{"id":30725,"date":"2023-08-12T05:16:04","date_gmt":"2023-01-27T21:44:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e9%87%8a%e6%94%be%e5%86%85%e5%ad%98%e7%9a%84%e6%9d%a1%e4%bb%b6\/"},"modified":"2025-08-12T20:31:26","modified_gmt":"2025-08-12T12:31:26","slug":"%e3%80%90php%e3%80%91%e9%87%8a%e6%94%be%e5%86%85%e5%ad%98%e7%9a%84%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e9%87%8a%e6%94%be%e5%86%85%e5%ad%98%e7%9a%84%e6%9d%a1%e4%bb%b6\/","title":{"rendered":"\u3010PHP\u3011\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6"},"content":{"rendered":"<h1>\u5185\u5b58\u7684\u5b9a\u4e49\u662f<\/h1>\n<p>\u5185\u5b58\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u8bbe\u5907\uff0c\u7528\u4e8e\u5b58\u50a8\u7a0b\u5e8f\u548c\u6570\u636e\u3002<br \/>\n\u867d\u7136\u7ecf\u5e38\u88ab\u7c7b\u6bd4\u4e3a\u684c\u5b50\uff0c\u4f46\u5982\u679c\u4e0d\u91ca\u653e\u5185\u5b58\u4e2d\u7684\u4e0d\u5fc5\u8981\u6570\u636e\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u9519\u8bef\u3002<\/p>\n<p>\u4e3a\u4e86\u91ca\u653e\u90a3\u4e9b\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\uff0c\u7b80\u8981\u603b\u7ed3\u5982\u4e0b\u3002<\/p>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u7684\u53c2\u8003\u8d44\u6599\u5728\u4e0b\u65b9\u2193<\/p>\n<p>&nbsp;<\/p>\n<h1>\u5185\u5b58\u91ca\u653e\u7684\u6761\u4ef6\uff08\u53d8\u91cf\uff09<\/h1>\n<p>\u53ea\u8981\u53d8\u91cf\u7684\u6570\u636e\u6ca1\u6709\u88ab\u91ca\u653e\uff0c\u5b83\u5c06\u7ee7\u7eed\u5b58\u7559\u5728\u5185\u5b58\u4e2d\u3002<\/p>\n<p>\u25ce\u83b7\u5f97\u89e3\u653e\u7684\u6761\u4ef6\u5982\u4e0b\u6240\u793a\u2193<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u300c\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u306e\u53c2\u7167\u304c\u4e00\u3064\u7121\u52b9\u306b\u306a\u308b\u300d\u6642\u3001zval\u306e\u53c2\u7167\u30ab\u30a6\u30f3\u30c8(zval\u306erefcount)\u3092-1\u3057\u305f\u7d50\u679c\u30010\u3067\u3042\u308c\u3070\u30c7\u30fc\u30bf\u306f\u30e1\u30e2\u30ea\u304b\u3089\u6d88\u6ec5\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Garbage Collection Cycle\u306e\u7d50\u679c\u3001\u53c2\u7167\u30ab\u30a6\u30f3\u30c8\u304c0\u3067\u3042\u308c\u3070\u3001\u30c7\u30fc\u30bf\u306f\u30e1\u30e2\u30ea\u304b\u3089\u6d88\u6ec5\u3059\u308b\u3002<\/ul>\n<p>\u8bf7\u53c2\u9605\u5148\u524d\u63d0\u4f9b\u7684\u94fe\u63a5\u4ee5\u83b7\u53d6\u8be6\u7ec6\u4fe1\u606f\uff01<\/p>\n<div>\u55ef\uff0c\u5c06\u5df2\u5b9a\u4e49\u7684\u53d8\u91cf\u5168\u90e8\u4f7f\u7528\u5b8c\u6bd5\u540e&#8230; \u5c31\u597d\u50cf\u8fd9\u6837\u53bb\u7406\u89e3\u3002<\/div>\n<h3>1) \u53d8\u91cf\u6709\u6548\u8303\u56f4\u7684\u6d88\u5931<\/h3>\n<p>\u5f53\u53d8\u91cf\u9003\u79bb\u53ef\u4f7f\u7528\u7684\u8303\u56f4\u65f6\uff0c\u968f\u7740\u6709\u6548\u8303\u56f4\u7684\u6d88\u5931\uff0c\u53d8\u91cf\u5c06\u88ab\u91ca\u653e\uff0c\u5b9e\u9645\u6570\u636e\u7684\u5f15\u7528\u4e5f\u5c06\u53d8\u5f97\u65e0\u6548\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$local<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'a'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/$local\u306f\u3001function{}\u306e\u7bc4\u56f2\u5185\u3067\u6709\u52b9\u3067\u3059\u3002<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ \u95a2\u6570\u306e\u9042\u884c\u304c\u5408\u308f\u3063\u305f\u3042\u3068\u3001a\u95a2\u6570\u5185\u306e$local\u306f\u81ea\u52d5\u7684\u306b\u89e3\u9664\u3055\u308c\u307e\u3059\u3002<\/span>\r\n<\/code><\/pre>\n<h3>2) \u53d6\u6d88\u660e\u786e\u7684\u53d8\u91cf\u7b26\u53f7(unset)<\/h3>\n<p>\u5728php\u4e2d\uff0c\u6709\u4e00\u4e2a\u540d\u4e3aunset()\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u663e\u5f0f\u91ca\u653e\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">unset<\/span><span class=\"p\">(<\/span><span class=\"err\">\uff04<\/span><span class=\"n\">local<\/span><span class=\"p\">)<\/span> <span class=\"o\">:<\/span> <span class=\"n\">void<\/span>\r\n<\/code><\/pre>\n<h3>3) \u91cd\u65b0\u8bbe\u7f6e\u53d8\u91cf\u7b26\u53f7\u7684\u5f15\u7528<\/h3>\n<p>\u5f53\u53d8\u91cf\u7b26\u53f7\u7684\u5f15\u7528\u88ab\u91cd\u65b0\u5b9a\u4e49\u65f6\uff0c\u5148\u524d\u7684\u5f15\u7528\u5c06\u4f1a\u53d8\u4e3a\u65e0\u6548\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">array<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">array<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/\u3053\u306e\u6642\u3001$a\u306e\u5909\u6570\u306e\u53c2\u7167\u304carray(1)\u306b\u4e0a\u66f8\u304d\u3055\u308c\u3001array(0)\u306b\u5bfe\u3059\u308b\u53c2\u7167\u306f\u7121\u52b9\u306b\u306a\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<h1>\u5185\u5b58\u65e0\u6cd5\u91ca\u653e\u7684\u6761\u4ef6<\/h1>\n<ul class=\"post-ul\">\u300c\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u306e\u53c2\u7167\u304c\u4e00\u3064\u7121\u52b9\u306b\u306a\u308b\u300d\u6642\u3001\u53c2\u7167\u30ab\u30a6\u30f3\u30c8(refcount)\u304c\u300c1\u4ee5\u4e0a\u300d\u3067\u3042\u308c\u3070\u3001\u30c7\u30fc\u30bf\u306f\u6d88\u6ec5\u305b\u305a\u306b\u6b8b\u308a\u7d9a\u3051\u308b\u3002<\/ul>\n<h3>1) \u5982\u679c\u5728\u76f8\u540c\u7684\u8303\u56f4\u5185\u5b58\u5728\u5f15\u7528\u76f8\u540c\u6570\u636e\u7684\u53d8\u91cf\u3002<\/h3>\n<p>\u5f53\u5728\u540c\u4e00\u4e2a\u51fd\u6570\u6216\u8303\u56f4\u5185\u5b58\u5728\u591a\u4e2a\u5f15\u7528\u76f8\u540c\u6570\u636e\u7684\u53d8\u91cf\u65f6\uff0c\u5373\u4f7f\u67d0\u4e2a\u53d8\u91cf\u88ab\u91ca\u653e\uff0c\u6570\u636e\u4e5f\u4e0d\u4f1a\u6d88\u5931\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">array<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nv\">$b<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$a<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">unset<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span> \r\n<span class=\"nb\">var_dump<\/span><span class=\"p\">(<\/span><span class=\"nv\">$b<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/$a\u306e\u5909\u6570\u3092\u89e3\u9664\u3057\u3066\u3082\u3001$b\u304carray(0)\u306e\u53c2\u7167\u3092\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u6d88\u6ec5\u3057\u306a\u3044\u3002 <\/span>\r\n<\/code><\/pre>\n<h3>2\uff09\u5982\u679c\u5728\u4e0d\u540c\u7684\u4f5c\u7528\u57df\u4e2d\u5b58\u5728\u5f15\u7528\u76f8\u540c\u6570\u636e\u7684\u53d8\u91cf\u3002<\/h3>\n<p>\u5982\u679c\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u4f20\u9012\uff0c\u5219\u7531\u4e8e\u4ecd\u7136\u5728\u4e0a\u5c42\u4f5c\u7528\u57df\u4e2d\u5f15\u7528\u6570\u636e\uff0c\u5373\u4f7f\u4ece\u5f53\u524d\u4f5c\u7528\u57df\u89e3\u9664\u53d8\u91cf\u7ed1\u5b9a\uff0c\u6570\u636e\u4e5f\u4e0d\u4f1a\u6d88\u5931\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"kt\">object<\/span> <span class=\"nv\">$obj<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unset<\/span><span class=\"p\">(<\/span><span class=\"nv\">$obj<\/span><span class=\"p\">);<\/span> \r\n    <span class=\"c1\">\/\/\u73fe\u5728\u306e\u30b9\u30b3\u30fc\u30d7\u306e$obj\u306b\u5bfe\u3059\u308b\u53c2\u7167\u306f\u89e3\u653e\u3055\u308c\u308b\u3002<\/span>\r\n    <span class=\"c1\">\/\/\u3057\u304b\u3057\u3001\u4e0a\u4f4d\u30b9\u30b3\u30fc\u30d7\u306b\u3044\u308b$a\u306e\u5909\u6570\u306e\u53c2\u7167\u304c\u307e\u3060\u6709\u52b9\u306a\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306f\u6d88\u6ec5\u3057\u306a\u3044\u3002<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">array<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/\u3000\u3053\u306earray(0)\u306f\u6b8b\u3063\u3066\u3044\u308b\u3002<\/span>\r\n<span class=\"nf\">sampleFunc<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h3>\u5728\u590d\u5408\u7c7b\u578b\u53d8\u91cf\u7684\u5185\u90e8\uff0c\u5982\u679c\u6709\u53d8\u91cf\u5f15\u7528\u76f8\u540c\u7684\u6570\u636e<\/h3>\n<p>\u6570\u7ec4\u3001\u5bf9\u8c61\u7b49\u590d\u5408\u7c7b\u578b\u53ef\u4ee5\u6301\u6709\u6570\u636e\u7684\u5f15\u7528\u3002<br \/>\n\u5f53\u5728\u5185\u90e8\u5f15\u7528\u6570\u636e\u65f6\uff0c\u6570\u636e\u4e0d\u4f1a\u6d88\u5931\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">function<\/span> <span class=\"n\">x<\/span><span class=\"p\">(<\/span><span class=\"kt\">object<\/span> <span class=\"nv\">$obj<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$data<\/span> <span class=\"o\">=<\/span> <span class=\"k\">array<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span> \r\n\r\n    <span class=\"nv\">$obj<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">data<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$data<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"c1\">\/\/$data\u306f\u3001x\u95a2\u6570\u306e\u9042\u884c\u5f8c\u306b\u89e3\u9664\u3055\u308c\u307e\u3059\u304c\u3001stdClass\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3068\u3057\u3066\u3001array(0)\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u3001\u30c7\u30fc\u30bf\u306f\u6d88\u6ec5\u3057\u307e\u305b\u3093\u3002<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nv\">$a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">\\stdClass<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nf\">x<\/span><span class=\"p\">(<\/span><span class=\"nv\">$a<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u6700\u540e<\/h1>\n<p>\u901a\u8fc7\u7406\u89e3\u5185\u5b58\u6982\u5ff5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5904\u7406\u6570\u636e\uff0c\u56e0\u6b64\u6211\u60f3\u8981\u5b66\u4e60\u5b83\u3002<br \/>\n\u53e6\u5916\uff0c\u4e5f\u4f1a\u6574\u7406\u5173\u4e8e\u5185\u5b58\u6cc4\u6f0f\u548c\u5783\u573e\u56de\u6536\u7684\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5185\u5b58\u7684\u5b9a\u4e49\u662f \u5185\u5b58\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u8bbe\u5907\uff0c\u7528\u4e8e\u5b58\u50a8\u7a0b\u5e8f\u548c\u6570\u636e\u3002 \u867d\u7136\u7ecf\u5e38\u88ab\u7c7b\u6bd4\u4e3a\u684c\u5b50\uff0c\u4f46\u5982\u679c\u4e0d\u91ca\u653e\u5185\u5b58\u4e2d\u7684\u4e0d\u5fc5\u8981\u6570\u636e [&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-30725","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\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6\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\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010PHP\u3011\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u91ca\u653e\u5185\u5b58\u7684\u6761\u4ef6\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" 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