public function get_child($id_parent, $data)
 {
     global $dbh;
     global $pmb_nomenclature_record_children_link;
     $query = "select * from notices_relations where linked_notice='" . $id_parent . "' and relation_type='" . $pmb_nomenclature_record_children_link . "'";
     $result = pmb_mysql_query($query, $dbh);
     if (pmb_mysql_num_rows($result)) {
         while ($row = pmb_mysql_fetch_object($result)) {
             $child_id = $row->num_notice;
             $child = new nomenclature_record_child($child_id);
             $child_data = $child->get_data();
             if ($child_data["num_formation"] != $data["num_formation"]) {
                 continue;
             }
             if ($child_data["num_musicstand"] != $data["num_musicstand"]) {
                 continue;
             }
             if ($child_data["num_instrument"] != $data["num_instrument"]) {
                 continue;
             }
             if ($child_data["num_voice"] != $data["num_voice"]) {
                 continue;
             }
             if ($child_data["other"] != $data["other"]) {
                 continue;
             }
             if ($child_data["effective"] != $data["effective"]) {
                 continue;
             }
             if ($child_data["order"] != $data["order"]) {
                 continue;
             }
             return $child_id;
         }
     }
     return 0;
 }
 public static function get_index($id)
 {
     $record_child = new nomenclature_record_child($id);
     return $record_child->get_index();
 }