    public static function regdate($id)
    {
        $usr = Db::result(
            sprintf(
                "SELECT * FROM `user` WHERE `id` = '%d' OR `userid` = '%s' LIMIT 1",
                Typo::int($id),
                Typo::cleanX($id)
            )
        );

        return $usr[0]->join_date;
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.