/**
  * @param int[] $params Deleted contact_id
  * @see waEventHandler::execute()
  * @return void
  */
 public function execute(&$params)
 {
     $contact_ids = $params;
     $photo_model = new photosPhotoModel();
     $photo_model->updateByField(array('contact_id' => $contact_ids), array('contact_id' => 0));
     wa()->event(array('photos', 'contacts_delete'), $params);
 }