public static function getInstance(TPL &$tpl = null) { //判断self::$instance 是否已经被实例化 if (!self::$instance instanceof self) { self::$instance = new self(); } return self::$instance; }
public static function getInstance(TPL &$tpl = null) { if (!self::$instance instanceof self) { self::$instance = new self(); self::$instance->tpl = $tpl; } return self::$instance; }