public static function Create($configname = 'db')
{
//避免重复创建连接
global $G_X;
if ($G_X[$configname]['dbtype'] == 'mssql') {
$sqltype = 'Pdo_Mssql';
} else {
$sqltype = 'Pdo_Mysql';
}
if (null === self::$dbCfg) {
self::$dbCfg = $configname;
}
//if (null === self::$db) {self::$db = new Pdo_Mysql($G_X[self::$dbCfg]);}
if ($configname !== self::$dbCfg) {
self::$dbCfg = $configname;
self::$db = new $sqltype($G_X[self::$dbCfg]);
} elseif (null === self::$db) {
self::$db = new $sqltype($G_X[self::$dbCfg]);
}
return self::$db;
}
