PHP app\models Group::isValidGroup示例

 public function actionNew()
 {
     $request = Yii::$app->request;
     $user = new User();
     if ($request->isPost) {
         if ($user->load($request->post()) && $user->save()) {
             $role = (int) $request->post('role');
             if (Group::isValidGroup($role)) {
                 $groupMember = new GroupMember();
                 $groupMember->user_id = $user->id;
                 $groupMember->group_id = $role;
                 if ($groupMember->save()) {
                     return "<a class='auto-close'></a>";
                 }
             } else {
                 throw new CHttpException(404, 'Не съществува такава група!');
             }
         } else {
             return $this->renderPartial('new', ['user' => $user]);
         }
     }
     return $this->renderPartial('new', ['user' => $user]);
 }