{"id":95,"date":"2012-11-14T13:53:28","date_gmt":"2012-11-14T05:53:28","guid":{"rendered":"http:\/\/www.yeetrack.com\/post\/2012-11-14\/php%25E5%258D%2595%25E4%25BE%258B%25E8%25AE%25BE%25E8%25AE%25A1%25E6%25A8%25A1%25E5%25BC%258F"},"modified":"2013-04-20T17:27:26","modified_gmt":"2013-04-20T09:27:26","slug":"php%e5%8d%95%e4%be%8b%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.yeetrack.com\/?p=95","title":{"rendered":"php\u5355\u4f8b\u8bbe\u8ba1\u6a21\u5f0f"},"content":{"rendered":"<p> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u5355\u4f8b\u6a21\u5f0f\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u4fdd\u8bc1\u5728\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u4e2d\uff0c\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u5b58\u5728\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u5355\u4f8b\u6a21\u5f0f\u5728\u521b\u5efa\u76ee\u5f55\u3001\u6570\u636e\u5e93\u8fde\u63a5\u4e2d\u5e94\u7528\u6bd4\u8f83\u591a\u3002\u800cphp\u6bcf\u6b21\u8bbf\u95ee\u90fd\u662f\u4e00\u6b21\u72ec\u7acb\u7684\u8fc7\u7a0b\uff0c\u5355\u4f8b\u6a21\u5f0f\u5c31\u66f4\u4e3a\u91cd\u8981\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre config=\"brush:php;toolbar:false;\">&lt;?php \n    \/**\n     * \u8fd9\u4e2a\u7c7b\u7528\u6765\u5c55\u793a\u5355\u4f8b\u6a21\u5f0f\n     * @author youthflies\n     *\/\n    class DB\n    {\n        private static $obj=null;\n                   \n        private function __construct()\n        {\n            echo &quot;\u8fde\u63a5\u6570\u636e\u5e93\u7b49\u8fc7\u7a0b&lt;br \/&gt;&quot;;\n        }\n                   \n        static function getInstance()\n        {\n            if(is_null(self::$obj))\n                self::$obj=new self();\n            return self::$obj;\n        }\n                   \n        public function query($sql)\n        {\n            echo &quot;\u6267\u884c\u6570\u636e\u5e93\u64cd\u4f5c: &quot; .$sql . &quot;&lt;br \/&gt;&quot;;\n        }\n    }\n               \n    $db = DB::getInstance();\n    $db -&gt; query(&quot;select username from user where userId=1&quot;);\n?&gt;<\/pre>\n<p> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DB\u7c7b\u7684\u6784\u9020\u51fd\u6570\u88ab\u58f0\u660e\u4e3aprivate\uff0c\u53ea\u80fd\u901a\u8fc7\u9759\u6001\u51fd\u6570getInstance\u6765\u65b0\u5efa\u5bf9\u8c61\uff0cgetInstance\u4e2d\u65b0\u5efa\u5bf9\u8c61\u65f6\uff0c\u5982\u679c\u68c0\u6d4b\u5230\u5b58\u5728\u7684DB\u5bf9\u8c61\u5c31\u76f4\u63a5\u8fd4\u56de\u8be5\u5bf9\u8c61\uff0c\u4fdd\u8bc1\u4e86\u8be5\u7c7b\u6700\u591a\u5b58\u5728\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u5355\u4f8b\u6a21\u5f0f\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u4fdd\u8bc1\u5728\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u4e2d\uff0c\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u5b58\u5728\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[33],"tags":[24,7],"class_list":["post-95","post","type-post","status-publish","format-standard","hentry","category-coding","tag-php","tag-7"],"views":2394,"_links":{"self":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=95"}],"version-history":[{"count":2,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/95\/revisions"}],"predecessor-version":[{"id":405,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/95\/revisions\/405"}],"wp:attachment":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=95"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=95"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=95"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}