code: public function getExceptionName($exception)
      {
          if ($exception instanceof \yii\base\Exception || $exception instanceof \yii\base\InvalidCallException || $exception instanceof \yii\base\InvalidParamException || $exception instanceof \yii\base\UnknownMethodException) {
              return $exception->getName();
          }
  
          return null;
      }
docs: Returns human-readable exception name.
  @param \Exception $exception
  @return string human-readable exception name or null if it cannot be determined