public function actionFileDelete()
 {
     $request = Yii::$app->request;
     if ($request->isAjax) {
         Yii::$app->response->format = Response::FORMAT_JSON;
     }
     $file = BroadcastFiles::findOne($request->post('id'));
     unlink(Yii::getAlias('@backend/web') . preg_replace('/^' . addcslashes(Yii::$app->params['broadcast']['clearMngUrl'], '/') . '/', '', $file->file));
     BroadcastFiles::findOne($request->post('id'))->delete();
     return ['success' => true];
 }