User name format b24

public function getUserName($id)
    {
        $result = array();
        $id = (is_array($id) ? implode('|', $id) : $id);
        $r = CUser::GetList(($by="id"), ($order="asc"), array('ID' => $id), array('FIELDS' => array('ID', 'NAME', 'SECOND_NAME', 'LAST_NAME', 'LOGIN')));
        while ($u = $r->Fetch())
        {
            $result[$u['ID']] = CUser::FormatName(CSite::GetNameFormat(true), $u, true, true);
        }
        return count($result) > 0 ? $result : false;
    }