NotificationTarget::getSubjectPrefix PHP Method

    function getSubjectPrefix($event = '')
    {
        $perso_tag = trim(Entity::getUsedConfig('notification_subject_tag', $this->getEntity(), '', ''));
        if (empty($perso_tag)) {
            $perso_tag = "GLPI";
        }
        return "[{$perso_tag}] ";
    }

 function getSubjectPrefix($event = '')
 {
     if ($event != 'alertnotclosed') {
         return sprintf("[GLPI #%07d] ", $this->obj->getField('id'));
     }
     return parent::getSubjectPrefix();
 }