{"id":30770,"date":"2023-06-22T11:00:06","date_gmt":"2024-02-05T00:32:10","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e8%af%ad%e6%b3%95%e7%ac%94%e8%ae%b0\/"},"modified":"2025-08-12T20:44:55","modified_gmt":"2025-08-12T12:44:55","slug":"php%e8%af%ad%e6%b3%95%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e8%af%ad%e6%b3%95%e7%ac%94%e8%ae%b0\/","title":{"rendered":"PHP\u8bed\u6cd5\u7b14\u8bb0"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u4e2a\u4eba\u5907\u5fd8\u5f55\u3002<\/p>\n<h1>\u53d8\u91cf\u5c55\u5f00<\/h1>\n<p>\u6211\u8ba4\u4e3a\u53ef\u4ee5\u50cf ${\u53d8\u91cf\u540d\u79f0} \u8fd9\u6837\u4f7f\u7528\u53d8\u91cf\u7684\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nv\">$i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span> <span class=\"nv\">$i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"err\">$<\/span><span class=\"p\">{<\/span><span class=\"s2\">\"num\"<\/span> <span class=\"mf\">.<\/span> <span class=\"nv\">$i<\/span><span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$i<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num0<\/span> <span class=\"mf\">.<\/span> <span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num1<\/span> <span class=\"mf\">.<\/span> <span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num2<\/span> <span class=\"mf\">.<\/span> <span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num3<\/span> <span class=\"mf\">.<\/span> <span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$num4<\/span> <span class=\"mf\">.<\/span> <span class=\"s2\">\"<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>0\r\n1\r\n2\r\n3\r\n4\r\n<\/code><\/pre>\n<p>\u6211\u60f3\u8868\u8fbe\u7684\u662f\u53ef\u4ee5\u7528\u53d8\u91cf\u6765\u8868\u793a\u53d8\u91cf\u540d\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<p>\u6211\u4e0d\u77e5\u9053\u5728\u54ea\u91cc\u4f7f\u7528\uff0c\u4f46\u8fd9\u611f\u89c9\u975e\u5e38\u5212\u65f6\u4ee3\uff0c\u6240\u4ee5\u6211\u505a\u4e86\u5907\u5fd8\u5f55\u3002<\/p>\n<h1>\u53c2\u7167\u6e21\u3057 &#8211; \u4f20\u5740\u8c03\u7528<\/h1>\n<p>\u5728PHP\u4e2d\uff0c\u662f\u901a\u8fc7\u5f15\u7528\u4f20\u9012\u5417\uff1f\u4e0eC\u8bed\u8a00\u7684\u611f\u89c9\u4e0d\u540c\uff0c\u6240\u4ee5\u6211\u603b\u7ed3\u4e86\u4e00\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n    <span class=\"k\">function<\/span> <span class=\"n\">double<\/span><span class=\"p\">(<\/span><span class=\"nv\">$n<\/span><span class=\"p\">){<\/span>\r\n        <span class=\"nv\">$n<\/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\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nf\">double<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">;<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>10\r\n<\/code><\/pre>\n<p>\u8fd9\u5c31\u662f\u6211\u611f\u89c9\u5230\u7684\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n    <span class=\"k\">function<\/span> <span class=\"n\">double<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nv\">$n<\/span><span class=\"p\">){<\/span>\r\n        <span class=\"nv\">$n<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nf\">double<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">;<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>20\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u4e5f\u5dee\u4e0d\u591a\u7b26\u5408\u611f\u89c9\u3002\u52a0\u4e0a\u300c&amp;\u300d\u7684\u4f4d\u7f6e\u548c\u611f\u89c9\u6709\u4e9b\u4e0d\u540c\u3002<\/p>\n<p>\u611f\u89ba\u4e0d\u540c\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n    <span class=\"k\">function<\/span> <span class=\"n\">double<\/span><span class=\"p\">(<\/span><span class=\"nv\">$n<\/span><span class=\"p\">){<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nv\">$i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span> <span class=\"nv\">$i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nv\">$n<\/span><span class=\"p\">[<\/span><span class=\"nv\">$i<\/span><span class=\"p\">]<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nf\">double<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nb\">var_dump<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n<span class=\"cp\">?&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>array(3) {\r\n  [0]=&gt;\r\n  int(1)\r\n  [1]=&gt;\r\n  int(2)\r\n  [2]=&gt;\r\n  int(3)\r\n}\r\n<\/code><\/pre>\n<p>\u6211\u4e4b\u524d\u4ee5\u4e3a\u6570\u7ec4\u662f\u6309\u5f15\u7528\u4f20\u9012\u7684\uff0c\u4f46\u4f3c\u4e4e\u4e0d\u5bf9\u3002<\/p>\n<p>\u4f7f\u7528foreach\u5faa\u73af\u800c\u4e0d\u662ffor\u5faa\u73af\u4f1a\u53d8\u5f97\u66f4\u52a0\u590d\u6742\u3002<\/p>\n<p>\u6211\u8bfb\u4e86\u4e0b\u9762\u7684\u5185\u5bb9\uff0c\u5bf9\u4e3a\u4ec0\u4e48\u4f1a\u53d8\u6210\u8fd9\u6837\u975e\u5e38\u7406\u89e3\u4e86\u3002<br \/>\n\u3010PHP\u8d85\u5165\u95e8\u3011\u5173\u4e8e\u503c\u7684\u8d4b\u503c\u548c\u503c\u4f20\u9012<br \/>\n\u3010PHP\u8d85\u5165\u95e8\u3011\u5173\u4e8e\u5f15\u7528\uff08reference\uff09\u7684\u8d4b\u503c<\/p>\n<h1>\u5076\u5947\u5224\u65ad\u80fd\u529b<\/h1>\n<p>\u56e0\u4e3a\u6211\u5bf9\u8fd9\u662f\u4ec0\u4e48\u4e1c\u897f\u611f\u5230\u56f0\u60d1\uff0c\u6240\u4ee5\u6211\u7559\u4e0b\u4e86\u5907\u5fd8\u5f55\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"o\">%<\/span><span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s2\">\"\u5947\u6570\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nv\">$a<\/span> <span class=\"o\">&amp;<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"s2\">\"\u5947\u6570\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u4e3a\u6211\u5bf9PHP\u4e2d\u7684\u4f4d\u8fd0\u7b97\u7b26\u7ecf\u9a8c\u4e0d\u8db3\uff0c\u6240\u4ee5\u4e00\u773c\u5c31\u770b\u4e0d\u61c2\u3002<\/p>\n<p>\u4ee5md\u8a13\u7df4\u70ba\u7531\u9032\u884c\u5b8c\u5168\u8907\u88fd\u64cd\u4f5c<br \/>\nhttps:\/\/www.php.net\/manual\/zh\/language.operators.bitwise.php<\/p>\n<div>\n<div class=\"post-table\">\u4f8b\u540d\u524d\u7d50\u679c\\$a &amp; \\$b\u8ad6\u7406\u7a4d\\$a \u304a\u3088\u3073 \\$b \u306e\u4e21\u65b9\u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30c3\u30c8\u304c\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\\$a \uff5c \\$b\u8ad6\u7406\u548c\\$a \u307e\u305f\u306f \\$b \u306e\u3069\u3061\u3089\u304b\u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30c3\u30c8\u304c\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\\$a ^ \\$b\u6392\u4ed6\u7684\u8ad6\u7406\u548c\\$a \u307e\u305f\u306f \\$b \u306e\u3069\u3061\u3089\u304b\u4e00\u65b9\u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u304a\u308a\u3001\u4e21\u65b9\u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u30d3\u30c3\u30c8\u304c\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059~ \\$a\u5426\u5b9a\\$a \u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u30d3\u30c3\u30c8\u306f\u30bb\u30c3\u30c8\u305b\u305a\u3001\u305d\u3046\u3067\u306a\u3044\u3082\u306e\u306f\u9006\u306b\u3057\u307e\u3059\\$a &lt;&lt; \\$b\u5de6\u30b7\u30d5\u30c8\\$a \u306e\u30d3\u30c3\u30c8\u3092\u5de6\u306b \\$b \u30d3\u30c3\u30c8\u30b7\u30d5\u30c8\u3059\u308b (\u5404\u30b7\u30d5\u30c8\u306f &#8220;2\u3092\u304b\u3051\u308b&#8221; \u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059)\\$a &gt;&gt; \\$b\u53f3\u30b7\u30d5\u30c8\\$a \u306e\u30d3\u30c3\u30c8\u3092\u53f3\u306b \\$b \u30d3\u30c3\u30c8\u30b7\u30d5\u30c8\u3057\u307e\u3059 (\u5404\u30b7\u30d5\u30c8\u306f &#8220;2\u3067\u5272\u308b&#8221; \u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059)<\/div>\n<\/div>\n<p>\u5728\u8868\u793a\u903b\u8f91\u548c\u8fd0\u7b97\u65f6\uff0c\u6211\u5728\u8868\u683c\u4e2d\u9047\u5230\u4e86\u56f0\u96be\u3002<br \/>\n\u53c2\u8003<br \/>\n\u901a\u8fc7\u5728Qiita\u7684\u5e16\u5b50\u4e2d\u8f6c\u4e49@\u7b26\u53f7<br \/>\n\u5782\u76f4\u7ebf<\/p>\n<h1>\u7ed3\u675f<\/h1>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u4e2a\u4eba\u5907\u5fd8\u5f55\u3002 \u53d8\u91cf\u5c55\u5f00 \u6211\u8ba4\u4e3a\u53ef\u4ee5\u50cf ${\u53d8\u91cf\u540d\u79f0} \u8fd9\u6837\u4f7f\u7528\u53d8\u91cf\u7684\u65b9\u6cd5\u3002 &lt;?php for ( [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30770","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\u8bed\u6cd5\u7b14\u8bb0 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP\u8bed\u6cd5\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\/php\u8bed\u6cd5\u7b14\u8bb0\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP\u8bed\u6cd5\u7b14\u8bb0\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8ePHP\u8bed\u6cd5\u7b14\u8bb0\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/php\u8bed\u6cd5\u7b14\u8bb0\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-05T00:32:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T12:44:55+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5b87, \u534e\" \/>\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\" 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