PaymentController.php

<?php
namespace AppBundle/Controller;

class PaymentController extends Controller
{
    public function paymentAction($redurectUrl)
    {
        $form = $this->get('app.payment.form_handler')->generateForm($redirectUrl);

        return $this->render('AppBundle:Payment:form.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}