验证时回收错误代码'connection-failed'

Question

When implementing recaptcha v2, I am given the error code 'connection-failed' when trying to verify the recaptcha input.

I have followed this (https://www.freakyjolly.com/how-to-add-google-recaptcha-in-php-form/) tutorial as I had no luck with others that I found

    require('src/autoload.php');

    $siteKey = 'my key';
    $secret = 'my key';

    $recaptcha = new \ReCaptcha\ReCaptcha($secret);

    $gRecaptchaResponse = $_POST['g-recaptcha-response']; 
    $remoteIp = $_SERVER['REMOTE_ADDR']; 
    $recaptchaErrors = ''; 

    $resp = $recaptcha->verify($gRecaptchaResponse, $remoteIp);

    if ($resp->isSuccess()) {
        $error[] = "worked";
    } else {
        $recaptchaErrors = $resp->getErrorCodes(); 

        foreach($recaptchaErrors as $err)
        {
            $error[] = $err;
        }

    }

I have not had much luck finding any details on this error anywhere, and it is not documented on the official recaptcha page. I have edited the snippet above for testing purposes, but it would be sending an email.

Answer 1

I have had the same problem while working locally in a node environment running node-php-awesome-server. If you are trying to verify the reCaptcha response from localhost, with a localhost reCaptcha key pair, try from a live webserver (with relative key pair) instead. For some reason sending the request from localhost returned me that error. I suppose it has something to do with the development environment but did not investigate further.