public function perform_action()
 {
     $input = FWS_Props::get()->input();
     $locale = FWS_Props::get()->locale();
     $id_str = $input->get_predef(TDL_URL_IDS, 'get');
     $ids = FWS_Array_Utils::advanced_explode(',', $id_str);
     if (!FWS_Array_Utils::is_numeric($ids) || count($ids) == 0) {
         return TDL_GENERAL_ERROR;
     }
     // delete the entries
     foreach ($ids as $id) {
         $entry = new TDL_Objects_Entry(TDL_TB_ENTRIES);
         $entry->set_id($id);
         if (!$entry->check('delete')) {
             return $entry->errors();
         }
         $entry->delete();
     }
     $this->set_success_msg($locale->_('The entries have been deleted successfully'));
     $this->set_redirect(false);
     $this->set_action_performed(true);
     return '';
 }