public function actionQuiz($id) { $quiz = new Quiz(); $quiz->id = $id; if (Yii::$app->request->post()) { return $this->render('single_quiz', ['quizQuestion' => $quiz->getQuiz($id), 'result' => $quiz->getQuizResult(array_sum(Yii::$app->request->post('answers')))]); } return $this->render('single_quiz', ['quizQuestion' => $quiz->getQuiz($id)]); }