/**
* Description:静态方法，单例访问统一入口
* @return Singleton：返回应用中的唯一对象实例
*/
public static function getInstance()
{
if (!self::$_instance instanceof self) {
self::$_instance = new self();
}
return self::$_instance;
}
public function select_row($sql, $bind = array())
{
$this->_link = Our_Mysql::getInstance();
return $this->_link->select_row($sql, $bind);
}
