ReCaptcha with ZF3 wrong value - zend-framework

Question

I use the newest Zend Framework available, and now i want to use ReCaptcha on my form. Together with some other elements, the ReCaptcha element is defined by:
$pubKey = 'replaced by the actual pubkey';
$privKey = 'replaced by the actual privkey';
$recaptcha = new \Zend\Captcha\ReCaptcha(['pubKey' => $pubKey, 'privKey' => $privKey]);
$this->add(array(
'attributes' => array (
'data-role' => 'none',
),
'name' => 'captcha',
'type' => 'captcha',
'options' => array(
'captcha' => $recaptcha,
),
));
This code validates the form in the controller:
public function contactAction () {
$contactForm = new ContactForm();
if($this->getRequest()->isPost()) {
$contactForm->setData($this->getRequest()->getPost());
if($contactForm->isValid()){
// send actual mail
return $this->redirect()->toRoute('page', ['lang' => $this->translator->getLocale(), 'page' => 'contact']);
}
}
$viewModel = new ViewModel ([
'contactForm' => $contactForm
]);
$viewModel->setTemplate('application/index/contact');
return $viewModel;
}
And finally, this is the view:
<?= $this->form($contactForm); ?>
To me, this code is pretty straightforward and should work. However, on sending the contact form, it displays the error 'Captcha value is wrong'. Any ideas?

Answer 1

You have to name the element according to the rules of Google. With this code, it works like a breeze
$pubKey = 'replaced by the actual pubkey';
$privKey = 'replaced by the actual privkey';
$recaptcha = new \Zend\Captcha\ReCaptcha(['pubKey' => $pubKey, 'privKey' => $privKey]);
$this->add(array(
'name' => 'g-recaptcha-response',
'type' => 'captcha',
'options' => [
'captcha' => $recaptcha,
]
));
Anyways, as always the ZF Docs are very short and lack examples.