Toolbox::strpos PHP Méthode

    static function strpos($str, $tofound, $offset = 0)
    {
        return mb_strpos($str, $tofound, $offset, "UTF-8");
    }

 function reconstrucTimeline()
 {
     global $DB;
     $query = "TRUNCATE `" . $this->getTable() . "`";
     $DB->query($query);
     $query = "SELECT id\n               FROM `glpi_tickets`";
     $result = $DB->query($query);
     while ($data = $DB->fetch_array($result)) {
         $queryGroup = "SELECT * FROM `glpi_logs`";
         $queryGroup .= " WHERE `itemtype_link` = 'Group'";
         $queryGroup .= " AND `items_id` = " . $data['id'];
         $queryGroup .= " AND `itemtype` = 'Ticket'";
         $queryGroup .= " ORDER BY date_mod ASC";
         $resultGroup = $DB->query($queryGroup);
         if ($resultGroup) {
             while ($dataGroup = $DB->fetch_array($resultGroup)) {
                 if ($dataGroup['new_value'] != null) {
                     $start = Toolbox::strpos($dataGroup['new_value'], "(");
                     $end = Toolbox::strpos($dataGroup['new_value'], ")");
                     $length = $end - $start;
                     $groups_id = Toolbox::substr($dataGroup['new_value'], $start + 1, $length - 1);
                     $group = new Group();
                     if ($group->getFromDB($groups_id)) {
                         if ($group->fields['is_requester'] == 0 && $group->fields['is_assign'] == 1) {
                             $ticket = new Ticket();
                             $ticket->getFromDB($data['id']);
                             $this->createGroup($ticket, $dataGroup['date_mod'], $groups_id, 'new');
                         }
                     }
                 } else {
                     if ($dataGroup['old_value'] != null) {
                         $start = Toolbox::strpos($dataGroup['old_value'], "(");
                         $end = Toolbox::strpos($dataGroup['old_value'], ")");
                         $length = $end - $start;
                         $groups_id = Toolbox::substr($dataGroup['old_value'], $start + 1, $length - 1);
                         $group = new Group();
                         if ($group->getFromDB($groups_id)) {
                             if ($group->fields['is_requester'] == 0 && $group->fields['is_assign'] == 1) {
                                 $ticket = new Ticket();
                                 $ticket->getFromDB($data['id']);
                                 $this->createGroup($ticket, $dataGroup['date_mod'], $groups_id, 'delete');
                             }
                         }
                     }
                 }
             }
         }
     }
 }