{"id":30730,"date":"2024-01-17T16:13:27","date_gmt":"2023-05-30T21:20:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0\/"},"modified":"2025-08-12T20:32:56","modified_gmt":"2025-08-12T12:32:56","slug":"%e3%80%90php%e3%80%91%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0\/","title":{"rendered":"\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0"},"content":{"rendered":"<h1>\u4e00\u5f00\u59cb\u6211\u4f1a\u5199\u4e0b\u81ea\u5df1\u5b66\u4e60\u7684\u5185\u5bb9\u3002\u57fa\u672c\u4e0a\u4f1a\u662f\u6211\u80fd\u7406\u89e3\u7684\u5185\u5bb9\uff0c\u8bf7\u591a\u5305\u6db5\u3002\u5982\u679c\u6709\u9519\u8bef\u7684\u5730\u65b9\uff0c\u8bf7\u5728\u8bc4\u8bba\u4e2d\u6307\u51fa\u3002<\/p>\n<p>\u6709\u6807\u6709\u201c\u786e\u8ba4\u201d\u7684\u5185\u5bb9\u90fd\u5e94\u8be5\u5728\u6267\u884c\u4e4b\u524d\u8fdb\u884c\u5fc5\u987b\u7684\u8c37\u6b4c\u641c\u7d22\u3002<\/p>\n<h1>\u6307\u6807<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PHP\u3063\u3066\u306a\u3093\u305e\uff1f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">echo\u3068print\u306e\u3061\u304c\u3044\u3068\u4f7f\u3044\u3069\u3053\u308d<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u56db\u5247\u6f14\u7b97\u51e6\u7406<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6587\u5b57\u5217\u3068\u6570\u5024<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u3068\u5b9a\u6570<\/ul>\n<\/li>\n<\/ul>\n<p>\u5909\u6570<br \/>\n\u5b9a\u6570<\/p>\n<p>if\u6587<\/p>\n<h1>PHP\u662f\u4ec0\u4e48\u4e1c\u897f\uff1fPHP\u53ef\u4ee5\u5d4c\u5165\u5230HTML\u4e2d\uff0c\u662f\u5e38\u7528\u4e8eWeb\u5f00\u53d1\u7684\u811a\u672c\u8bed\u8a00\u3002<br \/>\n\u203bJavaScript\u4e5f\u662f\u4e00\u79cd\u811a\u672c\u8bed\u8a00\uff0cPHP\u548cJavaScript\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u5b83\u4eec\u4ee3\u7801\u7684\u6267\u884c\u4f4d\u7f6e\u3002<\/p>\n<p>JavaScript\u662f\u4e00\u79cd\u5728\u5ba2\u6237\u7aef\uff08\u6d4f\u89c8\u7f51\u7ad9\u7684\u6d4f\u89c8\u5668\uff09\u63a5\u6536\u5e76\u6267\u884c\u4ee3\u7801\u7684\u8bed\u8a00\u3002\u56e0\u6b64\uff0c\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u770b\u5230\u5199\u4e86\u4ec0\u4e48\u6837\u7684\u4ee3\u7801?\u3002<\/p>\n<p>PHP\u662f\u5728\u670d\u52a1\u5668\u7aef\u6267\u884c\u4ee3\u7801\uff0c\u5ba2\u6237\u7aef\u53ea\u63a5\u6536\u7ed3\u679c\uff0c\u65e0\u6cd5\u770b\u5230\u7ed3\u679c\u662f\u7531\u4ec0\u4e48\u4ee3\u7801\u5bfc\u51fa\u7684?\u3002<\/p>\n<p>PHP\u53ef\u4ee5\u5d4c\u5165\u5230HTML\u4e2d\u4f7f\u7528\uff0c\u5728<!--?php \u301c ?-->\u4e4b\u95f4\u7f16\u5199PHP\u6307\u4ee4\u3002<br \/>\n\uff08\u5176\u4e2d<!--?php \u301c ?-->\u90e8\u5206\u4f1a\u88ab\u8f6c\u6362\u4e3aHTML\u5e76\u663e\u793a\u3002\uff09<\/p>\n<p>\u5728PHP\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5206\u53f7\u201c;\u201d\u6765\u5206\u9694\u53e5\u5b50\u3002\u5982\u679c\u51fa\u73b0\u9519\u8bef\uff0c\u4f1a\u5bfc\u81f4\u95ee\u9898\u53d1\u751f\u266b<br \/>\n\u53e6\u5916\uff0c\u4ece\u201c\/\/\u201d\u5230\u884c\u5c3e\u7684\u5185\u5bb9\u662f\u6ce8\u91ca\u3002\u5b83\u4eec\u4e0d\u4f1a\u5bf9\u7a0b\u5e8f\u7684\u8fd0\u884c\u4ea7\u751f\u5f71\u54cd\uff0c\u4e3b\u8981\u7528\u4e8e\u5199\u5165\u4e00\u4e9b\u5907\u6ce8\u6216\u8005\u5907\u5fd8\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;!DOCTYPE html&gt;<\/span>\r\n<span class=\"nt\">&lt;html&gt;<\/span>\r\n<span class=\"nt\">&lt;head&gt;<\/span>\r\n  <span class=\"nt\">&lt;meta<\/span> <span class=\"na\">charset=<\/span><span class=\"s\">\"utf-8\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;title&gt;<\/span>xxx<span class=\"nt\">&lt;\/title&gt;<\/span>\r\n  <span class=\"nt\">&lt;link<\/span> <span class=\"na\">rel=<\/span><span class=\"s\">\"stylesheet\"<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\/css\"<\/span> <span class=\"na\">href=<\/span><span class=\"s\">\"stylesheet.css\"<\/span><span class=\"nt\">&gt;<\/span>\r\n<span class=\"nt\">&lt;\/head&gt;<\/span>\r\n<span class=\"nt\">&lt;body&gt;<\/span>\r\n\r\n<span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"k\">print<\/span> <span class=\"s2\">\"hello,world!\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c hello,world!<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n\r\n<span class=\"nt\">&lt;\/body&gt;<\/span>\r\n<span class=\"nt\">&lt;\/html&gt;<\/span>\r\n<\/code><\/pre>\n<h1>echo \u548c print \u7684\u533a\u522b\u548c\u4f7f\u7528\u573a\u5408\u5173\u4e8e\u300cecho\u300d\u548c\u300cprint\u300d\u6709\u6240\u533a\u522b\u3002<\/p>\n<p>\u300cecho\u300d\u548c\u300cprint\u300d\u90fd\u662f\u7528\u4e8e\u8f93\u51fa\u5b57\u7b26\u4e32\u7b49\u7684\u547d\u4ee4\u3002<\/p>\n<p>\u6700\u5927\u7684\u4e0d\u540c\u5728\u4e8e\u8868\u8fbe\u5f0f\uff08expression\uff09\u662f\u5426\u53ef\u4ee5\u3002<br \/>\n\u65e0\u6cd5\u5c06&#8221;echo&#8221;\u653e\u5165if\u8bed\u53e5\u4e2d\uff0c\u4f46\u5bf9\u4e8e&#8221;print&#8221;\uff0c\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/print<\/span>\r\n<span class=\"c1\">\/\/\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u5834\u5408\u306f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u300c'\u300d\u304b\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u300c\"\u300d\u3067\u56f2\u3080\u3002<\/span>\r\n<span class=\"k\">print<\/span> <span class=\"s2\">\"hello,world!\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c hello,world!<\/span>\r\n\r\n<span class=\"c1\">\/\/echo<\/span>\r\n<span class=\"c1\">\/\/\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u5834\u5408\u306f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u300c'\u300d\u304b\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u300c\"\u300d\u3067\u56f2\u3080\u3002<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"hello,world!\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c\u3000hello,world!<\/span>\r\n\r\n\r\n\r\n<span class=\"c1\">\/\/ echo \u306e\u5834\u5408: \u00d7<\/span>\r\n<span class=\"c1\">\/\/ Parse error \u306b\u306a\u308b<\/span>\r\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"k\">echo<\/span> <span class=\"mi\">5<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">print<\/span> <span class=\"s1\">'echo is an expression with return value'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ print \u306e\u5834\u5408: \u25cb<\/span>\r\n<span class=\"c1\">\/\/ \u554f\u984c\u306a\u304f\u52d5\u4f5c\u3059\u308b<\/span>\r\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"k\">print<\/span> <span class=\"mi\">5<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">print<\/span> <span class=\"s1\">'print is an expression with return value'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u56db\u5219\u8fd0\u7b97\u5904\u7406<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">echo<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 5<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 1<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 6<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">9<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 3<\/span>\r\n\r\n<span class=\"c1\">\/\/\u5272\u308a\u7b97\u306e\u4f59\u308a<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"mi\">5<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 1<\/span>\r\n<\/code><\/pre>\n<h1>\u6587\u5b57\u548c\u6570\u5b57\u5728PHP\u4e2d\uff0c\u6709\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5982\u5b57\u7b26\u4e32\u548c\u6570\u5b57\u3002<br \/>\n\u50cf&#8217;Hello&#8217;\u548c&#8217;a&#8217;\u662f\u5b57\u7b26\u4e32\uff0c\u800c1\u548c3.14\u5219\u662f\u6570\u5b57\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">echo<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 5<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"3 + 2\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 3 + 2<\/span>\r\n<\/code><\/pre>\n<h1>\u53d8\u91cf\u4e0e\u5e38\u91cf y\u01d4 .<\/p>\n<h2>\u53d8\u91cf\u7f16\u7a0b\u4e2d\u7684\u91cd\u8981\u6982\u5ff5\u548c\u6709\u8da3\u90e8\u5206\uff01\u53d8\u91cf\u662f\u5b58\u653e\u6570\u636e\u7684\u5bb9\u5668\uff0c\u901a\u8fc7\u5728\u524d\u9762\u52a0\u4e0a&#8221;$&#8221;\u7b26\u53f7\u6765\u5b9a\u4e49\u53d8\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528&#8221;$\u53d8\u91cf\u540d = \u503c;&#8221;\u5c06\u5404\u79cd\u503c\u8d4b\u7ed9\u53d8\u91cf\u3002\u5728\u7f16\u7a0b\u4e16\u754c\u4e2d\uff0c\u7b49\u53f7&#8221;=&#8221;\u8868\u793a\u5c06\u53f3\u8fb9\u7684\u503c\u8d4b\u7ed9\u5de6\u8fb9\u7684\u53d8\u91cf\uff0c\u8981\u6ce8\u610f\uff01<\/p>\n<h3>\u53d8\u91cf\u7684\u4e3b\u8981\u89c4\u5219<br \/>\n\u00b7 \u53d8\u91cf\u540d\u4ee5\u7f8e\u5143\u7b26\u53f7\u5f00\u5934\u3002<br \/>\n\u00b7 \u53d8\u91cf\u540d\u533a\u5206\u5927\u5c0f\u5199\uff08\u7f8e\u5143\u7b26\u53f7a\u548c\u7f8e\u5143\u7b26\u53f7A\u88ab\u89c6\u4e3a\u4e0d\u540c\u7684\u53d8\u91cf\uff09\u3002<br \/>\n\u00b7 \u53ef\u7528\u4e8e\u53d8\u91cf\u540d\u79f0\u7684\u5b57\u7b26\u5982\u4e0b\uff1a<br \/>\n\u00b7 \u82f1\u6587\u5b57\u6bcd\uff08a~z\u6216A~Z\uff09<br \/>\n\u00b7 \u6570\u5b57\uff08\u4f46\u4e0d\u80fd\u4f5c\u4e3a\u9996\u5b57\u7b26\uff09<br \/>\n\u00b7 \u4e0b\u5212\u7ebf (_)<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">hoge<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$name<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c hoge<\/span>\r\n\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">7<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$area<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$x<\/span> <span class=\"o\">*<\/span> <span class=\"nv\">$x<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$area<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 49\uff08\u6b63\u65b9\u5f62\u306e\u8a08\u7b97\uff09<\/span>\r\n<\/code><\/pre>\n<div>\n<div class=\"post-table\">\u4f8b\u5177\u4f53\u4f8b\u7406\u7531\u6570\u5b57\u958b\u59cb1nam\u30a8\u30e9\u30fc\u51fa\u308b\u30ed\u30fc\u30de\u5b57aisatu\u308f\u304b\u308a\u306b\u304f\u3044\u65e5\u672c\u8a9e\u540d\u524d\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u65e5\u672c\u8a9e\u306f\u3042\u307e\u308a\u3088\u308d\u3057\u304f\u306a\u3044\u4ee5\u4e0b\u7684\u7279\u6b8a\u53d8\u91cf\u540d\u5df2\u7ecf\u88ab\u5b9a\u4e49\u4e86\u3002\uff08\u4e0d\u80fd\u4f7f\u7528\u76f8\u540c\u7684\u540d\u79f0\uff09<br \/>\n\u66f4\u591a\u8be6\u60c5\u8bf7\u53c2\u8003\u3002<\/p>\n<div>\n<div class=\"post-table\">\u5909\u6570\u540d$this$GLOBALS$_SERVER$_GET$_POST$_COOKIE$_FILES$_SESSION\u203b\u53d8\u91cf\u53ef\u4ee5\u6539\u53d8\u5176\u5185\u90e8\u7684\u503c\u3002<br \/>\n\u5982\u679c\u5c06\u65b0\u7684\u503c\u518d\u6b21\u8d4b\u7ed9\u53d8\u91cf\uff0c\u540e\u9762\u7684\u8d4b\u503c\u5c06\u4f1a\u8986\u76d6\u53d8\u91cf\u7684\u5185\u5bb9\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$nam<\/span> <span class=\"c1\">\/\/\u7d50\u679c 3<\/span>\r\n\r\n<span class=\"nv\">$num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$nam<\/span> <span class=\"c1\">\/\/\u7d50\u679c 5<\/span>\r\n<\/code><\/pre>\n<h3>\u5f53\u60f3\u8981\u5c06\u53d8\u91cf\u7684\u503c\u52a0\u4e0ax\u65f6.<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$x<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$x<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 11<\/span>\r\n\r\n<span class=\"c1\">\/\/\u7701\u7565\u5f62<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">-=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">\/=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">%=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/\u8db3\u3059\u6570\u5b57\u304c\uff11\u306e\u6642\u306e\u307f<\/span>\r\n<span class=\"nv\">$x<\/span><span class=\"o\">++<\/span>\r\n<span class=\"nv\">$x<\/span><span class=\"o\">--<\/span>\r\n\r\n<span class=\"c1\">\/\/++\u3092\u5909\u6570\u306e\u524d\u306b\u66f8\u304f\u3068\u305d\u306e\u884c\u306e\u547d\u4ee4\u304c\u5b9f\u884c\u3055\u308c\u308b\u524d\u306b\u8db3\u3055\u308c\u308b<\/span>\r\n<span class=\"c1\">\/\/++\u3092\u5909\u6570\u306e\u5f8c\u306b\u66f8\u304f\u3068\u305d\u306e\u884c\u306e\u547d\u4ee4\u304c\u5b9f\u884c\u3055\u308c\u305f\u5f8c\u306b\u8db3\u3055\u308c\u307e\u3059<\/span>\r\n<span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$y<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"o\">++<\/span><span class=\"nv\">$x<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 4<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"o\">++<\/span><span class=\"nv\">$y<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 3<\/span>\r\n<\/code><\/pre>\n<h3>\u5c06\u6587\u5b57\u4e32\u8fde\u63a5\u5728\u4e00\u8d77<br \/>\n\u4f7f\u7528\u53e5\u70b9\u300c.\u300d\u7b26\u53f7\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u8fde\u63a5\u8d77\u6765\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6587\u5b57\u5217\u540c\u58eb\u306e\u9023\u7d50<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u3068\u6587\u5b57\u5217\u306e\u9023\u7d50<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5909\u6570\u540c\u58eb\u306e\u9023\u7d50<\/ul>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'PHP'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"n\">x<\/span><span class=\"mf\">.<\/span><span class=\"s1\">'\u697d\u3057\u3044'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c PHP\u697d\u3057\u3044<\/span>\r\n\r\n<span class=\"nv\">$y<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'\u9811\u5f35\u308d\u3046\uff01'<\/span><span class=\"o\">:<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"n\">x<\/span><span class=\"mf\">.<\/span><span class=\"n\">y<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c PHP\u9811\u5f35\u308d\u3046\uff01<\/span>\r\n\r\n\r\n\r\n<span class=\"c1\">\/\/.= \u3092\u7528\u3044\u308b\u3068\u5909\u6570\u3068\u6587\u5b57\u5217\u306e\u9023\u7d50\u3092\u7701\u7565<\/span>\r\n<span class=\"nv\">$name<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$name<\/span> <span class=\"mf\">.<\/span><span class=\"o\">=<\/span> <span class=\"s1\">'\u3067\u3059\uff01'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$name<\/span> <span class=\"c1\">\/\/\u7d50\u679c hoge\u3067\u3059\uff01<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4f7f\u7528\u53cc\u5f15\u53f7\u5c06\u5b57\u7b26\u4e32\u62ec\u8d77\u6765\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528{}\u5c06\u5176\u4e2d\u7684\u53d8\u91cf\u62ec\u8d77\u6765\uff0c\u5e76\u5c06\u5176\u66ff\u6362\u4e3a\u53d8\u91cf\u6240\u5305\u542b\u7684\u503c\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528\u5355\u5f15\u53f7\u5f15\u7528\u5b57\u7b26\u4e32\uff0c\u53d8\u91cf\u5c06\u4e0d\u4f1a\u88ab\u5c55\u5f00\uff0c\u5373\u4f7f\u53d8\u91cf\u88ab\u7528\u82b1\u62ec\u53f7\u62ec\u8d77\u6765\uff0c\u4e5f\u4f1a\u88ab\u89c6\u4e3a\u539f\u59cb\u5b57\u7b26\u4e32\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'hoge'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"\u3053\u3093\u306b\u3061\u306f\u3001 <\/span><span class=\"si\">{<\/span><span class=\"nv\">$x<\/span><span class=\"si\">}<\/span><span class=\"s2\"> \u3055\u3093\u3002\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c \u3053\u3093\u306b\u3061\u306f\u3001 hoge \u3055\u3093\u3002<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'\u3053\u3093\u306b\u3061\u306f\u3001 {$x} \u3055\u3093\u3002'<\/span><span class=\"p\">;<\/span><span class=\"c1\">\/\/\u7d50\u679c \u3053\u3093\u306b\u3061\u306f\u3001 {$x} \u3055\u3093\u3002<\/span>\r\n<\/code><\/pre>\n<h2>\u56fa\u5b9a\u7684\u6570\u5b57\u5e38\u91cf\u5c31\u50cf\u653e\u5165\u6570\u636e\uff08\u503c\uff09\u7684\u76d2\u5b50\u4e00\u6837\u3002<br \/>\n\u8981\u7ed9\u5e38\u91cf\u8d4b\u503c\uff08\u5b9a\u4e49\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b9a\u4e49\u51fd\u6570define\u3002<br \/>\n\u5728\u8fd9\u91cc\uff0c\u53ef\u4ee5\u7c97\u7565\u5730\u5c06\u5176\u60f3\u8c61\u4e3a\u300c\u547d\u4ee4\u7684\u4e1c\u897f\u300d\u3002<\/p>\n<h3>\u5b9a\u6570\u7684\u89c4\u5219\u30fb\u5e38\u6570\u5728\u9996\u4f4d\u4e0d\u9700\u8981\u7f8e\u5143\u7b26\u53f7($)<br \/>\n\u30fb\u53ea\u6709\u901a\u8fc7define\u51fd\u6570\u624d\u80fd\u5b9a\u4e49\u5e38\u6570\uff08\u4e0d\u80fd\u901a\u8fc7\u7b80\u5355\u7684\u8d4b\u503c\uff08=\uff09\u5b9a\u4e49\uff09<br \/>\n\u30fb\u5e38\u6570\u4e00\u65e6\u88ab\u8bbe\u7f6e\uff0c\u65e0\u6cd5\u91cd\u65b0\u5b9a\u4e49\u6216\u672a\u5b9a\u4e49<br \/>\n\u30fb\u5e38\u6570\u53ea\u80fd\u6307\u5b9a\u6807\u91cf\u6570\u636e\uff08\u503c\uff09\uff08\u5e03\u5c14\u3001\u6574\u6570\u3001\u6d6e\u70b9\u6570\u3001\u5b57\u7b26\u4e32\u3001\u7a7a\u503c\u7c7b\u578b\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">define<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"TITLE\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\" \u57fa\u790e\u30e1\u30e2\"<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"nb\">define<\/span><span class=\"p\">(<\/span><span class=\"s2\">\"TITLE\"<\/span><span class=\"p\">,<\/span> <span class=\"s2\">\"\u30bf\u30a4\u30c8\u30eb\"<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/\u518d\u5b9a\u7fa9\u306f\u3067\u304d\u306a\u3044\u306e\u3067\u3001\u3053\u308c\u306f\u5b9a\u7fa9\u3055\u308c\u306a\u3044\u305e<\/span>\r\n\r\n<span class=\"nb\">define<\/span> <span class=\"p\">(<\/span><span class=\"s2\">\"TAX\"<\/span> <span class=\"p\">,<\/span> <span class=\"mf\">1.08<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/\u6d88\u8cbb\u7a0e\u306a\u3069\u3067\u6d3b\u7528\u3067\u304d\u305d\u3046\u266b<\/span>\r\n<span class=\"k\">print<\/span> <span class=\"mi\">100<\/span> <span class=\"o\">*<\/span> <span class=\"no\">TAX<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u7d50\u679c 108<\/span>\r\n<\/code><\/pre>\n<h1>\u5982\u679c\u6761\u4ef6\u6210\u7acb\u7684\u8bdd\u4f7f\u7528if\u8bed\u53e5\uff0c\u53ef\u4ee5\u6839\u636e\u6761\u4ef6\u8fdb\u884c\u5206\u652f\u5904\u7406\uff01<br \/>\n&#8220;`php:xxx.php<br \/>\n$x = 20;<br \/>\nif ($x &gt; 10)<br \/>\n{<br \/>\necho &#8216;\u5927\u4e8e10\u7684\u6570\u5b57\uff01&#8217;<br \/>\n}<br \/>\n\/\/\u7ed3\u679c \u5927\u4e8e10\u7684\u6570\u5b57\uff01<\/p>\n<p>\u5982\u679c ($x &lt; 10) {<br \/>\necho &#8216;\u6570\u5b57\u5927\u4e8e10\uff01&#8217;<br \/>\n}<br \/>\n\/\/\u7ed3\u679c\uff08\u672a\u88ab\u5904\u7406\uff09<\/p>\n<p>\u5404\u79cd\u6570\u503c\u7684\u6bd4\u8f83\u65b9\u6cd5<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&lt;<\/span>  <span class=\"c1\">\/\/\u53f3\u8fba\u306e\u5024\u306e\u65b9\u304c\u5927\u304d\u3044\u6642true<\/span>\r\n<span class=\"o\">&lt;=<\/span> <span class=\"c1\">\/\/\u53f3\u8fba\u306e\u5024\u306e\u65b9\u304c\u5927\u304d\u3044\u3001\u307e\u305f\u306f\u7b49\u3057\u3044\u6642true<\/span>\r\n<span class=\"o\">&gt;<\/span>  <span class=\"c1\">\/\/\u5de6\u8fba\u306e\u5024\u306e\u65b9\u304c\u5927\u304d\u3044\u6642true<\/span>\r\n<span class=\"o\">&gt;=<\/span> <span class=\"c1\">\/\/\u5de6\u8fba\u306e\u5024\u306e\u65b9\u304c\u5927\u304d\u3044\u3001\u307e\u305f\u306f\u7b49\u3057\u3044\u6642true<\/span>\r\n\r\n<span class=\"o\">==<\/span>\r\n<\/code><\/pre>\n<p>\u66f4\u65b0\u548c\u4fee\u6b63\u4e2d\u2026\u2026<\/p>\n<pre class=\"post-pre\"><code>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u5f00\u59cb\u6211\u4f1a\u5199\u4e0b\u81ea\u5df1\u5b66\u4e60\u7684\u5185\u5bb9\u3002\u57fa\u672c\u4e0a\u4f1a\u662f\u6211\u80fd\u7406\u89e3\u7684\u5185\u5bb9\uff0c\u8bf7\u591a\u5305\u6db5\u3002\u5982\u679c\u6709\u9519\u8bef\u7684\u5730\u65b9\uff0c\u8bf7\u5728\u8bc4\u8bba\u4e2d\u6307\u51fa\u3002 \u6709\u6807\u6709\u201c [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30730","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u57fa\u7840\u7b14\u8bb0\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u57fa\u7840\u7b14\u8bb0\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-30T21:20:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T12:32:56+00:00\" \/>\n<meta name=\"author\" content=\"\u9038, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u9038, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e5%9f%ba%e7%a1%80%e7%ac%94%e8%ae%b0\/\",\"name\":\"\u3010PHP\u3011\u57fa\u7840\u7b14\u8bb0 - Blog - Silicon 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