common\models\Order::getPreferentialList PHP 메소드

    public static function getPreferentialList()
    {
        if (self::$_preferentialList === null) {
            self::$_preferentialList = [self::PREFERENTIAL_DOWN => '满减优惠', self::PREFERENTIAL_GIFT => '满送优惠', self::PREFERENTIAL_NONE => '未使用优惠'];
        }
        return self::$_preferentialList;
    }