/**
* 取得数据库类实例
* @static
* @access public
* @param mixed $config 连接配置
* @return Object 返回数据库驱动类
*/
public static function getInstance($config = array())
{
$md5 = md5(serialize($config));
if (!isset(self::$instance[$md5])) {
// 解析连接参数 支持数组和字符串
$options = self::parseConfig($config);
// 兼容mysqli
if ('mysqli' == $options['type']) {
$options['type'] = 'mysql';
}
self::$instance[$md5] = new Mysql($options);
}
self::$_instance = self::$instance[$md5];
return self::$_instance;
}
private static function createInstance()
{
$db = \config::$db;
$pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
self::$instance = new PDO($db['type'] . ':host=' . $db['host'] . ';dbname=' . $db['name'], $db['user'], $db['pass'], $pdo_options);
}
