TP查询无限上级

代码:

  //无限上级
    public static function upLevel($user_id, $arr)
    {

        $parend_id = Db::table('user')->where('id', $user_id)->value('parend_id');

        array_push($arr, $parend_id);

        if ($parend_id != 1) {
            $arr = self::upLevel($parend_id, $arr);
        }

        return $arr;

    }