Item_Ticket::getUsedItems PHP Method

    static function getUsedItems($tickets_id)
    {
        $data = getAllDatasFromTable('glpi_items_tickets', " `tickets_id` = " . $tickets_id);
        $used = array();
        if (!empty($data)) {
            foreach ($data as $val) {
                $used[$val['itemtype']][] = $val['items_id'];
            }
        }
        return $used;
    }