file_get_content with no return - php

Question

I'm trying to implement reCAPTCHA in my website, everything seems working fine, except the return from file_get_contents().
Here is my code:
if ($_REQUEST["send"] == 1){
// access
$secretKey = 'my_key';
$captcha = $_POST['g-recaptcha-response'];
$ip = $_SERVER['REMOTE_ADDR'];
$response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".$secretKey."&response=".$captcha."&remoteip=".$ip);
$responseKeys = json_decode($response,true);
echo ($responseKeys);exit;
if(intval($responseKeys["success"]) !== 1) {
$message = 'Invalid reCAPTCHA';
} else {
$msg = 'content';
send_mail('send_to',"Subject",$msg);
header("location:index.php?send=1");exit;
}
}
My variable response is returning empty.
I tried to open https://www.google.com/recaptcha/api/siteverify? inserting manually the variables and it seems to work fine.
Am I forgeting something?
Thanks

Answer 1

Their API waiting for a POST request. Your code send GET request.
See answer here How to post data in PHP using file_get_contents?

Answer 2

My wrappers were disabled, reason why I couldn't reach the URL and get the return.
As I don't have access to php.ini the workaround was send the request with curl, here is the code:
$url = "https://www.google.com/recaptcha/api/siteverify?secret=".$secretKey."&response=".$captcha."&remoteip=".$ip;
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
if (curl_errno($ch)) {
echo curl_error($ch);
echo "\n<br />";
$response = '';
} else {
curl_close($ch);
}
if (!is_string($response) || !strlen($response)) {
echo "Failed to get contents.";
$contents = '';
}
$responseKeys = json_decode($response,true);