??$dbconfig=array( 'hostname'=>DB_HOST,//數(shù)據(jù)鏈接地址 'username'=>DB_USER,//鏈接數(shù)據(jù)用戶名 'password'=>DB_PWD,//鏈接數(shù)據(jù)密碼 'detabasc'=>DB_NAME,//鏈接數(shù)據(jù)庫(kù)名 'hostport'=>DB_PORT,//鏈接端口 'dbms'=>DB_TYPE,//鏈接類型是PDO鏈接還是MASQL鏈接 'dsn'=>DB_TYPE.":host=" .DB_HOST."; dbname =" .DB_USER //鏈接數(shù)據(jù)源 );if(empty($dbconfig['hostname'])){self::cuowtisi('請(qǐng)?zhí)顚憯?shù)據(jù)鏈接地址');exit;}??? ??? ? self::$config=$dbconfig;//如果鏈接地址不為空，就把配置數(shù)組信息保存到 類屬性數(shù)組里? ? if(empty(self::$config['params']))self::$config['params']=array();? ? ?? ? if(!isset(self::$link)){? ? ? ? $configs=self::$config;? ? var_dump($configs['detabasc']);//調(diào)試打印數(shù)據(jù)庫(kù)名? ? ? ? if(self::$chanlien){? ? ? ? ? ? $configs[params][constant("PDO::ATTR_PERSTENT")]=true; ? ? ? ? }? ? ? ? try{? ? ?self::$link=new PDO($configs['dsn'],$configs['detabasc'],$configs['password'],$configs['params']); 提示沒(méi)有選擇數(shù)據(jù)庫(kù)，明明選了的，錯(cuò)誤提示：string(16) "www_zhanwyu_com" Array ( [0] => 3D000 [1] => 1046 [2] => No database selected ) ?