{"id":30319,"date":"2023-07-04T18:30:16","date_gmt":"2023-01-07T09:00:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c-2\/"},"modified":"2025-08-12T18:36:51","modified_gmt":"2025-08-12T10:36:51","slug":"php%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e5%8f%82%e8%80%83%e6%89%8b%e5%86%8c-2\/","title":{"rendered":"PHP\u53c2\u8003\u624b\u518c"},"content":{"rendered":"<h2>\u9664\u4e86\u65e5\u6587 &#8220;\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9&#8221; \u5916\uff0c\u5bf9\u4e0b\u9762\u8fd9\u4e2a\u8bcd\u8fdb\u884c\u6c49\u8bed\u539f\u751f\u7684\u6539\u5199\u53ea\u9700\u8981\u7ed9\u51fa\u4e00\u4e2a\u9009\u9879\uff1a<\/h2>\n<p>\u30fb&#8221;\u53c2\u8003 &#8221; \u662f\u6307\u6307\u793a\u67d0\u4e2a\u503c\u7684\u4e1c\u897f\u3002<br \/>\n\u30fb\u6307\u793a\u5b58\u50a8\u53d8\u91cf\u7684\u7279\u5b9a\u503c\u7684\u5b58\u50a8\u533a\u57df\u7684\u53e6\u4e00\u4e2a\u540d\u5b57\u7684\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$b<\/span> <span class=\"o\">=&amp;<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">;<\/span> \r\n<span class=\"c1\">\/\/$a\u3068$b\u306f\u3001\u3069\u3061\u3089\u308210\u3068\u3044\u3046\u5024\u306e\u683c\u7d0d\u3055\u308c\u305f\u540c\u3058\u9818\u57df\u3092\u6307\u3057\u793a\u3059\u5909\u6570\u3002<\/span>\r\n<span class=\"c1\">\/\/$a \u304c $b \u3092 \u6307\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u9006\u3067\u3082\u306a\u3044\u3002<\/span>\r\n<\/code><\/pre>\n<h2>\u53d8\u91cf\u7684\u91cd\u65b0\u8d4b\u503c<\/h2>\n<p>\u5f53\u5411\u4e00\u4e2a\u53d8\u91cf\u7684\u5f15\u7528\uff0c\u5e76\u5c06\u503c\u5206\u914d\u7ed9\u5f15\u7528\u7684\u53d8\u91cf\u65f6\uff0c\u88ab\u5f15\u7528\u7684\u53d8\u91cf\u7684\u503c\u5c06\u88ab\u6539\u53d8\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$ref<\/span> <span class=\"o\">=&amp;<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nv\">$ref<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u53c2\u7167\u5909\u6570\u306e\u518d\u4ee3\u5165<\/span>\r\n<span class=\"k\">echo<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">,<\/span> <span class=\"kc\">PHP_EOL<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/20<\/span>\r\n<\/code><\/pre>\n<h2>\u6570\u7ec4\u7684\u53c2\u8003\u8d44\u6599<\/h2>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"c1\">\/\/\u5024\u6e21\u3057<\/span>\r\n<span class=\"nv\">$arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">foreach<\/span><span class=\"p\">(<\/span> <span class=\"nv\">$arr<\/span> <span class=\"k\">as<\/span> <span class=\"nv\">$v<\/span> <span class=\"p\">){<\/span>\r\n   <span class=\"nv\">$v<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> \r\n<span class=\"nb\">print_r<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span><span class=\"p\">);<\/span>\r\n<span class=\"cm\">\/*\r\nArray\r\n(\r\n    [0] =&gt; 1\r\n    [1] =&gt; 2\r\n    [2] =&gt; 3\r\n)\r\n*\/<\/span>\r\n\r\n<span class=\"c1\">\/\/\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u6e21\u3057<\/span>\r\n<span class=\"nv\">$arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">foreach<\/span><span class=\"p\">(<\/span> <span class=\"nv\">$arr<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">$v<\/span> <span class=\"p\">){<\/span>\r\n   <span class=\"nv\">$v<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> \r\n<span class=\"nb\">print_r<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span><span class=\"p\">);<\/span>\r\n<span class=\"cm\">\/*\r\nArray\r\n(\r\n    [0] =&gt; 2\r\n    [1] =&gt; 4\r\n    [2] =&gt; 6\r\n)\r\n*\/<\/span>\r\n<\/code><\/pre>\n<h2>\u53d6\u6d88\u5f15\u7528<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528unset()\u5c06\u53d8\u91cf\u7684\u503c\u9500\u6bc1\uff0c\u53ef\u4ee5\u53d6\u6d88\u5176\u5f15\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"nv\">$arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">foreach<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">$value<\/span><span class=\"p\">){<\/span>\r\n    <span class=\"nv\">$value<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nb\">unset<\/span><span class=\"p\">(<\/span><span class=\"nv\">$value<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/\u53c2\u7167\u306e\u89e3\u9664<\/span>\r\n\r\n<span class=\"nv\">$value<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1000<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nb\">print_r<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span><span class=\"p\">);<\/span>\r\n<span class=\"cm\">\/*\r\nArray\r\n(\r\n    [0] =&gt; 2\r\n    [1] =&gt; 4\r\n    [2] =&gt; 6\r\n)\r\n*\/<\/span>\r\n<\/code><\/pre>\n<h2>\u5982\u679c\u6ca1\u6709\u89e3\u9664\u5f15\u7528\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"nv\">$arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">foreach<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span> <span class=\"k\">as<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">$value<\/span><span class=\"p\">){<\/span>\r\n    <span class=\"nv\">$value<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nv\">$value<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1000<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nb\">print_r<\/span><span class=\"p\">(<\/span><span class=\"nv\">$arr<\/span><span class=\"p\">);<\/span>\r\n<span class=\"cm\">\/*\r\nArray\r\n(\r\n    [0] =&gt; 2\r\n    [1] =&gt; 4\r\n    [2] =&gt; 1000\r\n)\r\n*\/<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9664\u4e86\u65e5\u6587 &#8220;\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9&#8221; \u5916\uff0c\u5bf9\u4e0b\u9762\u8fd9\u4e2a\u8bcd\u8fdb\u884c\u6c49\u8bed\u539f\u751f\u7684\u6539\u5199\u53ea\u9700\u8981\u7ed9\u51fa\u4e00\u4e2a\u9009\u9879\uff1a \u30fb [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30319","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>PHP\u53c2\u8003\u624b\u518c - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP\u53c2\u8003\u624b\u518c\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\" 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