{"id":3710,"date":"2025-04-14T15:14:40","date_gmt":"2025-04-14T06:14:40","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3710"},"modified":"2025-04-14T15:14:42","modified_gmt":"2025-04-14T06:14:42","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91php%e5%a4%89%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e3%82%ac%e3%82%a4%e3%83%89-%e3%82%a8%e3%83%a9%e3%83%bc","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3710","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011PHP\u5909\u6570\u306e\u4f7f\u3044\u65b9\u30de\u30b9\u30bf\u30fc\u30ac\u30a4\u30c9 &#8211; \u30a8\u30e9\u30fc\u3092\u9632\u30507\u3064\u306e\u5b9f\u8df5\u4f8b"},"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\">\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/a>  <\/li>  <li>    <a href=\"#i-1\">PHP\u5909\u6570\u306e\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">\u5909\u6570\u3068\u306f\u4f55\u304b\uff1f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u5f79\u5272<\/a>      <\/li>      <li>        <a href=\"#i-3\">PHP\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u7279\u5fb4\u3068\u4ed6\u8a00\u8a9e\u3068\u306e\u9055\u3044<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-4\">$\u8a18\u53f7\u306e\u610f\u5473\u3068\u6b63\u3057\u3044\u5909\u6570\u540d\u306e\u4ed8\u3051\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-5\">PHP\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-6\">\u5909\u6570\u5ba3\u8a00\u306e\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-7\">\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\u306e\u9078\u629e\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">      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href=\"#i-19\">\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7ba1\u7406<\/a>      <\/li>      <li>        <a href=\"#i-20\">\u591a\u6b21\u5143\u914d\u5217\u3067\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">\u914d\u5217\u64cd\u4f5c\u306e\u5f37\u529b\u306a\u95a2\u6570\u7fa4<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-22\">\u30a8\u30e9\u30fc\u3092\u9632\u3050\uff01PHP\u5909\u6570\u306e7\u3064\u306e\u5b9f\u8df5\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">\u5b9f\u8df5\u4f8b1\uff1a\u672a\u5b9a\u7fa9\u5909\u6570\u306b\u3088\u308b\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-24\">\u5b9f\u8df5\u4f8b2\uff1a\u578b\u306e\u4e0d\u4e00\u81f4\u306b\u3088\u308b\u30d0\u30b0\u3092\u9632\u3050\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      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href=\"#i-30\">\u30d7\u30ed\u306ePHP\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u5b9f\u8df5\u3059\u308b\u5909\u6570\u547d\u540d\u898f\u5247<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-31\">\u8aad\u307f\u3084\u3059\u304f\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u5909\u6570\u540d\u306e\u4ed8\u3051\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-32\">\u30c1\u30fc\u30e0\u3067\u306e\u958b\u767a\u3092\u5186\u6ed1\u306b\u3059\u308b\u547d\u540d\u898f\u7d04<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-33\">\u7279\u6b8a\u306a\u7528\u9014\u306b\u9069\u3057\u305f\u5909\u6570\u540d\u306e\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-34\">PHP\u5909\u6570\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-35\">var_dump()\u3068print_r()\u3092\u4f7f\u3044\u3053\u306a\u3059<\/a>      <\/li>      <li>        <a href=\"#i-36\">\u5909\u6570\u95a2\u9023\u306e\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u89e3\u8aad\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-37\">Xdebug\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067PHP\u5909\u6570\u3092\u52b9\u7387\u7684\u306b\u8ffd\u8de1\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-38\">\u307e\u3068\u3081\uff1aPHP\u5909\u6570\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-39\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u30607\u3064\u306e\u5b9f\u8df5\u4f8b\u306e\u5fa9\u7fd2<\/a>      <\/li>      <li>        <a href=\"#i-40\">\u3055\u3089\u306a\u308b\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306e\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-41\">\u5909\u6570\u306e\u77e5\u8b58\u3092\u6d3b\u304b\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a2\u30a4\u30c7\u30a2<\/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\">\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/h2>\n\n\n\n<p>PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u5909\u6570\u306f\u6700\u3082\u57fa\u672c\u7684\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u6700\u3082\u91cd\u8981\u306a\u8981\u7d20\u306e\u4e00\u3064\u3067\u3059\u3002\u5909\u6570\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u3042\u3089\u3086\u308b\u5834\u6240\u3067\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3001\u64cd\u4f5c\u3001\u8ee2\u9001\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u3001\u305d\u306e\u7406\u89e3\u3068\u9069\u5207\u306a\u4f7f\u7528\u306f\u30a8\u30e9\u30fc\u306e\u306a\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u300c$username\u300d\u3084\u300c$total_price\u300d\u306e\u3088\u3046\u306aPHP\u5909\u6570\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u305d\u306e\u80cc\u5f8c\u306b\u306f\u578b\u30b7\u30b9\u30c6\u30e0\u3001\u30b9\u30b3\u30fc\u30d7\u3001\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306a\u3069\u306e\u91cd\u8981\u306a\u6982\u5ff5\u304c\u96a0\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u3092\u9632\u304e\u3001\u3088\u308a\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u3053\u3068\u3067\u5f97\u3089\u308c\u308b\u77e5\u8b58\u3068\u5b9f\u8df5\u30b9\u30ad\u30eb\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PHP\u5909\u6570\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u306e\u4f53\u7cfb\u7684\u306a\u7406\u89e3<\/li>\n\n\n\n<li>\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3068\u305d\u306e\u5909\u63db\u65b9\u6cd5\u306e\u7fd2\u5f97<\/li>\n\n\n\n<li>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3001\u9759\u7684\u5909\u6570\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051<\/li>\n\n\n\n<li>\u914d\u5217\u5909\u6570\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li>\u73fe\u5834\u3067\u5f79\u7acb\u3064\u5909\u6570\u547d\u540d\u898f\u5247\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u306b\u5f79\u7acb\u3064\u5909\u6570\u95a2\u9023\u306e\u30c4\u30fc\u30eb\u3068\u6280\u6cd5<\/li>\n\n\n\n<li><strong>\u7279\u306b\u91cd\u8981\u306a7\u3064\u306e\u5b9f\u8df5\u4f8b\u3092\u901a\u3058\u305f\u30a8\u30e9\u30fc\u9632\u6b62\u7b56<\/strong><\/li>\n<\/ul>\n\n\n\n<p>PHP 8.x\u3067\u306f\u3001Union\u578b\u3084\u540d\u524d\u4ed8\u304d\u5f15\u6570\u306a\u3069\u3001\u5909\u6570\u306e\u6271\u3044\u306b\u95a2\u3059\u308b\u65b0\u6a5f\u80fd\u3082\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u65b0\u6a5f\u80fd\u306b\u3082\u89e6\u308c\u306a\u304c\u3089\u3001\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3001PHP\u5909\u6570\u306e\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u305f\u3081\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5909\u6570\u306f\u5c0f\u3055\u306a\u90e8\u54c1\u306e\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u305d\u306e\u4f7f\u3044\u65b9\u4e00\u3064\u3067\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3001\u4fdd\u5b88\u6027\u3001\u305d\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3059\u308b\u5b9f\u8df5\u4f8b\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u8eab\u306b\u3064\u3051\u308c\u3070\u3001PHP\u5909\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u306b\u60a9\u307e\u3055\u308c\u308b\u3053\u3068\u306a\u304f\u3001\u30af\u30ea\u30fc\u30f3\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">PHP\u5909\u6570\u306e\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3088\u3046<\/h2>\n\n\n\n<p>PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u59cb\u3081\u308b\u4e0a\u3067\u6700\u521d\u306b\u5b66\u3076\u3079\u304d\u306a\u306e\u304c\u5909\u6570\u306e\u6982\u5ff5\u3067\u3059\u3002\u5909\u6570\u306f\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u540c\u69d8\u3001\u30c7\u30fc\u30bf\u3092\u4e00\u6642\u7684\u306b\u4fdd\u5b58\u3059\u308b\u300c\u5165\u308c\u7269\u300d\u3067\u3059\u304c\u3001PHP\u3067\u306f\u72ec\u81ea\u306e\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u57fa\u672c\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u7b2c\u4e00\u6b69\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u5909\u6570\u3068\u306f\u4f55\u304b\uff1f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u5f79\u5272<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u5909\u6570\u3068\u306f\u3001\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u30e1\u30e2\u30ea\u4e0a\u306e\u9818\u57df\u306b\u4ed8\u3051\u3089\u308c\u305f\u540d\u524d\u306e\u3053\u3068\u3067\u3059\u3002\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u6570\u5024\u3001\u6587\u5b57\u5217\u3001\u914d\u5217\u306a\u3069\u306e\u5024\u306b\u540d\u524d\u3092\u4ed8\u3051\u3066\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3092\u4fdd\u5b58\u3059\u308b\u5909\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u5ba3\u8a00\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=\"\">$username = \"JohnDoe\";\n<\/pre>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u300cJohnDoe\u300d\u3068\u3044\u3046\u6587\u5b57\u5217\u304c\u300c$username\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30e1\u30e2\u30ea\u9818\u57df\u306b\u683c\u7d0d\u3055\u308c\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u306e\u3069\u3053\u304b\u3089\u3067\u3082\u3053\u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u5909\u6570\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u306e\u4e00\u6642\u4fdd\u5b58\u3068\u518d\u5229\u7528<\/li>\n\n\n\n<li>\u8a08\u7b97\u7d50\u679c\u306e\u4fdd\u6301<\/li>\n\n\n\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u72b6\u614b\u7ba1\u7406<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u69cb\u7bc9<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">PHP\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u7279\u5fb4\u3068\u4ed6\u8a00\u8a9e\u3068\u306e\u9055\u3044<\/h3>\n\n\n\n<p>PHP\u306f\u300c\u5f31\u3044\u578b\u4ed8\u3051\u8a00\u8a9e\u300d\u306b\u5206\u985e\u3055\u308c\u3001\u5909\u6570\u306e\u6271\u3044\u65b9\u306b\u72ec\u7279\u306e\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u5ba3\u8a00\u304c\u4e0d\u8981<\/strong>\uff1aJava\u3084C#\u306a\u3069\u3067\u306f<code>int number = 5;<\/code>\u306e\u3088\u3046\u306b\u578b\u3092\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001PHP\u3067\u306f\u5358\u306b<code>$number = 5;<\/code>\u3068\u66f8\u304f\u3060\u3051\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u52d5\u7684\u306a\u578b\u5909\u63db<\/strong>\uff1aPHP\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u7684\u306b\u30c7\u30fc\u30bf\u578b\u3092\u5909\u63db\u3057\u307e\u3059\u3002 <code>$number = 5; \/\/ \u6574\u6570\u578b $number = \"5\"; \/\/ \u540c\u3058\u5909\u6570\u304c\u6587\u5b57\u5217\u578b\u306b<\/code><\/li>\n\n\n\n<li><strong>\u30b9\u30b3\u30fc\u30d7\u30eb\u30fc\u30eb<\/strong>\uff1a\u4ed6\u8a00\u8a9e\u3068\u6bd4\u3079\u3066PHP\u306e\u30b9\u30b3\u30fc\u30d7\u30eb\u30fc\u30eb\u306f\u72ec\u7279\u3067\u3001\u7279\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u6271\u3044\u306b\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u53c2\u7167\u6e21\u3057<\/strong>\uff1a\u5909\u6570\u3092\u53c2\u7167\u3067\u6e21\u3059\u6a5f\u80fd\u304c\u3042\u308a\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">$\u8a18\u53f7\u306e\u610f\u5473\u3068\u6b63\u3057\u3044\u5909\u6570\u540d\u306e\u4ed8\u3051\u65b9<\/h3>\n\n\n\n<p>PHP\u306e\u6700\u3082\u7279\u5fb4\u7684\u306a\u70b9\u306f\u3001\u5168\u3066\u306e\u5909\u6570\u540d\u306e\u524d\u306b\u300c$\u300d\u8a18\u53f7\u3092\u3064\u3051\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u5909\u6570\u3068\u305d\u306e\u4ed6\u306e\u30b3\u30fc\u30c9\u8981\u7d20\uff08\u95a2\u6570\u540d\u3001\u30af\u30e9\u30b9\u540d\u306a\u3069\uff09\u3092\u533a\u5225\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user_id = 1234;     \/\/ \u6b63\u3057\u3044\u5909\u6570\u5ba3\u8a00\nuser_id = 1234;      \/\/ \u30a8\u30e9\u30fc: $\u8a18\u53f7\u304c\u306a\u3044\n<\/pre>\n\n\n\n<p><strong>\u5909\u6570\u540d\u306e\u547d\u540d\u898f\u5247<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u82f1\u6570\u5b57\u3068\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2(_)\u306e\u307f\u4f7f\u7528\u53ef\u80fd<\/li>\n\n\n\n<li>\u6570\u5b57\u3067\u59cb\u3081\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3055\u308c\u308b (<code>$name<\/code> \u3068 <code>$Name<\/code> \u306f\u5225\u306e\u5909\u6570)<\/li>\n<\/ul>\n\n\n\n<p><strong>\u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>camelCase<\/strong>: \u5358\u8a9e\u306e\u5148\u982d\u3092\u5927\u6587\u5b57\u306b\u3059\u308b\uff08\u6700\u521d\u306e\u5358\u8a9e\u306f\u5c0f\u6587\u5b57\uff09 <code>$userName<\/code><\/li>\n\n\n\n<li><strong>snake_case<\/strong>: \u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3067\u5358\u8a9e\u3092\u533a\u5207\u308b <code>$user_name<\/code><\/li>\n\n\n\n<li><strong>descriptive<\/strong>: \u5909\u6570\u306e\u5f79\u5272\u304c\u660e\u78ba\u306b\u308f\u304b\u308b\u540d\u524d\u3092\u3064\u3051\u308b\n<ul class=\"wp-block-list\">\n<li>\u826f\u3044\u4f8b: <code>$total_price<\/code>, <code>$user_email<\/code><\/li>\n\n\n\n<li>\u60aa\u3044\u4f8b: <code>$a<\/code>, <code>$temp<\/code>, <code>$x<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u9069\u5207\u306a\u5909\u6570\u540d\u3092\u4ed8\u3051\u308b\u3053\u3068\u3067\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u3001\u6570\u30f6\u6708\u5f8c\u306b\u81ea\u5206\u306e\u30b3\u30fc\u30c9\u3092\u8aad\u307f\u8fd4\u3059\u969b\u3084\u3001\u30c1\u30fc\u30e0\u3067\u306e\u5171\u540c\u958b\u767a\u306b\u304a\u3044\u3066\u3082\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-5\">PHP\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<p>PHP\u5909\u6570\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3046\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u5ba3\u8a00\u3068\u521d\u671f\u5316\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d0\u30b0\u3092\u6e1b\u3089\u3057\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u5909\u6570\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u5909\u6570\u5ba3\u8a00\u306e\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>PHP\u3067\u306e\u5909\u6570\u5ba3\u8a00\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u6ce8\u610f\u70b9\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u5909\u6570\u5ba3\u8a00\n$user_name = \"\u592a\u90ce\";  \/\/ \u6587\u5b57\u5217\u578b\n$age = 25;           \/\/ \u6574\u6570\u578b\n$is_active = true;   \/\/ \u8ad6\u7406\u578b\uff08\u30d6\u30fc\u30eb\u578b\uff09\n\n\/\/ PHP 7\u4ee5\u964d\u306e\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3057\u305f\u4f8b\nfunction processUser(string $name, int $age): bool {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n    return true;\n}\n\n\/\/ PHP 8\u306eUnion\u578b\u3092\u4f7f\u7528\u3057\u305f\u4f8b\nfunction getData(string|array $data): string|null {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n    return \"\u51e6\u7406\u7d50\u679c\";\n}\n<\/pre>\n\n\n\n<p><strong>\u5909\u6570\u5ba3\u8a00\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5909\u6570\u540d\u306f\u30ed\u30b8\u30c3\u30af\u3092\u53cd\u6620\u3057\u305f\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u306b\u3059\u308b<\/li>\n\n\n\n<li>\u540c\u3058\u7a2e\u985e\u306e\u5909\u6570\u306b\u306f\u4e00\u8cab\u3057\u305f\u547d\u540d\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u4ed6\u306e\u958b\u767a\u8005\u304c\u898b\u3066\u3082\u7406\u89e3\u3067\u304d\u308b\u660e\u78ba\u306a\u540d\u524d\u3092\u9078\u3076<\/li>\n\n\n\n<li>PHP\u306e\u4e88\u7d04\u8a9e\uff08<code>if<\/code>, <code>class<\/code>, <code>function<\/code>\u306a\u3069\uff09\u306f\u5909\u6570\u540d\u306b\u4f7f\u7528\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u5909\u6570\u540d\u306e\u9577\u3055\u3068\u660e\u78ba\u3055\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\u306e\u9078\u629e\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP\u306f\u5f31\u3044\u578b\u4ed8\u3051\u8a00\u8a9e\u3067\u3059\u304c\u3001\u76ee\u7684\u306b\u5408\u3063\u305f\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\u3092\u9078\u3076\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n<div id=\"id-291f1d05-0e64-4286-9bfd-516b2e128832\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30c7\u30fc\u30bf\u306e\u7a2e\u985e<\/th><th>\u63a8\u5968\u3055\u308c\u308b\u578b<\/th><th>\u4f7f\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u6574\u6570\u5024<\/td><td>int<\/td><td>$user_id = 42;<\/td><\/tr><tr><td>\u5c0f\u6570\u3092\u542b\u3080\u6570\u5024<\/td><td>float<\/td><td>$price = 29.99;<\/td><\/tr><tr><td>\u30c6\u30ad\u30b9\u30c8<\/td><td>string<\/td><td>$message = \u201c\u3053\u3093\u306b\u3061\u306f\u201d;<\/td><\/tr><tr><td>\u771f\u507d\u5024<\/td><td>bool<\/td><td>$is_admin = false;<\/td><\/tr><tr><td>\u8907\u6570\u306e\u5024\u306e\u96c6\u5408<\/td><td>array<\/td><td>$colors = [\u201cred\u201d, \u201cblue\u201d];<\/td><\/tr><tr><td>\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2<\/td><td>array\uff08\u9023\u60f3\u914d\u5217\uff09<\/td><td>$user = [\u201cname\u201d =&gt; \u201c\u592a\u90ce\u201d, \u201cage\u201d =&gt; 25];<\/td><\/tr><tr><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411<\/td><td>object<\/td><td>$product = new Product();<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>PHP 7\u4ee5\u964d\u3067\u306f\u3001\u95a2\u6570\u306e\u5f15\u6570\u3084\u623b\u308a\u5024\u306b\u578b\u5ba3\u8a00\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u610f\u56f3\u3057\u306a\u3044\u578b\u306e\u30c7\u30fc\u30bf\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u3092\u9632\u3052\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d0\u30b0\u306e\u767a\u751f\u3092\u5927\u5e45\u306b\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u5909\u6570\u306e\u521d\u671f\u5316\u304c\u91cd\u8981\u306a\u7406\u7531\u3068\u305d\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5909\u6570\u306e\u521d\u671f\u5316\u3068\u306f\u3001\u5909\u6570\u306b\u6700\u521d\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u9069\u5207\u306a\u521d\u671f\u5316\u3092\u884c\u308f\u306a\u3044\u3068\u3001\u672a\u5b9a\u7fa9\u5909\u6570\u306e\u30a8\u30e9\u30fc\u3084\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u826f\u3044\u4f8b\uff1a\u4f7f\u7528\u524d\u306b\u5909\u6570\u3092\u521d\u671f\u5316\n$total = 0;\nforeach ($items as $item) {\n    $total += $item['price'];\n}\n\n\/\/ \u60aa\u3044\u4f8b\uff1a\u521d\u671f\u5316\u3057\u3066\u3044\u306a\u3044\u5909\u6570\u3092\u4f7f\u7528\nfunction calculateTotal($items) {\n    foreach ($items as $item) {\n        $total += $item['price']; \/\/ Warning: Undefined variable $total\n    }\n    return $total;\n}\n<\/pre>\n\n\n\n<p><strong>\u521d\u671f\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u660e\u793a\u7684\u306a\u521d\u671f\u5316<\/strong>\uff1a\u5909\u6570\u306f\u4f7f\u7528\u524d\u306b\u5fc5\u305a\u521d\u671f\u5316\u3059\u308b<\/li>\n\n\n\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a<\/strong>\uff1a\u95a2\u6570\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3059\u308b <code>function greet($name = \"\u30b2\u30b9\u30c8\") { return \"\u3053\u3093\u306b\u3061\u306f\u3001{$name}\u3055\u3093\";}<\/code><\/li>\n\n\n\n<li><strong>NULL\u5408\u4f53\u6f14\u7b97\u5b50\u306e\u6d3b\u7528<\/strong>\uff1a\u5909\u6570\u304c\u672a\u5b9a\u7fa9\u306e\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u7c21\u6f54\u306b\u8a2d\u5b9a\uff08PHP 7\u4ee5\u964d\uff09 <code>$username = $_GET['user'] ?? '\u30c7\u30d5\u30a9\u30eb\u30c8\u30e6\u30fc\u30b6\u30fc';<\/code><\/li>\n\n\n\n<li><strong>\u578b\u3092\u8003\u616e\u3057\u305f\u521d\u671f\u5316<\/strong>\uff1a\u76ee\u7684\u306b\u5408\u3063\u305f\u521d\u671f\u5024\u3092\u8a2d\u5b9a\u3059\u308b\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u306e\u5408\u8a08\u3092\u8a08\u7b97\u3059\u308b\u5909\u6570\u306f0\u3067\u521d\u671f\u5316<\/li>\n\n\n\n<li>\u6587\u5b57\u5217\u3092\u9023\u7d50\u3059\u308b\u5909\u6570\u306f\u7a7a\u6587\u5b57\u5217(\u201c\u201d)\u3067\u521d\u671f\u5316<\/li>\n\n\n\n<li>\u914d\u5217\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u7a7a\u914d\u5217([])\u3067\u521d\u671f\u5316<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u9069\u5207\u306a\u5909\u6570\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306f\u3001\u30a8\u30e9\u30fc\u9632\u6b62\u306e\u57fa\u672c\u3067\u3042\u308a\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u54c1\u8cea\u3092\u5927\u304d\u304f\u5de6\u53f3\u3057\u307e\u3059\u3002\u7279\u306b\u30c1\u30fc\u30e0\u958b\u767a\u306b\u304a\u3044\u3066\u306f\u3001\u4e00\u8cab\u6027\u306e\u3042\u308b\u5909\u6570\u306e\u5ba3\u8a00\u30fb\u521d\u671f\u5316\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">PHP\u5909\u6570\u306e\u578b\u3068\u30ad\u30e3\u30b9\u30c8<\/h2>\n\n\n\n<p>PHP\u5909\u6570\u306e\u7279\u5fb4\u306e\u4e00\u3064\u306f\u300c\u5f31\u3044\u578b\u4ed8\u3051\u300d\u3067\u3059\u304c\u3001\u3053\u308c\u306f\u30c7\u30fc\u30bf\u578b\u304c\u91cd\u8981\u3067\u306a\u3044\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3080\u3057\u308d\u578b\u306e\u7406\u89e3\u306f\u30a8\u30e9\u30fc\u9632\u6b62\u3068\u30b3\u30fc\u30c9\u306e\u6700\u9069\u5316\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u306e\u30c7\u30fc\u30bf\u578b\u3068\u305d\u306e\u5909\u63db\uff08\u30ad\u30e3\u30b9\u30c8\uff09\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">PHP\u306b\u304a\u3051\u308b\u4e3b\u8981\u306a\u30c7\u30fc\u30bf\u578b\u306e\u7406\u89e3<\/h3>\n\n\n\n<p>PHP\u306b\u306f\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u30c7\u30fc\u30bf\u578b\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>\u30b9\u30ab\u30e9\u30fc\u578b\uff08\u57fa\u672c\u578b\uff09<\/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=\"\">$integer = 42;             \/\/ \u6574\u6570\u578b\n$float = 3.14;             \/\/ \u5c0f\u6570\u70b9\u3092\u542b\u3080\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\n$string = \"\u3053\u3093\u306b\u3061\u306f\";     \/\/ \u6587\u5b57\u5217\u578b\n$boolean = true;           \/\/ \u8ad6\u7406\u578b\uff08true\/false\uff09\n<\/pre>\n\n\n\n<p><strong>\u8907\u5408\u578b<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$array = [1, 2, 3];        \/\/ \u914d\u5217\u578b\n$associative = [           \/\/ \u9023\u60f3\u914d\u5217\n    \"name\" =&gt; \"\u9234\u6728\",\n    \"age\" =&gt; 30\n];\n$object = new stdClass();  \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\n<\/pre>\n\n\n\n<p><strong>\u7279\u6b8a\u578b<\/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=\"\">$null = null;              \/\/ NULL\u578b\uff08\u5024\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u8868\u3059\uff09\n$resource = fopen(\"file.txt\", \"r\");  \/\/ \u30ea\u30bd\u30fc\u30b9\u578b\n$callable = function() { return \"Hello\"; };  \/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u578b\n<\/pre>\n\n\n\n<p><strong>PHP 8\u306e\u65b0\u3057\u3044\u578b\u6a5f\u80fd<\/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=\"\">\/\/ Union\u578b\uff08PHP 8.0\u4ee5\u964d\uff09\nfunction process(string|int $input): string|null {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}\n\n\/\/ mixed\u578b\uff08PHP 8.0\u4ee5\u964d\uff09- \u3042\u3089\u3086\u308b\u578b\u3092\u53d7\u3051\u5165\u308c\u308b\nfunction handleData(mixed $data): void {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u578b\u306e\u81ea\u52d5\u5909\u63db\uff08\u30ad\u30e3\u30b9\u30c6\u30a3\u30f3\u30b0\uff09\u306e\u30e1\u30ab\u30cb\u30ba\u30e0<\/h3>\n\n\n\n<p>PHP\u306f\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u7684\u306b\u578b\u3092\u5909\u63db\u3059\u308b\u7279\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u4fbf\u5229\u306a\u53cd\u9762\u3001\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u306e\u539f\u56e0\u306b\u3082\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6587\u5b57\u5217\u3068\u6570\u5024\u306e\u52a0\u7b97\n$number = 5;\n$string = \"10\";\n$result = $number + $string;  \/\/ \u7d50\u679c\u306f\u6574\u6570 15\uff08\u6587\u5b57\u5217\u304c\u81ea\u52d5\u7684\u306b\u6574\u6570\u306b\u5909\u63db\u3055\u308c\u308b\uff09\n\n\/\/ \u7570\u306a\u308b\u578b\u306e\u6bd4\u8f03\n$comparison1 = (5 == \"5\");    \/\/ true\uff08\u5024\u306e\u307f\u3092\u6bd4\u8f03\uff09\n$comparison2 = (5 === \"5\");   \/\/ false\uff08\u5024\u3068\u578b\u3092\u53b3\u5bc6\u306b\u6bd4\u8f03\uff09\n\n\/\/ \u6587\u5b57\u5217\u9023\u7d50\u6642\u306e\u578b\u5909\u63db\n$greeting = \"\u3053\u3093\u306b\u3061\u306f\" . 123;  \/\/ \"\u3053\u3093\u306b\u3061\u306f123\"\uff08\u6570\u5024\u304c\u6587\u5b57\u5217\u306b\u5909\u63db\u3055\u308c\u308b\uff09\n<\/pre>\n\n\n\n<p>\u81ea\u52d5\u5909\u63db\u306e\u6319\u52d5\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30eb\u30fc\u30eb\u3092\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u6f14\u7b97\u3067\u306f\u3001\u6587\u5b57\u5217\u306f\u53ef\u80fd\u306a\u9650\u308a\u6570\u5024\u306b\u5909\u63db\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u6587\u5b57\u5217\u9023\u7d50\u3067\u306f\u3001\u6570\u5024\u306f\u6587\u5b57\u5217\u306b\u5909\u63db\u3055\u308c\u308b<\/li>\n\n\n\n<li><code>==<\/code>\uff08\u7b49\u4fa1\u6f14\u7b97\u5b50\uff09\u306f\u578b\u5909\u63db\u5f8c\u306b\u6bd4\u8f03\u3001<code>===<\/code>\uff08\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff09\u306f\u578b\u3082\u542b\u3081\u3066\u6bd4\u8f03<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u610f\u56f3\u7684\u306a\u578b\u5909\u63db\u3092\u884c\u3046\u5b89\u5168\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u81ea\u52d5\u5909\u63db\u306b\u983c\u308b\u3068\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308b\u305f\u3081\u3001\u660e\u793a\u7684\u306a\u578b\u5909\u63db\u3092\u884c\u3046\u3079\u304d\u3067\u3059\uff1a<\/p>\n\n\n\n<p><strong>\u30ad\u30e3\u30b9\u30c8\u6f14\u7b97\u5b50\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=\"\">$string_value = \"42\";\n$int_value = (int)$string_value;    \/\/ \u6587\u5b57\u5217\u304b\u3089\u6574\u6570\u3078\n$float_value = (float)\"3.14\";       \/\/ \u6587\u5b57\u5217\u304b\u3089\u6d6e\u52d5\u5c0f\u6570\u70b9\u3078\n$string_number = (string)42;        \/\/ \u6574\u6570\u304b\u3089\u6587\u5b57\u5217\u3078\n$bool_value = (bool)1;              \/\/ \u6574\u6570\u304b\u3089\u8ad6\u7406\u5024\u3078\n<\/pre>\n\n\n\n<p><strong>\u578b\u5909\u63db\u95a2\u6570\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=\"\">$int_value = intval(\"42\");          \/\/ \u6587\u5b57\u5217\u304b\u3089\u6574\u6570\u3078\n$float_value = floatval(\"3.14\");    \/\/ \u6587\u5b57\u5217\u304b\u3089\u6d6e\u52d5\u5c0f\u6570\u70b9\u3078\n$string_value = strval(42);         \/\/ \u6574\u6570\u304b\u3089\u6587\u5b57\u5217\u3078\n<\/pre>\n\n\n\n<p><strong>\u578b\u691c\u67fb\u3068\u6761\u4ef6\u4ed8\u304d\u5909\u63db<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5b89\u5168\u306a\u578b\u5909\u63db\u306e\u30d1\u30bf\u30fc\u30f3\nif (is_numeric($input)) {\n    $number = intval($input);\n} else {\n    $number = 0;  \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\n}\n\n\/\/ \u578b\u30c1\u30a7\u30c3\u30af\u95a2\u6570\u306e\u4f8b\n$check1 = is_int(5);         \/\/ true\n$check2 = is_string(\"abc\");  \/\/ true\n$check3 = is_array([1,2,3]); \/\/ true\n<\/pre>\n\n\n\n<p>\u578b\u5909\u63db\u3092\u9069\u5207\u306b\u884c\u3046\u3053\u3068\u3067\u3001\u300c\u60f3\u5b9a\u5916\u306e\u578b\u306b\u3088\u308b\u30a8\u30e9\u30fc\u300d\u3084\u300c\u30c7\u30fc\u30bf\u306e\u4e0d\u6574\u5408\u300d\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3084\u5916\u90e8\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306f\u3001\u5e38\u306b\u578b\u3092\u691c\u8a3c\u3057\u3001\u660e\u793a\u7684\u306a\u5909\u63db\u3092\u884c\u3046\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u30b9\u30b3\u30fc\u30d7\u3068\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0 \u2013 \u5909\u6570\u306e\u6709\u52b9\u7bc4\u56f2\u3092\u5236\u5fa1\u3059\u308b<\/h2>\n\n\n\n<p>PHP\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u3001\u5909\u6570\u304c\u6709\u52b9\uff08\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\uff09\u306a\u7bc4\u56f2\u306e\u3053\u3068\u3067\u3059\u3002\u30b9\u30b3\u30fc\u30d7\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u5909\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u3092\u6e1b\u3089\u3057\u3001\u3088\u308a\u69cb\u9020\u5316\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u4e3b\u306b2\u7a2e\u985e\u306e\u30b9\u30b3\u30fc\u30d7\u304c\u5b58\u5728\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>\u30ed\u30fc\u30ab\u30eb\u5909\u6570<\/strong>\uff1a\u95a2\u6570\u5185\u3067\u5ba3\u8a00\u3055\u308c\u305f\u5909\u6570\u306f\u3001\u305d\u306e\u95a2\u6570\u5185\u3067\u306e\u307f\u6709\u52b9\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 calculateTotal() {\n    $price = 1000;  \/\/ \u30ed\u30fc\u30ab\u30eb\u5909\u6570\n    $tax = 0.1;     \/\/ \u30ed\u30fc\u30ab\u30eb\u5909\u6570\n    return $price * (1 + $tax);\n}\n\necho calculateTotal();  \/\/ 1100\necho $price;           \/\/ \u30a8\u30e9\u30fc: Undefined variable $price\n<\/pre>\n\n\n\n<p><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/strong>\uff1a\u95a2\u6570\u5916\u3067\u5ba3\u8a00\u3055\u308c\u305f\u5909\u6570\u306f\u3001\u95a2\u6570\u5916\u3067\u306e\u307f\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$username = \"admin\";  \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\n\nfunction displayWelcome() {\n    \/\/ \u95a2\u6570\u5185\u304b\u3089\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f'global'\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u5fc5\u8981\n    global $username;\n    echo \"\u3088\u3046\u3053\u305d\u3001{$username}\u3055\u3093\";\n}\n\ndisplayWelcome();  \/\/ \"\u3088\u3046\u3053\u305d\u3001admin\u3055\u3093\"\n<\/pre>\n\n\n\n<p><strong>\u4f7f\u3044\u5206\u3051\u306e\u30dd\u30a4\u30f3\u30c8<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u95a2\u6570\u5185\u3067\u306e\u4e00\u6642\u7684\u306a\u8a08\u7b97\u3084\u51e6\u7406\u306b\u9069\u3057\u3066\u3044\u307e\u3059<\/li>\n\n\n\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u8907\u6570\u306e\u95a2\u6570\u9593\u3067\u5171\u6709\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u91cd\u8981\u306a\u5024\u306b\u4f7f\u7528\u3057\u307e\u3059<\/li>\n\n\n\n<li>\u305f\u3060\u3057\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u904e\u5270\u306a\u4f7f\u7528\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u305f\u3081\u3001\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u3068\u3069\u3081\u308b\u3079\u304d\u3067\u3059<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u95a2\u6570\u5185\u3067\u306e\u5909\u6570\u30b9\u30b3\u30fc\u30d7\u306e\u52d5\u4f5c\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>PHP\u306e\u95a2\u6570\u306f\u72ec\u81ea\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u6301\u3061\u3001\u5916\u90e8\u306e\u5909\u6570\u306b\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=\"\">$count = 1;  \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\n\nfunction increment() {\n    $count++;  \/\/ \u30a8\u30e9\u30fc: Undefined variable $count\n    \/\/ \u3053\u308c\u306f\u95a2\u6570\u5185\u306e\u65b0\u3057\u3044\u30ed\u30fc\u30ab\u30eb\u5909\u6570$count\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\n}\n\nincrement();\necho $count;  \/\/ 1\uff08\u5909\u66f4\u3055\u308c\u3066\u3044\u306a\u3044\uff09\n<\/pre>\n\n\n\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f3\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>global\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b<\/strong>\uff1a<\/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 increment() {\n    global $count;  \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570$count\u306b\u30a2\u30af\u30bb\u30b9\n    $count++;\n}\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>$GLOBALS\u30b9\u30fc\u30d1\u30fc\u30b0\u30ed\u30fc\u30d0\u30eb\u914d\u5217\u3092\u4f7f\u7528\u3059\u308b<\/strong>\uff1a<\/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 increment() {\n    $GLOBALS['count']++;  \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n}\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5f15\u6570\u3068\u623b\u308a\u5024\u3092\u4f7f\u7528\u3059\u308b\uff08\u63a8\u5968\uff09<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function increment($value) {\n    return $value + 1;  \/\/ \u526f\u4f5c\u7528\u306e\u306a\u3044\u7d14\u7c8b\u306a\u95a2\u6570\n}\n$count = increment($count);  \/\/ \u5024\u3092\u66f4\u65b0\n<\/pre>\n\n\n\n<p>\u5f15\u6570\u3068\u623b\u308a\u5024\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306f\u3001\u95a2\u6570\u306e\u4f9d\u5b58\u95a2\u4fc2\u304c\u660e\u793a\u7684\u306b\u306a\u308b\u305f\u3081\u3001\u6700\u3082\u63a8\u5968\u3055\u308c\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">static\u5909\u6570\u3092\u6d3b\u7528\u3057\u305f\u30b9\u30b3\u30fc\u30d7\u306e\u62e1\u5f35\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>static\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u9593\u3067\u5024\u3092\u4fdd\u6301\u3059\u308b\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\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 counter() {\n    static $count = 0;  \/\/ \u521d\u671f\u5316\u306f\u6700\u521d\u306e\u547c\u3073\u51fa\u3057\u6642\u306e\u307f\u5b9f\u884c\n    return ++$count;\n}\n\necho counter();  \/\/ 1\necho counter();  \/\/ 2\necho counter();  \/\/ 3\n<\/pre>\n\n\n\n<p>static\u5909\u6570\u306e\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u304c\u7d42\u4e86\u3057\u3066\u3082\u5024\u304c\u7834\u68c4\u3055\u308c\u306a\u3044<\/li>\n\n\n\n<li>\u521d\u671f\u5316\u306f\u4e00\u5ea6\u3060\u3051\u884c\u308f\u308c\u308b<\/li>\n\n\n\n<li>\u95a2\u6570\u306e\u5916\u90e8\u304b\u3089\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6d3b\u7528\u30b7\u30fc\u30f3<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u547c\u3073\u51fa\u3057\u56de\u6570\u306e\u30ab\u30a6\u30f3\u30c8<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u5024\u306e\u4fdd\u6301<\/li>\n\n\n\n<li>\u30e6\u30cb\u30fc\u30afID\u306e\u751f\u6210<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function generateUniqueId($prefix = '') {\n    static $lastId = 0;\n    return $prefix . ++$lastId;\n}\n\necho generateUniqueId('user_');  \/\/ \"user_1\"\necho generateUniqueId('user_');  \/\/ \"user_2\"\n<\/pre>\n\n\n\n<p>\u30b9\u30fc\u30d1\u30fc\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\uff08$_GET, $_POST, $_SESSION, $_COOKIE, $_SERVER\u7b49\uff09\u306f\u7279\u5225\u306a\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3067\u3042\u308a\u3001\u3059\u3079\u3066\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u5e38\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3067\u3059\u3002\u3053\u308c\u3089\u306fPHP\u306b\u3088\u3063\u3066\u81ea\u52d5\u7684\u306b\u5b9a\u7fa9\u3055\u308c\u3001\u7279\u5b9a\u306e\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3068\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\u3067\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u660e\u78ba\u306b\u610f\u8b58\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">\u914d\u5217\u5909\u6570\u306e\u30d1\u30ef\u30fc\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5<\/h2>\n\n\n\n<p>PHP\u306b\u304a\u3051\u308b\u914d\u5217\u306f\u5358\u306a\u308b\u30c7\u30fc\u30bf\u306e\u96c6\u5408\u4ee5\u4e0a\u306e\u3082\u306e\u3067\u3042\u308a\u3001\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\u3067\u304d\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u52b9\u7387\u6027\u3068\u53ef\u8aad\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u914d\u5217\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u57fa\u672c<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u3001\u914d\u5217\u3092\u5ba3\u8a00\u30fb\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5\u304c\u3044\u304f\u3064\u304b\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=\"\">\/\/ \u5f93\u6765\u306e\u65b9\u6cd5\n$fruits = array(\"\u308a\u3093\u3054\", \"\u30d0\u30ca\u30ca\", \"\u30aa\u30ec\u30f3\u30b8\");\n\n\/\/ PHP 5.4\u4ee5\u964d\u306e\u77ed\u7e2e\u69cb\u6587\uff08\u63a8\u5968\uff09\n$fruits = [\"\u308a\u3093\u3054\", \"\u30d0\u30ca\u30ca\", \"\u30aa\u30ec\u30f3\u30b8\"];\n\n\/\/ \u7a7a\u306e\u914d\u5217\u3092\u4f5c\u6210\n$cart = [];\n\n\/\/ \u8981\u7d20\u3092\u8ffd\u52a0\n$cart[] = \"\u5546\u54c1A\";  \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b90\u306b\u8ffd\u52a0\n$cart[] = \"\u5546\u54c1B\";  \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u306b\u8ffd\u52a0\n\n\/\/ \u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u8981\u7d20\u3092\u8ffd\u52a0\n$ratings[5] = 4.5;  \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b95\u306b\u5024\u3092\u8a2d\u5b9a\n<\/pre>\n\n\n\n<p>PHP\u306e\u914d\u5217\u306f\u30b5\u30a4\u30ba\u3092\u4e8b\u524d\u306b\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u3001\u52d5\u7684\u306b\u62e1\u5f35\u3067\u304d\u308b\u305f\u3081\u67d4\u8edf\u6027\u304c\u9ad8\u3044\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u7ba1\u7406<\/h3>\n\n\n\n<p>\u9023\u60f3\u914d\u5217\u306f\u3001\u6570\u5024\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4ee3\u308f\u308a\u306b\u610f\u5473\u306e\u3042\u308b\u30ad\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u76f4\u611f\u7684\u306b\u30c7\u30fc\u30bf\u3092\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u9023\u60f3\u914d\u5217\u3067\u8868\u73fe\n$user = [\n    \"id\" =&gt; 101,\n    \"name\" =&gt; \"\u5c71\u7530\u592a\u90ce\",\n    \"email\" =&gt; \"yamada@example.com\",\n    \"active\" =&gt; true\n];\n\n\/\/ \u5024\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $user[\"name\"];  \/\/ \"\u5c71\u7530\u592a\u90ce\"\n\n\/\/ \u8981\u7d20\u306e\u8ffd\u52a0\u30fb\u66f4\u65b0\n$user[\"role\"] = \"admin\";\n$user[\"last_login\"] = \"2023-04-14\";\n<\/pre>\n\n\n\n<p>\u9023\u60f3\u914d\u5217\u306e\u4e3b\u306a\u5229\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u306e\u610f\u5473\u304c\u660e\u78ba\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u30ad\u30fc\u3067\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u305f\u3081\u52b9\u7387\u7684<\/li>\n\n\n\n<li>JSON\u3068\u306e\u76f8\u4e92\u5909\u63db\u304c\u5bb9\u6613\uff08API\u9023\u643a\u306b\u6700\u9069\uff09<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3088\u3046\u306a\u69cb\u9020\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u308b<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ JSON\u304b\u3089PHP\u914d\u5217\u3078\n$json_data = '{\"name\":\"\u9234\u6728\",\"age\":28}';\n$person = json_decode($json_data, true);  \/\/ \u7b2c2\u5f15\u6570true\u3067\u9023\u60f3\u914d\u5217\u3068\u3057\u3066\u53d6\u5f97\n\n\/\/ PHP\u914d\u5217\u304b\u3089JSON\u3078\n$json_output = json_encode($user);  \/\/ JSON\u306b\u5909\u63db\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u591a\u6b21\u5143\u914d\u5217\u3067\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u591a\u6b21\u5143\u914d\u5217\u3092\u4f7f\u3046\u3068\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u73fe\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=\"\">\/\/ \u5546\u54c1\u30ab\u30c6\u30b4\u30ea\u3068\u305d\u306e\u5546\u54c1\u306e\u30ea\u30b9\u30c8\n$inventory = [\n    \"\u96fb\u5b50\u6a5f\u5668\" =&gt; [\n        [\"name\" =&gt; \"\u30ce\u30fc\u30c8PC\", \"price\" =&gt; 89800, \"stock\" =&gt; 15],\n        [\"name\" =&gt; \"\u30bf\u30d6\u30ec\u30c3\u30c8\", \"price\" =&gt; 49800, \"stock\" =&gt; 42]\n    ],\n    \"\u66f8\u7c4d\" =&gt; [\n        [\"name\" =&gt; \"PHP\u5165\u9580\", \"price\" =&gt; 2800, \"stock\" =&gt; 24],\n        [\"name\" =&gt; \"Web\u30c7\u30b6\u30a4\u30f3\u96c6\", \"price\" =&gt; 3200, \"stock\" =&gt; 8]\n    ]\n];\n\n\/\/ \u591a\u6b21\u5143\u914d\u5217\u3078\u306e\u30a2\u30af\u30bb\u30b9\necho $inventory[\"\u96fb\u5b50\u6a5f\u5668\"][0][\"name\"];  \/\/ \"\u30ce\u30fc\u30c8PC\"\necho $inventory[\"\u66f8\u7c4d\"][1][\"price\"];     \/\/ 3200\n<\/pre>\n\n\n\n<p><strong>\u591a\u6b21\u5143\u914d\u5217\u306e\u6d3b\u7528\u30b7\u30fc\u30f3<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30ec\u30b3\u30fc\u30c9\u30bb\u30c3\u30c8\u306e\u683c\u7d0d<\/li>\n\n\n\n<li>\u968e\u5c64\u5316\u3055\u308c\u305f\u30e1\u30cb\u30e5\u30fc\u69cb\u9020<\/li>\n\n\n\n<li>\u8868\u5f62\u5f0f\u30c7\u30fc\u30bf\uff08\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u306e\u3088\u3046\u306a\u69cb\u9020\uff09<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u6574\u7406<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u914d\u5217\u64cd\u4f5c\u306e\u5f37\u529b\u306a\u95a2\u6570\u7fa4<\/h3>\n\n\n\n<p>PHP\u306b\u306f\u914d\u5217\u3092\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u304c\u8c4a\u5bcc\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8981\u7d20\u306e\u8ffd\u52a0\u3068\u524a\u9664\narray_push($fruits, \"\u3044\u3061\u3054\");      \/\/ \u672b\u5c3e\u306b\u8ffd\u52a0\n$last = array_pop($fruits);         \/\/ \u672b\u5c3e\u304b\u3089\u524a\u9664\u3057\u3066\u53d6\u5f97\n$first = array_shift($fruits);      \/\/ \u5148\u982d\u304b\u3089\u524a\u9664\u3057\u3066\u53d6\u5f97\narray_unshift($fruits, \"\u30e1\u30ed\u30f3\");   \/\/ \u5148\u982d\u306b\u8ffd\u52a0\n\n\/\/ \u691c\u7d22\u3068\u78ba\u8a8d\n$exists = in_array(\"\u30d0\u30ca\u30ca\", $fruits);           \/\/ \u5024\u306e\u5b58\u5728\u78ba\u8a8d\n$key_exists = array_key_exists(\"name\", $user);   \/\/ \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\n\n\/\/ \u914d\u5217\u306e\u5909\u63db\uff08\u9ad8\u968e\u95a2\u6570\uff09\n$prices = [100, 200, 300];\n$tax_included = array_map(function($price) {\n    return $price * 1.1;  \/\/ 10%\u7a0e\u8fbc\u307f\u4fa1\u683c\u306b\u5909\u63db\n}, $prices);\n\n\/\/ \u6761\u4ef6\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n$in_stock = array_filter($inventory[\"\u96fb\u5b50\u6a5f\u5668\"], function($item) {\n    return $item[\"stock\"] &gt; 0;  \/\/ \u5728\u5eab\u304c\u3042\u308b\u5546\u54c1\u306e\u307f\u62bd\u51fa\n});\n<\/pre>\n\n\n\n<p>\u914d\u5217\u5909\u6570\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3082\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u3001\u30c7\u30fc\u30bf\u306e\u7ba1\u7406\u3068\u64cd\u4f5c\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306bWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7d50\u679c\u3001API\u5fdc\u7b54\u306a\u3069\u3092\u6271\u3046\u969b\u306b\u914d\u5217\u306e\u77e5\u8b58\u304c\u5fc5\u9808\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-22\">\u30a8\u30e9\u30fc\u3092\u9632\u3050\uff01PHP\u5909\u6570\u306e7\u3064\u306e\u5b9f\u8df5\u4f8b<\/h2>\n\n\n\n<p>PHP\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u5909\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u306f\u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u554f\u984c\u306e\u4e00\u3064\u3067\u3059\u3002\u9069\u5207\u306a\u77e5\u8b58\u3068\u5b9f\u8df5\u4f8b\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u304e\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u5f79\u7acb\u30647\u3064\u306e\u5b9f\u8df5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u5b9f\u8df5\u4f8b1\uff1a\u672a\u5b9a\u7fa9\u5909\u6570\u306b\u3088\u308b\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u672a\u5b9a\u7fa9\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001PHP\u306f\u300cUndefined variable\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3055\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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 calculateTotal($prices) {\n    foreach ($prices as $price) {\n        $total += $price;  \/\/ $total\u304c\u672a\u5b9a\u7fa9\u306e\u307e\u307e\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\n    }\n    return $total;\n}\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function calculateTotal($prices) {\n    $total = 0;  \/\/ \u4f7f\u7528\u524d\u306b\u521d\u671f\u5316\u3059\u308b\n    foreach ($prices as $price) {\n        $total += $price;\n    }\n    return $total;\n}\n\n\/\/ \u5225\u306e\u65b9\u6cd5: isset()\u3092\u4f7f\u7528\u3057\u305f\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\nfunction getUsername() {\n    if (isset($_GET['username'])) {\n        return $_GET['username'];\n    }\n    return '\u30b2\u30b9\u30c8';\n}\n\n\/\/ PHP 7\u4ee5\u964d: NULL\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n$username = $_GET['username'] ?? '\u30b2\u30b9\u30c8';\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u5b9f\u8df5\u4f8b2\uff1a\u578b\u306e\u4e0d\u4e00\u81f4\u306b\u3088\u308b\u30d0\u30b0\u3092\u9632\u3050\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>PHP\u5909\u6570\u306e\u578b\u306f\u67d4\u8edf\u306b\u5909\u63db\u3055\u308c\u308b\u305f\u3081\u3001\u610f\u56f3\u3057\u306a\u3044\u7d50\u679c\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e6\u30fc\u30b6\u30fcID\u306e\u6bd4\u8f03\uff08\"42\" == 42 \u306f true\u306b\u306a\u308b\uff09\nif ($_GET['user_id'] == 42) {\n    \/\/ \u6a29\u9650\u4ed8\u4e0e\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u554f\u984c\uff09\n}\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/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=\"\">\/\/ \u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50(===)\u3092\u4f7f\u7528\nif ($_GET['user_id'] === 42) {\n    \/\/ \u578b\u3082\u4e00\u81f4\u3059\u308b\u5834\u5408\u306e\u307f\u771f\n}\n\n\/\/ PHP 7\u4ee5\u964d: \u578b\u5ba3\u8a00\u3092\u4f7f\u7528\nfunction processUserId(int $userId): bool {\n    \/\/ $userId\u306f\u5fc5\u305a\u6574\u6570\u578b\n    return $userId &gt; 0;\n}\n\n\/\/ \u660e\u793a\u7684\u306a\u578b\u5909\u63db\n$userId = (int)$_GET['user_id'];\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u5b9f\u8df5\u4f8b3\uff1a\u914d\u5217\u64cd\u4f5c\u6642\u306e\u4e00\u822c\u7684\u306a\u30df\u30b9\u3068\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306b\u304a\u3044\u3066\u306f\u3001\u7279\u306b\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3084\u53c2\u7167\u6e21\u3057\u306b\u95a2\u3059\u308b\u30df\u30b9\u304c\u591a\u304f\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\n$userData = ['name' =&gt; '\u5c71\u7530'];\necho $userData['email'];  \/\/ Undefined array key \"email\"\n\n\/\/ foreach\u3067\u306e\u53c2\u7167\u6e21\u3057\u306e\u554f\u984c\nforeach ($items as &amp;$item) {\n    $item['price'] *= 1.1;  \/\/ \u7a0e\u8fbc\u4fa1\u683c\u306b\u5909\u66f4\n}\n\/\/ $item\u304c\u53c2\u7167\u306e\u307e\u307e\u6b8b\u3063\u3066\u3044\u308b\n$item = 'new item';  \/\/ \u6700\u5f8c\u306e\u914d\u5217\u8981\u7d20\u304c\u4e0a\u66f8\u304d\u3055\u308c\u308b\uff01\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/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=\"\">\/\/ array_key_exists()\u307e\u305f\u306fisset()\u3067\u78ba\u8a8d\nif (isset($userData['email'])) {\n    echo $userData['email'];\n} else {\n    echo '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306a\u3057';\n}\n\n\/\/ foreach\u3067\u53c2\u7167\u3092\u4f7f\u7528\u3057\u305f\u5f8c\u306f\u89e3\u9664\u3059\u308b\nforeach ($items as &amp;$item) {\n    $item['price'] *= 1.1;\n}\nunset($item);  \/\/ \u53c2\u7167\u3092\u89e3\u9664\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u5b9f\u8df5\u4f8b4\uff1a\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u95a2\u9023\u3059\u308b\u554f\u984c\u306e\u89e3\u6c7a\u6cd5<\/h3>\n\n\n\n<p>\u30b9\u30b3\u30fc\u30d7\u306e\u7406\u89e3\u4e0d\u8db3\u306f\u4e88\u671f\u305b\u306c\u30d0\u30b0\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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=\"\">$count = 0;\n\nfunction increment() {\n    $count++;  \/\/ \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u3057\u3066\u6271\u308f\u308c\u308b\n    echo $count;  \/\/ \u5e38\u306b1\u304c\u8868\u793a\u3055\u308c\u308b\n}\n\nincrement();\nincrement();\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/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=\"\">\/\/ \u65b9\u6cd51: global\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\nfunction increment() {\n    global $count;  \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n    $count++;\n    echo $count;  \/\/ 1, 2, 3...\u3068\u5897\u52a0\n}\n\n\/\/ \u65b9\u6cd52: \u5f15\u6570\u3068\u623b\u308a\u5024\u3092\u4f7f\u7528\uff08\u63a8\u5968\uff09\nfunction increment($count) {\n    return $count + 1;\n}\n$count = increment($count);  \/\/ \u660e\u793a\u7684\u306a\u66f4\u65b0\n\n\/\/ \u65b9\u6cd53: static\u5909\u6570\u3092\u4f7f\u7528\nfunction counter() {\n    static $count = 0;  \/\/ \u95a2\u6570\u547c\u3073\u51fa\u3057\u9593\u3067\u5024\u3092\u4fdd\u6301\n    return ++$count;\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u5b9f\u8df5\u4f8b5\uff1a\u53c2\u7167\u6e21\u3057\u3068\u5024\u6e21\u3057\u3092\u6b63\u3057\u304f\u4f7f\u3044\u5206\u3051\u308b<\/h3>\n\n\n\n<p>\u53c2\u7167\u6e21\u3057\u306f\u5f37\u529b\u3067\u3059\u304c\u3001\u4f7f\u3044\u65b9\u3092\u9593\u9055\u3048\u308b\u3068\u4e88\u671f\u305b\u306c\u30d0\u30b0\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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 processArray(&amp;$data) {\n    \/\/ \u53c2\u7167\u6e21\u3057\u3067\u914d\u5217\u3092\u5909\u66f4\n    $data[] = 'new item';\n}\n\n$originalData = ['item1', 'item2'];\nprocessArray($originalData);  \/\/ \u5143\u306e\u914d\u5217\u304c\u5909\u66f4\u3055\u308c\u308b\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u610f\u56f3\u7684\u306b\u5909\u66f4\u3059\u308b\u5834\u5408\u306f\u3001\u305d\u308c\u3092\u660e\u793a\nfunction addItem(&amp;$data, $item) {\n    $data[] = $item;\n    \/\/ \u8fd4\u308a\u5024\u306a\u3057 - \u5f15\u6570\u306e\u53c2\u7167\u6e21\u3057\u3067\u5909\u66f4\u3059\u308b\u3053\u3068\u3092\u660e\u793a\n}\n\n\/\/ \u5909\u66f4\u3057\u305f\u304f\u306a\u3044\u5834\u5408\u306f\u5024\u6e21\u3057\u3092\u4f7f\u7528\nfunction processArraySafely($data) {\n    $result = $data;\n    $result[] = 'new item';\n    return $result;  \/\/ \u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3059\n}\n$newData = processArraySafely($originalData);  \/\/ \u5143\u30c7\u30fc\u30bf\u306f\u5909\u66f4\u3055\u308c\u306a\u3044\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u5b9f\u8df5\u4f8b6\uff1a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u5909\u6570\u306e\u53d6\u308a\u6271\u3044<\/h3>\n\n\n\n<p>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306a\u3069\u306e\u5916\u90e8\u30c7\u30fc\u30bf\u3092\u5909\u6570\u306b\u683c\u7d0d\u3059\u308b\u969b\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u5341\u5206\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ SQL\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306e\u8106\u5f31\u6027\n$username = $_POST['username'];\n$query = \"SELECT * FROM users WHERE username = '$username'\";\n\/\/ \u60aa\u610f\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c \"' OR '1'='1\" \u3092\u5165\u529b\u3059\u308b\u3068\u5168\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u304c\u6f0f\u6d29\n\n\/\/ XSS\u8106\u5f31\u6027\necho \"\u3053\u3093\u306b\u3061\u306f\u3001\" . $_GET['name'] . \"\u3055\u3093\";\n\/\/ &lt;script&gt;alert('\u653b\u6483')&lt;\/script&gt; \u304c\u5b9f\u884c\u3055\u308c\u308b\u53ef\u80fd\u6027\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PDO\u306e\u30d7\u30ea\u30da\u30a2\u30c9\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\n$stmt = $pdo-&gt;prepare(\"SELECT * FROM users WHERE username = :username\");\n$stmt-&gt;execute(['username' =&gt; $_POST['username']]);\n\n\/\/ HTML\u30a8\u30b9\u30b1\u30fc\u30d7\necho \"\u3053\u3093\u306b\u3061\u306f\u3001\" . htmlspecialchars($_GET['name'], ENT_QUOTES, 'UTF-8') . \"\u3055\u3093\";\n\n\/\/ \u30d5\u30a3\u30eb\u30bf\u95a2\u6570\u306e\u6d3b\u7528\n$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);\nif ($email === false) {\n    \/\/ \u7121\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u5b9f\u8df5\u4f8b7\uff1a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5909\u6570\u306e\u7ba1\u7406\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u3001\u5909\u6570\u306e\u7ba1\u7406\u65b9\u6cd5\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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=\"\">\/\/ \u5927\u304d\u306a\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u30b3\u30d4\u30fc\n$largeArray = range(1, 10000);\nfunction processLargeArray($array) {\n    \/\/ \u914d\u5217\u5168\u4f53\u304c\u30b3\u30d4\u30fc\u3055\u308c\u308b\n    foreach ($array as $item) {\n        \/\/ \u51e6\u7406\n    }\n}\n<\/pre>\n\n\n\n<p><strong>\u6539\u5584\u7b56<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5927\u304d\u306a\u30c7\u30fc\u30bf\u306f\u53c2\u7167\u6e21\u3057\u3092\u5229\u7528\nfunction processLargeArray(&amp;$array) {\n    \/\/ \u30b3\u30d4\u30fc\u306a\u3057\u3067\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\n    foreach ($array as $item) {\n        \/\/ \u51e6\u7406\n    }\n}\n\n\/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u5927\u91cf\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\nfunction getDataIterator() {\n    $data = range(1, 10000);\n    foreach ($data as $item) {\n        yield $item;  \/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u3044\n    }\n}\n\nforeach (getDataIterator() as $item) {\n    \/\/ \u5c11\u306a\u3044\u30e1\u30e2\u30ea\u3067\u5927\u91cf\u30c7\u30fc\u30bf\u3092\u51e6\u7406\n}\n\n\/\/ \u4e0d\u8981\u306a\u5909\u6570\u306funset()\u3067\u89e3\u653e\nunset($largeArray);  \/\/ \u30e1\u30e2\u30ea\u3092\u89e3\u653e\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u4f8b\u3092\u65e5\u3005\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u5909\u6570\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u3092\u52b9\u679c\u7684\u306b\u9632\u304e\u3001\u3088\u308a\u5b89\u5b9a\u3057\u305fPHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3084\u30c1\u30fc\u30e0\u958b\u767a\u306b\u304a\u3044\u3066\u306f\u3001\u3053\u3046\u3057\u305f\u57fa\u672c\u7684\u306a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u304c\u975e\u5e38\u306b\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-30\">\u30d7\u30ed\u306ePHP\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u5b9f\u8df5\u3059\u308b\u5909\u6570\u547d\u540d\u898f\u5247<\/h2>\n\n\n\n<p>\u826f\u3044\u5909\u6570\u540d\u306f\u300c\u81ea\u5df1\u6587\u66f8\u5316\u30b3\u30fc\u30c9\u300d\u306e\u9375\u3067\u3059\u3002\u9069\u5207\u306a\u5909\u6570\u547d\u540d\u898f\u5247\u3092\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u3001\u30d0\u30b0\u306e\u767a\u898b\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u30c1\u30fc\u30e0\u5168\u4f53\u306e\u958b\u767a\u52b9\u7387\u304c\u5927\u5e45\u306b\u6539\u5584\u3057\u307e\u3059\u3002\u30d7\u30ed\u306ePHP\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u547d\u540d\u898f\u5247\u3092\u610f\u8b58\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u8aad\u307f\u3084\u3059\u304f\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u5909\u6570\u540d\u306e\u4ed8\u3051\u65b9<\/h3>\n\n\n\n<p>\u5909\u6570\u540d\u306f\u300c\u4f55\u306e\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3057\u3066\u3044\u308b\u304b\u300d\u304c\u4e00\u76ee\u3067\u308f\u304b\u308b\u3082\u306e\u304c\u7406\u60f3\u7684\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\n$a = 5;                      \/\/ \u610f\u5473\u4e0d\u660e\n$temp = getUserData();       \/\/ \u4f55\u306e\u4e00\u6642\u5909\u6570\uff1f\n$str = \"Hello\";              \/\/ \u5185\u5bb9\u304c\u4e0d\u660e\u78ba\n$arr = [1, 2, 3];            \/\/ \u4f55\u306e\u914d\u5217\uff1f\n\n\/\/ \u826f\u3044\u4f8b\n$age = 5;                    \/\/ \u5e74\u9f62\u3092\u8868\u3059\u5909\u6570\n$userData = getUserData();   \/\/ \u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\n$greeting = \"Hello\";         \/\/ \u6328\u62f6\u6587\n$scores = [1, 2, 3];         \/\/ \u30b9\u30b3\u30a2\u306e\u30ea\u30b9\u30c8\n<\/pre>\n\n\n\n<p><strong>\u57fa\u672c\u539f\u5247<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5177\u4f53\u7684\u306a\u540d\u524d<\/strong>\uff1a\u5909\u6570\u306e\u76ee\u7684\u3084\u5185\u5bb9\u3092\u6b63\u78ba\u306b\u8868\u3059\u540d\u524d\u3092\u9078\u3076<\/li>\n\n\n\n<li><strong>\u5341\u5206\u306a\u9577\u3055<\/strong>\uff1a\u610f\u5473\u304c\u901a\u3058\u308b\u7bc4\u56f2\u3067\u3001\u77ed\u3059\u304e\u305a\u9577\u3059\u304e\u306a\u3044\u540d\u524d\u3092\u4f7f\u3046<\/li>\n\n\n\n<li><strong>\u7701\u7565\u5f62\u3092\u907f\u3051\u308b<\/strong>\uff1a\u660e\u78ba\u3055\u3092\u72a0\u7272\u306b\u3059\u308b\u7701\u7565\u5f62\u3084\u7565\u8a9e\u306f\u4f7f\u308f\u306a\u3044<\/li>\n\n\n\n<li><strong>\u4e00\u8cab\u6027\u3092\u4fdd\u3064<\/strong>\uff1a\u540c\u3058\u6982\u5ff5\u306b\u306f\u540c\u3058\u547d\u540d\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u30c1\u30fc\u30e0\u3067\u306e\u958b\u767a\u3092\u5186\u6ed1\u306b\u3059\u308b\u547d\u540d\u898f\u7d04<\/h3>\n\n\n\n<p>\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u5168\u54e1\u304c\u5b88\u308b\u3079\u304d\u547d\u540d\u898f\u7d04\u3092\u5b9a\u3081\u308b\u3053\u3068\u304c\u91cd\u8981\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=\"\">\/\/ PHP\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u547d\u540d\u898f\u5247\n\n\/\/ 1. camelCase: \u5909\u6570\u540d\u3001\u30e1\u30bd\u30c3\u30c9\u540d\u306b\u4e00\u822c\u7684\uff08Laravel, Symfony\u306a\u3069\uff09\n$userName = \"John\";\nfunction getUserProfile() { \/* ... *\/ }\n\n\/\/ 2. snake_case: \u5909\u6570\u540d\u3001\u95a2\u6570\u540d\u306b\u4f7f\u7528\uff08WordPress, PHP\u306e\u53e4\u3044\u6163\u7fd2\uff09\n$user_name = \"John\";\nfunction get_user_profile() { \/* ... *\/ }\n\n\/\/ 3. PascalCase: \u30af\u30e9\u30b9\u540d\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u306b\u4f7f\u7528\nclass UserProfile { \/* ... *\/ }\ninterface PaymentGateway { \/* ... *\/ }\n\n\/\/ 4. ALL_CAPS: \u5b9a\u6570\u306b\u4f7f\u7528\nconst MAX_ATTEMPTS = 5;\ndefine('API_KEY', 'xyz123');\n<\/pre>\n\n\n\n<p><strong>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u56fa\u6709\u306e\u898f\u7d04<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laravel\u3084Symfony\u306a\u3069\u306e\u30e2\u30c0\u30f3\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306bcamelCase\u3001\u30af\u30e9\u30b9\u306bPascalCase\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>WordPress\u306a\u3069\u306e\u6b74\u53f2\u306e\u3042\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306fsnake_case\u304c\u4e00\u822c\u7684<\/li>\n\n\n\n<li>PHP-FIG\u306ePSR-1\u3001PSR-12\u306a\u3069\u306e\u696d\u754c\u6a19\u6e96\u306b\u6e96\u62e0\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3066\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u30c1\u30fc\u30e0\u5185\u3067\u547d\u540d\u898f\u7d04\u3092\u6587\u66f8\u5316\u3057\u3001\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u4e00\u8cab\u3057\u3066\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">\u7279\u6b8a\u306a\u7528\u9014\u306b\u9069\u3057\u305f\u5909\u6570\u540d\u306e\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u7279\u5b9a\u306e\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u3084\u7528\u9014\u306b\u306f\u3001\u6a19\u6e96\u7684\u306a\u547d\u540d\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>1. \u30d6\u30fc\u30eb\u578b\u5909\u6570<\/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=\"\">\/\/ is_, has_, can_, should_ \u306a\u3069\u306e\u63a5\u982d\u8f9e\u3092\u4f7f\u7528\n$isActive = true;\n$hasPermission = false;\n$canEdit = checkPermission('edit');\n$shouldUpdate = $lastUpdated &lt; $timestamp;\n<\/pre>\n\n\n\n<p><strong>2. \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff08\u914d\u5217\uff09\u5909\u6570<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u5f62\u306e\u540d\u8a5e\u3092\u4f7f\u7528\n$users = ['Alice', 'Bob', 'Charlie'];\n$activeProducts = $products-&gt;filter(fn($p) =&gt; $p-&gt;isActive);\n$pageIds = [1, 2, 3, 4, 5];\n<\/pre>\n\n\n\n<p><strong>3. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5909\u6570<\/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=\"\">\/\/ \u5358\u6570\u5f62\u306e\u540d\u8a5e\u3092\u4f7f\u7528\n$user = new User();\n$product = Product::find($id);\n$response = $client-&gt;get('\/api\/data');\n<\/pre>\n\n\n\n<p><strong>4. \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30d7\u30ed\u30d1\u30c6\u30a3\uff08\u30af\u30e9\u30b9\u5185\uff09<\/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=\"\">class User {\n    \/\/ PHP 8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u30d7\u30ed\u30e2\u30fc\u30b7\u30e7\u30f3\n    public function __construct(\n        private string $_name,     \/\/ \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30d7\u30ed\u30d1\u30c6\u30a3\u306b_\u63a5\u982d\u8f9e\n        private int $_age,\n        public string $email       \/\/ \u30d1\u30d6\u30ea\u30c3\u30af\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u63a5\u982d\u8f9e\u306a\u3057\n    ) {}\n}\n<\/pre>\n\n\n\n<p><strong>5. \u30a4\u30c6\u30ec\u30fc\u30bf\u5909\u6570<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5358\u7d14\u306a\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u306f$i, $j, $k\u306a\u3069\u306e\u77ed\u3044\u540d\u524d\u3082\u8a31\u5bb9\u3055\u308c\u308b\nfor ($i = 0; $i &lt; count($items); $i++) {\n    \/\/ ...\n}\n\n\/\/ \u610f\u5473\u306e\u3042\u308b\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u306f\u3001\u5185\u5bb9\u3092\u53cd\u6620\u3057\u305f\u540d\u524d\u3092\u4f7f\u7528\nforeach ($users as $user) {\n    \/\/ $user\u306f\u5358\u6570\u5f62\u3001$users\u306f\u8907\u6570\u5f62\n}\n<\/pre>\n\n\n\n<p>\u660e\u78ba\u3067\u4e00\u8cab\u6027\u306e\u3042\u308b\u547d\u540d\u898f\u5247\u306f\u3001\u30b3\u30fc\u30c9\u306e\u300c\u79d8\u5bc6\u306e\u8a00\u8a9e\u300d\u3092\u89e3\u8aad\u3059\u308b\u9375\u3067\u3059\u3002\u7279\u306b\u8907\u6570\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u5354\u529b\u3059\u308b\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u826f\u3044\u547d\u540d\u898f\u5247\u304c\u54c1\u8cea\u3068\u52b9\u7387\u306e\u9055\u3044\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-34\">PHP\u5909\u6570\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n\n\n\n<p>PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u4e2d\u3001\u5909\u6570\u95a2\u9023\u306e\u554f\u984c\u306f\u6700\u3082\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30d0\u30b0\u306e\u6e90\u6cc9\u3067\u3059\u3002\u52b9\u679c\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u624b\u6cd5\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u3092\u7d20\u65e9\u304f\u7279\u5b9a\u3057\u3001\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001PHP\u306e\u5909\u6570\u3092\u30c7\u30d0\u30c3\u30b0\u3059\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<h3 class=\"wp-block-heading\" id=\"i-35\">var_dump()\u3068print_r()\u3092\u4f7f\u3044\u3053\u306a\u3059<\/h3>\n\n\n\n<p>PHP\u306b\u306f\u5909\u6570\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ var_dump(): \u5909\u6570\u306e\u578b\u3068\u5024\u306e\u8a73\u7d30\u60c5\u5831\u3092\u8868\u793a\n$user = ['name' =&gt; '\u7530\u4e2d', 'age' =&gt; 28, 'active' =&gt; true];\nvar_dump($user);\n\/\/ \u51fa\u529b:\n\/\/ array(3) {\n\/\/   [\"name\"]=&gt; string(6) \"\u7530\u4e2d\"\n\/\/   [\"age\"]=&gt; int(28)\n\/\/   [\"active\"]=&gt; bool(true)\n\/\/ }\n\n\/\/ print_r(): \u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u3067\u914d\u5217\/\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8868\u793a\nprint_r($user);\n\/\/ \u51fa\u529b:\n\/\/ Array\n\/\/ (\n\/\/     [name] =&gt; \u7530\u4e2d\n\/\/     [age] =&gt; 28\n\/\/     [active] =&gt; 1\n\/\/ )\n<\/pre>\n\n\n\n<p><strong>\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u51fa\u529b\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6539\u5584<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">echo '&lt;pre&gt;';\nvar_dump($complexArray);\necho '&lt;\/pre&gt;';\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7279\u5b9a\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u30c7\u30d0\u30c3\u30b0<\/strong>\uff1a<\/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=\"\">echo \"\u30eb\u30fc\u30d7\u524d\u306e\u5024: \";\nvar_dump($counter);\n\nforeach ($items as $item) {\n    $counter += $item['value'];\n    echo \"\u9805\u76ee {$item['name']} \u5f8c\u306e\u5024: \";\n    var_dump($counter);\n}\n<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u51fa\u529b\u3092\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u51fa\u529b\u3092\u5909\u6570\u306b\u683c\u7d0d\n$output = print_r($data, true);\nfile_put_contents('debug.log', $output, FILE_APPEND);\n<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>var_export() \u306b\u3088\u308b\u518d\u5229\u7528\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u751f\u6210<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$exportedArray = var_export($complexArray, true);\n\/\/ \u6709\u52b9\u306aPHP\u30b3\u30fc\u30c9\u3068\u3057\u3066\u51fa\u529b\u3055\u308c\u308b\nfile_put_contents('data.php', '&lt;?php $data = ' . $exportedArray . ';');\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-36\">\u5909\u6570\u95a2\u9023\u306e\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u89e3\u8aad\u6cd5<\/h3>\n\n\n\n<p>PHP\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u5177\u4f53\u7684\u3067\u3059\u304c\u3001\u521d\u3081\u3066\u898b\u308b\u3068\u7406\u89e3\u3057\u3065\u3089\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-ec19e9b8-53b7-4943-99f9-ff4b2e418b21\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/th><th>\u610f\u5473<\/th><th>\u4e00\u822c\u7684\u306a\u539f\u56e0<\/th><th>\u5bfe\u7b56<\/th><\/tr><\/thead><tbody><tr><td>Undefined variable<\/td><td>\u5909\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044<\/td><td>\u5909\u6570\u306e\u521d\u671f\u5316\u5fd8\u308c\u3001\u30b9\u30b3\u30fc\u30d7\u5916\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9<\/td><td>\u4f7f\u7528\u524d\u306b\u521d\u671f\u5316\u3001isset()\u3067\u30c1\u30a7\u30c3\u30af<\/td><\/tr><tr><td>Undefined array key<\/td><td>\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/td><td>\u8aa4\u5b57\u3001\u30ad\u30fc\u306e\u4e0d\u4e00\u81f4<\/td><td>array_key_exists()\u3067\u30c1\u30a7\u30c3\u30af<\/td><\/tr><tr><td>Cannot use string offset as an array<\/td><td>\u6587\u5b57\u5217\u3092\u914d\u5217\u3068\u3057\u3066\u4f7f\u7528<\/td><td>\u5909\u6570\u306e\u578b\u306e\u8aa4\u8a8d\u8b58<\/td><td>is_array()\u3067\u30c1\u30a7\u30c3\u30af<\/td><\/tr><tr><td>Trying to access array offset on value of type null<\/td><td>null\u5024\u3092\u914d\u5217\u3068\u3057\u3066\u6271\u3063\u3066\u3044\u308b<\/td><td>API\/DB\u7d50\u679c\u304cnull\u306e\u5834\u5408\u306b\u767a\u751f<\/td><td>null\u5408\u4f53\u6f14\u7b97\u5b50(??)\u3001\u7a7a\u914d\u5217\u306e\u521d\u671f\u5316<\/td><\/tr><tr><td>Object of class X could not be converted to string<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6587\u5b57\u5217\u5316\u5931\u6557<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u76f4\u63a5\u51fa\u529b<\/td><td>__toString()\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3001\u7279\u5b9a\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u51fa\u529b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u89e3\u8aad\u306b\u306f\u3001\u884c\u756a\u53f7\u3001\u6587\u8108\u3001\u5909\u6570\u306e\u5185\u5bb9\u3092\u7dcf\u5408\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">Xdebug\u306a\u3069\u306e\u30c4\u30fc\u30eb\u3067PHP\u5909\u6570\u3092\u52b9\u7387\u7684\u306b\u8ffd\u8de1\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5358\u7d14\u306aprint\u6587\u306b\u3088\u308b\u30c7\u30d0\u30c3\u30b0\u306b\u306f\u9650\u754c\u304c\u3042\u308a\u307e\u3059\u3002Xdebug\u306e\u3088\u3046\u306a\u5c02\u7528\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u3068\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u30c7\u30d0\u30c3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Xdebug\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u57fa\u672c\u8a2d\u5b9a<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">; php.ini\u8a2d\u5b9a\u4f8b\nzend_extension=xdebug.so\nxdebug.mode=debug\nxdebug.start_with_request=yes\nxdebug.client_port=9003\n<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>IDE\u3068\u306e\u9023\u643a<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>PHPStorm\u3001VSCode\u3001Eclipse\u306a\u3069\u306f\u3001Xdebug\u3068\u9023\u643a\u3057\u3066\u30d3\u30b8\u30e5\u30a2\u30eb\u30c7\u30d0\u30c3\u30b0\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u306e\u8a2d\u5b9a\u3001\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\u3001\u5909\u6570\u306e\u76e3\u8996\u304c\u76f4\u611f\u7684\u306b\u884c\u3048\u308b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5909\u6570\u306e\u76e3\u8996\u3068\u8ffd\u8de1<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u5909\u6570\u306e\u5024\u3092\u76e3\u8996<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u69cb\u9020\u3067\u3082\u968e\u5c64\u7684\u306b\u8868\u793a<\/li>\n\n\n\n<li>\u7279\u5b9a\u306e\u5909\u6570\u306e\u5024\u304c\u5909\u308f\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u306b\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u5b9a\u53ef\u80fd<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u3088\u308a\u30ea\u30c3\u30c1\u306avar_dump\u51fa\u529b<\/strong>\uff1a<\/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=\"\">\/\/ Xdebug\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u3068\u3001var_dump()\u306e\u51fa\u529b\u304c\n\/\/ \u3088\u308a\u8a73\u7d30\u3067\u8aad\u307f\u3084\u3059\u3044\u3082\u306e\u306b\u306a\u308a\u307e\u3059\nvar_dump($complexObject);\n<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u30d6\u30e9\u30a6\u30b6\u30a8\u30af\u30b9\u30c6\u30f3\u30b7\u30e7\u30f3<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>Firefox: \u201cXdebug Helper\u201d<\/li>\n\n\n\n<li>Chrome: \u201cXdebug Helper\u201d<\/li>\n\n\n\n<li>\u3053\u308c\u3089\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7279\u5b9a\u306e\u30da\u30fc\u30b8\u3067\u306e\u307f\u30c7\u30d0\u30c3\u30b0\u3092\u6709\u52b9\u5316\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u30d7\u30ed\u306ePHP\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u3001print\u6587\u306b\u3088\u308b\u5358\u7d14\u306a\u30c7\u30d0\u30c3\u30b0\u3060\u3051\u3067\u306a\u304f\u3001\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u89e3\u6c7a\u306e\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u5909\u6570\u306e\u5024\u3084\u578b\u306b\u95a2\u3059\u308b\u554f\u984c\u306f\u3001\u9069\u5207\u306a\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u3053\u3068\u3067\u52b9\u7387\u7684\u306b\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u958b\u767a\u74b0\u5883\u306bXdebug\u3092\u8a2d\u5b9a\u3057\u3001IDE\u3068\u9023\u643a\u3059\u308b\u3053\u3068\u306f\u3001PHP\u958b\u767a\u306e\u751f\u7523\u6027\u3092\u5287\u7684\u306b\u5411\u4e0a\u3055\u305b\u308b\u6700\u3082\u91cd\u8981\u306a\u6295\u8cc7\u306e\u4e00\u3064\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-38\">\u307e\u3068\u3081\uff1aPHP\u5909\u6570\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306e\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n<p>PHP\u306e\u5909\u6570\u306f\u4e00\u898b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u305d\u306e\u5965\u6df1\u3055\u3068\u5fdc\u7528\u306e\u53ef\u80fd\u6027\u306f\u7121\u9650\u5927\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u5909\u6570\u306e\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u5b9f\u969b\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306b\u6d3b\u304b\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044PHP\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u30607\u3064\u306e\u5b9f\u8df5\u4f8b\u306e\u5fa9\u7fd2<\/h3>\n\n\n\n<p>\u79c1\u305f\u3061\u304c\u7279\u306b\u6ce8\u76ee\u3057\u305f7\u3064\u306e\u5b9f\u8df5\u4f8b\u3092\u632f\u308a\u8fd4\u3063\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u672a\u5b9a\u7fa9\u5909\u6570\u30a8\u30e9\u30fc\u306e\u56de\u907f<\/strong> \u2013 \u5909\u6570\u4f7f\u7528\u524d\u306e\u521d\u671f\u5316\u3068\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u306e\u5fb9\u5e95<\/li>\n\n\n\n<li><strong>\u578b\u306e\u4e0d\u4e00\u81f4\u30d0\u30b0\u306e\u9632\u6b62<\/strong> \u2013 \u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\u3068\u660e\u793a\u7684\u306a\u578b\u5909\u63db\u306e\u6d3b\u7528<\/li>\n\n\n\n<li><strong>\u914d\u5217\u64cd\u4f5c\u30df\u30b9\u3078\u306e\u5bfe\u7b56<\/strong> \u2013 \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\u3068\u53c2\u7167\u6e21\u3057\u306e\u9069\u5207\u306a\u7ba1\u7406<\/li>\n\n\n\n<li><strong>\u30b9\u30b3\u30fc\u30d7\u554f\u984c\u306e\u89e3\u6c7a<\/strong> \u2013 \u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\u3092\u9078\u629e<\/li>\n\n\n\n<li><strong>\u53c2\u7167\u6e21\u3057\u3068\u5024\u6e21\u3057\u306e\u4f7f\u3044\u5206\u3051<\/strong> \u2013 \u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u9069\u5207\u306a\u5f15\u6570\u6e21\u3057\u65b9\u306e\u9078\u629e<\/li>\n\n\n\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u5909\u6570\u53d6\u6271\u3044<\/strong> \u2013 \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u9069\u5207\u306a\u30b5\u30cb\u30bf\u30a4\u30ba\u3068\u691c\u8a3c<\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5909\u6570\u7ba1\u7406<\/strong> \u2013 \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406\u65b9\u6cd5<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u4f8b\u306f\u5358\u306a\u308b\u77e5\u8b58\u3067\u306f\u306a\u304f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u3059\u3050\u306b\u6d3b\u7528\u3067\u304d\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">\u3055\u3089\u306a\u308b\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306e\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h3>\n\n\n\n<p>PHP\u5909\u6570\u306e\u4f7f\u3044\u65b9\u3092\u3055\u3089\u306b\u6975\u3081\u308b\u305f\u3081\u306e\u512a\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.php.net\/manual\/ja\/language.variables.php\">PHP\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a><\/strong> \u2013 \u6700\u3082\u4fe1\u983c\u3067\u304d\u308b\u60c5\u5831\u6e90\u3067\u6700\u65b0\u306e\u5909\u6570\u95a2\u9023\u6a5f\u80fd\u3092\u5b66\u3076<\/li>\n\n\n\n<li><strong>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong> \u2013 Laravel, Symfony\u306a\u3069\u306e\u4e3b\u8981\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306e\u5909\u6570\u306e\u6271\u3044\u65b9\u3092\u7814\u7a76\u3059\u308b<\/li>\n\n\n\n<li><strong>\u300eModern PHP\u300f\uff08Josh Lockhart\u8457\uff09<\/strong> \u2013 \u73fe\u4ee3\u7684\u306aPHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u3092\u5b66\u3079\u308b\u540d\u8457<\/li>\n\n\n\n<li><strong>Laracasts, Udemy<\/strong> \u306a\u3069\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9\u3067\u5b9f\u8df5\u7684\u306aPHP\u30b9\u30ad\u30eb\u3092\u78e8\u304f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">\u5909\u6570\u306e\u77e5\u8b58\u3092\u6d3b\u304b\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a2\u30a4\u30c7\u30a2<\/h3>\n\n\n\n<p>\u5b66\u3093\u3060\u77e5\u8b58\u3092\u5b9f\u8df5\u306b\u79fb\u3059\u305f\u3081\u306e\u5c0f\u301c\u4e2d\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a2\u30a4\u30c7\u30a2\u3092\u3044\u304f\u3064\u304b\u6319\u3052\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u500b\u4eba\u7528\u8ca1\u52d9\u7ba1\u7406\u30c4\u30fc\u30eb<\/strong> \u2013 \u914d\u5217\u64cd\u4f5c\u3068\u578b\u5909\u63db\u3092\u5b9f\u8df5\u3067\u304d\u308b<\/li>\n\n\n\n<li><strong>\u7c21\u6613CMS\u30b7\u30b9\u30c6\u30e0<\/strong> \u2013 \u5909\u6570\u30b9\u30b3\u30fc\u30d7\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u5b66\u3079\u308b<\/li>\n\n\n\n<li><strong>API\u9023\u643a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/strong> \u2013 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