \n        [$width, $height, $type] = $imageInfo;\n        \n        \/\/ \u5143\u753b\u50cf\u3092\u8aad\u307f\u8fbc\u307f\n        $sourceImage = match($type) {\n            IMAGETYPE_JPEG =&gt; imagecreatefromjpeg($sourcePath),\n            IMAGETYPE_PNG =&gt; imagecreatefrompng($sourcePath),\n            IMAGETYPE_GIF =&gt; imagecreatefromgif($sourcePath),\n            default =&gt; false\n        };\n        \n        if ($sourceImage === false) {\n            error_log(\"\u753b\u50cf\u3092\u8aad\u307f\u8fbc\u3081\u307e\u305b\u3093\u3067\u3057\u305f: $sourcePath\");\n            return false;\n        }\n        \n        \/\/ \u65b0\u3057\u3044\u30b5\u30a4\u30ba\u3092\u8a08\u7b97\n        $ratio = min($maxWidth \/ $width, $maxHeight \/ $height, 1.0);\n        $newWidth = round($width * $ratio);\n        $newHeight = round($height * $ratio);\n        \n        \/\/ \u65b0\u3057\u3044\u753b\u50cf\u3092\u4f5c\u6210\n        $destImage = imagecreatetruecolor($newWidth, $newHeight);\n        \n        \/\/ PNG\u306e\u5834\u5408\u3001\u900f\u904e\u3092\u4fdd\u6301\n        if ($type === IMAGETYPE_PNG) {\n            imagealphablending($destImage, false);\n            imagesavealpha($destImage, true);\n            $transparent = imagecolorallocatealpha($destImage, 0, 0, 0, 127);\n            imagefilledrectangle($destImage, 0, 0, $newWidth, $newHeight, $transparent);\n        }\n        \n        \/\/ \u30ea\u30b5\u30a4\u30ba\n        imagecopyresampled(\n            $destImage, $sourceImage,\n            0, 0, 0, 0,\n            $newWidth, $newHeight, $width, $height\n        );\n        \n        \/\/ \u753b\u50cf\u3092\u4fdd\u5b58\n        $result = match($type) {\n            IMAGETYPE_JPEG =&gt; imagejpeg($destImage, $destPath, $quality),\n            IMAGETYPE_PNG =&gt; imagepng($destImage, $destPath, 9),\n            IMAGETYPE_GIF =&gt; imagegif($destImage, $destPath),\n            default =&gt; false\n        };\n        \n        \/\/ \u30e1\u30e2\u30ea\u89e3\u653e\n        imagedestroy($sourceImage);\n        imagedestroy($destImage);\n        \n        return $result;\n    } catch (Exception $e) {\n        error_log(\"\u753b\u50cf\u30ea\u30b5\u30a4\u30ba\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return false;\n    }\n}\n\n\/**\n * \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u518d\u5e30\u7684\u306b\u914d\u5217\u3068\u3057\u3066\u53d6\u5f97\n * \n * @param string $directory \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30d1\u30b9\n * @param string $pattern \u30d5\u30a1\u30a4\u30eb\u540d\u30d1\u30bf\u30fc\u30f3\uff08glob\u5f62\u5f0f\uff09\n * @param bool $recursive \u30b5\u30d6\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3082\u542b\u3081\u308b\u304b\u3069\u3046\u304b\n * @return array \u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u306e\u914d\u5217\n *\/\nfunction scanDirectoryForFiles(string $directory, string $pattern = '*', bool $recursive = true): array {\n    $directory = rtrim($directory, '\/\\\\') . DIRECTORY_SEPARATOR;\n    $files = [];\n    \n    if (!is_dir($directory)) {\n        error_log(\"\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u5b58\u5728\u3057\u307e\u305b\u3093: $directory\");\n        return [];\n    }\n    \n    try {\n        $items = glob($directory . $pattern);\n        if (is_array($items)) {\n            $files = array_merge($files, $items);\n        }\n        \n        if ($recursive) {\n            $subDirectories = glob($directory . '*', GLOB_ONLYDIR);\n            if (is_array($subDirectories)) {\n                foreach ($subDirectories as $subDirectory) {\n                    $subFiles = scanDirectoryForFiles($subDirectory, $pattern, $recursive);\n                    $files = array_merge($files, $subFiles);\n                }\n            }\n        }\n        \n        return $files;\n    } catch (Exception $e) {\n        error_log(\"\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30b9\u30ad\u30e3\u30f3\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return [];\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n\/\/ \u753b\u50cf\u306e\u30ea\u30b5\u30a4\u30ba\n$originalImage = 'uploads\/original\/photo.jpg';\n$thumbImage = 'uploads\/thumbs\/photo.jpg';\nif (resizeImage($originalImage, $thumbImage, 300, 200)) {\n    echo \"\u30b5\u30e0\u30cd\u30a4\u30eb\u753b\u50cf\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f: $thumbImage\\n\";\n}\n\n\/\/ \u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\n$tempFile = createTempFile('export_', '\u4e00\u6642\u7684\u306a\u30c7\u30fc\u30bf');\nif ($tempFile) {\n    echo \"\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f: $tempFile\\n\";\n    \/\/ \u51e6\u7406\u304c\u7d42\u308f\u3063\u305f\u3089\u524a\u9664\n    safeDeleteFile($tempFile);\n}\n\n\/\/ JPEG\u30d5\u30a1\u30a4\u30eb\u306e\u691c\u7d22\n$jpegFiles = scanDirectoryForFiles('uploads', '*.{jpg,jpeg}', true);\necho count($jpegFiles) . \"\u500b\u306eJPEG\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u3057\u305f\u3002\\n\";\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-190\">\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u306e\u305f\u3081\u306e\u95a2\u6570\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30a2\u306a\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3068\u8a8d\u53ef\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30bf\u30b9\u30af\u3092\u5b89\u5168\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-191\">\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30cf\u30c3\u30b7\u30e5\u5316\u3068\u691c\u8a3c<\/h4>\n\n\n\n<p>\u5b89\u5168\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u7ba1\u7406\u306f\u3001\u73fe\u4ee3\u306e\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3068\u3063\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002PHP\u306b\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30cf\u30c3\u30b7\u30e5\u5316\u3068\u691c\u8a3c\u306e\u305f\u3081\u306e\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u3092\u30e9\u30c3\u30d7\u3057\u3066\u4f7f\u3044\u3084\u3059\u304f\u3059\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=\"\">\/**\n * \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5b89\u5168\u306b\u30cf\u30c3\u30b7\u30e5\u5316\u3059\u308b\n * \n * @param string $password \u5e73\u6587\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\n * @param array $options \u30cf\u30c3\u30b7\u30e5\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\n * @return string|null \u30cf\u30c3\u30b7\u30e5\u5316\u3055\u308c\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u307e\u305f\u306f\u5931\u6557\u6642\u306bnull\n *\/\nfunction secureHashPassword(string $password, array $options = []): ?string {\n    try {\n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u30de\u30fc\u30b8\n        $defaultOptions = [\n            'cost' =&gt; 10, \/\/ \u30b3\u30b9\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf (4-31)\n        ];\n        $options = array_merge($defaultOptions, $options);\n        \n        \/\/ PASSWORD_DEFAULT \u306f\u73fe\u5728\u63a8\u5968\u3055\u308c\u308b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\uff08\u73fe\u5728\u306fBCRYPT\uff09\n        $hash = password_hash($password, PASSWORD_DEFAULT, $options);\n        \n        if ($hash === false) {\n            error_log(\"\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30cf\u30c3\u30b7\u30e5\u5316\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n            return null;\n        }\n        \n        return $hash;\n    } catch (Exception $e) {\n        error_log(\"\u30d1\u30b9\u30ef\u30fc\u30c9\u30cf\u30c3\u30b7\u30e5\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return null;\n    }\n}\n\n\/**\n * \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u691c\u8a3c\u3059\u308b\n * \n * @param string $password \u691c\u8a3c\u3059\u308b\u30d1\u30b9\u30ef\u30fc\u30c9\n * @param string $hash \u30cf\u30c3\u30b7\u30e5\u5316\u3055\u308c\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\n * @return bool \u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u4e00\u81f4\u3059\u308b\u304b\u3069\u3046\u304b\n *\/\nfunction verifyPassword(string $password, string $hash): bool {\n    try {\n        return password_verify($password, $hash);\n    } catch (Exception $e) {\n        error_log(\"\u30d1\u30b9\u30ef\u30fc\u30c9\u691c\u8a3c\u30a8\u30e9\u30fc: \" . $e-&gt;getMessage());\n        return false;\n    }\n}\n\n\/**\n * \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30cf\u30c3\u30b7\u30e5\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\n * \n * @param string $hash \u78ba\u8a8d\u3059\u308b\u30cf\u30c3\u30b7\u30e5\n * @param array $options \u65b0\u3057\u3044\u30cf\u30c3\u30b7\u30e5\u30aa\u30d7\u30b7\u30e7\u30f3\n * @return bool \u66f4\u65b0\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\n *\/\nfunction passwordNeedsRehash(string $hash, array $options = []): bool {\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u30de\u30fc\u30b8\n    $defaultOptions = [\n        'cost' =&gt; 10,\n    ];\n    $options = array_merge($defaultOptions, $options);\n    \n    return password_needs_rehash($hash, PASSWORD_DEFAULT, $options);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n\/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30cf\u30c3\u30b7\u30e5\u5316\n$password = 'secure_password123';\n$hash = secureHashPassword($password);\n\nif ($hash) {\n    echo \"\u30d1\u30b9\u30ef\u30fc\u30c9\u30cf\u30c3\u30b7\u30e5: $hash\\n\";\n    \n    \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\n    $isValid = verifyPassword($password, $hash);\n    echo \"\u30d1\u30b9\u30ef\u30fc\u30c9\u691c\u8a3c\u7d50\u679c: \" . ($isValid ? '\u4e00\u81f4' : '\u4e0d\u4e00\u81f4') . \"\\n\";\n    \n    \/\/ \u9593\u9055\u3063\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u691c\u8a3c\n    $isValid = verifyPassword('wrong_password', $hash);\n    echo \"\u9593\u9055\u3063\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\u7d50\u679c: \" . ($isValid ? '\u4e00\u81f4' : '\u4e0d\u4e00\u81f4') . \"\\n\";\n    \n    \/\/ \u30cf\u30c3\u30b7\u30e5\u306e\u66f4\u65b0\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\uff08\u4f8b: \u30b3\u30b9\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u5897\u3084\u3057\u305f\u5834\u5408\uff09\n    $needsRehash = passwordNeedsRehash($hash, ['cost' =&gt; 12]);\n    if ($needsRehash) {\n        \/\/ \u3088\u308a\u5f37\u529b\u306a\u30cf\u30c3\u30b7\u30e5\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\n        $newHash = secureHashPassword($password, ['cost' =&gt; 12]);\n        echo \"\u30cf\u30c3\u30b7\u30e5\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\\n\";\n    }\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-192\">\u30e6\u30fc\u30b6\u30fc\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u95a2\u6570<\/h4>\n\n\n\n<p>\u591a\u304f\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u7570\u306a\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u7570\u306a\u308b\u6a29\u9650\u3092\u5272\u308a\u5f53\u3066\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u95a2\u6570\u306f\u3001\u30ed\u30fc\u30eb\u30d9\u30fc\u30b9\u306e\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30fc\u30eb\u3068\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u7ba1\u7406\u3059\u308b\u30af\u30e9\u30b9\n *\/\nclass UserPermission {\n    \/\/ \u30ed\u30fc\u30eb\u3068\u305d\u308c\u306b\u95a2\u9023\u3059\u308b\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u30de\u30c3\u30d7\n    private static $rolePermissions = [\n        'guest' =&gt; ['view'],\n        'user' =&gt; ['view', 'create', 'update_own'],\n        'editor' =&gt; ['view', 'create', 'update_own', 'update_any', 'publish'],\n        'admin' =&gt; ['view', 'create', 'update_own', 'update_any', 'publish', 'delete', 'manage_users'],\n        'superadmin' =&gt; ['*'] \/\/ \u3059\u3079\u3066\u306e\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\n    ];\n    \n    \/**\n     * \u30e6\u30fc\u30b6\u30fc\u304c\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u30c1\u30a7\u30c3\u30af\n     * \n     * @param string $userRole \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30fc\u30eb\n     * @param string $permission \u78ba\u8a8d\u3059\u308b\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\n     * @param int|string|null $resourceOwnerId \u30ea\u30bd\u30fc\u30b9\u306e\u6240\u6709\u8005ID\uff08\u6240\u6709\u8005\u30c1\u30a7\u30c3\u30af\u7528\uff09\n     * @param int|string|null $userId \u73fe\u5728\u306e\u30e6\u30fc\u30b6\u30fcID\uff08\u6240\u6709\u8005\u30c1\u30a7\u30c3\u30af\u7528\uff09\n     * @return bool \u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u3042\u308b\u304b\u3069\u3046\u304b\n     *\/\n    public static function hasPermission(\n        string $userRole, \n        string $permission, \n        $resourceOwnerId = null, \n        $userId = null\n    ): bool {\n        \/\/ \u30ed\u30fc\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\n        if (!isset(self::$rolePermissions[$userRole])) {\n            return false;\n        }\n        \n        $permissions = self::$rolePermissions[$userRole];\n        \n        \/\/ \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\uff08\u3059\u3079\u3066\u306e\u6a29\u9650\uff09\n        if (in_array('*', $permissions)) {\n            return true;\n        }\n        \n        \/\/ \u6240\u6709\u8005\u6a29\u9650\u306e\u30c1\u30a7\u30c3\u30af (_own \u30b5\u30d5\u30a3\u30c3\u30af\u30b9\u304c\u3042\u308b\u5834\u5408)\n        if (strpos($permission, '_own') !== false &amp;&amp; $resourceOwnerId !== null &amp;&amp; $userId !== null) {\n            \/\/ \u81ea\u5206\u306e\u30ea\u30bd\u30fc\u30b9\u3067\u306f\u306a\u3044\u5834\u5408\u3001\u5bfe\u5fdc\u3059\u308b _any \u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\n            if ($resourceOwnerId != $userId) {\n                $anyPermission = str_replace('_own', '_any', $permission);\n                return in_array($anyPermission, $permissions);\n            }\n        }\n        \n        \/\/ \u901a\u5e38\u306e\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30c1\u30a7\u30c3\u30af\n        return in_array($permission, $permissions);\n    }\n    \n    \/**\n     * \u30e6\u30fc\u30b6\u30fc\u306b\u30ed\u30fc\u30eb\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u30c1\u30a7\u30c3\u30af\n     * \n     * @param string|array $userRoles \u30e6\u30fc\u30b6\u30fc\u306e\u30ed\u30fc\u30eb\uff08\u6587\u5b57\u5217\u307e\u305f\u306f\u914d\u5217\uff09\n     * @param string|array $requiredRoles \u5fc5\u8981\u306a\u30ed\u30fc\u30eb\uff08\u6587\u5b57\u5217\u307e\u305f\u306f\u914d\u5217\uff09\n     * @param bool $requireAll \u3059\u3079\u3066\u306e\u30ed\u30fc\u30eb\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\n     * @return bool \u30ed\u30fc\u30eb\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\n     *\/\n    public static function hasRole($userRoles, $requiredRoles, bool $requireAll = false): bool {\n        \/\/ \u6587\u5b57\u5217\u3092\u914d\u5217\u306b\u5909\u63db\n        if (is_string($userRoles)) {\n            $userRoles = [$userRoles];\n        }\n        \n        if (is_string($requiredRoles)) {\n            $requiredRoles = [$requiredRoles];\n        }\n        \n        if ($requireAll) {\n            \/\/ \u3059\u3079\u3066\u306e\u30ed\u30fc\u30eb\u304c\u5fc5\u8981\u306a\u5834\u5408\n            foreach ($requiredRoles as $role) {\n                if (!in_array($role, $userRoles)) {\n                    return false;\n                }\n            }\n            return true;\n        } else {\n            \/\/ \u3044\u305a\u308c\u304b\u306e\u30ed\u30fc\u30eb\u304c\u5fc5\u8981\u306a\u5834\u5408\n            foreach ($requiredRoles as $role) {\n                if (in_array($role, $userRoles)) {\n                    return true;\n                }\n            }\n            return false;\n        }\n    }\n    \n    \/**\n     * \u30ed\u30fc\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u53d6\u5f97\n     * \n     * @param string $role \u30ed\u30fc\u30eb\n     * @return array \u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u914d\u5217\n     *\/\n    public static function getRolePermissions(string $role): array {\n        return self::$rolePermissions[$role] ?? [];\n    }\n    \n    \/**\n     * \u30ab\u30b9\u30bf\u30e0\u30ed\u30fc\u30eb\u3068\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\n     * \n     * @param array $rolePermissions \u30ed\u30fc\u30eb\u3068\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u30de\u30c3\u30d7\n     *\/\n    public static function setRolePermissions(array $rolePermissions): void {\n        self::$rolePermissions = $rolePermissions;\n    }\n}\n\n\/**\n * \u30e6\u30fc\u30b6\u30fc\u304c\u7279\u5b9a\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3067\u304d\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u95a2\u6570\n * \n * @param array $user \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\uff08role, id\u3092\u542b\u3080\u914d\u5217\uff09\n * @param string $action \u5b9f\u884c\u3059\u308b\u30a2\u30af\u30b7\u30e7\u30f3\uff08\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\uff09\n * @param array|null $resource \u30a2\u30af\u30bb\u30b9\u3059\u308b\u30ea\u30bd\u30fc\u30b9\uff08owner_id\u3092\u542b\u3080\u914d\u5217\uff09\n * @return bool \u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3067\u304d\u308b\u304b\u3069\u3046\u304b\n *\/\nfunction canUserPerformAction(array $user, string $action, array $resource = null): bool {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u3044\u306a\u3044\u5834\u5408\n    if (empty($user['role'])) {\n        return false;\n    }\n    \n    $resourceOwnerId = $resource['owner_id'] ?? null;\n    $userId = $user['id'] ?? null;\n    \n    return UserPermission::hasPermission($user['role'], $action, $resourceOwnerId, $userId);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$user = [\n    'id' =&gt; 123,\n    'name' =&gt; '\u5c71\u7530\u592a\u90ce',\n    'role' =&gt; 'editor'\n];\n\n$article = [\n    'id' =&gt; 456,\n    'title' =&gt; 'PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30ac\u30a4\u30c9',\n    'owner_id' =&gt; 123 \/\/ \u3053\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u6240\u6709\n];\n\n$otherArticle = [\n    'id' =&gt; 789,\n    'title' =&gt; '\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u306e\u57fa\u672c',\n    'owner_id' =&gt; 456 \/\/ \u5225\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u6240\u6709\n];\n\n\/\/ \u81ea\u5206\u306e\u8a18\u4e8b\u3092\u66f4\u65b0\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\nif (canUserPerformAction($user, 'update_own', $article)) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u81ea\u5206\u306e\u8a18\u4e8b\u3092\u66f4\u65b0\u3067\u304d\u307e\u3059\\n\";\n}\n\n\/\/ \u4ed6\u306e\u4eba\u306e\u8a18\u4e8b\u3092\u66f4\u65b0\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\nif (canUserPerformAction($user, 'update_own', $otherArticle)) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u4ed6\u306e\u4eba\u306e\u8a18\u4e8b\u3092\u66f4\u65b0\u3067\u304d\u307e\u3059\\n\";\n} else {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u4ed6\u306e\u4eba\u306e\u8a18\u4e8b\u3092\u66f4\u65b0\u3067\u304d\u307e\u305b\u3093\\n\";\n}\n\n\/\/ \u8a18\u4e8b\u3092\u516c\u958b\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\nif (canUserPerformAction($user, 'publish')) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u8a18\u4e8b\u3092\u516c\u958b\u3067\u304d\u307e\u3059\\n\";\n}\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u7ba1\u7406\u304c\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\nif (canUserPerformAction($user, 'manage_users')) {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u30e6\u30fc\u30b6\u30fc\u7ba1\u7406\u304c\u3067\u304d\u307e\u3059\\n\";\n} else {\n    echo \"\u30e6\u30fc\u30b6\u30fc\u306f\u30e6\u30fc\u30b6\u30fc\u7ba1\u7406\u304c\u3067\u304d\u307e\u305b\u3093\\n\";\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-193\">\u30bb\u30ad\u30e5\u30a2\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u95a2\u6570<\/h4>\n\n\n\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u306f\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u5074\u9762\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u95a2\u6570\u306f\u3001\u30bb\u30ad\u30e5\u30a2\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30bb\u30ad\u30e5\u30a2\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\u3059\u308b\n * \n * @param array $options \u30bb\u30c3\u30b7\u30e7\u30f3\u30aa\u30d7\u30b7\u30e7\u30f3\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction startSecureSession(array $options = []): bool {\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u30aa\u30d7\u30b7\u30e7\u30f3\n    $defaultOptions = [\n        'cookie_httponly' =&gt; true,     \/\/ JavaScript\u304b\u3089\u306e\u30af\u30c3\u30ad\u30fc\u30a2\u30af\u30bb\u30b9\u3092\u9632\u6b62\n        'cookie_secure' =&gt; true,       \/\/ HTTPS\u3067\u306e\u307f\u30af\u30c3\u30ad\u30fc\u3092\u9001\u4fe1\n        'cookie_samesite' =&gt; 'Lax',    \/\/ \u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5236\u9650\n        'use_strict_mode' =&gt; true,     \/\/ \u53b3\u683c\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u30e2\u30fc\u30c9\u3092\u4f7f\u7528\n        'use_only_cookies' =&gt; true,    \/\/ \u30af\u30c3\u30ad\u30fc\u306e\u307f\u3092\u4f7f\u7528\n        'cookie_lifetime' =&gt; 0,        \/\/ \u30d6\u30e9\u30a6\u30b6\u3092\u9589\u3058\u308b\u3068\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u7d42\u4e86\n        'gc_maxlifetime' =&gt; 3600       \/\/ \u975e\u30a2\u30af\u30c6\u30a3\u30d6\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u751f\u5b58\u6642\u9593\uff081\u6642\u9593\uff09\n    ];\n    \n    \/\/ HTTPS\u3067\u306a\u3044\u5834\u5408\u306f\u8a2d\u5b9a\u3092\u8abf\u6574\n    if (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] !== 'on') {\n        $defaultOptions['cookie_secure'] = false;\n    }\n    \n    \/\/ \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u30de\u30fc\u30b8\n    $sessionOptions = array_merge($defaultOptions, $options);\n    \n    \/\/ \u30bb\u30c3\u30b7\u30e7\u30f3\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\n    foreach ($sessionOptions as $key =&gt; $value) {\n        ini_set(\"session.$key\", $value);\n    }\n    \n    \/\/ \u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\n    if (session_status() === PHP_SESSION_NONE) {\n        return session_start();\n    }\n    \n    return true;\n}\n\n\/**\n * \u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u518d\u751f\u6210\u3059\u308b\uff08\u30bb\u30c3\u30b7\u30e7\u30f3\u56fa\u5b9a\u5316\u653b\u6483\u306e\u9632\u6b62\uff09\n * \n * @param bool $deleteOldSession \u53e4\u3044\u30bb\u30c3\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3059\u308b\u304b\u3069\u3046\u304b\n * @return bool \u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\n *\/\nfunction regenerateSessionId(bool $deleteOldSession = true): bool {\n    return session_regenerate_id($deleteOldSession);\n}\n\n\/**\n * CSRF\u30c8\u30fc\u30af\u30f3\u3092\u751f\u6210\u307e\u305f\u306f\u691c\u8a3c\u3059\u308b\n *\/\nclass CsrfProtection {\n    private const TOKEN_KEY = '_csrf_token';\n    \n    \/**\n     * CSRF\u30c8\u30fc\u30af\u30f3\u3092\u751f\u6210\n     * \n     * @return string \u751f\u6210\u3055\u308c\u305f\u30c8\u30fc\u30af\u30f3\n     *\/\n    public static function generateToken(): string {\n        $token = bin2hex(random_bytes(32));\n        $_SESSION[self::TOKEN_KEY] = $token;\n        return $token;\n    }\n    \n    \/**\n     * CSRF\u30c8\u30fc\u30af\u30f3\u3092\u53d6\u5f97\n     * \n     * @return string|null \u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u30c8\u30fc\u30af\u30f3\u307e\u305f\u306fnull\n     *\/\n    public static function getToken(): ?string {\n        return $_SESSION[self::TOKEN_KEY] ?? null;\n    }\n    \n    \/**\n     * CSRF\u30c8\u30fc\u30af\u30f3\u3092\u691c\u8a3c\n     * \n     * @param string $token \u691c\u8a3c\u3059\u308b\u30c8\u30fc\u30af\u30f3\n     * @param bool $regenerate \u691c\u8a3c\u5f8c\u306b\u65b0\u3057\u3044\u30c8\u30fc\u30af\u30f3\u3092\u751f\u6210\u3059\u308b\u304b\u3069\u3046\u304b\n     * @return bool \u30c8\u30fc\u30af\u30f3\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\n     *\/\n    public static function validateToken(string $token, bool $regenerate = true): bool {\n        $storedToken = self::getToken();\n        \n        if ($storedToken === null) {\n            return false;\n        }\n        \n        $valid = hash_equals($storedToken, $token);\n        \n        if ($valid &amp;&amp; $regenerate) {\n            self::generateToken();\n        }\n        \n        return $valid;\n    }\n    \n    \/**\n     * HTML\u30d5\u30a9\u30fc\u30e0\u7528\u306e\u975e\u8868\u793a\u5165\u529b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u751f\u6210\n     * \n     * @return string HTML\u30b3\u30fc\u30c9\n     *\/\n    public static function generateFormField(): string {\n        $token = self::getToken() ?? self::generateToken();\n        return '&lt;input type=\"hidden\" name=\"csrf_token\" value=\"' . htmlspecialchars($token) . '\"&gt;';\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n\/\/ \u30bb\u30ad\u30e5\u30a2\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\nstartSecureSession();\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u30ed\u30b0\u30a4\u30f3\u5f8c\u306b\u30bb\u30c3\u30b7\u30e7\u30f3ID\u3092\u518d\u751f\u6210\nif ($userLoggedIn) {\n    regenerateSessionId();\n}\n\n\/\/ \u30d5\u30a9\u30fc\u30e0\u306bCSRF\u30c8\u30fc\u30af\u30f3\u3092\u542b\u3081\u308b\necho \"&lt;form method='post'&gt;\\n\";\necho CsrfProtection::generateFormField();\necho \"    &lt;input type='text' name='username'&gt;\\n\";\necho \"    &lt;button type='submit'&gt;\u9001\u4fe1&lt;\/button&gt;\\n\";\necho \"&lt;\/form&gt;\\n\";\n\n\/\/ \u30d5\u30a9\u30fc\u30e0\u9001\u4fe1\u6642\u306bCSRF\u30c8\u30fc\u30af\u30f3\u3092\u691c\u8a3c\nif ($_SERVER['REQUEST_METHOD'] === 'POST') {\n    $csrfToken = $_POST['csrf_token'] ?? '';\n    \n    if (!CsrfProtection::validateToken($csrfToken)) {\n        die('\u7121\u52b9\u306a\u30ea\u30af\u30a8\u30b9\u30c8\uff08CSRF\u30c8\u30fc\u30af\u30f3\u304c\u7121\u52b9\uff09');\n    }\n    \n    \/\/ \u6709\u52b9\u306a\u30c8\u30fc\u30af\u30f3\u306e\u5834\u5408\u3001\u30d5\u30a9\u30fc\u30e0\u51e6\u7406\u3092\u7d9a\u884c...\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-194\">\u307e\u3068\u3081<\/h3>\n\n\n\n<p>\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306ePHP\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f7f\u7528\u3067\u304d\u308b\u5b9f\u8df5\u7684\u306a\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u3001\u4e00\u822c\u7684\u306a\u958b\u767a\u30bf\u30b9\u30af\u3092\u7c21\u7d20\u5316\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u518d\u5229\u7528\u6027\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e0a\u8a18\u306e\u4f8b\u306f\u3001\u3042\u306a\u305f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u76f4\u63a5\u4f7f\u7528\u3059\u308b\u304b\u3001\u7279\u5b9a\u306e\u30cb\u30fc\u30ba\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u3059\u3002\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3063\u305f\u5805\u7262\u306a\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7279\u306b\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u3001\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3001\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u306a\u3069\u306e\u5206\u91ce\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u95a2\u6570\u306f\u65e5\u5e38\u7684\u306a\u958b\u767a\u4f5c\u696d\u3092\u5927\u5e45\u306b\u7c21\u7d20\u5316\u3057\u3001\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3092\u9632\u3050\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u95a2\u6570\u3092\u72ec\u81ea\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3084\u30d8\u30eb\u30d1\u30fc\u30af\u30e9\u30b9\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306b\u6574\u7406\u3055\u308c\u305f\u30b3\u30fc\u30c9\u69cb\u9020\u3092\u5b9f\u73fe\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002 ## \u5b9f\u8df5\u7684\u306aPHP\u95a2\u6570\u306e\u4f7f\u7528\u4f8b<\/p>\n\n\n\n<p>\u3053\u3053\u307e\u3067PHP\u95a2\u6570\u306e\u57fa\u672c\u304b\u3089\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3001\u8a2d\u8a08\u539f\u5247\u3001\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5f79\u7acb\u3064\u5b9f\u8df5\u7684\u306a\u95a2\u6570\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4f8b\u306f\u3001\u65e5\u5e38\u7684\u306aWeb\u958b\u767a\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-195\">\u30c7\u30fc\u30bf\u51e6\u7406\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u51e6\u7406\u306f\u3001\u307b\u3068\u3093\u3069\u306ePHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u6838\u3068\u306a\u308b\u6a5f\u80fd\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u4e00\u822c\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u30bf\u30b9\u30af\u306e\u305f\u3081\u306e\u95a2\u6570\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-196\">\u914d\u5217\u64cd\u4f5c\u306e\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u914d\u5217\u64cd\u4f5c\u3092\u7c21\u7d20\u5316\u3059\u308b\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u308b\u512a\u308c\u305f\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u591a\u6b21\u5143\u914d\u5217\u304b\u3089\u6307\u5b9a\u3055\u308c\u305f\u30ad\u30fc\u306e\u5024\u3092\u62bd\u51fa\u3059\u308b\n *\n * @param array $array \u51e6\u7406\u3059\u308b\u914d\u5217\n * @param string $key \u62bd\u51fa\u3059\u308b\u30ad\u30fc\n * @return array \u62bd\u51fa\u3055\u308c\u305f\u5024\u306e\u914d\u5217\n *\/\nfunction pluck(array $array, string $key): array {\n    return array_map(function($item) use ($key) {\n        return is_array($item) &amp;&amp; isset($item[$key]) ? $item[$key] : null;\n    }, $array);\n}\n\n\/**\n * \u591a\u6b21\u5143\u914d\u5217\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\n *\n * @param array $array \u51e6\u7406\u3059\u308b\u914d\u5217\n * @param string $key \u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\u30ad\u30fc\n * @return array \u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u305f\u914d\u5217\n *\/\nfunction groupBy(array $array, string $key): array {\n    $result = [];\n    \n    foreach ($array as $item) {\n        if (!is_array($item) || !isset($item[$key])) {\n            continue;\n        }\n        \n        $groupKey = $item[$key];\n        \n        if (!isset($result[$groupKey])) {\n            $result[$groupKey] = [];\n        }\n        \n        $result[$groupKey][] = $item;\n    }\n    \n    return $result;\n}\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-197\">\u307e\u3068\u3081: PHP\u95a2\u6570\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/h2>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001PHP\u95a2\u6570\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5e45\u5e83\u3044\u30c8\u30d4\u30c3\u30af\u3092\u63a2\u6c42\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u95a2\u6570\u306e\u5b9a\u7fa9\u3068\u547c\u3073\u51fa\u3057\u65b9\u304b\u3089\u59cb\u307e\u308a\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u306e\u6271\u3044\u65b9\u3001\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u3001\u8a2d\u8a08\u539f\u5247\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u3001\u305d\u3057\u3066\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\u307e\u3067\u3001PHP\u95a2\u6570\u306e\u5168\u4f53\u50cf\u3092\u5305\u62ec\u7684\u306b\u7406\u89e3\u3067\u304d\u305f\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u632f\u308a\u8fd4\u308a\u3001PHP\u95a2\u6570\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053\u306e\u308a\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-198\">\u8a18\u4e8b\u306e\u4e3b\u8981\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306aPHP\u95a2\u6570\u306e\u7406\u89e3<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587\u3068\u547d\u540d\u898f\u5247<\/li>\n\n\n\n<li>\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u65b9\u3068\u30b9\u30b3\u30fc\u30d7\u306e\u6982\u5ff5<\/li>\n\n\n\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u623b\u308a\u5024\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9ad8\u5ea6\u306a\u95a2\u6570\u6a5f\u80fd\u306e\u6d3b\u7528<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u7121\u540d\u95a2\u6570\uff08\u30af\u30ed\u30fc\u30b8\u30e3\uff09\u3068\u305d\u306e\u5fdc\u7528<\/li>\n\n\n\n<li>\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3088\u308b\u30b3\u30fc\u30c9\u306e\u7c21\u7565\u5316<\/li>\n\n\n\n<li>\u518d\u5e30\u95a2\u6570\u306e\u7406\u89e3\u3068\u5b9f\u88c5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u95a2\u6570\u8a2d\u8a08\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u57fa\u3065\u304f\u95a2\u6570\u8a2d\u8a08<\/li>\n\n\n\n<li>\u52b9\u679c\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9f\u8df5\u7684\u306a\u95a2\u6570\u306e\u5b9f\u88c5\u4f8b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u305f\u3081\u306e\u95a2\u6570<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306e\u305f\u3081\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570<\/li>\n\n\n\n<li>\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u306e\u305f\u3081\u306e\u30bb\u30ad\u30e5\u30a2\u306a\u95a2\u6570<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u3001\u305d\u3057\u3066\u5805\u7262\u306aPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u57fa\u76e4\u304c\u3067\u304d\u305f\u3068\u3044\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-199\">\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u305f\u3081\u306e\u95a2\u6570\u6d3b\u7528<\/h3>\n\n\n\n<p>\u95a2\u6570\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u52b9\u7387\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u610f\u8b58\u3057\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u7e70\u308a\u8fd4\u3057\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u306f\u95a2\u6570\u5316\u3059\u308b<\/li>\n\n\n\n<li>\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f5c\u6210\u3059\u308b<\/li>\n\n\n\n<li>\u4e00\u822c\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u62bd\u8c61\u5316\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9069\u5207\u306a\u62bd\u8c61\u5316\u30ec\u30d9\u30eb\u3092\u4fdd\u3064<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306f\u5358\u4e00\u306e\u660e\u78ba\u306a\u76ee\u7684\u3092\u6301\u3064\u3079\u304d<\/li>\n\n\n\n<li>\u95a2\u6570\u540d\u306f\u6a5f\u80fd\u3092\u6b63\u78ba\u306b\u53cd\u6620\u3059\u3079\u304d<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u306f\u5c0f\u3055\u306a\u95a2\u6570\u306b\u5206\u5272\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u578b\u5ba3\u8a00\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u6d3b\u7528\u3059\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>PHP 7\/8\u306e\u578b\u5ba3\u8a00\u30b7\u30b9\u30c6\u30e0\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>PHPDoc\u30b3\u30e1\u30f3\u30c8\u3067\u95a2\u6570\u306e\u76ee\u7684\u3068\u52d5\u4f5c\u3092\u8aac\u660e\u3059\u308b<\/li>\n\n\n\n<li>\u5f15\u6570\u3068\u623b\u308a\u5024\u306e\u671f\u5f85\u5024\u3092\u660e\u78ba\u306b\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u306b\u6ce8\u610f\u3092\u6255\u3046<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4e88\u671f\u3057\u306a\u3044\u5165\u529b\u306b\u5bfe\u3057\u3066\u5805\u7262\u306b\u5bfe\u5fdc\u3059\u308b<\/li>\n\n\n\n<li>\u660e\u78ba\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n\n\n\n<li>\u4f8b\u5916\u3092\u9069\u5207\u306b\u4f7f\u7528\u3057\u3066\u7570\u5e38\u7cfb\u3092\u51e6\u7406\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-200\">PHP\u95a2\u6570\u30de\u30b9\u30bf\u30fc\u3078\u306e\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u57fa\u790e\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u4ee5\u4e0b\u306e\u30b9\u30ad\u30eb\u3084\u77e5\u8b58\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u6982\u5ff5\u3092\u5b66\u3076<\/strong><ul><li>PHP\u3067\u306e\u9ad8\u968e\u95a2\u6570\u306e\u6d3b\u7528\u7d14\u7c8b\u95a2\u6570\u3068\u526f\u4f5c\u7528\u306e\u6700\u5c0f\u5316\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u306e\u305f\u3081\u306e\u95a2\u6570\u7684\u30a2\u30d7\u30ed\u30fc\u30c1<\/li><\/ul><code>\/\/ \u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u4f8b<br>$numbers = [1, 2, 3, 4, 5];<br>$doubled = array_map(fn($n) =&gt; $n * 2, $numbers);<br>$sum = array_reduce($doubled, fn($carry, $n) =&gt; $carry + $n, 0);<\/code><\/li>\n\n\n\n<li><strong>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3068\u95a2\u6570<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30c8\u30e9\u30c6\u30b8\u30fc\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u30c7\u30b3\u30ec\u30fc\u30bf\u30fc\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u4f9d\u5b58\u6027\u6ce8\u5165<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a\uff08TDD\uff09\u3068\u95a2\u6570\u8a2d\u8a08<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u66f8\u304d\u3084\u3059\u3044\u95a2\u6570\u306e\u8a2d\u8a08<\/li>\n\n\n\n<li>\u30e2\u30c3\u30af\u53ef\u80fd\u306a\u4f9d\u5b58\u95a2\u4fc2<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u306e\u7279\u5fb4<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u95a2\u6570\u30b3\u30f3\u30bb\u30d7\u30c8<\/strong>\n<ul class=\"wp-block-list\">\n<li>Laravel, Symfony, WordPress\u306a\u3069\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084CMS\u3067\u306e\u95a2\u6570\u30a2\u30d7\u30ed\u30fc\u30c1<\/li>\n\n\n\n<li>\u30b3\u30a2\u30e9\u30a4\u30d6\u30e9\u30ea\u304b\u3089\u306e\u5b66\u3073<\/li>\n\n\n\n<li>\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u30d1\u30bf\u30fc\u30f3\u306e\u7406\u89e3<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-201\">\u7d99\u7d9a\u7684\u306a\u5b66\u7fd2\u306e\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u30b9\u30ad\u30eb\u3092\u7d99\u7d9a\u7684\u306b\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u304c\u5f79\u7acb\u3061\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/strong>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.php.net\/manual\/ja\/language.functions.php\">PHP\u516c\u5f0f\u30de\u30cb\u30e5\u30a2\u30eb \u2013 \u95a2\u6570<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.php.net\/manual\/ja\/funcref.php\">PHP\u516c\u5f0f\u30de\u30cb\u30e5\u30a2\u30eb \u2013 \u95a2\u6570\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30aa\u30f3\u30e9\u30a4\u30f3\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3068\u30b3\u30fc\u30b9<\/strong>\n<ul class=\"wp-block-list\">\n<li>Laracasts, Codecademy, Udemy\u306a\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0<\/li>\n\n\n\n<li>PHP\u30c8\u30d4\u30c3\u30af\u306b\u7279\u5316\u3057\u305f\u30d6\u30ed\u30b0\u3084\u30cb\u30e5\u30fc\u30b9\u30ec\u30bf\u30fc<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u66f8\u7c4d<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u300cClean Code\u300dby Robert C. Martin\uff08\u30af\u30ea\u30fc\u30f3\u30b3\u30fc\u30c9\u306e\u539f\u5247\uff09<\/li>\n\n\n\n<li>\u300cModern PHP\u300dby Josh Lockhart\uff08\u30e2\u30c0\u30f3PHP\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff09<\/li>\n\n\n\n<li>\u300cPHP Object-Oriented Solutions\u300dby David Powers\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3068\u95a2\u6570\u7684\u30a2\u30d7\u30ed\u30fc\u30c1\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3068\u30d5\u30a9\u30fc\u30e9\u30e0<\/strong>\n<ul class=\"wp-block-list\">\n<li>Stack Overflow<\/li>\n\n\n\n<li>PHP\u306b\u95a2\u3059\u308bGitHub\u30ea\u30dd\u30b8\u30c8\u30ea<\/li>\n\n\n\n<li>PHP\u95a2\u9023\u306e\u30ab\u30f3\u30d5\u30a1\u30ec\u30f3\u30b9\u3068\u8b1b\u6f14\u52d5\u753b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9f\u969b\u306e\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4eba\u6c17\u306e\u3042\u308bPHP\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30fc\u30c9\u3092\u8aad\u3080<\/li>\n\n\n\n<li>\u5c0f\u898f\u6a21\u306a\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u30b3\u30f3\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-202\">PHP\u95a2\u6570\u306e\u672a\u6765<\/h3>\n\n\n\n<p>PHP\u8a00\u8a9e\u306f\u7d99\u7d9a\u7684\u306b\u9032\u5316\u3057\u3066\u304a\u308a\u3001\u95a2\u6570\u306b\u95a2\u3059\u308b\u6a5f\u80fd\u3082\u62e1\u5f35\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5c06\u6765\u7684\u306b\u6ce8\u76ee\u3059\u3079\u304d\u52d5\u5411\u3068\u3057\u3066\u306f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>PHP 8.0\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u540d\u524d\u4ed8\u304d\u5f15\u6570<\/li>\n\n\n\n<li>Union Types<\/li>\n\n\n\n<li>Match\u5f0f<\/li>\n\n\n\n<li>JIT\u30b3\u30f3\u30d1\u30a4\u30eb<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5f71\u97ff<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u64cd\u4f5c<\/li>\n\n\n\n<li>\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u64cd\u4f5c<\/li>\n\n\n\n<li>\u30e2\u30ca\u30c9\u306e\u6982\u5ff5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u306e\u9032\u5316<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u3088\u308a\u53b3\u5bc6\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u95a2\u6570\u306e\u526f\u4f5c\u7528\u306e\u5206\u6790<\/li>\n\n\n\n<li>\u81ea\u52d5\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-203\">\u5b9f\u8df5\u306b\u5411\u3051\u3066\u306e\u52b1\u307e\u3057<\/h3>\n\n\n\n<p>PHP\u306e\u95a2\u6570\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u305f\u3081\u306e\u6700\u3082\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5b66\u3093\u3060\u77e5\u8b58\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5c0f\u3055\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304b\u3089\u59cb\u3081\u308b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f5c\u6210\u3059\u308b<\/li>\n\n\n\n<li>\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u95a2\u6570\u3092\u6539\u5584\u3059\u308b<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u5c0f\u3055\u306a\u30c4\u30fc\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3068\u53cd\u7701<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u81ea\u5206\u306e\u30b3\u30fc\u30c9\u3092\u6279\u5224\u7684\u306b\u898b\u76f4\u3059<\/li>\n\n\n\n<li>\u4ed6\u306e\u4eba\u304b\u3089\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u6c42\u3081\u308b<\/li>\n\n\n\n<li>\u7d99\u7d9a\u7684\u306a\u6539\u5584\u3092\u76ee\u6307\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u30d1\u30bf\u30fc\u30f3\u3068\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u306e\u8a8d\u8b58<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u52b9\u679c\u7684\u306a\u95a2\u6570\u30d1\u30bf\u30fc\u30f3\u3092\u8b58\u5225\u3057\u518d\u5229\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u554f\u984c\u306e\u3042\u308b\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u3092\u8a8d\u8b58\u3057\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u81ea\u5206\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u306b\u7d44\u307f\u8fbc\u3080<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-204\">\u7d50\u3073\u306e\u8a00\u8449<\/h3>\n\n\n\n<p>PHP\u95a2\u6570\u306f\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u57fa\u76e4\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f\u6982\u5ff5\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u958b\u767a\u8005\u306b\u306a\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u95a2\u6570\u306f\u5358\u306a\u308b\u30b3\u30fc\u30c9\u306e\u65ad\u7247\u3067\u306f\u306a\u304f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u69cb\u9020\u3068\u54c1\u8cea\u3092\u5f62\u4f5c\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u95a2\u6570\u3092\u9069\u5207\u306b\u8a2d\u8a08\u3057\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3001\u5358\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u3067\u306f\u306a\u304f\u3001\u512a\u308c\u305f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053\u306f\u7d99\u7d9a\u7684\u306a\u5b66\u7fd2\u3068\u5b9f\u8df5\u306e\u65c5\u3067\u3059\u3002\u4e00\u6b69\u4e00\u6b69\u3001\u7740\u5b9f\u306b\u9032\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u305d\u3046\u3059\u308c\u3070\u3001\u8907\u96d1\u306a\u554f\u984c\u3082\u30a8\u30ec\u30ac\u30f3\u30c8\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u89e3\u6c7a\u7b56\u306b\u5909\u3048\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u95a2\u6570\u306e\u4e16\u754c\u3067\u306e\u6210\u529f\u3092\u304a\u7948\u308a\u3057\u307e\u3059\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: 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