{"id":491,"date":"2020-04-22T17:20:59","date_gmt":"2020-04-22T09:20:59","guid":{"rendered":"https:\/\/fengyuwuzu.cn\/?p=491"},"modified":"2020-05-08T17:05:07","modified_gmt":"2020-05-08T09:05:07","slug":"php-%e5%b8%b8%e8%a7%81%e7%9a%84%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/fengyuwuzu.cn\/?p=491","title":{"rendered":"PHP \u5e38\u89c1\u7684\u8bbe\u8ba1\u6a21\u5f0f"},"content":{"rendered":"

\u5355\u4f8b\u6a21\u5f0f<\/h1>\n

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1\uff0e\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\u3002<\/p>\n

2\uff0e\u5fc5\u987b\u81ea\u884c\u521b\u5efa\u8fd9\u4e2a\u5b9e\u4f8b\u3002<\/p>\n

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\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528PHP\u5355\u4f8b\u6a21\u5f0f\uff1f<\/p>\n

PHP\u4e00\u4e2a\u4e3b\u8981\u5e94\u7528\u573a\u5408\u5c31\u662f\u5e94\u7528\u7a0b\u5e8f\u4e0e\u6570\u636e\u5e93\u6253\u4ea4\u9053\u7684\u573a\u666f\uff0c\u5728\u4e00\u4e2a\u5e94\u7528\u4e2d\u4f1a\u5b58\u5728\u5927\u91cf\u7684\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u9488\u5bf9\u6570\u636e\u5e93\u53e5\u67c4\u8fde\u63a5\u6570\u636e\u5e93\u7684\u884c\u4e3a\uff0c\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\u53ef\u4ee5\u907f\u514d\u5927\u91cf\u7684new\u64cd\u4f5c\u3002\u56e0\u4e3a\u6bcf\u4e00\u6b21new\u64cd\u4f5c\u90fd\u4f1a\u6d88\u8017\u7cfb\u7edf\u548c\u5185\u5b58\u7684\u8d44\u6e90\u3002<\/p>\n

class<\/span> Single {\r\n    <\/span>private<\/span> $name<\/span>;\/\/<\/span>\u58f0\u660e\u4e00\u4e2a\u79c1\u6709\u7684\u5b9e\u4f8b\u53d8\u91cf<\/span>\r\n    private<\/span> function<\/span> __construct(){\/\/<\/span>\u58f0\u660e\u79c1\u6709\u6784\u9020\u65b9\u6cd5\u4e3a\u4e86\u9632\u6b62\u5916\u90e8\u4ee3\u7801\u4f7f\u7528new\u6765\u521b\u5efa\u5bf9\u8c61\u3002<\/span>\r\n    }\r\n    <\/span>static<\/span> public<\/span> $instance<\/span>;\/\/<\/span>\u58f0\u660e\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\uff08\u4fdd\u5b58\u5728\u7c7b\u4e2d\u552f\u4e00\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff09<\/span>\r\n        static<\/span> public<\/span> function<\/span> getinstance(){\/\/<\/span>\u58f0\u660e\u4e00\u4e2agetinstance()\u9759\u6001\u65b9\u6cd5\uff0c\u7528\u4e8e\u68c0\u6d4b\u662f\u5426\u6709\u5b9e\u4f8b\u5bf9\u8c61<\/span>\r\n        if<\/span>(!self::$instance<\/span>) self::$instance<\/span> = new<\/span> self();\r\n            <\/span>return<\/span> self::$instance<\/span>;\r\n    }\r\n    <\/span>public<\/span> function<\/span> setname($n<\/span>){ $this<\/span>->name = $n<\/span>; }\r\n        <\/span>public<\/span> function<\/span> getname(){ return<\/span> $this<\/span>->name; }\r\n}\r\n<\/span>$oa<\/span> = Single::getinstance();\r\n<\/span>$ob<\/span> = Single::getinstance();\r\n<\/span>$oa<\/span>->setname('hello world');\r\n<\/span>$ob<\/span>->setname('good morning');\r\n<\/span>echo<\/span> $oa<\/span>->getname();\/\/<\/span>good morning<\/span>\r\necho<\/span> $ob<\/span>->getname();\/\/<\/span>good morning<\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u5355\u4f8b\u6a21\u5f0f \u5355\u4f8b\u6a21\u5f0f\u786e\u4fdd\u67d0\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u800c\u4e14\u81ea\u884c\u5b9e\u4f8b\u5316\u5e76\u5411\u6574\u4e2a\u7cfb\u7edf\u63d0\u4f9b\u8fd9\u4e2a\u5b9e\u4f8b\u3002 \u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u8bbe\u8ba1\u6a21 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[27],"class_list":["post-491","post","type-post","status-publish","format-standard","hentry","category-26","tag-27"],"yoast_head":"\nPHP \u5e38\u89c1\u7684\u8bbe\u8ba1\u6a21\u5f0f | \u98ce\u96e8\u65e0\u963bblog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fengyuwuzu.cn\/?p=491\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta 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