Invisible recaptcha siteverify - error codes - php

Question

I'm trying to verify my $_POST['g-recaptcha-response'] on https://www.google.com/recaptcha/api/siteverify but i keep getting the following result:
"success": false,
"error-codes": [
"missing-input-response",
"missing-input-secret"
]
My code:
if($has_errors == false) {
$result = file_get_contents( 'https://www.google.com/recaptcha/api/siteverify', false, stream_context_create( array(
'http' => array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query( array(
'response' => $_POST['g-recaptcha-response'],
'secret' => variable_get('google_recaptcha_secret', '')
) ),
),
) ) );
var_dump($result);
$result = json_decode($result);
if($result->success == false) {
form_set_error('name', t('Submission blocked by Google Invisible Captcha.'));
}
}
I checked my variable google_recaptcha_secret, it is correct.

Answer 1

I've never seen file_get_contents used to post data like that, I'm not saying it's not possible but I would recommend trying with cURL:
if ($has_errors == false) {
$data = [
'response' => $_POST['g-recaptcha-response'],
'secret' => variable_get('google_recaptcha_secret', ''),
];
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, 'https://www.google.com/recaptcha/api/siteverify');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($curl, CURLOPT_TIMEOUT, 10);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
$result = curl_exec($curl);
$error = !$result ? curl_error($curl) : null;
curl_close($curl);
var_dump($result);
$result = json_decode($result);
if ($error || $result->success == false) {
form_set_error('name', t('Submission blocked by Google Invisible Captcha.'));
}
}