Transfer::transferLinkedSuppliers PHP Méthode

    function transferLinkedSuppliers($itemtype, $ID, $newID)
    {
        global $DB;
        switch ($itemtype) {
            case 'Ticket':
                $table = 'glpi_suppliers_tickets';
                $field = 'tickets_id';
                $link = new Supplier_Ticket();
                break;
            case 'Problem':
                $table = 'glpi_problems_suppliers';
                $field = 'problems_id';
                $link = new Problem_Supplier();
                break;
            case 'Change':
                $table = 'glpi_changes_suppliers';
                $field = 'changes_id';
                $link = new Change_Supplier();
                break;
        }
        $query = "SELECT *\n                FROM `{$table}`\n                WHERE `{$field}` = '{$ID}'";
        if ($result = $DB->query($query)) {
            if ($DB->numrows($result) != 0) {
                while ($data = $DB->fetch_assoc($result)) {
                    $input = array();
                    if ($data['suppliers_id'] > 0) {
                        $supplier = new Supplier();
                        if ($supplier->getFromDB($data['suppliers_id'])) {
                            $newID = -1;
                            $query = "SELECT *\n                               FROM `glpi_suppliers`\n                               WHERE `entities_id` = '" . $this->to . "'\n                                     AND `name` = '" . addslashes($supplier->fields['name']) . "'";
                            if ($result_search = $DB->query($query)) {
                                if ($DB->numrows($result_search) > 0) {
                                    $newID = $DB->result($result_search, 0, 'id');
                                }
                            }
                            if ($newID < 0) {
                                // 1 - create new item
                                unset($supplier->fields['id']);
                                $input = $supplier->fields;
                                $input['entities_id'] = $this->to;
                                // Not set new entity Do by transferItem
                                unset($supplier->fields);
                                $newID = $supplier->add(toolbox::addslashes_deep($input));
                            }
                            $input2['id'] = $data['id'];
                            $input2[$field] = $ID;
                            $input2['suppliers_id'] = $newID;
                            $link->update($input2);
                        }
                    }
                }
            }
        }
    }