{"id":30458,"date":"2023-11-26T16:41:30","date_gmt":"2023-10-24T14:30:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%aa%e4%ba%ba%e7%ac%94%e8%ae%b0-%e4%be%8b%e5%a6%82php\/"},"modified":"2025-08-12T19:15:42","modified_gmt":"2025-08-12T11:15:42","slug":"%e4%b8%aa%e4%ba%ba%e7%ac%94%e8%ae%b0-%e4%be%8b%e5%a6%82php","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%aa%e4%ba%ba%e7%ac%94%e8%ae%b0-%e4%be%8b%e5%a6%82php\/","title":{"rendered":"\u4e2a\u4eba\u7b14\u8bb0 (\u4f8b\u5982PHP)"},"content":{"rendered":"<p>\u4e5f\u53ef\u4ee5\u6dfb\u52a0\u5b66\u4e60\u5185\u5bb9\u7684\u540c\u65f6\u590d\u4e60PHP\u548cSQL\u7b49\u5185\u5bb9\u3002<br \/>\n\u7279\u522b\u662f\u9700\u8981\u8bb0\u4e0b\u6765\u7684\u4e8b\u60c5\u3002<br \/>\n\u5b66\u4e60\u4ee3\u7801\u5e93\u5728\u8fd9\u91cc\u3002<\/p>\n<p>\u52aa\u529b\u7684\u5927\u8c61\uff5e<\/p>\n<h1>PHP (Hypertext Preprocessor) is a widely-used open-source server-side scripting language that is especially suited for web development and can be embedded into HTML.<\/h1>\n<h3>\u901a\u7528\u7684\u4e8b\u60c5<\/h3>\n<p>\u5728\u53d8\u91cf\u5b9a\u4e49\u3001\u8d4b\u503c\u3001\u8f93\u51fa\u7b49\u4e4b\u540e\u5fc5\u987b\u59cb\u7ec8\u4f7f\u7528\u5206\u53f7\u201c;\u201d\u6807\u8bb0\uff0c\u5426\u5219\u4f1a\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n<p>\u5c06PHP\u6807\u7b7e\u63d2\u5165HTML\u4e2d\u3002<br \/>\n\u6709\u5173PHP\u6807\u7b7e\u7684\u8be6\u7ec6\u8bf4\u660e\u8bf7\u53c2\u9605\u5b98\u65b9\u7f51\u7ad9\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;?php\r\n    echo 'Hello';\r\n?&gt;\r\n<\/code><\/pre>\n<p>\u5728PHP\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528echo\u6807\u7b7e\u7684\u7f29\u5199\u5f62\u5f0f\u3002<\/p>\n<pre class=\"post-pre\"><code>\/\/ \u4ee5\u4e0b\u306f&lt;?php echo 'Hello'; ?&gt; \u3068\u540c\u3058\u610f\u5473\r\n&lt;?= 'Hello' ?&gt;\r\n<\/code><\/pre>\n<h3>\u5f53\u9700\u8981\u4ece\u5916\u90e8\u6587\u4ef6\u4e2d\u52a0\u8f7dPHP\u65f6\u3002<\/h3>\n<p>\u975e\u5e38\u597d\u6574\u7406\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5176\u4ed6\u53c3\u8003\u6587\u4ef6<\/p>\n<p>&nbsp;<\/p>\n<h3>\u8bc4\u8bba<\/h3>\n<p>\u4e3b\u8981\u6709\u4e09\u79cd<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/span>\r\n\r\n<span class=\"c1\"># \u5358\u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/span>\r\n\r\n<span class=\"cm\">\/*\r\n    \u8907\u6570\u884c\u306b\u308f\u305f\u3063\u3066\r\n    \u30b3\u30e1\u30f3\u30c8\u3092\u6b8b\u3059\u3053\u3068\u304c\u3067\u304d\u308b\r\n*\/<\/span>\r\n<\/code><\/pre>\n<h3>\u5904\u7406\u6570\u5b57<\/h3>\n<p>PHP\u56db\u5219\u8fd0\u7b97\u7684\u7b80\u5199<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ $count = $count + 10;<\/span>\r\n<span class=\"nv\">$count<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ $count = $count - 10;<\/span>\r\n<span class=\"nv\">$count<\/span> <span class=\"o\">-=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ $count = $count * 10;<\/span>\r\n<span class=\"nv\">$count<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ $count = $count \/ 10;<\/span>\r\n<span class=\"nv\">$count<\/span> <span class=\"o\">\/=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ $count = $count % 10;<\/span>\r\n<span class=\"nv\">$count<\/span> <span class=\"o\">%=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u589e\u52a0\u6216\u51cf\u5c11\u503c\u65f6\uff0c\u53ea\u6709\u5728\u7701\u7565\u5f62\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u3002<br \/>\n\u5728\u53d8\u91cf\u524d\u5199\u4e0a&#8221;++&#8221;\uff0c\u4f1a\u5728\u6267\u884c\u8be5\u884c\u6307\u4ee4\u4e4b\u524d\u589e\u52a0\uff0c\u800c\u5728\u53d8\u91cf\u540e\u9762\u5199\u4e0a&#8221;++&#8221;\uff0c\u4f1a\u5728\u6267\u884c\u8be5\u884c\u6307\u4ee4\u4e4b\u540e\u589e\u52a0\u3002\u51cf\u5c11\u503c\u65f6\u7684\u64cd\u4f5c\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ $x += 1<\/span>\r\n<span class=\"nv\">$x<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ $x -= 1<\/span>\r\n<span class=\"nv\">$x<\/span><span class=\"o\">--<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u5909\u6570\u306e\u524d\u3068\u5f8c\u306b\u66f8\u304f\u5834\u5408\u306e\u52d5\u4f5c\u306e\u9055\u3044<\/span>\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$b<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ echo\u304c\u5b9f\u884c\u3055\u308c\u308b\u524d\u306b+1\u3055\u308c\u308b<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"o\">++<\/span><span class=\"nv\">$a<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: 6<\/span>\r\n\r\n<span class=\"c1\">\/\/ echo\u304c\u5b9f\u884c\u3055\u308c\u305f\u5f8c\u306b+1\u3055\u308c\u308b<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$b<\/span><span class=\"o\">++<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: 5<\/span>\r\n<\/code><\/pre>\n<h3>\u5904\u7406\u5b57\u7b26\u4e32<\/h3>\n<p>\u5728\u4e2d\u6587\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u70b9\u53f7\u201c.\u201d\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u7684\u8fde\u63a5\u3001\u5b57\u7b26\u4e32\u4e4b\u95f4\u7684\u8fde\u63a5\u3001\u53d8\u91cf\u4e0e\u5b57\u7b26\u4e32\u7684\u8fde\u63a5\u4ee5\u53ca\u53d8\u91cf\u4e4b\u95f4\u7684\u8fde\u63a5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">echo<\/span> <span class=\"s1\">'Hello,'<\/span><span class=\"mf\">.<\/span><span class=\"s1\">'World!'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: Hello,World<\/span>\r\n\r\n<span class=\"nv\">$lang<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'PHP'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'Hello,'<\/span><span class=\"mf\">.<\/span><span class=\"nv\">$lang<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: Hello,PHP<\/span>\r\n\r\n<span class=\"nv\">$level<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'\u5165\u9580'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$lang<\/span><span class=\"mf\">.<\/span><span class=\"nv\">$level<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: PHP\u5165\u9580<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u300c.=\u300d\u53ef\u4ee5\u7701\u7565\u53d8\u91cf\u4e0e\u5b57\u7b26\u4e32\u7684\u8fde\u63a5\u800c\u76f4\u63a5\u4e66\u5199\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$name<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'\u5c71\u7530'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$name<\/span> <span class=\"mf\">.<\/span><span class=\"o\">=<\/span> <span class=\"s1\">'\u82b1\u5b50'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$name<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: \u5c71\u7530\u82b1\u5b50<\/span>\r\n<\/code><\/pre>\n<h3>\u53d8\u91cf\u5c55\u5f00<\/h3>\n<p>\u4f7f\u7528\u300c&#8221;&#8221;\u300d\u5c06\u5b57\u7b26\u4e32\u62ec\u8d77\u6765\u65f6\uff0c\u4e2d\u95f4\u7684\u53d8\u91cf\u53ef\u4ee5\u4f7f\u7528\u300c{}\u300d\u6765\u5305\u56f4\uff0c\u4ece\u800c\u5c06\u8be5\u90e8\u5206\u66ff\u6362\u4e3a\u53d8\u91cf\u7684\u503c\u3002\uff08\u53d8\u91cf\u5c55\u5f00\uff09<br \/>\n\u4f7f\u7528\u300c&#8221;\u300d\u5c06\u5b57\u7b26\u4e32\u62ec\u8d77\u6765\u65f6\uff0c\u4e0d\u4f1a\u8fdb\u884c\u53d8\u91cf\u5c55\u5f00\uff0c\u800c\u4f7f\u7528\u300c{}\u300d\u5305\u56f4\u7684\u90e8\u5206\u4f1a\u88ab\u89c6\u4e3a\u5b57\u7b26\u4e32\uff0c\u4fdd\u6301\u539f\u6837\u8f93\u51fa\u3002<br \/>\n\u8fd9\u4e0eRuby\u7684\u8868\u8fbe\u5f0f\u5c55\u5f00\u975e\u5e38\u76f8\u4f3c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$lang<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'PHP'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"s2\">\"\u6700\u8fd1\u3001<\/span><span class=\"si\">{<\/span><span class=\"nv\">$lang<\/span><span class=\"si\">}<\/span><span class=\"s2\">\u3092\u59cb\u3081\u307e\u3057\u305f\u3002\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: \u6700\u8fd1\u3001PHP\u3092\u59cb\u3081\u307e\u3057\u305f\u3002<\/span>\r\n\r\n<span class=\"k\">echo<\/span> <span class=\"s1\">'\u6700\u8fd1\u3001{$lang}\u3092\u59cb\u3081\u307e\u3057\u305f\u3002'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u7d50\u679c: \u6700\u8fd1\u3001{$lang}\u3092\u59cb\u3081\u307e\u3057\u305f\u3002<\/span>\r\n<\/code><\/pre>\n<h3>\u5982\u679c\u8fd9\u6837\u3002<\/h3>\n<blockquote><p>\u5f53 b \u5927\u4e8e a \u65f6\u4e3a\u771f<br \/>\n\u5f53 b \u5c0f\u4e8e a \u65f6\u4e3a\u771f<br \/>\n\u5f53 b \u5927\u4e8e\u6216\u7b49\u4e8e a \u65f6\u4e3a\u771f<br \/>\n\u5f53 b \u5c0f\u4e8e\u6216\u7b49\u4e8e a \u65f6\u4e3a\u771f<br \/>\n\u5f53 a \u7b49\u4e8e b \u65f6\u4e3a\u771f<br \/>\n\u5f53 a \u4e0d\u7b49\u4e8e b \u65f6\u4e3a\u771f<\/p><\/blockquote>\n<h3>\u5176\u4ed6\u60c5\u51b5\uff0c\u6216\u8005\u662f\u53e6\u5916\u4e00\u4e2a\u5982\u679c\u8bed\u53e5\u3002<\/h3>\n<p>\u4e0e\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u76f8\u6bd4\uff0c\u5b83\u7684\u4e0d\u540c\u5e76\u4e0d\u592a\u5927\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$x<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">30<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'$30\u3088\u308a\u5927\u304d\u3044'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">elseif<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$x<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"mi\">30<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'$x\u306f30\u4ee5\u4e0b20\u4ee5\u4e0a'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'$x\u306f20\u3088\u308a\u5c0f\u3055\u3044'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ \u7d50\u679c: $x\u306f30\u4ee5\u4e0b20\u4ee5\u4e0a<\/span>\r\n<\/code><\/pre>\n<h3>\u5426\u5b9a\u6761\u4ef6 (Negated condition)<\/h3>\n<p>\u300c!\u300d\u662f\u4e00\u79cd\u903b\u8f91\u8fd0\u7b97\u7b26\uff0c\u8868\u793a\u5426\u5b9a\u3002<br \/>\n\u5982\u679c\u8868\u8fbe\u5f0f\u4e3a\u771f\uff0c\u5219\u53d8\u4e3a\u5047\uff1b\u5982\u679c\u8868\u8fbe\u5f0f\u4e3a\u5047\uff0c\u5219\u53d8\u4e3a\u771f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"nv\">$x<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">20<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s1\">'$x\u306f20\u3067\u306f\u306a\u3044'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ \u7d50\u679c: $x\u306f20\u3067\u306f\u306a\u3044<\/span>\r\n<\/code><\/pre>\n<h3>\u8f6c\u6362\u8bed\u53e5<\/h3>\n<p>\u5982\u679c\u5206\u5c90\u6761\u4ef6\u8f83\u591a\u4e14\u5904\u7406\u903b\u8f91\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528switch\u8bed\u53e5\u6765\u66f4\u52a0\u6709\u6548\u5730\u5904\u7406\u3002<br \/>\n\u5f53switch\u8868\u8fbe\u5f0f\u5185\u7684case\u503c\u4e0e\u5339\u914d\u65f6\uff0c\u6267\u884c\u76f8\u5e94\u7684\u4ee3\u7801\u5757\u3002<br \/>\n\u5982\u679c\u6ca1\u6709\u4efb\u4f55case\u5339\u914d\u65f6\uff0c\u5219\u4f1a\u6267\u884cdefault\u4ee3\u7801\u5757\u3002<br \/>\n\u5728\u6bcf\u4e2acase\u4ee3\u7801\u5757\u4e2d\u4f7f\u7528break\u547d\u4ee4\u53ef\u4ee5\u9000\u51fa\u5f53\u524d\u4ee3\u7801\u5757\u3002<br \/>\n\u82e5\u5fd8\u8bb0\u7f16\u5199break\u547d\u4ee4\uff0c\u5219\u4f1a\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u4e2acase\u4ee3\u7801\u5757\uff0c\u56e0\u6b64\u9700\u8981\u6ce8\u610f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$count<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span>\r\n\r\n<span class=\"k\">switch<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$count<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"mi\">0<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"k\">echo<\/span> <span class=\"s1\">'0\u56de\u3067\u3059'<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"mi\">5<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"k\">echo<\/span> <span class=\"s1\">'5\u56de\u3067\u3059'<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"mi\">10<\/span><span class=\"o\">:<\/span> <span class=\"c1\">\/\/ \u6761\u4ef6\u3068\u4e00\u81f4\u3059\u308b\u305f\u3081\u3001\u3053\u3053\u304c\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n        <span class=\"k\">echo<\/span> <span class=\"s1\">'10\u56de\u3067\u3059'<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"k\">echo<\/span> <span class=\"s1\">'\u30a8\u30e9\u30fc\u3067\u3059\u3002'<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ \u7d50\u679c: 10\u56de\u3067\u3059<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e5f\u53ef\u4ee5\u6dfb\u52a0\u5b66\u4e60\u5185\u5bb9\u7684\u540c\u65f6\u590d\u4e60PHP\u548cSQL\u7b49\u5185\u5bb9\u3002 \u7279\u522b\u662f\u9700\u8981\u8bb0\u4e0b\u6765\u7684\u4e8b\u60c5\u3002 \u5b66\u4e60\u4ee3\u7801\u5e93\u5728\u8fd9\u91cc\u3002 \u52aa\u529b\u7684\u5927\u8c61\uff5e [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30458","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\/ 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