Created
February 24, 2019 21:50
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Verify google reCAPTCHA with PHP. Clean and universal function.
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<?php | |
/* | |
Decided to put this function as a gist itself, taken from this great comment | |
https://gist.github.com/jonathanstark/dfb30bdfb522318fc819#gistcomment-2733991 | |
*/ | |
function validate_rechapcha($response){ | |
// Verifying the user's response (https://developers.google.com/recaptcha/docs/verify) | |
$verifyURL = 'https://www.google.com/recaptcha/api/siteverify'; | |
// Collect and build POST data | |
$post_data = http_build_query( | |
array( | |
'secret' => 'YOUR_SITE_KEY', | |
'response' => $response, | |
'remoteip' => (isset($_SERVER["HTTP_CF_CONNECTING_IP"]) ? $_SERVER["HTTP_CF_CONNECTING_IP"] : $_SERVER['REMOTE_ADDR']) | |
) | |
); | |
// Send data on the best possible way | |
if(function_exists('curl_init') && function_exists('curl_setopt') && function_exists('curl_exec')) { | |
// Use cURL to get data 10x faster than using file_get_contents or other methods | |
$ch = curl_init($verifyURL); | |
curl_setopt($ch, CURLOPT_POST, 1); | |
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); | |
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); | |
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); | |
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); | |
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5); | |
curl_setopt($ch, CURLOPT_TIMEOUT, 5); | |
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json', 'Content-type: application/x-www-form-urlencoded')); | |
$response = curl_exec($ch); | |
curl_close($ch); | |
} else { | |
// If server not have active cURL module, use file_get_contents | |
$opts = array('http' => | |
array( | |
'method' => 'POST', | |
'header' => 'Content-type: application/x-www-form-urlencoded', | |
'content' => $post_data | |
) | |
); | |
$context = stream_context_create($opts); | |
$response = file_get_contents($verifyURL, false, $context); | |
} | |
// Verify all reponses and avoid PHP errors | |
if($response) { | |
$result = json_decode($response); | |
if ($result->success===true) { | |
return true; | |
} else { | |
return $result; | |
} | |
} | |
// Dead end | |
return false; | |
} |
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