{"id":3425,"date":"2025-03-24T08:46:13","date_gmt":"2025-03-23T23:46:13","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=3425"},"modified":"2025-03-24T08:46:43","modified_gmt":"2025-03-23T23:46:43","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91php%e3%81%aeif%e6%96%87%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e8%a1%93-%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=3425","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011PHP\u306eif\u6587\u30de\u30b9\u30bf\u30fc\u8853 &#8211; 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class=\"wp-block-list\">\n<li>PHP\u306eif\u6587\u306e\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3068\u8a55\u4fa1\u30ed\u30b8\u30c3\u30af<\/li>\n\n\n\n<li>\u8907\u6570\u6761\u4ef6\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5\u65b9\u6cd5<\/li>\n\n\n\n<li>\u3088\u304f\u3042\u308b\u30d0\u30b0\u3092\u672a\u7136\u306b\u9632\u3050\u66f8\u304d\u65b9\u306e\u30dd\u30a4\u30f3\u30c8<\/li>\n\n\n\n<li>\u5b9f\u52d9\u3067\u5f79\u7acb\u3064if\u6587\u306e\u5fdc\u7528\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/ul>\n\n\n\n<p>\u300c\u691c\u7d22\u3057\u3066\u90e8\u5206\u7684\u306a\u77e5\u8b58\u306f\u5f97\u305f\u3051\u3069\u3001\u4f53\u7cfb\u7684\u306b\u7406\u89e3\u3057\u305f\u3044\u300d\u300c\u306a\u305c\u30d0\u30b0\u304c\u767a\u751f\u3059\u308b\u306e\u304b\u306e\u6839\u672c\u539f\u56e0\u3092\u77e5\u308a\u305f\u3044\u300d\u300c\u3088\u308a\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u300d\u3068\u3044\u3046\u65b9\u306f\u3001\u305c\u3072\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u304f\u3060\u3055\u3044\u3002PHP\u306eif\u6587\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3066\u3001\u30af\u30ea\u30fc\u30f3\u3067\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">PHP\u306eif\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">if\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u66f8\u304d\u65b9\u306e\u30eb\u30fc\u30eb<\/a>      <\/li>      <li>        <a href=\"#i-2\">PHP\u306b\u304a\u3051\u308b\u771f\u507d\u5024\u306e\u8a55\u4fa1\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u6761\u4ef6\u5f0f\u3067\u4f7f\u3048\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u4e00\u89a7<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">else\u30fbelseif\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u62e1\u5f35<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">else\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u57fa\u672c<\/a>      <\/li>      <li>        <a href=\"#i-6\">elseif\u306b\u3088\u308b\u8907\u6570\u6761\u4ef6\u306e\u9023\u9396\u7684\u306a\u8a55\u4fa1\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">if-elseif-else\u306e\u5b9f\u884c\u30d5\u30ed\u30fc\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">PHP\u306eif\u6587\u306b\u304a\u3051\u308b\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">AND\u6f14\u7b97\u5b50\uff08&amp;&amp;\uff09\u3067\u8907\u6570\u6761\u4ef6\u3092\u3059\u3079\u3066\u6e80\u305f\u3059\u5224\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-10\">OR\u6f14\u7b97\u5b50\uff08||\uff09\u3067\u3044\u305a\u308c\u304b\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5224\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-11\">NOT\u6f14\u7b97\u5b50\uff08!\uff09\u3067\u6761\u4ef6\u3092\u53cd\u8ee2\u3055\u305b\u308b\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\"> 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class=\"first\">        <a href=\"#i-22\">\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-23\">\u6df1\u3044\u30cd\u30b9\u30c8\u3092\u907f\u3051\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-24\">early return\u30d1\u30bf\u30fc\u30f3\u3067\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u3059\u5b9f\u8df5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-25\">\u914d\u5217\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068if\u6587\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-26\">\u914d\u5217\u306e\u8981\u7d20\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3068if\u6587\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>      <li>        <a href=\"#i-27\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u78ba\u8a8d\u3068\u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-28\">\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u52b9\u7387\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-29\">PHP\u306eswitch\u6587\u3068\u306e\u4f7f\u3044\u5206\u3051<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-30\">if\u6587\u3068switch\u6587\u306e\u7279\u5fb4\u3068\u9055\u3044<\/a>      <\/li>      <li>        <a href=\"#i-31\">\u3069\u306e\u3088\u3046\u306a\u5834\u5408\u306bswitch\u6587\u3092\u9078\u3076\u3079\u304d\u304b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-32\">switch\u6587\u304b\u3089if\u6587\u3078\u306e\u66f8\u304d\u63db\u3048\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-33\">\u6761\u4ef6\u5206\u5c90\u306b\u95a2\u3059\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-34\">=\u3068==\u306e\u6df7\u540c\u306b\u3088\u308b\u30d0\u30b0\u3068\u9632\u6b62\u7b56<\/a>      <\/li>      <li>        <a href=\"#i-35\">\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u9806\u5e8f\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-36\">\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u3092\u610f\u8b58\u3057\u305f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-37\">\u6761\u4ef6\u5206\u5c90\u306b\u304a\u3051\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-38\">\u5b9f\u8df5\u7684\u306aif\u6587\u6d3b\u7528\u4f8b\u3068\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-39\">\u30d5\u30a9\u30fc\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067\u306eif\u6587\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-40\">\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30c1\u30a7\u30c3\u30af\u3068\u8a8d\u8a3c\u51e6\u7406\u3078\u306e\u5fdc\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-41\">\u6761\u4ef6\u4ed8\u304dHTML\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">PHP\u306eif\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/h2>\n\n\n\n<p>PHP\u306eif\u6587\u306f\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u6700\u3082\u57fa\u672c\u7684\u306a\u69cb\u6587\u3067\u3059\u3002\u307e\u305a\u306f\u57fa\u672c\u304b\u3089\u9806\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">if\u6587\u306e\u57fa\u672c\u69cb\u6587\u3068\u66f8\u304d\u65b9\u306e\u30eb\u30fc\u30eb<\/h3>\n\n\n\n<p>if\u6587\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if (\u6761\u4ef6\u5f0f) {\n    \/\/ \u6761\u4ef6\u5f0f\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u4f8b\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$age = 20;\n\nif ($age &gt;= 18) {\n    echo \"\u6210\u4eba\u3067\u3059\u3002\"; \/\/ $age\u304c18\u4ee5\u4e0a\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\n}\n<\/pre>\n\n\n\n<p>if\u6587\u3092\u4f7f\u3046\u969b\u306e\u91cd\u8981\u306a\u30eb\u30fc\u30eb\u3068\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u5f0f\u306f\u5fc5\u305a\u62ec\u5f27 ( ) \u3067\u56f2\u3080<\/strong> <code>\/\/ \u6b63\u3057\u3044\u66f8\u304d\u65b9 if ($score &gt; 80) { ... } \/\/ \u8aa4\u3063\u305f\u66f8\u304d\u65b9\uff08\u69cb\u6587\u30a8\u30e9\u30fc\u306b\u306a\u308b\uff09 if $score &gt; 80 { ... }<\/code><\/li>\n\n\n\n<li><strong>\u5b9f\u884c\u3059\u308b\u51e6\u7406\u304c1\u884c\u3060\u3051\u306e\u5834\u5408\u306f\u6ce2\u62ec\u5f27 { } \u3092\u7701\u7565\u3067\u304d\u308b\u304c\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306b\u3064\u3051\u308b\u3053\u3068\u3092\u63a8\u5968<\/strong> <code>\/\/ \u7701\u7565\u5f62\uff08\u63a8\u5968\u3055\u308c\u306a\u3044\uff09 if ($loggedIn) echo \"\u3088\u3046\u3053\u305d!\"; \/\/ \u63a8\u5968\u3055\u308c\u308b\u66f8\u304d\u65b9 if ($loggedIn) { echo \"\u3088\u3046\u3053\u305d!\"; }<\/code><\/li>\n\n\n\n<li><strong>\u30a4\u30f3\u30c7\u30f3\u30c8\u3092\u9069\u5207\u306b\u4f7f\u7528\u3057\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b<\/strong> <code>if ($condition) { \/\/ \u3053\u3053\u306f4\u30b9\u30da\u30fc\u30b9\u307e\u305f\u306f\u30bf\u30d6\u3067\u30a4\u30f3\u30c7\u30f3\u30c8\u3059\u308b doSomething(); }<\/code><\/li>\n\n\n\n<li><strong>\u6761\u4ef6\u5f0f\u306e\u7d50\u679c\u306f\u6700\u7d42\u7684\u306btrue\u304bfalse\u306b\u8a55\u4fa1\u3055\u308c\u308b<\/strong><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">PHP\u306b\u304a\u3051\u308b\u771f\u507d\u5024\u306e\u8a55\u4fa1\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP\u306f\u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\u3067\u3042\u308b\u305f\u3081\u3001\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u306b\u306f\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002PHP\u3067\u306f\u69d8\u3005\u306a\u5024\u304c\u81ea\u52d5\u7684\u306b\u771f\u507d\u5024\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u771f(true)\u3068\u8a55\u4fa1\u3055\u308c\u308b\u5024<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ad6\u7406\u5024 <code>true<\/code><\/li>\n\n\n\n<li>\u975e0\u306e\u6574\u6570\u3068\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\uff08<code>1<\/code>, <code>-1<\/code>, <code>0.5<\/code> \u306a\u3069\uff09<\/li>\n\n\n\n<li>\u7a7a\u3067\u306a\u3044\u6587\u5b57\u5217\uff08<code>\"hello\"<\/code> \u306a\u3069\uff09<\/li>\n\n\n\n<li>\u7a7a\u3067\u306a\u3044\u914d\u5217<\/li>\n\n\n\n<li>\u4e2d\u8eab\u306e\u3042\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/li>\n<\/ul>\n\n\n\n<p><strong>\u507d(false)\u3068\u8a55\u4fa1\u3055\u308c\u308b\u5024<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ad6\u7406\u5024 <code>false<\/code><\/li>\n\n\n\n<li>\u6574\u6570 <code>0<\/code> \u304a\u3088\u3073\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570 <code>0.0<\/code><\/li>\n\n\n\n<li>\u7a7a\u6587\u5b57\u5217 <code>\"\"<\/code><\/li>\n\n\n\n<li>\u6587\u5b57\u5217 <code>\"0\"<\/code><\/li>\n\n\n\n<li>\u7a7a\u306e\u914d\u5217 <code>array()<\/code><\/li>\n\n\n\n<li><code>null<\/code><\/li>\n\n\n\n<li>\u672a\u5b9a\u7fa9\u306e\u5909\u6570<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3092\u78ba\u8a8d\u3059\u308b\u30b3\u30fc\u30c9\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u771f\u3068\u8a55\u4fa1\u3055\u308c\u308b\u4f8b\nif (true)        { echo \"true\u306f\u771f&lt;br&gt;\"; }\nif (1)           { echo \"1\u306f\u771f&lt;br&gt;\"; }\nif (-1)          { echo \"-1\u306f\u771f&lt;br&gt;\"; }\nif (\"hello\")     { echo \"\u7a7a\u3067\u306a\u3044\u6587\u5b57\u5217\u306f\u771f&lt;br&gt;\"; }\nif ([1, 2, 3])   { echo \"\u7a7a\u3067\u306a\u3044\u914d\u5217\u306f\u771f&lt;br&gt;\"; }\n\n\/\/ \u507d\u3068\u8a55\u4fa1\u3055\u308c\u308b\u4f8b\nif (false)       { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 *\/ }\nif (0)           { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 *\/ }\nif (\"0\")         { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 - \u6ce8\u610f\uff01 *\/ }\nif (\"\")          { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 *\/ }\nif ([])          { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 *\/ }\nif (null)        { \/* \u5b9f\u884c\u3055\u308c\u306a\u3044 *\/ }\n<\/pre>\n\n\n\n<p>\u7279\u306b\u6ce8\u610f\u3059\u3079\u304d\u306f\u3001\u6587\u5b57\u5217 <code>\"0\"<\/code> \u304c\u507d\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u308b\u70b9\u3067\u3059\u3002\u3053\u308c\u306fPHP\u306e\u7279\u5fb4\u7684\u306a\u52d5\u4f5c\u3067\u3001\u601d\u308f\u306c\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u6761\u4ef6\u5f0f\u3067\u4f7f\u3048\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u4e00\u89a7<\/h3>\n\n\n\n<p>\u6761\u4ef6\u5f0f\u3067\u306f\u3001\u69d8\u3005\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u5024\u3092\u6bd4\u8f03\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n<div id=\"id-7c6f2169-82b8-467e-adbf-d1fd052ff80c\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6f14\u7b97\u5b50<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><th>\u7d50\u679c<\/th><\/tr><\/thead><tbody><tr><td><code>==<\/code><\/td><td>\u7b49\u3057\u3044\uff08\u5024\u304c\u540c\u3058\uff09<\/td><td><code>$a == $b<\/code><\/td><td>\u5024\u304c\u7b49\u3057\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>===<\/code><\/td><td>\u53b3\u5bc6\u306b\u7b49\u3057\u3044\uff08\u5024\u3068\u578b\u304c\u540c\u3058\uff09<\/td><td><code>$a === $b<\/code><\/td><td>\u5024\u3068\u578b\u304c\u4e21\u65b9\u7b49\u3057\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>!=<\/code><\/td><td>\u7b49\u3057\u304f\u306a\u3044<\/td><td><code>$a != $b<\/code><\/td><td>\u5024\u304c\u7b49\u3057\u304f\u306a\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>!==<\/code><\/td><td>\u53b3\u5bc6\u306b\u7b49\u3057\u304f\u306a\u3044<\/td><td><code>$a !== $b<\/code><\/td><td>\u5024\u307e\u305f\u306f\u578b\u304c\u7b49\u3057\u304f\u306a\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>&lt;<\/code><\/td><td>\u3088\u308a\u5c0f\u3055\u3044<\/td><td><code>$a &lt; $b<\/code><\/td><td>$a\u304c$b\u3088\u308a\u5c0f\u3055\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>&gt;<\/code><\/td><td>\u3088\u308a\u5927\u304d\u3044<\/td><td><code>$a &gt; $b<\/code><\/td><td>$a\u304c$b\u3088\u308a\u5927\u304d\u3051\u308c\u3070true<\/td><\/tr><tr><td><code>&lt;=<\/code><\/td><td>\u4ee5\u4e0b<\/td><td><code>$a &lt;= $b<\/code><\/td><td>$a\u304c$b\u4ee5\u4e0b\u306a\u3089true<\/td><\/tr><tr><td><code>&gt;=<\/code><\/td><td>\u4ee5\u4e0a<\/td><td><code>$a &gt;= $b<\/code><\/td><td>$a\u304c$b\u4ee5\u4e0a\u306a\u3089true<\/td><\/tr><tr><td><code>&lt;=&gt;<\/code><\/td><td>\u5b87\u5b99\u8239\u6f14\u7b97\u5b50\uff08PHP7\u4ee5\u964d\uff09<\/td><td><code>$a &lt;=&gt; $b<\/code><\/td><td>$a\u304c$b\u3088\u308a\u5c0f\u3055\u3051\u308c\u3070-1\u3001\u7b49\u3057\u3051\u308c\u30700\u3001\u5927\u304d\u3051\u308c\u30701<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u7279\u306b\u91cd\u8981\u306a\u306e\u306f <code>==<\/code>\uff08\u7b49\u4fa1\u6f14\u7b97\u5b50\uff09\u3068 <code>===<\/code>\uff08\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff09\u306e\u9055\u3044\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$a = 5;    \/\/ \u6574\u6570\n$b = \"5\";  \/\/ \u6587\u5b57\u5217\n\n\/\/ \u7b49\u4fa1\u6f14\u7b97\u5b50\u306f\u578b\u5909\u63db\u3092\u884c\u3063\u3066\u304b\u3089\u6bd4\u8f03\nif ($a == $b) {\n    echo \"== \u3067\u306f\u7b49\u3057\u3044\u3068\u8a55\u4fa1\u3055\u308c\u308b&lt;br&gt;\"; \/\/ \u3053\u306e\u884c\u306f\u5b9f\u884c\u3055\u308c\u308b\n}\n\n\/\/ \u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\u306f\u578b\u3082\u542b\u3081\u3066\u6bd4\u8f03\nif ($a === $b) {\n    echo \"=== \u3067\u306f\u7b49\u3057\u3044\u3068\u8a55\u4fa1\u3055\u308c\u308b&lt;br&gt;\"; \/\/ \u3053\u306e\u884c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\n}\n<\/pre>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306f\u6df7\u4e71\u3084\u4e88\u671f\u305b\u306c\u30d0\u30b0\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u3067\u304d\u308b\u3060\u3051 <code>===<\/code>\uff08\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u3084\u5916\u90e8\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u578b\u306e\u53b3\u5bc6\u306a\u6bd4\u8f03\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5b87\u5b99\u8239\u6f14\u7b97\u5b50 <code>&lt;=&gt;<\/code> \u306f PHP 7 \u3067\u5c0e\u5165\u3055\u308c\u305f\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u3001\u7279\u306b\u30bd\u30fc\u30c8\u95a2\u6570\u306a\u3069\u3067\u4fbf\u5229\u306b\u4f7f\u3048\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5b87\u5b99\u8239\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u4f8b\n$a = 5;\n$b = 10;\n$result = $a &lt;=&gt; $b;\n\necho \"$a &lt;=&gt; $b = \";\nif ($result &lt; 0) {\n    echo \"\u5de6\u8fba\u304c\u5c0f\u3055\u3044 (-1)\";\n} elseif ($result &gt; 0) {\n    echo \"\u5de6\u8fba\u304c\u5927\u304d\u3044 (1)\";\n} else {\n    echo \"\u4e21\u8fba\u306f\u7b49\u3057\u3044 (0)\";\n}\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7cbe\u5ea6\u306e\u9ad8\u3044\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">else\u30fbelseif\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u62e1\u5f35<\/h2>\n\n\n\n<p>\u5358\u7d14\u306aif\u6587\u3060\u3051\u3067\u306f\u5bfe\u5fdc\u3067\u304d\u306a\u3044\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001PHP\u3067\u306f\u300celse\u300d\u3068\u300celseif\u300d\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u5206\u5c90\u3092\u62e1\u5f35\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">else\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u57fa\u672c<\/h3>\n\n\n\n<p>else\u306f\u3001if\u6587\u306e\u6761\u4ef6\u304c\u507d(false)\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u4ee3\u66ff\u51e6\u7406\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u57fa\u672c\u69cb\u6587\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=\"\">if (\u6761\u4ef6\u5f0f) {\n    \/\/ \u6761\u4ef6\u5f0f\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n} else {\n    \/\/ \u6761\u4ef6\u5f0f\u304cfalse\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u5b9f\u969b\u306e\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$age = 15;\n\nif ($age &gt;= 18) {\n    echo \"\u6210\u4eba\u3067\u3059\u3002\"; \/\/ $age\u304c18\u4ee5\u4e0a\u306e\u5834\u5408\n} else {\n    echo \"\u672a\u6210\u5e74\u3067\u3059\u3002\"; \/\/ $age\u304c18\u672a\u6e80\u306e\u5834\u5408\n}\n\/\/ \u51fa\u529b\u7d50\u679c: \"\u672a\u6210\u5e74\u3067\u3059\u3002\"\n<\/pre>\n\n\n\n<p>else\u6587\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u6761\u4ef6\u304c\u6210\u7acb\u3057\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\u3092\u660e\u793a\u7684\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e8c\u8005\u629e\u4e00\u306e\u72b6\u6cc1\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>else\u30d6\u30ed\u30c3\u30af\u306f\u5fc5\u305a\u6700\u5f8c\u306b\u7f6e\u304b\u308c\u3001\u6761\u4ef6\u5f0f\u3092\u6301\u3061\u307e\u305b\u3093\u3002if\u6587\u306e\u6761\u4ef6\u304c\u507d\u306b\u306a\u3063\u305f\u5834\u5408\u306b\u7121\u6761\u4ef6\u3067\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">elseif\u306b\u3088\u308b\u8907\u6570\u6761\u4ef6\u306e\u9023\u9396\u7684\u306a\u8a55\u4fa1\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u8907\u6570\u306e\u6761\u4ef6\u3092\u9806\u756a\u306b\u8a55\u4fa1\u3057\u305f\u3044\u5834\u5408\u3001\u300celseif\u300d\uff08\u307e\u305f\u306f\u300celse if\u300d\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u6700\u521d\u306e\u6761\u4ef6\u304c\u507d\u3067\u3001\u6b21\u306e\u6761\u4ef6\u3092\u8a55\u4fa1\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u57fa\u672c\u69cb\u6587\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=\"\">if (\u6761\u4ef6\u5f0f1) {\n    \/\/ \u6761\u4ef6\u5f0f1\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n} elseif (\u6761\u4ef6\u5f0f2) {\n    \/\/ \u6761\u4ef6\u5f0f1\u304cfalse\u3067\u3001\u6761\u4ef6\u5f0f2\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n} elseif (\u6761\u4ef6\u5f0f3) {\n    \/\/ \u6761\u4ef6\u5f0f1\u30682\u304cfalse\u3067\u3001\u6761\u4ef6\u5f0f3\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n} else {\n    \/\/ \u3059\u3079\u3066\u306e\u6761\u4ef6\u5f0f\u304cfalse\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p>\u5b9f\u969b\u306e\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$score = 75;\n\nif ($score &gt;= 90) {\n    echo \"\u8a55\u4fa1: A\"; \/\/ 90\u70b9\u4ee5\u4e0a\n} elseif ($score &gt;= 80) {\n    echo \"\u8a55\u4fa1: B\"; \/\/ 80\u301c89\u70b9\n} elseif ($score &gt;= 70) {\n    echo \"\u8a55\u4fa1: C\"; \/\/ 70\u301c79\u70b9\n} elseif ($score &gt;= 60) {\n    echo \"\u8a55\u4fa1: D\"; \/\/ 60\u301c69\u70b9\n} else {\n    echo \"\u8a55\u4fa1: F\"; \/\/ 60\u70b9\u672a\u6e80\n}\n\/\/ \u51fa\u529b\u7d50\u679c: \"\u8a55\u4fa1: C\"\n<\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u6700\u521d\u306b\u300c$score &gt;= 90\u300d\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001false\u3067\u3042\u308c\u3070\u6b21\u306e\u300c$score &gt;= 80\u300d\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3068\u3044\u3046\u3088\u3046\u306b\u9806\u756a\u306b\u8a55\u4fa1\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u304a\u3001PHP\u3067\u306f\u300celseif\u300d\u3068\u300celse if\u300d\u306e\u4e21\u65b9\u304c\u4f7f\u7528\u53ef\u80fd\u3067\u3001\u6a5f\u80fd\u7684\u306b\u306f\u540c\u3058\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u3088\u3063\u3066\u306f\u7d71\u4e00\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">if-elseif-else\u306e\u5b9f\u884c\u30d5\u30ed\u30fc\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>if-elseif-else\u69cb\u9020\u306e\u5b9f\u884c\u30d5\u30ed\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u5b9f\u884c\u30d5\u30ed\u30fc\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6700\u521d\u306eif\u6587\u306e\u6761\u4ef6\u3092\u8a55\u4fa1<\/li>\n\n\n\n<li>true\u306a\u3089\u3001\u5bfe\u5fdc\u3059\u308b\u30d6\u30ed\u30c3\u30af\u3092\u5b9f\u884c\u3057\u3066\u69cb\u9020\u5168\u4f53\u3092\u7d42\u4e86<\/li>\n\n\n\n<li>false\u306a\u3089\u3001\u6700\u521d\u306eelseif\u6761\u4ef6\u3092\u8a55\u4fa1<\/li>\n\n\n\n<li>\u4ee5\u964d\u3001\u6761\u4ef6\u304ctrue\u306b\u306a\u308b\u307e\u3067\u5404elseif\u6761\u4ef6\u3092\u9806\u306b\u8a55\u4fa1<\/li>\n\n\n\n<li>\u3059\u3079\u3066\u306e\u6761\u4ef6\u304cfalse\u306a\u3089\u3001else\u7bc0\uff08\u5b58\u5728\u3059\u308b\u5834\u5408\uff09\u3092\u5b9f\u884c<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8a55\u4fa1\u9806\u5e8f\u306e\u91cd\u8981\u6027<\/strong> \u6761\u4ef6\u306e\u8a55\u4fa1\u306f\u4e0a\u304b\u3089\u9806\u306b\u884c\u308f\u308c\u308b\u305f\u3081\u3001\u6761\u4ef6\u306e\u9806\u5e8f\u306f\u7d50\u679c\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002 <code>\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u4f8b $age = 25; if ($age &gt; 0) { echo \"\u6b63\u306e\u5e74\u9f62\u3067\u3059\"; \/\/ \u5e38\u306b\u3053\u306e\u6761\u4ef6\u304c\u6700\u521d\u306b\u771f\u306b\u306a\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044 } elseif ($age &gt; 18) { echo \"\u6210\u4eba\u3067\u3059\"; \/\/ \u3053\u306e\u6761\u4ef6\u306f\u6c7a\u3057\u3066\u8a55\u4fa1\u3055\u308c\u306a\u3044 } else { echo \"\u7121\u52b9\u306a\u5e74\u9f62\u3067\u3059\"; } \/\/ \u4fee\u6b63\u7248 if ($age &gt; 18) { echo \"\u6210\u4eba\u3067\u3059\"; } elseif ($age &gt; 0) { echo \"\u6b63\u306e\u5e74\u9f62\uff08\u672a\u6210\u5e74\uff09\u3067\u3059\"; } else { echo \"\u7121\u52b9\u306a\u5e74\u9f62\u3067\u3059\"; }<\/code><\/li>\n\n\n\n<li><strong>\u6761\u4ef6\u306e\u91cd\u8907\u306b\u6ce8\u610f<\/strong> elseif\u3092\u4f7f\u3046\u5834\u5408\u3001\u524d\u306e\u6761\u4ef6\u3067\u9664\u5916\u3055\u308c\u305f\u7bc4\u56f2\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <code>$score = 85; \/\/ \u5197\u9577\u306a\u6761\u4ef6 if ($score &gt;= 80 &amp;&amp; $score &lt;= 100) { echo \"\u8a55\u4fa1: A \u307e\u305f\u306f B\"; } elseif ($score &gt;= 80 &amp;&amp; $score &lt; 90) { \/\/ \u5197\u9577\uff1a$score &gt;= 80\u306f\u65e2\u306b\u6700\u521d\u306e\u6761\u4ef6\u3067\u78ba\u8a8d\u6e08\u307f echo \"\u8a55\u4fa1: B\"; } \/\/ \u6700\u9069\u5316\u3055\u308c\u305f\u6761\u4ef6 if ($score &gt;= 90 &amp;&amp; $score &lt;= 100) { echo \"\u8a55\u4fa1: A\"; } elseif ($score &gt;= 80) { \/\/ $score &lt; 90\u306e\u6761\u4ef6\u306f\u4e0d\u8981\uff08\u524d\u306e\u6761\u4ef6\u3067\u9664\u5916\u6e08\u307f\uff09 echo \"\u8a55\u4fa1: B\"; }<\/code><\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e<\/strong> \u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u6761\u4ef6\u3092\u5148\u306b\u914d\u7f6e\u3059\u308b\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002 <code>\/\/ \u30e6\u30fc\u30b6\u30fc\u30bf\u30a4\u30d7\u5225\u306e\u51e6\u7406\u3067\u3001\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u304c\u6700\u3082\u591a\u3044\u5834\u5408 $userType = 'general'; \/\/ \u6700\u9069\u5316\u3055\u308c\u305f\u9806\u5e8f if ($userType === 'general') { \/\/ \u6700\u3082\u983b\u5ea6\u306e\u9ad8\u3044\u30b1\u30fc\u30b9 \/\/ \u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u51e6\u7406 } elseif ($userType === 'premium') { \/\/ \u30d7\u30ec\u30df\u30a2\u30e0\u30e6\u30fc\u30b6\u30fc\u51e6\u7406 } elseif ($userType === 'admin') { \/\/ \u7ba1\u7406\u8005\u51e6\u7406\uff08\u6700\u3082\u983b\u5ea6\u304c\u4f4e\u3044\uff09 }<\/code><\/li>\n\n\n\n<li><strong>\u53ef\u8aad\u6027\u3092\u512a\u5148\u3059\u308b<\/strong> \u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3088\u308a\u3082\u53ef\u8aad\u6027\u3084\u8ad6\u7406\u7684\u306a\u9806\u5e8f\u3092\u512a\u5148\u3059\u3079\u304d\u3067\u3059\u3002 <code>\/\/ \u5e74\u9f62\u306b\u3088\u308b\u6761\u4ef6\u5206\u5c90 $age = 30; \/\/ \u8ad6\u7406\u7684\u9806\u5e8f\uff08\u82e5\u3044\u9806\uff09\u3092\u512a\u5148 if ($age &lt; 13) { echo \"\u5b50\u4f9b\"; } elseif ($age &lt; 20) { echo \"\u30c6\u30a3\u30fc\u30f3\u30a8\u30a4\u30b8\u30e3\u30fc\"; } elseif ($age &lt; 65) { echo \"\u5927\u4eba\"; } else { echo \"\u30b7\u30cb\u30a2\"; }<\/code><\/li>\n<\/ol>\n\n\n\n<p>\u9069\u5207\u306aif-elseif-else\u69cb\u9020\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u6761\u4ef6\u306e\u9806\u5e8f\u3068\u8ad6\u7406\u7684\u306a\u6d41\u308c\u306b\u6ce8\u610f\u3057\u3066\u8a2d\u8a08\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">PHP\u306eif\u6587\u306b\u304a\u3051\u308b\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u6d3b\u7528\u6cd5<\/h2>\n\n\n\n<p>\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001PHP\u3067\u306f\u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u4e3b\u8981\u306a\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u3068\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">AND\u6f14\u7b97\u5b50\uff08&amp;&amp;\uff09\u3067\u8907\u6570\u6761\u4ef6\u3092\u3059\u3079\u3066\u6e80\u305f\u3059\u5224\u5b9a<\/h3>\n\n\n\n<p>AND\u6f14\u7b97\u5b50\u306f\u3001\u8907\u6570\u306e\u6761\u4ef6\u304c\u3059\u3079\u3066\u771f(true)\u306e\u5834\u5408\u306b\u306e\u307f\u771f\u3092\u8fd4\u3057\u307e\u3059\u3002\u4e00\u3064\u3067\u3082\u507d(false)\u306e\u6761\u4ef6\u304c\u3042\u308c\u3070\u3001\u7d50\u679c\u306f\u507d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u3067\u306f\u3001<code>&amp;&amp;<\/code> \u3068 <code>and<\/code> \u306e2\u7a2e\u985e\u306eAND\u6f14\u7b97\u5b50\u304c\u3042\u308a\u307e\u3059\u304c\u3001<code>&amp;&amp;<\/code> \u306e\u65b9\u304c\u4e00\u822c\u7684\u3067\u512a\u5148\u9806\u4f4d\u3082\u9ad8\u3044\u305f\u3081\u3001\u3053\u3061\u3089\u306e\u4f7f\u7528\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\nif ($age &gt;= 18 &amp;&amp; $hasId === true) {\n    echo \"\u5165\u5834\u53ef\u80fd\u3067\u3059\u3002\"; \/\/ 18\u6b73\u4ee5\u4e0a\u304b\u3064ID\u3092\u6301\u3063\u3066\u3044\u308b\u5834\u5408\n}\n\n\/\/ \u8907\u6570\u6761\u4ef6\u306e\u9023\u7d50\nif ($score &gt;= 70 &amp;&amp; $attendance &gt;= 80 &amp;&amp; $submitted === true) {\n    echo \"\u5408\u683c\u3067\u3059\u3002\"; \/\/ \u5f97\u70b9\u3001\u51fa\u5e2d\u7387\u3001\u63d0\u51fa\u72b6\u6cc1\u306e3\u6761\u4ef6\u3059\u3079\u3066\u3092\u6e80\u305f\u3059\u5834\u5408\n}\n<\/pre>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306e\u6d3b\u7528\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d5\u30a9\u30fc\u30e0\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u4f8b\nif (strlen($password) &gt;= 8 &amp;&amp; preg_match('\/[A-Z]\/', $password) &amp;&amp; preg_match('\/[0-9]\/', $password)) {\n    \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u9577\u3055\u304c8\u6587\u5b57\u4ee5\u4e0a\u3001\u304b\u3064\u5927\u6587\u5b57\u3092\u542b\u307f\u3001\u304b\u3064\u6570\u5b57\u3092\u542b\u3080\u5834\u5408\n    echo \"\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u9ad8\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u3059\u3002\";\n} else {\n    echo \"\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u305b\u3093\u3002\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">OR\u6f14\u7b97\u5b50\uff08||\uff09\u3067\u3044\u305a\u308c\u304b\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5224\u5b9a<\/h3>\n\n\n\n<p>OR\u6f14\u7b97\u5b50\u306f\u3001\u8907\u6570\u306e\u6761\u4ef6\u306e\u3046\u3061\u5c11\u306a\u304f\u3068\u30821\u3064\u304c\u771f(true)\u3067\u3042\u308c\u3070\u771f\u3092\u8fd4\u3057\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u6761\u4ef6\u304c\u507d(false)\u306e\u5834\u5408\u306b\u306e\u307f\u3001\u7d50\u679c\u306f\u507d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>PHP\u3067\u306f\u3001<code>||<\/code> \u3068 <code>or<\/code> \u306e2\u7a2e\u985e\u306eOR\u6f14\u7b97\u5b50\u304c\u3042\u308a\u307e\u3059\u304c\u3001<code>||<\/code> \u306e\u65b9\u304c\u4e00\u822c\u7684\u3067\u512a\u5148\u9806\u4f4d\u3082\u9ad8\u3044\u305f\u3081\u3001\u3053\u3061\u3089\u306e\u4f7f\u7528\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\nif ($userRole === 'admin' || $userRole === 'editor') {\n    echo \"\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u7de8\u96c6\u6a29\u9650\u304c\u3042\u308a\u307e\u3059\u3002\"; \/\/ \u7ba1\u7406\u8005\u307e\u305f\u306f\u30a8\u30c7\u30a3\u30bf\u30fc\u306e\u5834\u5408\n}\n\n\/\/ \u8907\u6570\u6761\u4ef6\u306e\u9023\u7d50\nif ($isHoliday || $isWeekend || $hasTimeOff) {\n    echo \"\u51fa\u52e4\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\"; \/\/ \u4f11\u65e5\u3001\u9031\u672b\u3001\u4f11\u6687\u306e\u3044\u305a\u308c\u304b\u306e\u5834\u5408\n}\n<\/pre>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306e\u6d3b\u7528\u4f8b\uff1a\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u306e\u4f8b\nif ($result === null || $result === false || $result === '') {\n    \/\/ \u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u5834\u5408\uff08null\uff09\u3001\u307e\u305f\u306f\u7d50\u679c\u304cfalse\u3001\u307e\u305f\u306f\u7a7a\u6587\u5b57\u5217\u306e\u5834\u5408\n    echo \"\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\";\n} else {\n    echo \"\u51e6\u7406\u304c\u6210\u529f\u3057\u307e\u3057\u305f\u3002\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">NOT\u6f14\u7b97\u5b50\uff08!\uff09\u3067\u6761\u4ef6\u3092\u53cd\u8ee2\u3055\u305b\u308b\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>NOT\u6f14\u7b97\u5b50\u306f\u3001\u6761\u4ef6\u306e\u771f\u507d\u3092\u53cd\u8ee2\u3055\u305b\u307e\u3059\u3002\u6761\u4ef6\u304c\u771f(true)\u306a\u3089\u507d(false)\u306b\u3001\u507d\u306a\u3089\u771f\u306b\u5909\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\nif (!$isLoggedIn) {\n    echo \"\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u304f\u3060\u3055\u3044\u3002\"; \/\/ \u30ed\u30b0\u30a4\u30f3\u3057\u3066\u3044\u306a\u3044\u5834\u5408\n}\n\n\/\/ \u771f\u507d\u5024\u306e\u53cd\u8ee2\n$isAvailable = true;\nif (!$isAvailable) {\n    echo \"\u73fe\u5728\u5229\u7528\u3067\u304d\u307e\u305b\u3093\u3002\"; \/\/ $isAvailable\u304cfalse\u306e\u5834\u5408\n}\n<\/pre>\n\n\n\n<p>NOT\u6f14\u7b97\u5b50\u306f\u7279\u306b\u3001\u5426\u5b9a\u6761\u4ef6\u3092\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u8868\u73fe\u3059\u308b\u305f\u3081\u306b\u6709\u7528\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5426\u5b9a\u5f62\u306e\u6761\u4ef6\nif (!empty($array)) {\n    \/\/ \u914d\u5217\u304c\u7a7a\u3067\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n}\n\n\/\/ \u6761\u4ef6\u306e\u5426\u5b9a\u3092\u4f7f\u3063\u305f\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\nif (!file_exists($filename)) {\n    echo \"\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\u3002\";\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u8907\u96d1\u306a\u6761\u4ef6\u3092\u898b\u3084\u3059\u304f\u6574\u7406\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u8907\u96d1\u306a\u6761\u4ef6\u3092\u4f5c\u6210\u3059\u308b\u5834\u5408\u3001\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">1. \u62ec\u5f27\u3092\u4f7f\u3063\u305f\u512a\u5148\u9806\u4f4d\u306e\u660e\u793a<\/h4>\n\n\n\n<p>\u8ad6\u7406\u6f14\u7b97\u5b50\u306b\u306f\u512a\u5148\u9806\u4f4d\u304c\u3042\u308a\u307e\u3059\uff08! &gt; &amp;&amp; &gt; ||\uff09\u3002\u62ec\u5f27\u3092\u4f7f\u7528\u3057\u3066\u512a\u5148\u9806\u4f4d\u3092\u660e\u793a\u7684\u306b\u793a\u3059\u3068\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u62ec\u5f27\u306a\u3057 - \u8aad\u307f\u306b\u304f\u3044\nif ($a &gt; 5 &amp;&amp; $b &lt; 10 || $c == 15 &amp;&amp; $d != 20) {\n    \/\/ \u51e6\u7406\n}\n\n\/\/ \u62ec\u5f27\u3042\u308a - \u8aad\u307f\u3084\u3059\u3044\nif (($a &gt; 5 &amp;&amp; $b &lt; 10) || ($c == 15 &amp;&amp; $d != 20)) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-14\">2. \u8907\u96d1\u306a\u6761\u4ef6\u306e\u5206\u5272<\/h4>\n\n\n\n<p>\u975e\u5e38\u306b\u8907\u96d1\u306a\u6761\u4ef6\u306f\u3001\u5909\u6570\u306b\u5206\u3051\u308b\u3053\u3068\u3067\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3092\u76f4\u63a5\u8a18\u8ff0\nif (($userAge &gt;= 18 &amp;&amp; $userHasId) || ($userAge &gt;= 16 &amp;&amp; $userHasParentalConsent &amp;&amp; $isSpecialEvent)) {\n    \/\/ \u51e6\u7406\n}\n\n\/\/ \u6761\u4ef6\u3092\u5909\u6570\u306b\u5206\u5272\u3057\u3066\u53ef\u8aad\u6027\u3092\u5411\u4e0a\n$isAdult = $userAge &gt;= 18 &amp;&amp; $userHasId;\n$isMinorWithConsent = $userAge &gt;= 16 &amp;&amp; $userHasParentalConsent &amp;&amp; $isSpecialEvent;\n\nif ($isAdult || $isMinorWithConsent) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">3. \u8907\u5408\u6761\u4ef6\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/h4>\n\n\n\n<p>\u8ad6\u7406\u6cd5\u5247\u3092\u6d3b\u7528\u3057\u3066\u6761\u4ef6\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5143\u306e\u6761\u4ef6\uff08\u5197\u9577\uff09\nif ($userType === 'admin' || ($userType === 'editor' &amp;&amp; $userHasPermission)) {\n    \/\/ \u51e6\u7406\n}\n\n\/\/ \u30a8\u30c7\u30a3\u30bf\u30fc\u306e\u5834\u5408\u306e\u307f\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408\nif ($userType === 'admin' || ($userType === 'editor' &amp;&amp; $userHasPermission)) {\n    \/\/ \u51e6\u7406\n}\n<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">4. \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u6761\u4ef6\u304c\u8907\u96d1\u306b\u306a\u308b\u5834\u5408\u3001\u30cd\u30b9\u30c8\u3092\u6df1\u304f\u3059\u308b\u3088\u308a\u3082\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3046\u3068\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6761\u4ef6\u306e\u30cd\u30b9\u30c8\uff08\u8aad\u307f\u306b\u304f\u3044\uff09\nfunction checkAccess($user) {\n    if ($user-&gt;isActive()) {\n        if ($user-&gt;isAdmin() || $user-&gt;hasPermission('edit')) {\n            if (!$site-&gt;isUnderMaintenance() || $user-&gt;canAccessDuringMaintenance()) {\n                return true;\n            }\n        }\n    }\n    return false;\n}\n\n\/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\uff08\u8aad\u307f\u3084\u3059\u3044\uff09\nfunction checkAccess($user) {\n    \/\/ \u6761\u4ef6\u3092\u5426\u5b9a\u3057\u3066\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    if (!$user-&gt;isActive()) {\n        return false;\n    }\n    \n    if (!($user-&gt;isAdmin() || $user-&gt;hasPermission('edit'))) {\n        return false;\n    }\n    \n    if ($site-&gt;isUnderMaintenance() &amp;&amp; !$user-&gt;canAccessDuringMaintenance()) {\n        return false;\n    }\n    \n    return true;\n}\n<\/pre>\n\n\n\n<p>\u8ad6\u7406\u6f14\u7b97\u5b50\u3092\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3082\u52b9\u7387\u7684\u304b\u3064\u53ef\u8aad\u6027\u9ad8\u304f\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u6761\u4ef6\u306e\u8907\u96d1\u3055\u306b\u5fdc\u3058\u3066\u3001\u4e0a\u8a18\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u6700\u9069\u306a\u8868\u73fe\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">if\u6587\u306e\u7701\u7565\u5f62\u3068\u4ee3\u66ff\u8868\u73fe<\/h2>\n\n\n\n<p>\u901a\u5e38\u306eif-else\u6587\u306f\u660e\u793a\u7684\u3067\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u304c\u3001\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u306b\u3059\u308b\u305f\u3081\u306b\u5f79\u7acb\u3064\u7701\u7565\u5f62\u3084\u4ee3\u66ff\u8868\u73fe\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u3046\u3053\u3068\u3067\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u7c21\u6f54\u3055\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u4e09\u9805\u6f14\u7b97\u5b50\u3067if-else\u30921\u884c\u3067\u66f8\u304f\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4e09\u9805\u6f14\u7b97\u5b50\uff08ternary operator\uff09\u306f\u3001\u5358\u7d14\u306aif-else\u6587\u30921\u884c\u3067\u8868\u73fe\u3067\u304d\u308b\u4fbf\u5229\u306a\u69cb\u6587\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u69cb\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024\n<\/pre>\n\n\n\n<p><strong>\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306eif-else\u6587\n$message = '';\nif ($age &gt;= 18) {\n    $message = '\u6210\u4eba\u3067\u3059';\n} else {\n    $message = '\u672a\u6210\u5e74\u3067\u3059';\n}\n\n\/\/ \u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\n$message = ($age &gt;= 18) ? '\u6210\u4eba\u3067\u3059' : '\u672a\u6210\u5e74\u3067\u3059';\n<\/pre>\n\n\n\n<p>\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u5024\u3092\u8fd4\u3059\u5f0f\u306a\u306e\u3067\u3001\u5909\u6570\u3078\u306e\u4ee3\u5165\u3084\u95a2\u6570\u306e\u5f15\u6570\u306a\u3069\u3067\u7279\u306b\u6709\u7528\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u95a2\u6570\u306e\u5f15\u6570\u3068\u3057\u3066\necho '\u72b6\u614b: ' . (($isActive) ? '\u30a2\u30af\u30c6\u30a3\u30d6' : '\u975e\u30a2\u30af\u30c6\u30a3\u30d6');\n\n\/\/ \u914d\u5217\u306e\u8981\u7d20\u3068\u3057\u3066\n$userData = [\n    'name' =&gt; $name,\n    'status' =&gt; ($isVerified) ? 'verified' : 'pending'\n];\n<\/pre>\n\n\n\n<p><strong>\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u30cd\u30b9\u30c8\uff1a<\/strong><\/p>\n\n\n\n<p>\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u30cd\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001\u904e\u5ea6\u306a\u4f7f\u7528\u306f\u53ef\u8aad\u6027\u3092\u640d\u306a\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=\"\">\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u4e09\u9805\u6f14\u7b97\u5b50\uff08\u8907\u96d1\u3067\u8aad\u307f\u306b\u304f\u3044\uff09\n$userStatus = ($isLoggedIn) \n    ? (($isAdmin) ? '\u7ba1\u7406\u8005' : (($isPremium) ? '\u30d7\u30ec\u30df\u30a2\u30e0\u4f1a\u54e1' : '\u4e00\u822c\u4f1a\u54e1')) \n    : '\u30b2\u30b9\u30c8';\n\n\/\/ if-elseif\u3092\u4f7f\u7528\u3057\u305f\u65b9\u304c\u8aad\u307f\u3084\u3059\u3044\u5834\u5408\nif ($isLoggedIn) {\n    if ($isAdmin) {\n        $userStatus = '\u7ba1\u7406\u8005';\n    } elseif ($isPremium) {\n        $userStatus = '\u30d7\u30ec\u30df\u30a2\u30e0\u4f1a\u54e1';\n    } else {\n        $userStatus = '\u4e00\u822c\u4f1a\u54e1';\n    }\n} else {\n    $userStatus = '\u30b2\u30b9\u30c8';\n}\n<\/pre>\n\n\n\n<p><strong>\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u7d14\u306a\u6761\u4ef6\u5206\u5c90\u306b\u306e\u307f\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u306b\u306fif-else\u6587\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u4e09\u9805\u6f14\u7b97\u5b50\u304c3\u30ec\u30d9\u30eb\u4ee5\u4e0a\u306b\u30cd\u30b9\u30c8\u3059\u308b\u5834\u5408\u306f\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306bif-else\u3092\u691c\u8a0e\u3059\u308b<\/li>\n\n\n\n<li>\u62ec\u5f27\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u5f0f\u3092\u660e\u78ba\u306b\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">null\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u3067null\u5224\u5b9a\u3092\u7c21\u6f54\u306b<\/h3>\n\n\n\n<p>PHP 7.0\u3067\u5c0e\u5165\u3055\u308c\u305fnull\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u306f\u3001\u5909\u6570\u304cnull\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u69cb\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u5de6\u8fba ?? \u53f3\u8fba\n<\/pre>\n\n\n\n<p>\u5de6\u8fba\u304cnull\u3067\u306a\u3044\u5834\u5408\u306f\u305d\u306e\u5024\u3092\u3001null\u306e\u5834\u5408\u306f\u53f3\u8fba\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u65b9\u6cd5\uff08isset\u4f7f\u7528\uff09\n$username = isset($_GET['user']) ? $_GET['user'] : '\u30b2\u30b9\u30c8';\n\n\/\/ null\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n$username = $_GET['user'] ?? '\u30b2\u30b9\u30c8';\n<\/pre>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\u306f\u9023\u9396\u3055\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6700\u521d\u306enull\u3067\u306a\u3044\u5024\u304c\u4f7f\u7528\u3055\u308c\u308b\n$name = $firstName ?? $username ?? $email ?? 'Anonymous';\n<\/pre>\n\n\n\n<p><strong>null\u5408\u4f53\u6f14\u7b97\u5b50\u3068\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u9055\u3044\uff1a<\/strong><\/p>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\uff08??\uff09\u306f\u53b3\u5bc6\u306bnull\u306e\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u307e\u3059\u304c\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u3067\u4f7f\u308f\u308c\u308b\u6761\u4ef6\u306f\u4efb\u610f\u306e\u771f\u507d\u5024\u8a55\u4fa1\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u7570\u306a\u308b\u52d5\u4f5c\u306e\u6bd4\u8f03\n\n\/\/ \u7a7a\u6587\u5b57\u5217\u306e\u5834\u5408\n$value = '';\n$result1 = $value ?: '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ '\u30c7\u30d5\u30a9\u30eb\u30c8'\u304c\u8fd4\u3055\u308c\u308b\uff08\u7a7a\u6587\u5b57\u5217\u306ffalse\u3068\u8a55\u4fa1\uff09\n$result2 = $value ?? '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ ''\uff08\u7a7a\u6587\u5b57\u5217\uff09\u304c\u8fd4\u3055\u308c\u308b\uff08null\u3067\u306f\u306a\u3044\u305f\u3081\uff09\n\n\/\/ 0\u306e\u5834\u5408\n$value = 0;\n$result1 = $value ?: '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ '\u30c7\u30d5\u30a9\u30eb\u30c8'\u304c\u8fd4\u3055\u308c\u308b\uff080\u306ffalse\u3068\u8a55\u4fa1\uff09\n$result2 = $value ?? '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ 0\u304c\u8fd4\u3055\u308c\u308b\uff08null\u3067\u306f\u306a\u3044\u305f\u3081\uff09\n<\/pre>\n\n\n\n<p>null\u5408\u4f53\u6f14\u7b97\u5b50\u306f\u7279\u306b\u914d\u5217\u306e\u8981\u7d20\u3084\u95a2\u6570\u306e\u623b\u308a\u5024\u304cnull\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5834\u5408\u306b\u4fbf\u5229\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u914d\u5217\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\n$data = ['name' =&gt; 'John'];\n$city = $data['city'] ?? 'Unknown';  \/\/ 'Unknown'\u304c\u8fd4\u3055\u308c\u308b\n\n\/\/ \u95a2\u6570\u304c\u8fd4\u3059\u53ef\u80fd\u6027\u306e\u3042\u308bnull\u5024\u306e\u51e6\u7406\n$result = findUser($id) ?? createDefaultUser();\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\u3057\u305f\u30b3\u30fc\u30c9\u7c21\u7565\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>PHP\u306e\u8ad6\u7406\u6f14\u7b97\u5b50\uff08&amp;&amp;, ||\uff09\u306f\u300c\u77ed\u7d61\u8a55\u4fa1\u300d\u3068\u547c\u3070\u308c\u308b\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u3001\u6761\u4ef6\u4ed8\u304d\u51e6\u7406\u3092\u7c21\u6f54\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u77ed\u7d61\u8a55\u4fa1\u3068\u306f\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\u6761\u4ef6A &amp;&amp; \u6761\u4ef6B<\/code>\uff1a\u6761\u4ef6A\u304cfalse\u306e\u5834\u5408\u3001\u6761\u4ef6B\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044<\/li>\n\n\n\n<li><code>\u6761\u4ef6A || \u6761\u4ef6B<\/code>\uff1a\u6761\u4ef6A\u304ctrue\u306e\u5834\u5408\u3001\u6761\u4ef6B\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u7279\u6027\u3092\u5229\u7528\u3059\u308b\u3068\u3001\u5358\u7d14\u306a\u6761\u4ef6\u51e6\u7406\u3092\u7c21\u6f54\u306b\u66f8\u3051\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>AND\uff08&amp;&amp;\uff09\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5b9f\u884c\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306eif\u6587\nif ($isLoggedIn) {\n    redirectToDashboard();\n}\n\n\/\/ \u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\u3057\u305f\u7c21\u7565\u5316\n$isLoggedIn &amp;&amp; redirectToDashboard();\n<\/pre>\n\n\n\n<p><strong>OR\uff08||\uff09\u3092\u4f7f\u3063\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306eif\u6587\nif (empty($username)) {\n    $username = '\u30b2\u30b9\u30c8';\n}\n\n\/\/ \u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\u3057\u305f\u7c21\u7565\u5316\n$username = $username || '\u30b2\u30b9\u30c8';\n<\/pre>\n\n\n\n<p><strong>\u5b9f\u7528\u7684\u306a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u306e\u5b58\u5728\u78ba\u8a8d\u3068\u51e6\u7406\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306eif\u6587\nif (file_exists($filename)) {\n    include $filename;\n}\n\n\/\/ \u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\nfile_exists($filename) &amp;&amp; include $filename;\n<\/pre>\n\n\n\n<p>\u6761\u4ef6\u4ed8\u304d\u306e\u30ed\u30b0\u8a18\u9332\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u901a\u5e38\u306eif\u6587\nif ($debug) {\n    logMessage($errorInfo);\n}\n\n\/\/ \u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\n$debug &amp;&amp; logMessage($errorInfo);\n<\/pre>\n\n\n\n<p><strong>OR\u6f14\u7b97\u5b50\u3068 null\u5408\u4f53\u6f14\u7b97\u5b50\u306e\u9055\u3044\uff1a<\/strong><\/p>\n\n\n\n<p>\u77ed\u7d61\u8a55\u4fa1\u3092\u4f7f\u3063\u305fOR\u6f14\u7b97\u5b50\u3068\u3001null\u5408\u4f53\u6f14\u7b97\u5b50\u306e\u52d5\u4f5c\u306e\u9055\u3044\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$value = '';\n$result1 = $value || '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ '\u30c7\u30d5\u30a9\u30eb\u30c8'\uff08\u7a7a\u6587\u5b57\u5217\u306ffalse\u3068\u8a55\u4fa1\uff09\n$result2 = $value ?? '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ ''\uff08\u7a7a\u6587\u5b57\u5217\u306fnull\u3067\u306f\u306a\u3044\uff09\n\n$value = 0;\n$result1 = $value || '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ '\u30c7\u30d5\u30a9\u30eb\u30c8'\uff080\u306ffalse\u3068\u8a55\u4fa1\uff09\n$result2 = $value ?? '\u30c7\u30d5\u30a9\u30eb\u30c8';  \/\/ 0\uff080\u306fnull\u3067\u306f\u306a\u3044\uff09\n<\/pre>\n\n\n\n<p><strong>\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/strong><\/p>\n\n\n\n<p>\u77ed\u7d61\u8a55\u4fa1\u306b\u3088\u308b\u30b3\u30fc\u30c9\u7c21\u7565\u5316\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u9069\u5207\u306a\u4f7f\u7528\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u526f\u4f5c\u7528\u3092\u6301\u3064\u95a2\u6570\uff08\u72b6\u614b\u3092\u5909\u66f4\u3059\u308b\u95a2\u6570\uff09\u3068\u306e\u4f75\u7528\u306f\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u8aad\u307f\u624b\u304c\u6df7\u4e71\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u91cd\u8981\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306b\u306f\u901a\u5e38\u306eif\u6587\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u660e\u78ba<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3088\u308a\u53ef\u8aad\u6027\u3092\u512a\u5148\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7701\u7565\u5f62\u3068\u4ee3\u66ff\u8868\u73fe\u3092\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u306b\u3057\u3064\u3064\u3001\u610f\u56f3\u3092\u660e\u78ba\u306b\u4f1d\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5358\u7d14\u306a\u6761\u4ef6\u51e6\u7406\u3084\u5024\u306e\u8a2d\u5b9a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u5272\u308a\u5f53\u3066\u306a\u3069\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-21\">\u6761\u4ef6\u5206\u5c90\u306e\u30cd\u30b9\u30c8\uff08\u5165\u308c\u5b50\uff09\u3068\u305d\u306e\u6700\u9069\u5316<\/h2>\n\n\n\n<p>\u8907\u96d1\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u969b\u3001\u6761\u4ef6\u5206\u5c90\u3092\u30cd\u30b9\u30c8\uff08\u5165\u308c\u5b50\uff09\u306b\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u3048\u3070\u4fbf\u5229\u3067\u3059\u304c\u3001\u904e\u5ea6\u306a\u30cd\u30b9\u30c8\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3084\u4fdd\u5b88\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30cd\u30b9\u30c8\u306e\u57fa\u672c\u304b\u3089\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u306e\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9<\/h3>\n\n\n\n<p>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u3068\u306f\u3001if\u6587\u306e\u4e2d\u306b\u5225\u306eif\u6587\u3092\u914d\u7f6e\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u8907\u6570\u306e\u6761\u4ef6\u3092\u6bb5\u968e\u7684\u306b\u8a55\u4fa1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if (\u6761\u4ef6A) {\n    \/\/ \u6761\u4ef6A\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n    \n    if (\u6761\u4ef6B) {\n        \/\/ \u6761\u4ef6A\u3068\u6761\u4ef6B\u306e\u4e21\u65b9\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n    \n\nAfter\uff08early return\u30d1\u30bf\u30fc\u30f3\uff09\uff1a\n```php\nfunction registerUser($userData) {\n    \/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u691c\u8a3c\n    if (!isset($userData['email']) || !filter_var($userData['email'], FILTER_VALIDATE_EMAIL)) {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044'\n        ];\n    }\n    \n    \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\n    if (!isset($userData['password']) || strlen($userData['password']) &lt; 8) {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f8\u6587\u5b57\u4ee5\u4e0a\u5fc5\u8981\u3067\u3059'\n        ];\n    }\n    \n    \/\/ \u65e2\u5b58\u30e6\u30fc\u30b6\u30fc\u306e\u30c1\u30a7\u30c3\u30af\n    if (userExists($userData['email'])) {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u3053\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u65e2\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059'\n        ];\n    }\n    \n    \/\/ \u3053\u3053\u304b\u3089\u5148\u306f\u3059\u3079\u3066\u306e\u691c\u8a3c\u3092\u901a\u904e\u3057\u305f\u30c7\u30fc\u30bf\u306e\u51e6\u7406\n    $user = new User();\n    $user-&gt;email = $userData['email'];\n    $user-&gt;password = hashPassword($userData['password']);\n    $user-&gt;save();\n    \n    return [\n        'success' =&gt; true,\n        'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u767b\u9332\u3055\u308c\u307e\u3057\u305f'\n    ];\n}\n<\/pre>\n\n\n\n<p>early return\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u6d41\u308c\u304c\u76f4\u7dda\u7684\u306b\u306a\u308a\u3001\u30e1\u30a4\u30f3\u306e\u30ed\u30b8\u30c3\u30af\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u306e\u610f\u56f3\u3082\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30ac\u30fc\u30c9\u7bc0\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff1a<\/strong><\/p>\n\n\n\n<p>\u7279\u306b\u5165\u529b\u5024\u306e\u691c\u8a3c\uff08\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff09\u3067\u306f\u3001\u30ac\u30fc\u30c9\u7bc0\u30d1\u30bf\u30fc\u30f3\u3068\u547c\u3070\u308c\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u52b9\u679c\u7684\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function processPayment($amount, $creditCard) {\n    \/\/ \u30ac\u30fc\u30c9\u7bc0\uff1a\u7121\u52b9\u306a\u5165\u529b\u3092\u65e9\u671f\u306b\u5f3e\u304f\n    if ($amount &lt;= 0) {\n        throw new InvalidArgumentException('\u91d1\u984d\u306f\u6b63\u306e\u6570\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059');\n    }\n    \n    if (!$creditCard-&gt;isValid()) {\n        throw new PaymentException('\u7121\u52b9\u306a\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u3067\u3059');\n    }\n    \n    if ($amount &gt; $creditCard-&gt;getLimit()) {\n        throw new PaymentException('\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u306e\u9650\u5ea6\u984d\u3092\u8d85\u3048\u3066\u3044\u307e\u3059');\n    }\n    \n    \/\/ \u3059\u3079\u3066\u306e\u524d\u63d0\u6761\u4ef6\u3092\u6e80\u305f\u3057\u305f\u5834\u5408\u306e\u307f\u3053\u3053\u306b\u5230\u9054\n    return $this-&gt;gateway-&gt;charge($creditCard, $amount);\n}\n<\/pre>\n\n\n\n<p>\u30ac\u30fc\u30c9\u7bc0\u3067\u306f\u3001\u7121\u52b9\u306a\u6761\u4ef6\u3092\u691c\u51fa\u3057\u305f\u3089\u3059\u3050\u306b\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u304b\u3001\u30a8\u30e9\u30fc\u5024\u3092\u8fd4\u3057\u3066\u95a2\u6570\u304b\u3089\u629c\u3051\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e1\u30a4\u30f3\u306e\u51e6\u7406\u30ed\u30b8\u30c3\u30af\u306f\u524d\u63d0\u6761\u4ef6\u304c\u3059\u3079\u3066\u6e80\u305f\u3055\u308c\u305f\u72b6\u614b\u3067\u5b9f\u884c\u3055\u308c\u308b\u305f\u3081\u3001\u30cd\u30b9\u30c8\u304c\u6e1b\u308a\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u306e\u30cd\u30b9\u30c8\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306f\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002deep nesting\u3092\u907f\u3051\u3001early return\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u3066\u3001\u30af\u30ea\u30fc\u30f3\u3067\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u76ee\u6307\u3057\u307e\u3057\u3087\u3046\u3002 else { \/\/ \u6761\u4ef6A\u304c\u771f\u3067\u6761\u4ef6B\u304c\u507d\u306e\u5834\u5408\u306e\u51e6\u7406 } } else { \/\/ \u6761\u4ef6A\u304c\u507d\u306e\u5834\u5408\u306e\u51e6\u7406 }<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\n**\u5b9f\u969b\u306e\u4f8b\uff1a**\n\n```php\n\/\/ \u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3068\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u306e\u4f8b\nif ($user-&gt;isLoggedIn()) {\n    echo \"\u30ed\u30b0\u30a4\u30f3\u6e08\u307f\u3067\u3059\u3002&lt;br&gt;\";\n    \n    if ($user-&gt;hasPermission('admin')) {\n        echo \"\u7ba1\u7406\u8005\u30da\u30fc\u30b8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\";\n    } else {\n        echo \"\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002\";\n    }\n} else {\n    echo \"\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u304f\u3060\u3055\u3044\u3002\";\n}\n<\/pre>\n\n\n\n<p>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u3067\u306f\u3001\u9069\u5207\u306a\u30a4\u30f3\u30c7\u30f3\u30c8\uff08\u5b57\u4e0b\u3052\uff09\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u69cb\u9020\u304c\u8996\u899a\u7684\u306b\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u6df1\u3044\u30cd\u30b9\u30c8\u3092\u907f\u3051\u3066\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30cd\u30b9\u30c8\u304c3\u30ec\u30d9\u30eb\u4ee5\u4e0a\u306b\u6df1\u304f\u306a\u308b\u3068\u3001\u3044\u308f\u3086\u308b\u300c\u30a2\u30ed\u30fc\u30a2\u30f3\u30c1\u30d1\u30bf\u30fc\u30f3\u300d\u3084\u300c\u30d4\u30e9\u30df\u30c3\u30c9\u30aa\u30d6\u30c9\u30a5\u30fc\u30e0\uff08\u7834\u6ec5\u306e\u30d4\u30e9\u30df\u30c3\u30c9\uff09\u300d\u3068\u547c\u3070\u308c\u308b\u72b6\u614b\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5927\u5e45\u306b\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6df1\u3044\u30cd\u30b9\u30c8\u306e\u554f\u984c\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6df1\u3059\u304e\u308b\u30cd\u30b9\u30c8\uff08\u8aad\u307f\u306b\u304f\u3044\uff09\nfunction processOrder($order, $user, $inventory) {\n    if ($order) {\n        if ($user) {\n            if ($user-&gt;isActive()) {\n                if ($order-&gt;items) {\n                    foreach ($order-&gt;items as $item) {\n                        if ($inventory-&gt;hasStock($item-&gt;id)) {\n                            \/\/ \u5b9f\u969b\u306e\u51e6\u7406\uff08\u3053\u3053\u306b\u305f\u3069\u308a\u7740\u304f\u307e\u3067\u304c\u5927\u5909\uff09\n                        } else {\n                            return \"\u5728\u5eab\u4e0d\u8db3\u3067\u3059\";\n                        }\n                    }\n                } else {\n                    return \"\u6ce8\u6587\u306b\u5546\u54c1\u304c\u3042\u308a\u307e\u305b\u3093\";\n                }\n            } else {\n                return \"\u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u7121\u52b9\u3067\u3059\";\n            }\n        } else {\n            return \"\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\";\n        }\n    } else {\n        return \"\u6ce8\u6587\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\";\n    }\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306f\u3001\u30ed\u30b8\u30c3\u30af\u3092\u8ffd\u3046\u306e\u304c\u56f0\u96e3\u3067\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u3082\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6df1\u3044\u30cd\u30b9\u30c8\u3092\u907f\u3051\u308b\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u306e\u53cd\u8ee2\u3068\u65e9\u671f\u30ea\u30bf\u30fc\u30f3<\/strong> \u5426\u5b9a\u6761\u4ef6\u3092\u5148\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306f\u65e9\u671f\u306b\u95a2\u6570\u304b\u3089\u629c\u3051\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u305b\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u8907\u5408\u6761\u4ef6\u306e\u4f7f\u7528<\/strong> \u8907\u6570\u306e\u6761\u4ef6\u3092\u8ad6\u7406\u6f14\u7b97\u5b50\uff08&amp;&amp;, ||\uff09\u3067\u7d50\u5408\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u305b\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30ac\u30fc\u30c9\u7bc0\u30d1\u30bf\u30fc\u30f3\u306e\u63a1\u7528<\/strong> \u95a2\u6570\u306e\u5192\u982d\u3067\u524d\u63d0\u6761\u4ef6\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306f\u65e9\u671f\u306b\u30ea\u30bf\u30fc\u30f3\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u95a2\u6570\u306e\u62bd\u51fa<\/strong> \u8907\u96d1\u306a\u6761\u4ef6\u30ed\u30b8\u30c3\u30af\u3092\u5225\u306e\u95a2\u6570\u306b\u62bd\u51fa\u3057\u3001\u30e1\u30a4\u30f3\u306e\u30b3\u30fc\u30c9\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3061\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p><strong>\u6539\u5584\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6761\u4ef6\u306e\u53cd\u8ee2\u3068\u8ad6\u7406\u6f14\u7b97\u5b50\u306b\u3088\u308b\u6539\u5584\nfunction validateOrderData($order, $user) {\n    if (!$order) {\n        return \"\u6ce8\u6587\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\";\n    }\n    \n    if (!$user || !$user-&gt;isActive()) {\n        return \"\u30e6\u30fc\u30b6\u30fc\u304c\u7121\u52b9\u3067\u3059\";\n    }\n    \n    if (!$order-&gt;items || count($order-&gt;items) === 0) {\n        return \"\u6ce8\u6587\u306b\u5546\u54c1\u304c\u3042\u308a\u307e\u305b\u3093\";\n    }\n    \n    return true; \/\/ \u3059\u3079\u3066\u306e\u691c\u8a3c\u3092\u901a\u904e\n}\n\nfunction processOrder($order, $user, $inventory) {\n    $validation = validateOrderData($order, $user);\n    if ($validation !== true) {\n        return $validation; \/\/ \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8fd4\u3059\n    }\n    \n    \/\/ \u3053\u3053\u304b\u3089\u306f\u691c\u8a3c\u6e08\u307f\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\n    foreach ($order-&gt;items as $item) {\n        if (!$inventory-&gt;hasStock($item-&gt;id)) {\n            return \"\u5728\u5eab\u4e0d\u8db3\u3067\u3059: {$item-&gt;name}\";\n        }\n    }\n    \n    \/\/ \u5b9f\u969b\u306e\u51e6\u7406\n    return \"\u6ce8\u6587\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f\";\n}\n<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u3092\u95a2\u6570\u306b\u5206\u96e2\u3057\u3001\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u304c\u306f\u308b\u304b\u306b\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">early return\u30d1\u30bf\u30fc\u30f3\u3067\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u3059\u5b9f\u8df5\u4f8b<\/h3>\n\n\n\n<p>early return\uff08\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\uff09\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306b\u65e9\u671f\u306b\u95a2\u6570\u304b\u3089\u629c\u3051\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u3059\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002\u3053\u308c\u306f\u7279\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3084\u524d\u63d0\u6761\u4ef6\u306e\u30c1\u30a7\u30c3\u30af\u306b\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>early return\u30d1\u30bf\u30fc\u30f3\u306e\u57fa\u672c\u5f62\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function someFunction($param) {\n    \/\/ \u524d\u63d0\u6761\u4ef6\u306e\u30c1\u30a7\u30c3\u30af\n    if (!$param) {\n        return false; \/\/ \u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306f\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\n    }\n    \n    \/\/ \u30e1\u30a4\u30f3\u30ed\u30b8\u30c3\u30af\uff08\u30cd\u30b9\u30c8\u304c\u5c11\u306a\u3044\uff09\n    return doSomethingWith($param);\n}\n<\/pre>\n\n\n\n<p><strong>\u5b9f\u8df5\u4f8b\uff1a\u30e6\u30fc\u30b6\u30fc\u767b\u9332\u51e6\u7406<\/strong><\/p>\n\n\n\n<p>Before\uff08\u6df1\u3044\u30cd\u30b9\u30c8\uff09\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">function registerUser($userData) {\n    if (isset($userData['email']) &amp;&amp; filter_var($userData['email'], FILTER_VALIDATE_EMAIL)) {\n        if (isset($userData['password']) &amp;&amp; strlen($userData['password']) &gt;= 8) {\n            if (!userExists($userData['email'])) {\n                \/\/ \u30e6\u30fc\u30b6\u30fc\u3092\u767b\u9332\u3059\u308b\u30b3\u30fc\u30c9\n                $user = new User();\n                $user-&gt;email = $userData['email'];\n                $user-&gt;password = hashPassword($userData['password']);\n                $user-&gt;save();\n                \n                return [\n                    'success' =&gt; true,\n                    'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u767b\u9332\u3055\u308c\u307e\u3057\u305f'\n                ];\n            } else {\n                return [\n                    'success' =&gt; false,\n                    'message' =&gt; '\u3053\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u65e2\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059'\n                ];\n            }\n        } else {\n            return [\n                'success' =&gt; false,\n                'message' =&gt; '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f8\u6587\u5b57\u4ee5\u4e0a\u5fc5\u8981\u3067\u3059'\n            ];\n        }\n    } else {\n        return [\n            'success' =&gt; false,\n            'message' =&gt; '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044'\n        ];\n    }\n}\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-25\">\u914d\u5217\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068if\u6587\u306e\u7d44\u307f\u5408\u308f\u305b<\/h2>\n\n\n\n<p>PHP\u3067\u306f\u914d\u5217\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u983b\u7e41\u306b\u6271\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3068\u6761\u4ef6\u5206\u5c90\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u969b\u306b\u306f\u7279\u6709\u306e\u30c6\u30af\u30cb\u30c3\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u30a8\u30e9\u30fc\u306e\u5c11\u306a\u3044\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-26\">\u914d\u5217\u306e\u8981\u7d20\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3068if\u6587\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>\u914d\u5217\u306e\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u306f\u3001PHP\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u3088\u304f\u767a\u751f\u3059\u308b\u72b6\u6cc1\u3067\u3059\u3002\u8981\u7d20\u306e\u5b58\u5728\u3092\u78ba\u8a8d\u305b\u305a\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001Notice\u30ec\u30d9\u30eb\u306e\u30a8\u30e9\u30fc\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4e3b\u306a\u8981\u7d20\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n<div id=\"id-4e17e058-9d3c-4461-8660-f9577a6c3d5a\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95a2\u6570<\/th><th>\u7528\u9014<\/th><th>\u6319\u52d5<\/th><\/tr><\/thead><tbody><tr><td><code>isset()<\/code><\/td><td>\u5909\u6570\u3084\u914d\u5217\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u304b\u3064NULL\u3067\u306a\u3044\u304b\u78ba\u8a8d<\/td><td>\u5b58\u5728\u3057\u3066NULL\u4ee5\u5916\u306a\u3089true<\/td><\/tr><tr><td><code>array_key_exists()<\/code><\/td><td>\u914d\u5217\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d<\/td><td>\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308c\u3070true\uff08\u5024\u304cNULL\u3067\u3082\uff09<\/td><\/tr><tr><td><code>empty()<\/code><\/td><td>\u5909\u6570\u304c\u7a7a\uff08\u7a7a\u6587\u5b57\u30010\u3001NULL\u3001\u7a7a\u914d\u5217\u306a\u3069\uff09\u304b\u78ba\u8a8d<\/td><td>\u7a7a\u306a\u3089true<\/td><\/tr><tr><td><code>in_array()<\/code><\/td><td>\u914d\u5217\u5185\u306b\u7279\u5b9a\u306e\u5024\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d<\/td><td>\u5024\u304c\u5b58\u5728\u3059\u308c\u3070true<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><strong>isset()\u306b\u3088\u308b\u914d\u5217\u30ad\u30fc\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$userData = [\n    'name' =&gt; 'John',\n    'email' =&gt; 'john@example.com'\n    \/\/ age\u30ad\u30fc\u306f\u5b58\u5728\u3057\u306a\u3044\n];\n\n\/\/ \u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\nif (isset($userData['age'])) {\n    echo \"\u5e74\u9f62: \" . $userData['age'];\n} else {\n    echo \"\u5e74\u9f62\u60c5\u5831\u304c\u3042\u308a\u307e\u305b\u3093\";\n}\n\n\/\/ \u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u305f\u7c21\u6f54\u306a\u66f8\u304d\u65b9\n$age = isset($userData['age']) ? $userData['age'] : '\u4e0d\u660e';\necho \"\u5e74\u9f62: $age\";\n\n\/\/ PHP 7\u4ee5\u964d\u3067\u306fnull\u5408\u4f53\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3068\u3055\u3089\u306b\u7c21\u6f54\n$age = $userData['age'] ?? '\u4e0d\u660e';\necho \"\u5e74\u9f62: $age\";\n<\/pre>\n\n\n\n<p><strong>array_key_exists()\u3068isset()\u306e\u9055\u3044\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    'key1' =&gt; 'value1',\n    'key2' =&gt; null\n];\n\n\/\/ array_key_exists()\u306f\u30ad\u30fc\u306e\u5b58\u5728\u3060\u3051\u3092\u78ba\u8a8d\nif (array_key_exists('key2', $data)) {\n    echo \"key2\u306f\u5b58\u5728\u3057\u307e\u3059\uff08\u5024\u306fnull\u3067\u3082\uff09\"; \/\/ \u3053\u306e\u884c\u306f\u5b9f\u884c\u3055\u308c\u308b\n}\n\n\/\/ isset()\u306f\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3001\u5024\u304cnull\u3067\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\nif (isset($data['key2'])) {\n    echo \"key2\u306f\u5b58\u5728\u3057\u3001null\u3067\u306f\u3042\u308a\u307e\u305b\u3093\"; \/\/ \u5024\u304cnull\u306a\u306e\u3067\u3053\u306e\u884c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\n}\n<\/pre>\n\n\n\n<p><strong>in_array()\u306b\u3088\u308b\u5024\u306e\u691c\u7d22\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$allowedStatus = ['active', 'pending', 'suspended'];\n$userStatus = 'active';\n\nif (in_array($userStatus, $allowedStatus)) {\n    echo \"\u6709\u52b9\u306a\u30b9\u30c6\u30fc\u30bf\u30b9\u3067\u3059\";\n} else {\n    echo \"\u7121\u52b9\u306a\u30b9\u30c6\u30fc\u30bf\u30b9\u3067\u3059\";\n}\n\n\/\/ \u53b3\u5bc6\u306a\u578b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u5834\u5408\uff08\u63a8\u5968\uff09\n$numbers = [1, 2, '3', 4];\nif (in_array(3, $numbers, true)) {\n    echo \"\u6570\u5024\u306e3\u304c\u898b\u3064\u304b\u308a\u307e\u3057\u305f\"; \/\/ \u3053\u308c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\uff08'3'\u306f\u6587\u5b57\u5217\uff09\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u78ba\u8a8d\u3068\u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9<\/h3>\n\n\n\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u52d5\u7684\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u30a2\u30af\u30bb\u30b9\u3092\u884c\u3046\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5b58\u5728\u78ba\u8a8d\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$user = new User();\n\n\/\/ property_exists\u306b\u3088\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5b58\u5728\u78ba\u8a8d\nif (property_exists($user, 'email')) {\n    echo \"email\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u5b58\u5728\u3057\u307e\u3059\";\n}\n\n\/\/ isset()\u306b\u3088\u308b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u78ba\u8a8d\nif (isset($user-&gt;email)) {\n    echo \"email\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u5b58\u5728\u3057\u3001null\u3067\u306f\u3042\u308a\u307e\u305b\u3093\";\n}\n\n\/\/ \u30e1\u30bd\u30c3\u30c9\u306e\u5b58\u5728\u78ba\u8a8d\nif (method_exists($user, 'getFullName')) {\n    echo $user-&gt;getFullName();\n} else {\n    echo $user-&gt;firstName . ' ' . $user-&gt;lastName;\n}\n<\/pre>\n\n\n\n<p><strong>PHP 8.0\u306eNull\u5b89\u5168\u6f14\u7b97\u5b50\uff1a<\/strong><\/p>\n\n\n\n<p>PHP 8.0\u3067\u5c0e\u5165\u3055\u308c\u305fNull\u5b89\u5168\u6f14\u7b97\u5b50\uff08Nullsafe Operator\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9023\u9396\u306e\u30a2\u30af\u30bb\u30b9\u304c\u3088\u308a\u5b89\u5168\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ PHP 8.0\u4ee5\u524d\u306e\u66f8\u304d\u65b9\n$country = null;\nif ($user !== null &amp;&amp; $user-&gt;getAddress() !== null &amp;&amp; $user-&gt;getAddress()-&gt;getCountry() !== null) {\n    $country = $user-&gt;getAddress()-&gt;getCountry()-&gt;getName();\n}\n\n\/\/ PHP 8.0\u4ee5\u964d\u306eNull\u5b89\u5168\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n$country = $user?-&gt;getAddress()?-&gt;getCountry()?-&gt;getName();\n\/\/ \u3069\u3053\u304b\u3067null\u304c\u3042\u308c\u3070\u3001\u30a8\u30e9\u30fc\u3067\u306f\u306a\u304f$country\u306bnull\u304c\u8a2d\u5b9a\u3055\u308c\u308b\n<\/pre>\n\n\n\n<p><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u52d5\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\u30a2\u30af\u30bb\u30b9\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$propertyName = 'firstName';\n\n\/\/ \u52d5\u7684\u30d7\u30ed\u30d1\u30c6\u30a3\u30a2\u30af\u30bb\u30b9\nif (property_exists($user, $propertyName)) {\n    echo $user-&gt;$propertyName;\n}\n\n\/\/ \u53ef\u5909\u5909\u6570\u69cb\u6587\u3092\u4f7f\u3063\u305f\u52d5\u7684\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\n$methodName = 'getFullName';\nif (method_exists($user, $methodName)) {\n    echo $user-&gt;$methodName();\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\u306e\u52b9\u7387\u5316<\/h3>\n\n\n\n<p>\u591a\u304f\u306e\u6761\u4ef6\u5206\u5c90\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001if-elseif\u306e\u9023\u9396\u3084switch\u6587\u306e\u4ee3\u308f\u308a\u306b\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3046\u3068\u30b3\u30fc\u30c9\u304c\u30af\u30ea\u30fc\u30f3\u306b\u306a\u308a\u3001\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u5206\u5c90\uff08\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\uff09\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u591a\u304f\u306eif-elseif\u6587\u3092\u4f7f\u3046\u5834\u5408\nfunction getStatusLabel($statusCode) {\n    if ($statusCode === 'A') {\n        return '\u30a2\u30af\u30c6\u30a3\u30d6';\n    } elseif ($statusCode === 'P') {\n        return '\u4fdd\u7559\u4e2d';\n    } elseif ($statusCode === 'S') {\n        return '\u505c\u6b62';\n    } elseif ($statusCode === 'D') {\n        return '\u524a\u9664\u6e08\u307f';\n    } else {\n        return '\u4e0d\u660e';\n    }\n}\n\n\/\/ \u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u65b9\u6cd5\nfunction getStatusLabel($statusCode) {\n    $statusLabels = [\n        'A' =&gt; '\u30a2\u30af\u30c6\u30a3\u30d6',\n        'P' =&gt; '\u4fdd\u7559\u4e2d',\n        'S' =&gt; '\u505c\u6b62',\n        'D' =&gt; '\u524a\u9664\u6e08\u307f'\n    ];\n    \n    return $statusLabels[$statusCode] ?? '\u4e0d\u660e';\n}\n<\/pre>\n\n\n\n<p><strong>\u6761\u4ef6\u306b\u57fa\u3065\u3044\u305f\u51e6\u7406\u306e\u5b9f\u884c\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ if-elseif\u306e\u9023\u9396\nfunction executeAction($action, $data) {\n    if ($action === 'create') {\n        return createRecord($data);\n    } elseif ($action === 'update') {\n        return updateRecord($data);\n    } elseif ($action === 'delete') {\n        return deleteRecord($data);\n    } else {\n        throw new InvalidArgumentException(\"\u4e0d\u660e\u306a\u30a2\u30af\u30b7\u30e7\u30f3: $action\");\n    }\n}\n\n\/\/ \u9023\u60f3\u914d\u5217\u3068\u7121\u540d\u95a2\u6570\u3092\u4f7f\u3063\u305f\u65b9\u6cd5\nfunction executeAction($action, $data) {\n    $actions = [\n        'create' =&gt; function($data) { return createRecord($data); },\n        'update' =&gt; function($data) { return updateRecord($data); },\n        'delete' =&gt; function($data) { return deleteRecord($data); }\n    ];\n    \n    if (!isset($actions[$action])) {\n        throw new InvalidArgumentException(\"\u4e0d\u660e\u306a\u30a2\u30af\u30b7\u30e7\u30f3: $action\");\n    }\n    \n    return $actions[$action]($data);\n}\n<\/pre>\n\n\n\n<p><strong>\u6a29\u9650\u30c1\u30a7\u30c3\u30af\u306e\u6700\u9069\u5316\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30cd\u30b9\u30c8\u3055\u308c\u305fif\u6587\u3092\u4f7f\u3046\u5834\u5408\nfunction checkAccess($user, $resource) {\n    if ($user-&gt;role === 'admin') {\n        return true;\n    } elseif ($user-&gt;role === 'editor') {\n        if ($resource-&gt;type === 'article' || $resource-&gt;type === 'page') {\n            return true;\n        }\n        return false;\n    } elseif ($user-&gt;role === 'author') {\n        if ($resource-&gt;type === 'article' &amp;&amp; $resource-&gt;ownerId === $user-&gt;id) {\n            return true;\n        }\n        return false;\n    }\n    return false;\n}\n\n\/\/ \u9023\u60f3\u914d\u5217\u3092\u4f7f\u3063\u305f\u6a29\u9650\u30de\u30c3\u30d7\nfunction checkAccess($user, $resource) {\n    $accessMap = [\n        'admin' =&gt; true, \/\/ \u7ba1\u7406\u8005\u306f\u3059\u3079\u3066\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n        'editor' =&gt; function($resource) {\n            return in_array($resource-&gt;type, ['article', 'page']);\n        },\n        'author' =&gt; function($resource, $user) {\n            return $resource-&gt;type === 'article' &amp;&amp; $resource-&gt;ownerId === $user-&gt;id;\n        }\n    ];\n    \n    if (!isset($accessMap[$user-&gt;role])) {\n        return false;\n    }\n    \n    \/\/ \u95a2\u6570\u306e\u5834\u5408\u306f\u5b9f\u884c\u3001\u771f\u507d\u5024\u306a\u3089\u305d\u306e\u307e\u307e\u8fd4\u3059\n    return is_callable($accessMap[$user-&gt;role]) \n           ? $accessMap[$user-&gt;role]($resource, $user) \n           : $accessMap[$user-&gt;role];\n}\n<\/pre>\n\n\n\n<p>\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u6761\u4ef6\u5206\u5c90\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u7e70\u308a\u8fd4\u3057\u306e\u591a\u3044\u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u3084\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u3067\u306f\u3001\u9023\u60f3\u914d\u5217\u3084\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u8907\u96d1\u3055\u3092\u5927\u5e45\u306b\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-29\">PHP\u306eswitch\u6587\u3068\u306e\u4f7f\u3044\u5206\u3051<\/h2>\n\n\n\n<p>PHP\u3067\u306f\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306bif\u6587\u3068switch\u6587\u3068\u3044\u30462\u3064\u306e\u4e3b\u8981\u306a\u69cb\u6587\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u3082\u7279\u5b9a\u306e\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u30b3\u30fc\u30c9\u3092\u5206\u5c90\u3055\u305b\u308b\u76ee\u7684\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u306b\u7279\u5fb4\u3068\u6700\u9069\u306a\u4f7f\u7528\u30b7\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">if\u6587\u3068switch\u6587\u306e\u7279\u5fb4\u3068\u9055\u3044<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u4e21\u8005\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u7279\u5fb4\u3092\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>if-elseif-else\u69cb\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if (\u6761\u4ef61) {\n    \/\/ \u6761\u4ef61\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n} elseif (\u6761\u4ef62) {\n    \/\/ \u6761\u4ef62\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n} elseif (\u6761\u4ef63) {\n    \/\/ \u6761\u4ef63\u304c\u771f\u306e\u5834\u5408\u306e\u51e6\u7406\n} else {\n    \/\/ \u3069\u306e\u6761\u4ef6\u3082\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p><strong>switch\u69cb\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">switch (\u5f0f) {\n    case \u50241:\n        \/\/ \u5f0f == \u50241\u306e\u5834\u5408\u306e\u51e6\u7406\n        break;\n    case \u50242:\n        \/\/ \u5f0f == \u50242\u306e\u5834\u5408\u306e\u51e6\u7406\n        break;\n    case \u50243:\n        \/\/ \u5f0f == \u50243\u306e\u5834\u5408\u306e\u51e6\u7406\n        break;\n    default:\n        \/\/ \u3069\u306e\u5024\u306b\u3082\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n}\n<\/pre>\n\n\n\n<p><strong>\u4e3b\u306a\u9055\u3044\uff1a<\/strong><\/p>\n\n\n<div id=\"id-91321467-f677-40cd-8799-e5c967ac47fd\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>if-elseif-else<\/th><th>switch<\/th><\/tr><\/thead><tbody><tr><td>\u6bd4\u8f03\u65b9\u6cd5<\/td><td>\u3042\u3089\u3086\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\u304c\u4f7f\u7528\u53ef\u80fd<\/td><td>\u7b49\u4fa1\u6bd4\u8f03\uff08==\uff09\u306e\u307f<\/td><\/tr><tr><td>\u8907\u6570\u6761\u4ef6\u306e\u53d6\u308a\u6271\u3044<\/td><td>\u7570\u306a\u308b\u5909\u6570\u3084\u5f0f\u306e\u6bd4\u8f03\u304c\u53ef\u80fd<\/td><td>\u5358\u4e00\u306e\u5f0f\u3068\u8907\u6570\u306e\u5024\u306e\u6bd4\u8f03\u306b\u9650\u5b9a<\/td><\/tr><tr><td>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc<\/td><td>\u306a\u3057<\/td><td>\u5b58\u5728\u3059\u308b\uff08break\u304c\u5fc5\u8981\uff09<\/td><\/tr><tr><td>\u8907\u96d1\u306a\u6761\u4ef6<\/td><td>\u8ad6\u7406\u6f14\u7b97\u5b50\u3067\u8907\u5408\u6761\u4ef6\u3092\u8868\u73fe\u53ef\u80fd<\/td><td>\u96e3\u3057\u3044\uff08\u8907\u5408\u6761\u4ef6\u306b\u306f\u4e0d\u5411\u304d\uff09<\/td><\/tr><tr><td>\u53ef\u8aad\u6027<\/td><td>\u6761\u4ef6\u304c\u591a\u3044\u5834\u5408\u306b\u4f4e\u4e0b<\/td><td>\u591a\u304f\u306e\u7b49\u4fa1\u6bd4\u8f03\u3067\u512a\u308c\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><strong>\u6bd4\u8f03\u65b9\u6cd5\u306e\u9055\u3044\uff1a<\/strong><\/p>\n\n\n\n<p>if\u6587\u306f\u3042\u3089\u3086\u308b\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08==, ===, !=, !==, &lt;, &gt;, &lt;=, &gt;=\uff09\u3084\u8ad6\u7406\u6f14\u7b97\u5b50\uff08&amp;&amp;, ||, !\uff09\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001switch\u6587\u306f\u57fa\u672c\u7684\u306b\u7b49\u4fa1\u6bd4\u8f03\uff08==\uff09\u306e\u307f\u3092\u884c\u3044\u307e\u3059\u3002\u3064\u307e\u308aswitch\u6587\u306f\u5024\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a\u3057\u304b\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ if\u6587\u3067\u306f\u69d8\u3005\u306a\u6bd4\u8f03\u304c\u53ef\u80fd\nif ($age &gt; 18 &amp;&amp; $hasId) {\n    \/\/ 18\u6b73\u3088\u308a\u5927\u304d\u304f\u3001\u304b\u3064ID\u3092\u6301\u3063\u3066\u3044\u308b\u5834\u5408\n}\n\n\/\/ switch\u6587\u306f\u5358\u4e00\u306e\u5024\u3068\u306e\u7b49\u4fa1\u6bd4\u8f03\u3057\u304b\u3067\u304d\u306a\u3044\nswitch ($userRole) {\n    case 'admin':\n        \/\/ $userRole\u304c'admin'\u3068\u7b49\u3057\u3044\u5834\u5408\n        break;\n}\n<\/pre>\n\n\n\n<p><strong>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u306e\u9055\u3044\uff1a<\/strong><\/p>\n\n\n\n<p>switch\u6587\u306e\u7279\u5fb4\u7684\u306a\u52d5\u4f5c\u3068\u3057\u3066\u300c\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306fbreak\u6587\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u6b21\u306ecase\u7bc0\u306e\u51e6\u7406\u3082\u7d9a\u3051\u3066\u5b9f\u884c\u3055\u308c\u308b\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$fruit = 'apple';\n\nswitch ($fruit) {\n    case 'apple':\n        echo \"\u3053\u308c\u306f\u30ea\u30f3\u30b4\u3067\u3059\u3002\";\n        \/\/ break\u304c\u306a\u3044\u305f\u3081\u6b21\u306ecase\u3082\u5b9f\u884c\u3055\u308c\u308b\n    case 'orange':\n        echo \"\u67d1\u6a58\u7cfb\u306e\u679c\u7269\u3067\u3059\u3002\";\n        break;\n    case 'banana':\n        echo \"\u3053\u308c\u306f\u30d0\u30ca\u30ca\u3067\u3059\u3002\";\n        break;\n}\n\/\/ \u51fa\u529b: \"\u3053\u308c\u306f\u30ea\u30f3\u30b4\u3067\u3059\u3002\u67d1\u6a58\u7cfb\u306e\u679c\u7269\u3067\u3059\u3002\"\n<\/pre>\n\n\n\n<p>\u3053\u306e\u6a5f\u80fd\u306f\u610f\u56f3\u7684\u306b\u4f7f\u3046\u3068\u4fbf\u5229\u3067\u3059\u304c\u3001\u3046\u3063\u304b\u308abreak\u6587\u3092\u5fd8\u308c\u308b\u3068\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u3069\u306e\u3088\u3046\u306a\u5834\u5408\u306bswitch\u6587\u3092\u9078\u3076\u3079\u304d\u304b<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001switch\u6587\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3059\u3079\u304d\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5358\u4e00\u306e\u5909\u6570\u3084\u5f0f\u3092\u8907\u6570\u306e\u5024\u3068\u6bd4\u8f03\u3059\u308b\u5834\u5408<\/strong> <code>\/\/ \u826f\u3044switch\u6587\u306e\u4f7f\u7528\u4f8b switch ($paymentMethod) { case 'credit_card': processCreditCard(); break; case 'paypal': processPaypal(); break; case 'bank_transfer': processBankTransfer(); break; default: showError('\u672a\u5bfe\u5fdc\u306e\u652f\u6255\u3044\u65b9\u6cd5\u3067\u3059'); }<\/code><\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\uff08\u591a\u6570\u306e\u5206\u5c90\uff09<\/strong> 10\u500b\u4ee5\u4e0a\u306e\u5206\u5c90\u304c\u3042\u308b\u5834\u5408\u3001if-elseif\u306e\u9023\u9396\u3088\u308a\u3082switch\u6587\u306e\u65b9\u304c\u8996\u899a\u7684\u306b\u6574\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u6d3b\u7528\u3057\u305f\u3044\u5834\u5408<\/strong> \u8907\u6570\u306e\u30b1\u30fc\u30b9\u3067\u540c\u3058\u51e6\u7406\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u3001\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u304c\u4fbf\u5229\u3067\u3059\u3002 <code>switch ($day) { case 'Monday': case 'Tuesday': case 'Wednesday': case 'Thursday': case 'Friday': echo \"\u5e73\u65e5\u3067\u3059\"; break; case 'Saturday': case 'Sunday': echo \"\u9031\u672b\u3067\u3059\"; break; }<\/code><\/li>\n\n\n\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\uff08\u5927\u91cf\u306e\u7b49\u4fa1\u6bd4\u8f03\uff09<\/strong> \u7406\u8ad6\u7684\u306b\u306f\u3001\u591a\u6570\u306e\u7b49\u4fa1\u6bd4\u8f03\u306b\u304a\u3044\u3066switch\u6587\u306e\u65b9\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u826f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\uff08\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u306b\u3088\u308b\uff09\u3002\u305f\u3060\u3057\u3001PHP\u306e\u5834\u5408\u3001\u5b9f\u969b\u306e\u9055\u3044\u306f\u308f\u305a\u304b\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4e00\u65b9\u3001\u4ee5\u4e0b\u306e\u5834\u5408\u306fif\u6587\u3092\u9078\u3076\u3079\u304d\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7570\u306a\u308b\u5909\u6570\u3084\u8907\u96d1\u306a\u6761\u4ef6\u306e\u6bd4\u8f03<\/strong><\/li>\n\n\n\n<li><strong>\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3084\u4e0d\u7b49\u5f0f\u306e\u4f7f\u7528\uff08&lt;, &gt;, &lt;=, &gt;=\uff09<\/strong><\/li>\n\n\n\n<li><strong>\u53b3\u5bc6\u306a\u578b\u6bd4\u8f03\uff08===\uff09\u304c\u5fc5\u8981\u306a\u5834\u5408<\/strong><\/li>\n\n\n\n<li><strong>\u52d5\u7684\u306a\u6761\u4ef6\u8a55\u4fa1\u304c\u5fc5\u8981\u306a\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">switch\u6587\u304b\u3089if\u6587\u3078\u306e\u66f8\u304d\u63db\u3048\u4f8b<\/h3>\n\n\n\n<p>\u3069\u306e\u3088\u3046\u306b\u4e21\u8005\u3092\u5909\u63db\u3067\u304d\u308b\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306aswitch\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">switch ($userType) {\n    case 'admin':\n        $accessLevel = 'full';\n        break;\n    case 'editor':\n        $accessLevel = 'write';\n        break;\n    case 'subscriber':\n        $accessLevel = 'read';\n        break;\n    default:\n        $accessLevel = 'none';\n}\n<\/pre>\n\n\n\n<p><strong>if\u6587\u3078\u306e\u66f8\u304d\u63db\u3048\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if ($userType === 'admin') {\n    $accessLevel = 'full';\n} elseif ($userType === 'editor') {\n    $accessLevel = 'write';\n} elseif ($userType === 'subscriber') {\n    $accessLevel = 'read';\n} else {\n    $accessLevel = 'none';\n}\n<\/pre>\n\n\n\n<p><strong>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u542b\u3080switch\u6587\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">switch ($day) {\n    case 'Monday':\n    case 'Tuesday':\n    case 'Wednesday':\n    case 'Thursday':\n    case 'Friday':\n        $type = 'weekday';\n        break;\n    case 'Saturday':\n    case 'Sunday':\n        $type = 'weekend';\n        break;\n    default:\n        $type = 'unknown';\n}\n<\/pre>\n\n\n\n<p><strong>if\u6587\u3078\u306e\u66f8\u304d\u63db\u3048\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">if (in_array($day, ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'])) {\n    $type = 'weekday';\n} elseif (in_array($day, ['Saturday', 'Sunday'])) {\n    $type = 'weekend';\n} else {\n    $type = 'unknown';\n}\n<\/pre>\n\n\n\n<p><strong>\u3088\u308a\u52b9\u7387\u7684\u306a\u4ee3\u66ff\u6848\uff08\u9023\u60f3\u914d\u5217\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u591a\u6570\u306e\u7b49\u4fa1\u6bd4\u8f03\u3092\u884c\u3046\u5834\u5408\u3001switch\u6587\u3084if-elseif\u3088\u308a\u3082\u9023\u60f3\u914d\u5217\u3092\u4f7f\u3046\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u52b9\u7387\u7684\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u9023\u60f3\u914d\u5217\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5\n$accessLevels = [\n    'admin' =&gt; 'full',\n    'editor' =&gt; 'write',\n    'subscriber' =&gt; 'read'\n];\n\n$accessLevel = $accessLevels[$userType] ?? 'none';\n<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u30b3\u30fc\u30c9\u304c\u7c21\u6f54\u306b\u306a\u308a\u3001\u591a\u6570\u306e\u6761\u4ef6\u3067\u3082\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u5b9f\u7528\u7684\u306a\u5224\u65ad\u57fa\u6e96\uff1a<\/strong><\/p>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u57fa\u6e96\u3067\u9078\u629e\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u5909\u6570\u3092\u591a\u304f\u306e\u56fa\u5b9a\u5024\u3068\u6bd4\u8f03\u3059\u308b\u5834\u5408 \u2192 <strong>switch\u6587<\/strong><\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 <strong>switch\u6587<\/strong><\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u3084\u7570\u306a\u308b\u5909\u6570\u306e\u6bd4\u8f03\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 <strong>if\u6587<\/strong><\/li>\n\n\n\n<li>\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3084\u4e0d\u7b49\u5f0f\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 <strong>if\u6587<\/strong><\/li>\n\n\n\n<li>\u591a\u6570\u306e\u7b49\u4fa1\u6bd4\u8f03\u3067\u30d1\u30bf\u30fc\u30f3\u304c\u660e\u78ba\u306a\u5834\u5408 \u2192 <strong>\u9023\u60f3\u914d\u5217<\/strong><\/li>\n<\/ol>\n\n\n\n<p>\u6700\u7d42\u7684\u306b\u306f\u3001\u30c1\u30fc\u30e0\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u3084\u500b\u4eba\u306e\u597d\u307f\u3082\u5224\u65ad\u6750\u6599\u306b\u306a\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u3092\u9078\u3093\u3067\u3082\u6a5f\u80fd\u7684\u306b\u306f\u540c\u7b49\u306e\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u304c\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u512a\u5148\u3057\u3066\u9078\u629e\u3059\u308b\u306e\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-33\">\u6761\u4ef6\u5206\u5c90\u306b\u95a2\u3059\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30ed\u30b8\u30c3\u30af\u3092\u5236\u5fa1\u3059\u308b\u91cd\u8981\u306a\u90e8\u5206\u3067\u3059\u304c\u3001\u540c\u6642\u306b\u5fae\u5999\u306a\u30d0\u30b0\u3092\u5f15\u304d\u8d77\u3053\u3057\u3084\u3059\u3044\u9818\u57df\u3067\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001PHP\u306e\u6761\u4ef6\u5206\u5c90\u3067\u767a\u751f\u3057\u304c\u3061\u306a\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-34\">=\u3068==\u306e\u6df7\u540c\u306b\u3088\u308b\u30d0\u30b0\u3068\u9632\u6b62\u7b56<\/h3>\n\n\n\n<p>PHP\u3067\u306f\u4ee3\u5165\u6f14\u7b97\u5b50\uff08=\uff09\u3068\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u306e\u6df7\u540c\u304c\u975e\u5e38\u306b\u591a\u304f\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u306e\u4e00\u3064\u3067\u3059\u3002\u69cb\u6587\u7684\u306b\u4e21\u65b9\u304c\u6709\u52b9\u3067\u3042\u308b\u305f\u3081\u3001\u30a8\u30e9\u30fc\u3068\u3057\u3066\u691c\u51fa\u3055\u308c\u306b\u304f\u3044\u3053\u3068\u304c\u554f\u984c\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4ee3\u5165\u6f14\u7b97\u5b50\uff08=\uff09<\/strong>\uff1a\u5909\u6570\u306b\u5024\u3092\u4ee3\u5165\u3057\u307e\u3059\u3002 <strong>\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09<\/strong>\uff1a2\u3064\u306e\u5024\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u8aa4\u3063\u305f\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u610f\u56f3\uff1a$userRole\u304c'admin'\u3068\u7b49\u3057\u3044\u304b\u78ba\u8a8d\u3057\u305f\u3044\nif ($userRole = 'admin') {  \/\/ \u8aa4\u308a: \u4ee3\u5165\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n    grantAdminAccess();     \/\/ \u5e38\u306b\u5b9f\u884c\u3055\u308c\u308b\uff01\n}\n<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001$userRole\u306b\u2019admin\u2019\u3092\u4ee3\u5165\u3057\u3001\u305d\u306e\u4ee3\u5165\u7d50\u679c\uff08\u6587\u5b57\u5217\u2019admin\u2019\uff09\u304c\u6761\u4ef6\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002PHP\u3067\u306f\u975e\u7a7a\u6587\u5b57\u5217\u306f\u771f\u3068\u8a55\u4fa1\u3055\u308c\u308b\u305f\u3081\u3001\u6761\u4ef6\u306f\u5e38\u306b\u771f\u306b\u306a\u308a\u3001grantAdminAccess()\u304c\u610f\u56f3\u306b\u53cd\u3057\u3066\u5e38\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6b63\u3057\u3044\u4f7f\u7528\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6b63\u3057\u3044\u6bd4\u8f03\nif ($userRole == 'admin') {  \/\/ \u7b49\u4fa1\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\n    grantAdminAccess();      \/\/ $userRole\u304c'admin'\u306e\u5834\u5408\u306e\u307f\u5b9f\u884c\n}\n<\/pre>\n\n\n\n<p><strong>\u9632\u6b62\u7b56\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Yoda\u6761\u4ef6\u5f0f\uff08\u9006\u6761\u4ef6\u5f0f\uff09\u3092\u4f7f\u7528\u3059\u308b<\/strong> <code>\/\/ \u5b9a\u6570\u3084\u5024\u3092\u5de6\u5074\u306b\u914d\u7f6e\u3059\u308b\u30b9\u30bf\u30a4\u30eb if ('admin' == $userRole) { \/\/ \u4eee\u306b=\u3092\u4f7f\u3046\u3068'admin' = $userRole\u3068\u306a\u308a\u30a8\u30e9\u30fc\u306b\u306a\u308b grantAdminAccess(); }<\/code><\/li>\n\n\n\n<li><strong>\u53b3\u5bc6\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===\uff09\u3092\u512a\u5148\u7684\u306b\u4f7f\u7528\u3059\u308b<\/strong> <code>\/\/ \u7b49\u4fa1\u6f14\u7b97\u5b50\uff08==\uff09\u3067\u306f\u306a\u304f\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\uff08===\uff09\u3092\u4f7f\u7528 if ($userRole === 'admin') { grantAdminAccess(); }<\/code><\/li>\n\n\n\n<li><strong>\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u3084IDE\u306e\u8b66\u544a\u3092\u6d3b\u7528\u3059\u308b<\/strong> PHPStorm\u306a\u3069\u306e\u9ad8\u5ea6\u306aIDE\u3084PHP_CodeSniffer\u306a\u3069\u306e\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u306f\u3001\u6761\u4ef6\u5f0f\u5185\u3067\u306e\u4ee3\u5165\u6f14\u7b97\u5b50\u306e\u4f7f\u7528\u306b\u5bfe\u3057\u3066\u8b66\u544a\u3092\u51fa\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-35\">\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u9806\u5e8f\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u6761\u4ef6\u5f0f\u3067\u306f\u3001\u8a55\u4fa1\u3055\u308c\u308b\u9806\u5e8f\u304c\u7d50\u679c\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u8907\u6570\u306e\u6761\u4ef6\u3084\u95a2\u6570\u547c\u3073\u51fa\u3057\u3092\u542b\u3080\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u610f\u56f3\u3057\u306a\u3044\u8a55\u4fa1\u9806\u5e8f\u306e\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u305d\u306e\u5f8c\u30e6\u30fc\u30b6\u30fc\u306e\u6a29\u9650\u3092\u78ba\u8a8d\u3057\u305f\u3044\nif ($user-&gt;isActive() &amp;&amp; $user-&gt;hasPermission('edit')) {\n    allowEditing();\n}\n\n\/\/ \u3082\u3057$user\u304cnull\u306a\u3089\uff1f\nif ($user-&gt;isActive() &amp;&amp; $user-&gt;hasPermission('edit')) {\n    \/\/ $user\u304cnull\u306e\u5834\u5408\u3001$user-&gt;isActive()\u3067\u65e2\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\n}\n<\/pre>\n\n\n\n<p><strong>\u5b89\u5168\u306a\u8a55\u4fa1\u9806\u5e8f\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ null\u30c1\u30a7\u30c3\u30af\u3092\u5148\u306b\u884c\u3046\nif ($user !== null &amp;&amp; $user-&gt;isActive() &amp;&amp; $user-&gt;hasPermission('edit')) {\n    allowEditing();\n}\n<\/pre>\n\n\n\n<p><strong>\u5206\u5272\u3057\u3066\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3092\u5909\u6570\u306b\u5206\u5272\u3057\u3066\u53ef\u8aad\u6027\u3092\u5411\u4e0a\n$userExists = $user !== null;\n$isActiveUser = $userExists &amp;&amp; $user-&gt;isActive();\n$hasEditPermission = $isActiveUser &amp;&amp; $user-&gt;hasPermission('edit');\n\nif ($hasEditPermission) {\n    allowEditing();\n}\n<\/pre>\n\n\n\n<p><strong>\u77ed\u7d61\u8a55\u4fa1\u306b\u4f9d\u5b58\u3057\u305f\u30b3\u30fc\u30c9\uff1a<\/strong><\/p>\n\n\n\n<p>PHP\u306e\u8ad6\u7406\u6f14\u7b97\u5b50\u306f\u77ed\u7d61\u8a55\u4fa1\uff08\u30b7\u30e7\u30fc\u30c8\u30b5\u30fc\u30ad\u30c3\u30c8\u8a55\u4fa1\uff09\u3092\u884c\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u3001AND\uff08&amp;&amp;\uff09\u306e\u5de6\u5074\u304cfalse\u306a\u3089\u53f3\u5074\u306f\u8a55\u4fa1\u3055\u308c\u305a\u3001OR\uff08||\uff09\u306e\u5de6\u5074\u304ctrue\u306a\u3089\u53f3\u5074\u306f\u8a55\u4fa1\u3055\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u6ce8\u610f\u3082\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u77ed\u7d61\u8a55\u4fa1\u3092\u5229\u7528\u3057\u305f\u66f8\u304d\u65b9\n$user &amp;&amp; $user-&gt;activate();  \/\/ $user\u304ctrue\u306e\u5834\u5408\u306e\u307factivate()\u3092\u5b9f\u884c\n\n\/\/ \u3057\u304b\u3057\u3001\u53ef\u8aad\u6027\u306e\u305f\u3081\u306b\u306f\u660e\u793a\u7684\u306aif\u6587\u304c\u671b\u307e\u3057\u3044\nif ($user) {\n    $user-&gt;activate();\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-36\">\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u3092\u610f\u8b58\u3057\u305f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/h3>\n\n\n\n<p>PHP\u306b\u304a\u3051\u308b\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff08\u9ad8\u3044\u9806\uff09\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>! \uff08NOT\uff09<\/li>\n\n\n\n<li>&amp;&amp; \uff08AND\uff09<\/li>\n\n\n\n<li>|| \uff08OR\uff09<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u306e\u512a\u5148\u9806\u4f4d\u3092\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u610f\u56f3\u3057\u306a\u3044\u7d50\u679c\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u610f\u56f3\u3057\u306a\u3044\u8a55\u4fa1\u306e\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u610f\u56f3\uff1a(isAdmin\u307e\u305f\u306fisEditor)\u3067\u304b\u3064isActive\n\/\/ \u5b9f\u969b\u306e\u8a55\u4fa1\uff1aisAdmin \u307e\u305f\u306f (isEditor\u3067\u304b\u3064isActive)\nif ($user-&gt;isAdmin() || $user-&gt;isEditor() &amp;&amp; $user-&gt;isActive()) {\n    allowAccess();\n}\n<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001&amp;&amp;\u6f14\u7b97\u5b50\u306e\u512a\u5148\u9806\u4f4d\u304c||\u3088\u308a\u9ad8\u3044\u305f\u3081\u3001\u610f\u56f3\u3057\u305f\u3082\u306e\u3068\u306f\u7570\u306a\u308b\u8a55\u4fa1\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u610f\u56f3\u3092\u660e\u78ba\u306b\u3057\u305f\u66f8\u304d\u65b9\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u62ec\u5f27\u3092\u4f7f\u3063\u3066\u610f\u56f3\u3092\u660e\u78ba\u306b\nif (($user-&gt;isAdmin() || $user-&gt;isEditor()) &amp;&amp; $user-&gt;isActive()) {\n    allowAccess();\n}\n<\/pre>\n\n\n\n<p><strong>\u8907\u96d1\u306a\u6761\u4ef6\u306f\u5206\u5272\u3059\u308b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u53ef\u8aad\u6027\u304c\u9ad8\u3044\u66f8\u304d\u65b9\n$isPrivilegedUser = $user-&gt;isAdmin() || $user-&gt;isEditor();\n$canAccess = $isPrivilegedUser &amp;&amp; $user-&gt;isActive();\n\nif ($canAccess) {\n    allowAccess();\n}\n<\/pre>\n\n\n\n<p><strong>\u8ad6\u7406\u6f14\u7b97\u5b50\u306e\u9055\u3044\u306b\u6ce8\u610f\uff1a<\/strong><\/p>\n\n\n\n<p>PHP\u306b\u306f2\u7a2e\u985e\u306e\u8ad6\u7406AND\/OR\u6f14\u7b97\u5b50\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>&amp;&amp;<\/code> \u3068 <code>||<\/code> \uff08\u512a\u5148\u9806\u4f4d\u304c\u9ad8\u3044\uff09<\/li>\n\n\n\n<li><code>and<\/code> \u3068 <code>or<\/code> \uff08\u512a\u5148\u9806\u4f4d\u304c\u4f4e\u3044\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u3092\u6df7\u5728\u3055\u305b\u308b\u3068\u601d\u308f\u306c\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\n$access = $user-&gt;isAdmin() or die('\u30a2\u30af\u30bb\u30b9\u62d2\u5426');\n\/\/ $access\u306b\u306f$user-&gt;isAdmin()\u306e\u7d50\u679c\u304c\u4ee3\u5165\u3055\u308c\u3001\u305d\u306e\u5f8cor\u304c\u8a55\u4fa1\u3055\u308c\u308b\n\n\/\/ \u610f\u56f3\u3057\u305f\u52d5\u4f5c\n$access = $user-&gt;isAdmin() || die('\u30a2\u30af\u30bb\u30b9\u62d2\u5426');\n\/\/ ||\u306e\u512a\u5148\u9806\u4f4d\u304c=\u3088\u308a\u9ad8\u3044\u305f\u3081\u3001\u6761\u4ef6\u304c\u5148\u306b\u8a55\u4fa1\u3055\u308c\u308b\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-37\">\u6761\u4ef6\u5206\u5c90\u306b\u304a\u3051\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u306b\u95a2\u9023\u3059\u308b\u30a8\u30e9\u30fc\u3092\u9632\u3050\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53b3\u5bc6\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08===, !==\uff09\u3092\u512a\u5148\u7684\u306b\u4f7f\u7528\u3059\u308b<\/strong> <code>\/\/ \u578b\u3082\u542b\u3081\u305f\u53b3\u5bc6\u306a\u6bd4\u8f03 if ($value === true) { ... } if ($count !== 0) { ... }<\/code><\/li>\n\n\n\n<li><strong>\u8907\u96d1\u306a\u6761\u4ef6\u306f\u5c0f\u3055\u304f\u5206\u5272\u3059\u308b<\/strong> <code>\/\/ \u5206\u304b\u308a\u3084\u3059\u304f\u3001\u304b\u3064\u30d0\u30b0\u3082\u898b\u3064\u3051\u3084\u3059\u3044 $isAdult = $age &gt;= 18; $hasConsent = $parentalConsent === true; $canProceed = $isAdult || $hasConsent; if ($canProceed) { ... }<\/code><\/li>\n\n\n\n<li><strong>\u62ec\u5f27\u3092\u4f7f\u3063\u3066\u8a55\u4fa1\u9806\u5e8f\u3092\u660e\u793a\u3059\u308b<\/strong> <code>if ((A || B) &amp;&amp; (C || D)) { ... }<\/code><\/li>\n\n\n\n<li><strong>\u6761\u4ef6\u5f0f\u3067false\/true\/null\u3068\u6bd4\u8f03\u3059\u308b\u3068\u304d\u306f\u5197\u9577\u306a\u66f8\u304d\u65b9\u3092\u907f\u3051\u308b<\/strong> <code>\/\/ \u5197\u9577 if ($isAdmin === true) { ... } if ($value === false) { ... } \/\/ \u7c21\u6f54 if ($isAdmin) { ... } if (!$value) { ... }<\/code><\/li>\n\n\n\n<li><strong>\u5426\u5b9a\u306e\u91cd\u8907\u3092\u907f\u3051\u308b<\/strong> <code>\/\/ \u907f\u3051\u308b\u3079\u304d\u66f8\u304d\u65b9 if (!$isNotValid) { ... } \/\/ \u3088\u308a\u660e\u78ba\u306a\u66f8\u304d\u65b9 if ($isValid) { ... }<\/code><\/li>\n\n\n\n<li><strong>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3068\u9759\u7684\u89e3\u6790\u3092\u5fb9\u5e95\u3059\u308b<\/strong> PHPStan\u3084Psalm\u306a\u3069\u306e\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u306f\u3001\u591a\u304f\u306e\u6761\u4ef6\u5206\u5c90\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u3092\u4e8b\u524d\u306b\u691c\u51fa\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3067\u5883\u754c\u6761\u4ef6\u3092\u78ba\u8a8d\u3059\u308b<\/strong> \u6761\u4ef6\u5206\u5c90\u306f\u7279\u306b\u5883\u754c\u5024\uff08\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\uff09\u3067\u30d0\u30b0\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u3057\u3063\u304b\u308a\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u6761\u4ef6\u5206\u5c90\u306b\u95a2\u3059\u308b\u30a8\u30e9\u30fc\u306f\u6c17\u3065\u304d\u306b\u304f\u3044\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u304c\u3001\u30b3\u30fc\u30c9\u306e\u69cb\u9020\u3084\u547d\u540d\u898f\u5247\u3092\u6574\u3048\u3001\u7a4d\u6975\u7684\u306b\u9759\u7684\u89e3\u6790\u30c4\u30fc\u30eb\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u591a\u304f\u306e\u554f\u984c\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30c1\u30fc\u30e0\u3067\u306e\u958b\u767a\u3067\u306f\u3001\u6761\u4ef6\u5206\u5c90\u306e\u66f8\u304d\u65b9\u306b\u95a2\u3059\u308b\u5171\u901a\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u8a2d\u3051\u308b\u3053\u3068\u3082\u52b9\u679c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-38\">\u5b9f\u8df5\u7684\u306aif\u6587\u6d3b\u7528\u4f8b\u3068\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u5b66\u3093\u3060if\u6587\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u3001\u5b9f\u969b\u306eWeb\u958b\u767a\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u72b6\u6cc1\u306b\u5fdc\u7528\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3001\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30c1\u30a7\u30c3\u30af\u3001\u6761\u4ef6\u4ed8\u304dHTML\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3068\u3044\u30463\u3064\u306e\u4e00\u822c\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u3001if\u6587\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u30d5\u30a9\u30fc\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067\u306eif\u6587\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u5165\u529b\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\uff08\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff09\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002if\u6587\u3092\u4f7f\u3063\u3066\u52b9\u679c\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u30d5\u30a9\u30fc\u30e0\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ POST\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u3068\u57fa\u672c\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\nif ($_SERVER['REQUEST_METHOD'] === 'POST') {\n    $name = $_POST['name'] ?? '';\n    $email = $_POST['email'] ?? '';\n    $message = $_POST['message'] ?? '';\n    $errors = [];\n    \n    \/\/ \u5fc5\u9808\u9805\u76ee\u306e\u30c1\u30a7\u30c3\u30af\n    if (empty($name)) {\n        $errors['name'] = '\u540d\u524d\u306f\u5fc5\u9808\u9805\u76ee\u3067\u3059';\n    } elseif (strlen($name) &gt; 100) {\n        $errors['name'] = '\u540d\u524d\u306f100\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n    }\n    \n    if (empty($email)) {\n        $errors['email'] = '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u9805\u76ee\u3067\u3059';\n    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {\n        $errors['email'] = '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n    }\n    \n    if (empty($message)) {\n        $errors['message'] = '\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u5fc5\u9808\u9805\u76ee\u3067\u3059';\n    }\n    \n    \/\/ \u30a8\u30e9\u30fc\u304c\u306a\u3051\u308c\u3070\u51e6\u7406\u3092\u7d9a\u884c\n    if (empty($errors)) {\n        \/\/ \u30c7\u30fc\u30bf\u306e\u51e6\u7406\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u4fdd\u5b58\u306a\u3069\uff09\n        saveContactForm($name, $email, $message);\n        redirectTo('thank-you.php');\n    }\n}\n<\/pre>\n\n\n\n<p><strong>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3063\u305f\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u95a2\u6570\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30e6\u30fc\u30b6\u30fc\u767b\u9332\u30c7\u30fc\u30bf\u3092\u691c\u8a3c\u3059\u308b\n * @param array $data \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u30c7\u30fc\u30bf\n * @return array \u30a8\u30e9\u30fc\u306e\u30ea\u30b9\u30c8\uff08\u30a8\u30e9\u30fc\u304c\u306a\u3051\u308c\u3070\u7a7a\u914d\u5217\uff09\n *\/\nfunction validateUserData(array $data): array\n{\n    $errors = [];\n    \n    \/\/ \u5fc5\u9808\u9805\u76ee\u306e\u30c1\u30a7\u30c3\u30af\n    if (empty($data['username'])) {\n        $errors['username'] = '\u30e6\u30fc\u30b6\u30fc\u540d\u306f\u5fc5\u9808\u3067\u3059';\n        \/\/ \u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u306f\u4f7f\u308f\u305a\u3001\u3059\u3079\u3066\u306e\u30a8\u30e9\u30fc\u3092\u53ce\u96c6\n    }\n    \n    \/\/ \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\n    if (empty($data['password'])) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (strlen($data['password']) &lt; 8) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306f8\u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    } elseif (!preg_match('\/[A-Z]\/', $data['password'])) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u5927\u6587\u5b57\u3092\u542b\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    } elseif (!preg_match('\/[0-9]\/', $data['password'])) {\n        $errors['password'] = '\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u6570\u5b57\u3092\u542b\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059';\n    }\n    \n    \/\/ \u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u691c\u8a3c\n    if (empty($data['email'])) {\n        $errors['email'] = '\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059';\n    } elseif (!filter_var($data['email'], FILTER_VALIDATE_EMAIL)) {\n        $errors['email'] = '\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044';\n    } elseif (emailExists($data['email'])) {\n        $errors['email'] = '\u3053\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u65e2\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059';\n    }\n    \n    return $errors;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$userData = [\n    'username' =&gt; $_POST['username'] ?? '',\n    'password' =&gt; $_POST['password'] ?? '',\n    'email' =&gt; $_POST['email'] ?? '',\n];\n\n$errors = validateUserData($userData);\n\nif (empty($errors)) {\n    \/\/ \u30e6\u30fc\u30b6\u30fc\u767b\u9332\u51e6\u7406\n    registerUser($userData);\n    redirect('\/login');\n} else {\n    \/\/ \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\n    displayErrors($errors);\n}\n<\/pre>\n\n\n\n<p><strong>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306e\u5206\u96e2\u3068\u518d\u5229\u7528\uff1a<\/strong><\/p>\n\n\n\n<p>\u3088\u308a\u8907\u96d1\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30eb\u30fc\u30eb\u3092\u5206\u96e2\u3057\u3066\u518d\u5229\u7528\u53ef\u80fd\u306b\u3059\u308b\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306e\u5b9a\u7fa9\n$validationRules = [\n    'username' =&gt; [\n        'required' =&gt; true,\n        'min_length' =&gt; 3,\n        'max_length' =&gt; 50,\n        'pattern' =&gt; '\/^[a-zA-Z0-9_]+$\/',\n    ],\n    'email' =&gt; [\n        'required' =&gt; true,\n        'email' =&gt; true,\n        'unique' =&gt; 'users', \/\/ \u30c6\u30fc\u30d6\u30eb\u540d\n    ],\n    'password' =&gt; [\n        'required' =&gt; true,\n        'min_length' =&gt; 8,\n        'contains_uppercase' =&gt; true,\n        'contains_number' =&gt; true,\n    ],\n];\n\n\/\/ \u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u95a2\u6570\nfunction validateField($value, array $rules): ?string\n{\n    if ($rules['required'] &amp;&amp; empty($value)) {\n        return '\u5fc5\u9808\u9805\u76ee\u3067\u3059';\n    }\n    \n    if (!empty($value)) {\n        if (isset($rules['min_length']) &amp;&amp; strlen($value) &lt; $rules['min_length']) {\n            return \"\u6700\u4f4e{$rules['min_length']}\u6587\u5b57\u5fc5\u8981\u3067\u3059\";\n        }\n        \n        if (isset($rules['max_length']) &amp;&amp; strlen($value) &gt; $rules['max_length']) {\n            return \"{$rules['max_length']}\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\";\n        }\n        \n        if (isset($rules['pattern']) &amp;&amp; !preg_match($rules['pattern'], $value)) {\n            return \"\u5165\u529b\u5f62\u5f0f\u304c\u6b63\u3057\u304f\u3042\u308a\u307e\u305b\u3093\";\n        }\n        \n        if (isset($rules['email']) &amp;&amp; $rules['email'] &amp;&amp; !filter_var($value, FILTER_VALIDATE_EMAIL)) {\n            return \"\u6709\u52b9\u306a\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\";\n        }\n        \n        \/\/ \u4ed6\u306e\u30eb\u30fc\u30eb\u3082\u540c\u69d8\u306b\u5b9f\u88c5...\n    }\n    \n    return null; \/\/ \u30a8\u30e9\u30fc\u306a\u3057\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$errors = [];\nforeach ($validationRules as $field =&gt; $rules) {\n    $errorMessage = validateField($_POST[$field] ?? '', $rules);\n    if ($errorMessage) {\n        $errors[$field] = $errorMessage;\n    }\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30c1\u30a7\u30c3\u30af\u3068\u8a8d\u8a3c\u51e6\u7406\u3078\u306e\u5fdc\u7528<\/h3>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u30e6\u30fc\u30b6\u30fc\u306e\u6a29\u9650\u3084\u8a8d\u8a3c\u72b6\u614b\u306b\u57fa\u3065\u3044\u3066\u6a5f\u80fd\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u5fa1\u3059\u308b\u306e\u306f\u4e00\u822c\u7684\u306a\u8981\u4ef6\u3067\u3059\u3002if\u6587\u3092\u4f7f\u3063\u305f\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u8a8d\u8a3c\u30c1\u30a7\u30c3\u30af\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\nsession_start();\n\n\/\/ \u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u306e\u30c1\u30a7\u30c3\u30af\nfunction isLoggedIn(): bool\n{\n    return isset($_SESSION['user_id']) &amp;&amp; !empty($_SESSION['user_id']);\n}\n\n\/\/ \u6a29\u9650\u30c1\u30a7\u30c3\u30af\nfunction hasPermission(string $permission): bool\n{\n    if (!isLoggedIn()) {\n        return false;\n    }\n    \n    \/\/ \u30e6\u30fc\u30b6\u30fc\u306e\u6a29\u9650\u3092\u53d6\u5f97\uff08\u5b9f\u969b\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u306a\u3069\uff09\n    $userPermissions = $_SESSION['permissions'] ?? [];\n    \n    \/\/ 'admin'\u6a29\u9650\u306f\u5168\u3066\u306e\u6a29\u9650\u3092\u6301\u3064\u3068\u4eee\u5b9a\n    if (in_array('admin', $userPermissions)) {\n        return true;\n    }\n    \n    return in_array($permission, $userPermissions);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\uff1a\u8a18\u4e8b\u7de8\u96c6\u30da\u30fc\u30b8\nif (!isLoggedIn()) {\n    \/\/ \u672a\u30ed\u30b0\u30a4\u30f3\u30e6\u30fc\u30b6\u30fc\u306f\u30ed\u30b0\u30a4\u30f3\u30da\u30fc\u30b8\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\n    header('Location: \/login.php');\n    exit;\n}\n\nif (!hasPermission('edit_articles')) {\n    \/\/ \u6a29\u9650\u304c\u306a\u3051\u308c\u3070\u30a8\u30e9\u30fc\u30da\u30fc\u30b8\u306b\n    header('Location: \/access-denied.php');\n    exit;\n}\n\n\/\/ \u3053\u3053\u304b\u3089\u304c\u5b9f\u969b\u306e\u8a18\u4e8b\u7de8\u96c6\u51e6\u7406\n\/\/ ...\n<\/pre>\n\n\n\n<p><strong>\u30ed\u30fc\u30eb\u30d9\u30fc\u30b9\u306e\u6a29\u9650\u30c1\u30a7\u30c3\u30af\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u30ed\u30fc\u30eb\u3068\u6a29\u9650\u306e\u30de\u30c3\u30d4\u30f3\u30b0\n$rolePermissions = [\n    'admin' =&gt; ['create', 'read', 'update', 'delete', 'manage_users'],\n    'editor' =&gt; ['create', 'read', 'update'],\n    'author' =&gt; ['create', 'read', 'update_own'],\n    'subscriber' =&gt; ['read'],\n];\n\n\/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u7279\u5b9a\u306e\u64cd\u4f5c\u3092\u5b9f\u884c\u3067\u304d\u308b\u304b\u30c1\u30a7\u30c3\u30af\nfunction canPerformAction(string $action, array $resource = []): bool\n{\n    if (!isLoggedIn()) {\n        return false;\n    }\n    \n    $userRole = $_SESSION['user_role'] ?? 'guest';\n    \n    \/\/ \u30b2\u30b9\u30c8\u306f\u4f55\u3082\u3067\u304d\u306a\u3044\n    if ($userRole === 'guest') {\n        return false;\n    }\n    \n    \/\/ \u6a29\u9650\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\n    $allowedActions = $GLOBALS['rolePermissions'][$userRole] ?? [];\n    \n    \/\/ \u76f4\u63a5\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\n    if (in_array($action, $allowedActions)) {\n        return true;\n    }\n    \n    \/\/ 'update_own'\u306e\u3088\u3046\u306a\u6240\u6709\u6a29\u95a2\u9023\u306e\u7279\u6b8a\u30b1\u30fc\u30b9\n    if ($action === 'update' &amp;&amp; in_array('update_own', $allowedActions)) {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u304c\u81ea\u5206\u306e\u3082\u306e\u304b\u30c1\u30a7\u30c3\u30af\n        return (int)($resource['user_id'] ?? 0) === (int)$_SESSION['user_id'];\n    }\n    \n    return false;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\n$article = getArticle($articleId); \/\/ \u8a18\u4e8b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n\nif (canPerformAction('update', $article)) {\n    \/\/ \u7de8\u96c6\u30d5\u30a9\u30fc\u30e0\u3092\u8868\u793a\n    showEditForm($article);\n} else {\n    \/\/ \u95b2\u89a7\u30e2\u30fc\u30c9\u3067\u8868\u793a\n    showReadOnlyView($article);\n}\n<\/pre>\n\n\n\n<p><strong>\u968e\u5c64\u7684\u306a\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u968e\u5c64\u7684\u306a\u30bb\u30af\u30b7\u30e7\u30f3\u3068\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\n$sections = [\n    'dashboard' =&gt; ['min_role' =&gt; 'subscriber'],\n    'content' =&gt; [\n        'min_role' =&gt; 'author',\n        'subsections' =&gt; [\n            'articles' =&gt; ['min_role' =&gt; 'author'],\n            'pages' =&gt; ['min_role' =&gt; 'editor'],\n            'media' =&gt; ['min_role' =&gt; 'author'],\n        ],\n    ],\n    'users' =&gt; ['min_role' =&gt; 'admin'],\n    'settings' =&gt; ['min_role' =&gt; 'admin'],\n];\n\n\/\/ \u30ed\u30fc\u30eb\u306e\u968e\u5c64\uff08\u6570\u5024\u304c\u5927\u304d\u3044\u307b\u3069\u6a29\u9650\u304c\u9ad8\u3044\uff09\n$roleHierarchy = [\n    'guest' =&gt; 0,\n    'subscriber' =&gt; 1,\n    'author' =&gt; 2,\n    'editor' =&gt; 3,\n    'admin' =&gt; 4,\n];\n\n\/\/ \u30bb\u30af\u30b7\u30e7\u30f3\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd\u304b\u78ba\u8a8d\nfunction canAccessSection(string $section, string $subsection = null): bool\n{\n    global $sections, $roleHierarchy;\n    \n    if (!isLoggedIn()) {\n        return false;\n    }\n    \n    $userRole = $_SESSION['user_role'] ?? 'guest';\n    $userRoleLevel = $roleHierarchy[$userRole] ?? 0;\n    \n    \/\/ \u30bb\u30af\u30b7\u30e7\u30f3\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    if (!isset($sections[$section])) {\n        return false;\n    }\n    \n    \/\/ \u30b5\u30d6\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u307f\u3092\u30c1\u30a7\u30c3\u30af\n    if ($subsection === null) {\n        $requiredRole = $sections[$section]['min_role'];\n        $requiredRoleLevel = $roleHierarchy[$requiredRole] ?? 0;\n        \n        return $userRoleLevel &gt;= $requiredRoleLevel;\n    }\n    \n    \/\/ \u30b5\u30d6\u30bb\u30af\u30b7\u30e7\u30f3\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    if (!isset($sections[$section]['subsections'][$subsection])) {\n        return false;\n    }\n    \n    \/\/ \u30b5\u30d6\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u5fc5\u8981\u30ed\u30fc\u30eb\u3092\u30c1\u30a7\u30c3\u30af\n    $requiredRole = $sections[$section]['subsections'][$subsection]['min_role'];\n    $requiredRoleLevel = $roleHierarchy[$requiredRole] ?? 0;\n    \n    return $userRoleLevel &gt;= $requiredRoleLevel;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nif (canAccessSection('content', 'articles')) {\n    \/\/ \u8a18\u4e8b\u7ba1\u7406\u753b\u9762\u3092\u8868\u793a\n} else {\n    \/\/ \u30a2\u30af\u30bb\u30b9\u62d2\u5426\n}\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">\u6761\u4ef6\u4ed8\u304dHTML\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>PHP\u306fHTML\u5185\u306b\u57cb\u3081\u8fbc\u3093\u3067\u4f7f\u7528\u3067\u304d\u308b\u305f\u3081\u3001\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u7570\u306a\u308bHTML\u3092\u51fa\u529b\u3059\u308b\u7528\u9014\u306b\u975e\u5e38\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001if\u6587\u3092\u4f7f\u3063\u305f\u6761\u4ef6\u4ed8\u304dHTML\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u6761\u4ef6\u4ed8\u304dHTML\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;div class=\"user-profile\"&gt;\n    &lt;h1&gt;&lt;?= htmlspecialchars($user['name']) ?&gt;&lt;\/h1&gt;\n    \n    &lt;?php if ($user['role'] === 'admin'): ?&gt;\n        &lt;span class=\"badge badge-admin\"&gt;\u7ba1\u7406\u8005&lt;\/span&gt;\n    &lt;?php elseif ($user['role'] === 'moderator'): ?&gt;\n        &lt;span class=\"badge badge-moderator\"&gt;\u30e2\u30c7\u30ec\u30fc\u30bf\u30fc&lt;\/span&gt;\n    &lt;?php endif; ?&gt;\n    \n    &lt;div class=\"user-info\"&gt;\n        &lt;p&gt;\u767b\u9332\u65e5: &lt;?= formatDate($user['created_at']) ?&gt;&lt;\/p&gt;\n        \n        &lt;?php if (!empty($user['bio'])): ?&gt;\n            &lt;div class=\"bio\"&gt;\n                &lt;?= nl2br(htmlspecialchars($user['bio'])) ?&gt;\n            &lt;\/div&gt;\n        &lt;?php else: ?&gt;\n            &lt;p class=\"no-bio\"&gt;\u81ea\u5df1\u7d39\u4ecb\u306f\u307e\u3060\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002&lt;\/p&gt;\n        &lt;?php endif; ?&gt;\n    &lt;\/div&gt;\n    \n    &lt;?php if ($currentUser['id'] === $user['id'] || $currentUser['role'] === 'admin'): ?&gt;\n        &lt;div class=\"action-buttons\"&gt;\n            &lt;a href=\"\/profile\/edit\" class=\"btn\"&gt;\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u7de8\u96c6&lt;\/a&gt;\n            &lt;?php if ($currentUser['role'] === 'admin'): ?&gt;\n                &lt;a href=\"\/admin\/users\/&lt;?= $user['id'] ?&gt;\" class=\"btn btn-admin\"&gt;\u30e6\u30fc\u30b6\u30fc\u7ba1\u7406&lt;\/a&gt;\n            &lt;?php endif; ?&gt;\n        &lt;\/div&gt;\n    &lt;?php endif; ?&gt;\n&lt;\/div&gt;\n<\/pre>\n\n\n\n<p><strong>\u6761\u4ef6\u4ed8\u304d\u30af\u30e9\u30b9\u306e\u9069\u7528\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;nav class=\"main-nav\"&gt;\n    &lt;ul&gt;\n        &lt;?php foreach ($menuItems as $item): ?&gt;\n            &lt;li class=\"&lt;?= ($currentPage === $item['slug']) ? 'active' : '' ?&gt;\"&gt;\n                &lt;a href=\"&lt;?= $item['url'] ?&gt;\"&gt;\n                    &lt;?= htmlspecialchars($item['title']) ?&gt;\n                    \n                    &lt;?php if (!empty($item['count'])): ?&gt;\n                        &lt;span class=\"badge\"&gt;&lt;?= $item['count'] ?&gt;&lt;\/span&gt;\n                    &lt;?php endif; ?&gt;\n                &lt;\/a&gt;\n                \n                &lt;?php if (!empty($item['children'])): ?&gt;\n                    &lt;ul class=\"submenu\"&gt;\n                        &lt;?php foreach ($item['children'] as $child): ?&gt;\n                            &lt;li class=\"&lt;?= ($currentPage === $child['slug']) ? 'active' : '' ?&gt;\"&gt;\n                                &lt;a href=\"&lt;?= $child['url'] ?&gt;\"&gt;&lt;?= htmlspecialchars($child['title']) ?&gt;&lt;\/a&gt;\n                            &lt;\/li&gt;\n                        &lt;?php endforeach; ?&gt;\n                    &lt;\/ul&gt;\n                &lt;?php endif; ?&gt;\n            &lt;\/li&gt;\n        &lt;?php endforeach; ?&gt;\n    &lt;\/ul&gt;\n&lt;\/nav&gt;\n<\/pre>\n\n\n\n<p><strong>\u6a29\u9650\u306b\u57fa\u3065\u3044\u305fUI\u8981\u7d20\u306e\u8868\u793a\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;div class=\"article\"&gt;\n    &lt;h1&gt;&lt;?= htmlspecialchars($article['title']) ?&gt;&lt;\/h1&gt;\n    \n    &lt;div class=\"meta\"&gt;\n        &lt;span class=\"author\"&gt;\u4f5c\u6210\u8005: &lt;?= htmlspecialchars($article['author_name']) ?&gt;&lt;\/span&gt;\n        &lt;span class=\"date\"&gt;\u6295\u7a3f\u65e5: &lt;?= formatDate($article['created_at']) ?&gt;&lt;\/span&gt;\n        \n        &lt;?php if ($article['updated_at'] !== $article['created_at']): ?&gt;\n            &lt;span class=\"updated\"&gt;(\u66f4\u65b0\u65e5: &lt;?= formatDate($article['updated_at']) ?&gt;)&lt;\/span&gt;\n        &lt;?php endif; ?&gt;\n    &lt;\/div&gt;\n    \n    &lt;div class=\"content\"&gt;\n        &lt;?= $article['content_html'] ?&gt;\n    &lt;\/div&gt;\n    \n    &lt;div class=\"actions\"&gt;\n        &lt;?php if (canPerformAction('update', $article)): ?&gt;\n            &lt;a href=\"\/articles\/&lt;?= $article['id'] ?&gt;\/edit\" class=\"btn btn-edit\"&gt;\u7de8\u96c6&lt;\/a&gt;\n        &lt;?php endif; ?&gt;\n        \n        &lt;?php if (canPerformAction('delete', $article)): ?&gt;\n            &lt;form method=\"post\" action=\"\/articles\/&lt;?= $article['id'] ?&gt;\/delete\" class=\"delete-form\"&gt;\n                &lt;button type=\"submit\" class=\"btn btn-delete\" onclick=\"return confirm('\u672c\u5f53\u306b\u524a\u9664\u3057\u307e\u3059\u304b\uff1f')\"&gt;\u524a\u9664&lt;\/button&gt;\n            &lt;\/form&gt;\n        &lt;?php endif; ?&gt;\n    &lt;\/div&gt;\n    \n    &lt;?php if ($article['comments_enabled']): ?&gt;\n        &lt;div class=\"comments\"&gt;\n            &lt;h2&gt;\u30b3\u30e1\u30f3\u30c8&lt;\/h2&gt;\n            \n            &lt;?php if (empty($comments)): ?&gt;\n                &lt;p class=\"no-comments\"&gt;\u307e\u3060\u30b3\u30e1\u30f3\u30c8\u306f\u3042\u308a\u307e\u305b\u3093\u3002&lt;\/p&gt;\n            &lt;?php else: ?&gt;\n                &lt;ul class=\"comment-list\"&gt;\n                    &lt;?php foreach ($comments as $comment): ?&gt;\n                        &lt;li class=\"comment\"&gt;\n                            &lt;div class=\"comment-header\"&gt;\n                                &lt;span class=\"commenter\"&gt;&lt;?= htmlspecialchars($comment['name']) ?&gt;&lt;\/span&gt;\n                                &lt;span class=\"comment-date\"&gt;&lt;?= formatDate($comment['created_at']) ?&gt;&lt;\/span&gt;\n                            &lt;\/div&gt;\n                            &lt;div class=\"comment-body\"&gt;\n                                &lt;?= nl2br(htmlspecialchars($comment['content'])) ?&gt;\n                            &lt;\/div&gt;\n                            \n                            &lt;?php if (isLoggedIn() &amp;&amp; ($currentUser['role'] === 'admin' || $currentUser['role'] === 'moderator')): ?&gt;\n                                &lt;div class=\"comment-actions\"&gt;\n                                    &lt;form method=\"post\" action=\"\/comments\/&lt;?= $comment['id'] ?&gt;\/delete\"&gt;\n                                        &lt;button type=\"submit\" class=\"btn-small\"&gt;\u524a\u9664&lt;\/button&gt;\n                                    &lt;\/form&gt;\n                                &lt;\/div&gt;\n                            &lt;?php endif; ?&gt;\n                        &lt;\/li&gt;\n                    &lt;?php endforeach; ?&gt;\n                &lt;\/ul&gt;\n            &lt;?php endif; ?&gt;\n            \n            &lt;?php if (isLoggedIn()): ?&gt;\n                &lt;form class=\"comment-form\" method=\"post\" action=\"\/articles\/&lt;?= $article['id'] ?&gt;\/comments\"&gt;\n                    &lt;textarea name=\"content\" required placeholder=\"\u30b3\u30e1\u30f3\u30c8\u3092\u5165\u529b...\"&gt;&lt;\/textarea&gt;\n                    &lt;button type=\"submit\" class=\"btn\"&gt;\u30b3\u30e1\u30f3\u30c8\u3092\u6295\u7a3f&lt;\/button&gt;\n                &lt;\/form&gt;\n            &lt;?php else: ?&gt;\n                &lt;p class=\"login-to-comment\"&gt;\n                    &lt;a href=\"\/login?redirect=&lt;?= urlencode($_SERVER['REQUEST_URI']) ?&gt;\"&gt;\u30ed\u30b0\u30a4\u30f3&lt;\/a&gt;\u3057\u3066\u30b3\u30e1\u30f3\u30c8\u3092\u6295\u7a3f\u3067\u304d\u307e\u3059\u3002\n                &lt;\/p&gt;\n            &lt;?php endif; ?&gt;\n        &lt;\/div&gt;\n    &lt;?php endif; ?&gt;\n&lt;\/div&gt;\n<\/pre>\n\n\n\n<p><strong>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u7d44\u307f\u7acb\u3066\uff1a<\/strong><\/p>\n\n\n\n<p>\u8907\u96d1\u306aWeb\u30da\u30fc\u30b8\u3067\u306f\u3001\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u3055\u307e\u3056\u307e\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u90e8\u54c1\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;!DOCTYPE html&gt;\n&lt;html lang=\"ja\"&gt;\n&lt;head&gt;\n    &lt;meta charset=\"UTF-8\"&gt;\n    &lt;title&gt;&lt;?= htmlspecialchars($pageTitle) ?&gt; | \u30b5\u30a4\u30c8\u540d&lt;\/title&gt;\n    \n    &lt;link rel=\"stylesheet\" href=\"\/css\/main.css\"&gt;\n    \n    &lt;?php if ($useCustomStyles): ?&gt;\n        &lt;link rel=\"stylesheet\" href=\"\/css\/custom.css\"&gt;\n    &lt;?php endif; ?&gt;\n    \n    &lt;?php if ($page === 'dashboard'): ?&gt;\n        &lt;link rel=\"stylesheet\" href=\"\/css\/dashboard.css\"&gt;\n        &lt;script src=\"\/js\/charts.js\" defer&gt;&lt;\/script&gt;\n    &lt;?php endif; ?&gt;\n&lt;\/head&gt;\n&lt;body class=\"&lt;?= $bodyClass ?&gt;\"&gt;\n    &lt;?php include 'templates\/header.php'; ?&gt;\n    \n    &lt;main class=\"container\"&gt;\n        &lt;?php if (!empty($flashMessage)): ?&gt;\n            &lt;div class=\"alert alert-&lt;?= $flashMessage['type'] ?&gt;\"&gt;\n                &lt;?= htmlspecialchars($flashMessage['message']) ?&gt;\n            &lt;\/div&gt;\n        &lt;?php endif; ?&gt;\n        \n        &lt;?php\n        \/\/ \u30da\u30fc\u30b8\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\n        $templateFile = 'templates\/pages\/' . $page . '.php';\n        if (file_exists($templateFile)) {\n            include $templateFile;\n        } else {\n            include 'templates\/pages\/404.php';\n        }\n        ?&gt;\n    &lt;\/main&gt;\n    \n    &lt;?php\n    \/\/ \u30d5\u30c3\u30bf\u30fc\u306e\u6761\u4ef6\u4ed8\u304d\u8aad\u307f\u8fbc\u307f\n    if ($showFooter) {\n        include 'templates\/footer.php';\n    }\n    ?&gt;\n    \n    &lt;script src=\"\/js\/main.js\"&gt;&lt;\/script&gt;\n    \n    &lt;?php if ($useAnalytics &amp;&amp; !$currentUser['privacy_opt_out']): ?&gt;\n        &lt;script src=\"\/js\/analytics.js\"&gt;&lt;\/script&gt;\n    &lt;?php endif; ?&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;\n<\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u306e\u5b9f\u8df5\u4f8b\u3092\u901a\u3058\u3066\u3001PHP\u306e\u6761\u4ef6\u5206\u5c90\u304cWeb\u958b\u767a\u306b\u304a\u3051\u308b\u69d8\u3005\u306a\u72b6\u6cc1\u3067\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3067\u304d\u308b\u304b\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u9069\u5207\u306a\u6761\u4ef6\u5206\u5c90\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3001\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306aif\u6587\u306e\u6d3b\u7528\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong>: \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306f\u5e38\u306b\u7591\u3044\u3001\u9069\u5207\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046<\/li>\n\n\n\n<li><strong>\u30a8\u30e9\u30fc\u53ce\u96c6<\/strong>: \u30a8\u30e9\u30fc\u30921\u3064\u305a\u3064\u8868\u793a\u3059\u308b\u3088\u308a\u3082\u3001\u307e\u3068\u3081\u3066\u53ce\u96c6\u3057\u3066\u8868\u793a\u3059\u308b\u65b9\u304c\u826f\u3044UX<\/li>\n\n\n\n<li><strong>\u6a29\u9650\u306e\u968e\u5c64\u5316<\/strong>: \u6a29\u9650\u306f\u968e\u5c64\u7684\u306b\u8a2d\u8a08\u3057\u3001\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3059<\/li>\n\n\n\n<li><strong>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3<\/strong>: \u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u3067\u306f\u3001\u5426\u5b9a\u6761\u4ef6\u3092\u5148\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3059\u308b<\/li>\n\n\n\n<li><strong>HTML\u57cb\u3081\u8fbc\u307f<\/strong>: PHP\u306e\u6761\u4ef6\u6587\u3092HTML\u306b\u76f4\u63a5\u57cb\u3081\u8fbc\u3080\u3053\u3068\u3067\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u8a00\u8a9e\u306e\u3088\u3046\u306a\u67d4\u8edf\u6027\u304c\u5f97\u3089\u308c\u308b<\/li>\n\n\n\n<li><strong>\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5206\u96e2<\/strong>: \u8907\u96d1\u306a\u6761\u4ef6\u5224\u65ad\u306f\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u5c64\u306b\u5206\u96e2\u3057\u3001\u8868\u793a\u5c64\u306f\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3064<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u3067Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3001\u300c\u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u3044\u305f\u3089A\u3092\u8868\u793a\u3001\u305d\u3046\u3067\u306a\u3051\u308c\u3070B\u3092\u8868\u793a\u300d\u300c\u5165\u529b\u5024\u304c\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308c\u3070\u4fdd\u5b58\u3001\u305d\u3046\u3067\u306a\u3051\u308c\u3070\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u300d\u306a\u3069\u3001\u6761\u4ef6\u306b\u3088\u3063\u3066\u51e6\u7406\u3092\u5206\u5c90\u3055\u305b\u308b &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,63],"tags":[],"class_list":{"0":"post-3425","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-php","7":"category-php-syntax","8":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3425"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3425\/revisions"}],"predecessor-version":[{"id":3426,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/3425\/revisions\/3426"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}