I am working on a signup form with an integrated v2 reCAPTCHA and I ran into the issue that when submitting the form which includes the reCAPTCHA, it is reloading the page. I have a php function to validate the reCAPTCHA:
if (isset($_POST['g-recaptcha-response'])) {
function CheckCaptcha($userResponse) {
$fields_string = '';
$fields = array(
'secret' =>'secret_key',
'response' => $userResponse
);
foreach($fields as $key=>$value)
$fields_string .= $key . '=' . $value . '&';
$fields_string = rtrim($fields_string, '&');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/recaptcha/api/siteverify');
curl_setopt($ch, CURLOPT_POST, count($fields));
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, True);
$res = curl_exec($ch);
curl_close($ch);
return json_decode($res, true);
}
$result = CheckCaptcha($_POST['g-recaptcha-response']);
if ($result['success']) {
echo 'Success!';
} else {
echo 'Error';
}
}
When the form submits it gives a POST variable g-recaptcha-response
to the page it's on as there is no action
attribute to the form
So, I need to get the POST request but I can't let the page reload because that would get rid of other data on the page.
I tried using event.preventDefault();
when the form is submitted, but that also prevented the form from submitting the POST variable.
I have no idea how I would get the POST variable through javascript because the reCAPTCHA is not actually an input.
But if there was a way to get the value of the reCAPTCHA through javascript, then I could use ajax to send the POST request to the function.