public function actionDropFocus() { $courseId = Yii::$app->request->post('courseId'); $userId = Yii::$app->user->id; if (UserCourse::isFocus($userId, $courseId)) { if (UserCourse::deleteFocus($userId, $courseId, UserCourse::TYPE_FOCUS)) { echo true; return; } } else { echo true; return; } echo false; }