php verify google recaptcha version 2

php-recaptcha.php

<?php

/**
 * Will make it work if server does not have
 * allow_url_fopen
 */
function fileGetContentsCurl($url)
{
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

    $data = curl_exec($ch);
    curl_close($ch);

    return $data;
}

/**
 * Build the captcha request URL
 */
function buildCaptchaUrl()
{
    $captcha = $_POST['g-recaptcha-response'];
    $secret = 'secret';
    return "https://www.google.com/recaptcha/api/siteverify?secret=$secret&response=" . $captcha . "&remoteip=" . $_SERVER['REMOTE_ADDR'];
}

/**
 * Sends the captcha and returns true on success - else false
 */
function sendCaptchaResponse()
{
    $response = json_decode(fileGetContentsCurl(buildCaptchaUrl()), true);
    if ($response['success'] == false) {
        return false;
    }
    return true;

}

@komputronika

Thanks 👍