src/Form/EventListener/ReCaptchaValidationListener.php line 30

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  1. <?php
  3. declare(strict_types=1);
  5. namespace App\Form\EventListener;
  7. use ReCaptcha\ReCaptcha;
  8. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  9. use Symfony\Component\Form\FormError;
  10. use Symfony\Component\Form\FormEvent;
  11. use Symfony\Component\Form\FormEvents;
  12. use Symfony\Component\HttpFoundation\Request;
  14. class ReCaptchaValidationListener implements EventSubscriberInterface
  15. {
  16.     private $reCaptcha;
  18.     public function __construct(ReCaptcha $reCaptcha)
  19.     {
  20.         $this->reCaptcha = $reCaptcha;
  21.     }
  23.     public static function getSubscribedEvents()
  24.     {
  25.         return [
  26.             FormEvents::POST_SUBMIT => 'onPostSubmit'
  27.         ];
  28.     }
  30.     public function onPostSubmit(FormEvent $event)
  31.     {
  32.         $request = Request::createFromGlobals();
  34.         $result = $this->reCaptcha
  35.             ->setExpectedHostname($request->getHost())
  36.             ->verify($request->request->get('g-recaptcha-response'), $request->getClientIp());
  38.         if (!$result->isSuccess()) {
  39.             $event->getForm()->addError(new FormError('The captcha is invalid. Please try again.'));
  40.         }
  41.     }
  42. }