Whups::_prepareSort PHP Method

    protected static function _prepareSort(array $ticket)
    {
        $by = self::sortBy();
        $ticket['sort_by'] = array();
        if (is_array($by)) {
            foreach ($by as $field) {
                if (!isset($ticket[$field])) {
                    $ticket['sort_by'][$field] = '';
                } else {
                    $ticket['sort_by'][$field] = Horde_String::lower($ticket[$field], true, 'UTF-8');
                }
            }
        } else {
            if (!isset($ticket[$by])) {
                $ticket['sort_by'][$by] = '';
            } elseif (is_array($ticket[$by])) {
                natcasesort($ticket[$by]);
                $ticket['sort_by'][$by] = implode('', $ticket[$by]);
            } else {
                $ticket['sort_by'][$by] = Horde_String::lower($ticket[$by], true, 'UTF-8');
            }
        }
        return $ticket;
    }