{"id":74149,"date":"2024-02-26T14:11:53","date_gmt":"2024-02-26T06:11:53","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=74149"},"modified":"2024-02-26T14:12:06","modified_gmt":"2024-02-26T06:12:06","slug":"php%e4%b8%ad%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/74149.html","title":{"rendered":"PHP\u4e2d\u7684\u5355\u4f8b\u6a21\u5f0f\u5b9e\u73b0"},"content":{"rendered":"<p style=\"text-align:center;\" ><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-74150\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/02\/img-Bo5V63IdTjO0et7kxSfmuNw6.png?x-oss-process=image\/auto-orient,1\/format,webp\" width=\"600\" height=\"342\" alt=\"PHP\u4e2d\u7684\u5355\u4f8b\u6a21\u5f0f\u5b9e\u73b0\" \/><\/p>\n<p>\u6587\u7ae0\u5f00\u59cb\uff1a<\/p>\n<p><strong>\u5728PHP\u4e2d\uff0c\u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u76ee\u7684\u5728\u4e8e\u9650\u5236\u67d0\u4e2a\u7c7b\u53ea\u80fd\u751f\u4ea7\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u540c\u65f6\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee\u70b9\u3002<\/strong>\u5e94\u7528\u8fd9\u79cd\u6a21\u5f0f\uff0c\u53ef\u4ee5\u786e\u4fdd\u7c7b\u5728\u7a0b\u5e8f\u4e2d\u53ea\u5b58\u5728\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u4e0d\u540c\u7684\u7c7b\u5728\u8bbf\u95ee\u65f6\u8c03\u7528\u7684\u662f\u76f8\u540c\u7684\u5b9e\u4f8b\uff0c\u4ece\u800c\u8282\u7ea6\u7cfb\u7edf\u8d44\u6e90\u3001\u63d0\u9ad8\u6548\u7387\u3002<strong>\u8981\u5728PHP\u4e2d\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\uff0c\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\u521b\u5efa\u5355\u4f8b\u7c7b\u3001\u6784\u9020\u79c1\u6709\u5316\u3001\u514b\u9686\u79c1\u6709\u5316\u3001\u5b9e\u4f8b\u5316\u7684\u9759\u6001\u65b9\u6cd5\u521b\u5efa\u3001\u5168\u5c40\u8bbf\u95ee\u70b9\u7684\u5efa\u7acb\u7b49<\/strong>\u3002\u8fd9\u91cc\uff0c\u6211\u4eec\u7740\u91cd\u5c55\u5f00\u201c\u6784\u9020\u79c1\u6709\u5316\u201d\u7684\u90e8\u5206\u3002 <\/p>\n<p>\u5728PHP\u4e2d\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u65f6\uff0c\u5fc5\u987b\u5c06\u6784\u9020\u51fd\u6570\u8bbe\u4e3a\u79c1\u6709\u3002\u8fd9\u662f\u56e0\u4e3a\uff0c\u5982\u679c\u6784\u9020\u51fd\u6570\u662f\u516c\u6709\u7684\uff0c\u90a3\u4e48\u5916\u90e8\u7684\u4efb\u4f55\u4ee3\u7801\u90fd\u53ef\u4ee5\u901a\u8fc7new\u8c03\u7528\u6765\u5b9e\u4f8b\u5316\u5bf9\u8c61\uff0c\u90a3\u4e48\u5355\u4f8b\u6a21\u5f0f\u5c31\u65e0\u6cd5\u4fdd\u8bc1\u7c7b\u7684\u5b9e\u4f8b\u59cb\u7ec8\u53ea\u6709\u4e00\u4e2a\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u5c06\u6784\u9020\u51fd\u6570\u548c\u514b\u9686\u51fd\u6570\u90fd\u8bbe\u7f6e\u4e3a\u79c1\u6709\uff0c\u7981\u6b62\u4ece\u7c7b\u5916\u90e8\u8c03\u7528\u5b83\u4eec\u3002<\/p>\n<p>\u6b63\u6587\uff1a<\/p>\n<h2><strong>\u4e00\u3001SINGLETON PATTERN IN PHP<\/strong><\/h2>\n<p>\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u66f4\u6df1\u5165\u5730\u7406\u89e3\u4e00\u4e0b\u5355\u4f8b\u6a21\u5f0f\u3002\u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u8f6f\u4ef6\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u9650\u5236\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u7684\u8bbf\u95ee\u70b9\u6765\u8bbf\u95ee\u8fd9\u4e2a\u552f\u4e00\u5b9e\u4f8b\u3002\u5bf9\u4e8e\u6570\u636e\u5e93\u8fde\u63a5\u3001\u65e5\u5fd7\u64cd\u4f5c\u7b49\u9700\u8981\u9891\u7e41\u64cd\u4f5c\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u6bcf\u6b21\u4f7f\u7528\u90fd\u65b0\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f1a\u5927\u5927\u51cf\u4f4e\u7cfb\u7edf\u6027\u80fd\u3002\u6240\u4ee5\uff0c\u5355\u4f8b\u6a21\u5f0f\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u80fd\u53d1\u6325\u5b83\u7684\u4f18\u52bf\u3002<\/p>\n<h2><strong>\u4e8c\u3001IMPLEMENTATION OF SINGLETON PATTERN IN PHP<\/strong><\/h2>\n<p>\u90a3\u4e48\u5728PHP\u4e2d\uff0c\u5982\u4f55\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u5462\uff1f\u5176\u5b9e\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\u3002<\/p>\n<p>2.1 \u521b\u5efa\u5355\u4f8b\u7c7b<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u5e76\u5728\u5176\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u79c1\u6709\u7684\u9759\u6001\u5c5e\u6027\u6765\u4fdd\u5b58\u8be5\u7c7b\u7684\u5b9e\u4f8b\uff0c\u540c\u65f6\uff0c\u8be5\u7c7b\u4e2d\u8fd8\u9700\u8981\u6709\u4e00\u4e2a\u79c1\u6709\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u9632\u6b62\u5728\u7c7b\u7684\u5916\u90e8\u624b\u52a8\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n<p>2.2 \u6784\u9020\u79c1\u6709\u5316<\/p>\n<p>\u5982\u6211\u4eec\u524d\u6587\u6240\u8ff0\uff0c\u4e3a\u4e86\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u6211\u4eec\u9700\u8981\u5c06\u6784\u9020\u51fd\u6570\u8bbe\u4e3a\u79c1\u6709\u7684\u3002\u8fd9\u5c31\u786e\u4fdd\u4e86\u65e0\u6cd5\u5728\u7c7b\u7684\u5916\u90e8\u521b\u5efa\u5b83\u7684\u5bf9\u8c61\u3002\u540c\u6837\uff0c\u6211\u4eec\u4e5f\u9700\u8981\u8bbe\u5b9a\u4e00\u4e2a\u79c1\u6709\u7684\u514b\u9686\u65b9\u6cd5\uff0c\u9632\u6b62\u901a\u8fc7\u514b\u9686\u6765\u521b\u5efa\u65b0\u7684\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<p>2.3 \u5b9e\u4f8b\u5316\u7684\u9759\u6001\u65b9\u6cd5\u521b\u5efa<\/p>\n<p>\u5728\u5355\u4f8b\u7c7b\u4e2d\uff0c\u6211\u4eec\u8981\u521b\u5efa\u4e00\u4e2a\u516c\u6709\u7684\u9759\u6001\u51fd\u6570\u2014\u2014getInstance()\u3002\u8fd9\u4e2a\u51fd\u6570\u9996\u5148\u4f1a\u68c0\u67e5\u7c7b\u7684\u5b9e\u4f8b\u662f\u5426\u5df2\u7ecf\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5c31\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\u521b\u5efa\u3002\u8fd9\u5c31\u4fdd\u8bc1\u4e86\u6bcf\u6b21\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\uff0c\u90fd\u4f1a\u8fd4\u56de\u540c\u4e00\u4e2a\u5b9e\u4f8b\u3002<\/p>\n<p>2.4 \u5168\u5c40\u8bbf\u95ee\u70b9\u7684\u5efa\u7acb<\/p>\n<p>\u6700\u540e\u4e00\u6b65\uff0c\u5c31\u662f\u516c\u5f00\u5b9e\u4f8b\u7684\u5168\u5c40\u8bbf\u95ee\u70b9\uff0c\u4e5f\u5c31\u662fgetInstance()\u65b9\u6cd5\u3002\u8fd9\u6837\uff0c\u65e0\u8bba\u5728\u7a0b\u5e8f\u7684\u54ea\u4e2a\u5730\u65b9\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7\u5355\u4f8b\u7c7b\u540d::getInstance()\u7684\u65b9\u5f0f\uff0c\u6765\u83b7\u53d6\u6216\u8005\u4f7f\u7528\u8fd9\u4e2a\u5355\u4f8b\u5bf9\u8c61<\/p>\n<h2><strong>\u4e09\u3001PHP SINGLETON PATTERN EXAMPLE<\/strong><\/h2>\n<p>\u63a5\u4e0b\u6765\u901a\u8fc7\u4e00\u4e9bPHP\u4ee3\u7801\u5b9e\u4f8b\uff0c\u5177\u4f53\u6f14\u793a\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u5355\u4f8b\u6a21\u5f0f\u3002<\/p>\n<h2><strong>\u56db\u3001ADVANTAGES AND DISADVANTAGES OF SINGLETON PATTERN<\/strong><\/h2>\n<p>\u867d\u7136\u5355\u4f8b\u6a21\u5f0f\u5f88\u6709\u7528\uff0c\u4f46\u5b83\u5e76\u4e0d\u603b\u662f\u6700\u4f73\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8fd9\u4e00\u8282\u5c06\u8ba8\u8bba\u5355\u4f8b\u6a21\u5f0f\u7684\u4f18\u70b9\u548c\u7f3a\u70b9\u3002<\/p>\n<h2><strong>\u4e94\u3001CONCLUSION<\/strong><\/h2>\n<p>\u603b\u7684\u6765\u8bf4\uff0c\u5728PHP\u4e2d\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u9700\u8981\u5173\u6ce8\u7684\u4e3b\u8981\u6b65\u9aa4\u548c\u4e00\u4e9b\u9700\u8981\u8003\u8651\u7684\u95ee\u9898\u3002\u901a\u8fc7\u521b\u5efa\u5355\u4f8b\u7c7b\u3001\u6784\u9020\u79c1\u6709\u5316\u3001\u5b9e\u4f8b\u5316\u7684\u9759\u6001\u65b9\u6cd5\u521b\u5efa\u548c\u5168\u5c40\u8bbf\u95ee\u70b9\u7684\u5efa\u7acb\u7b49\u6b65\u9aa4\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u3002\u6700\u540e\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u8bb0\u4f4f\u5355\u4f8b\u6a21\u5f0f\u7684\u4f18\u70b9\u548c\u9002\u7528\u573a\u5408\uff0c\u4ee5\u53ca\u9700\u8981\u907f\u514d\u7684\u95ee\u9898\u3002<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u5982\u4f55\u5728PHP\u4e2d\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\uff1f<\/strong><\/p>\n<p>\u5728PHP\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u79c1\u6709\u7684\u9759\u6001\u5c5e\u6027\u6765\u4fdd\u5b58\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5e76\u901a\u8fc7\u516c\u5171\u7684\u9759\u6001\u65b9\u6cd5\u6765\u83b7\u53d6\u8fd9\u4e2a\u5b9e\u4f8b\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5b58\u5728\u3002\u4f8b\u5982\uff1a<\/p>\n<p>&#8220;`php<br \/>\nclass Singleton {<br \/>\n    private static $instance;<\/p>\n<p>    private function __construct() {<br \/>\n        \/\/ \u79c1\u6709\u6784\u9020\u51fd\u6570\uff0c\u9632\u6b62\u7c7b\u5916\u90e8\u5b9e\u4f8b\u5316<br \/>\n    }<\/p>\n<p>    public static function getInstance() {<br \/>\n        if (self::$instance === null) {<br \/>\n            self::$instance = new self();<br \/>\n        }<br \/>\n        return self::$instance;<br \/>\n    }<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p><strong>\u5355\u4f8b\u6a21\u5f0f\u6709\u4f55\u4f18\u52bf\uff1f<\/strong><\/p>\n<p>\u5355\u4f8b\u6a21\u5f0f\u53ef\u4ee5\u786e\u4fdd\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5b58\u5728\uff0c\u8fd9\u6837\u53ef\u4ee5\u8282\u7701\u7cfb\u7edf\u8d44\u6e90\uff0c\u907f\u514d\u91cd\u590d\u521b\u5efa\u5bf9\u8c61\u3002\u53e6\u5916\uff0c\u5355\u4f8b\u6a21\u5f0f\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee\u70b9\uff0c\u65b9\u4fbf\u5728\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8bbf\u95ee\u8fd9\u4e2a\u5b9e\u4f8b\u3002<\/p>\n<p><strong>\u5982\u4f55\u786e\u4fddPHP\u4e2d\u7684\u5355\u4f8b\u6a21\u5f0f\u7ebf\u7a0b\u5b89\u5168\uff1f<\/strong><\/p>\n<p>\u5728PHP\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728 `getInstance` \u65b9\u6cd5\u4e2d\u6dfb\u52a0\u52a0\u9501\u673a\u5236\u6765\u786e\u4fdd\u5355\u4f8b\u6a21\u5f0f\u7684\u7ebf\u7a0b\u5b89\u5168\u6027\u3002\u4f8b\u5982\uff1a<\/p>\n<p>&#8220;`php<br \/>\npublic static function getInstance() {<br \/>\n    if (self::$instance === null) {<br \/>\n        \/\/ \u4f7f\u7528\u4e92\u65a5\u9501\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168<br \/>\n        $mutex = new \\Mutex();<br \/>\n        $mutex->lock();<br \/>\n        if (self::$instance === null) {<br \/>\n            self::$instance = new self();<br \/>\n        }<br \/>\n        $mutex->unlock();<br \/>\n    }<br \/>\n    return self::$instance;<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>\u8fd9\u6837\u53ef\u4ee5\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u907f\u514d\u51fa\u73b0\u591a\u4e2a\u5b9e\u4f8b\u88ab\u521b\u5efa\u7684\u60c5\u51b5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u6587\u7ae0\u5f00\u59cb\uff1a \u5728PHP\u4e2d\uff0c\u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u76ee\u7684\u5728\u4e8e\u9650\u5236\u67d0\u4e2a\u7c7b\u53ea\u80fd\u751f\u4ea7\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u540c\u65f6\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee [&hellip;]","protected":false},"author":1,"featured_media":74152,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74149"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=74149"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74149\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/74152"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=74149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=74149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=74149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}