Confused as to why this isn't working. When the form is submitted I get the error message, meaning my recaptcha verification has failed.
From my form:
<div class="g-recaptcha" data-sitekey="(site-key)"></div>
PHP:
if(isset($_POST['g-recaptcha-response'])){
$captcha=$_POST['g-recaptcha-response'];
}
$secretKey = "(secret-key)";
$response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".$secretKey."&response=".$captcha);
$responseKeys = json_decode($response,true);
if(intval($responseKeys["success"]) === true) {
echo '<h3>Thanks for your message!</h3>';
} else {
echo '<h3>Error</h3>';
}
The reCaptcha documentation specifically specifies that the parameters for the request to https://www.google.com/recaptcha/api/siteverify must be sent via POST. You can use CURL for this.
$ch = curl_init();
curl_setopt_array($ch, [
CURLOPT_URL => 'https://www.google.com/recaptcha/api/siteverify',
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => [
'secret' => $secretKey,
'response' => $captcha,
'remoteip' => $_SERVER['REMOTE_ADDR']
],
CURLOPT_RETURNTRANSFER => true
]);
$output = curl_exec($ch);
curl_close($ch);
$json = json_decode($output);
// check response...
Don't use file_get_contents. Google suggests using POST requests.
You may use something in the lines of the following
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_URL => 'https://www.google.com/recaptcha/api/siteverify',
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => array(
'secret' => $secretKey,
'response' => $captcha
)
));
$response = curl_exec($curl);
curl_close($curl);
if(strpos($response, '"success": true') !== FALSE) {
echo '<h3>Thanks for your message!</h3>';
} else {
echo "<h3>Error</h3>";
}
EDIT
Yemiez answer (just got me at the corner) is better at handling the response part, by using the json_decode function.
EDIT just fixed a typo
if(isset($_POST['g-recaptcha-response'])){
$captcha=$_POST['g-recaptcha-response'];
}
$recaptcha_secret = '(secret-key)';
$response = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=".$recaptcha_secret."&response=".$captcha);
$response = json_decode($response, true);
if(!empty($response["success"]))
{
echo 'Thanks for your message!';
} else {
echo 'Error';
}