Symfony\Component\Form\Form::isValid PHP Метод

    public function isValid()
    {
        if (!$this->isBound()) {
            throw new \LogicException('You cannot call isValid() on a form that is not bound.');
        }

        if ($this->hasErrors()) {
            return false;
        }

        if (!$this->readOnly) {
            foreach ($this->children as $child) {
                if (!$child->isValid()) {

                    return false;
                }
            }
        }

        return true;
    }

 /**
  * @param Form $form
  *
  * @return mixed
  * @throws \Exception
  * @throws \PaymentSuite\PaymentCoreBundle\Exception\PaymentException
  */
 private function processPaymentData(Form $form)
 {
     if ($form->isValid()) {
         $data = $form->getData();
         $paymentMethod = new AuthorizenetMethod();
         $paymentMethod->setCreditCartNumber($data['credit_cart'])->setCreditCartExpirationMonth($data['credit_cart_expiration_month'])->setCreditCartExpirationYear($data['credit_cart_expiration_year']);
         try {
             $this->get('authorizenet.manager')->processPayment($paymentMethod);
             $redirectUrl = $this->container->getParameter('authorizenet.success.route');
             $redirectAppend = $this->container->getParameter('authorizenet.success.order.append');
             $redirectAppendField = $this->container->getParameter('authorizenet.success.order.field');
         } catch (PaymentException $e) {
             /**
              * Must redirect to fail route
              */
             $redirectUrl = $this->container->getParameter('authorizenet.fail.route');
             $redirectAppend = $this->container->getParameter('authorizenet.fail.order.append');
             $redirectAppendField = $this->container->getParameter('authorizenet.fail.order.field');
             throw $e;
         }
     } else {
         /**
          * If form is not valid, fail return page
          */
         $redirectUrl = $this->container->getParameter('authorizenet.fail.route');
         $redirectAppend = $this->container->getParameter('authorizenet.fail.order.append');
         $redirectAppendField = $this->container->getParameter('authorizenet.fail.order.field');
     }
     $redirectData = $redirectAppend ? array($redirectAppendField => $this->get('payment.bridge')->getOrderId()) : array();
     $returnData['redirectUrl'] = $redirectUrl;
     $returnData['redirectData'] = $redirectData;
     return $returnData;
 }