Google ReCaptcha v2 PHP Code

google-recaptcha-v2-php-code

// Add in to HTML where you want the box to be

<script src='https://www.google.com/recaptcha/api.js' async defer></script>
<div class="captcha_wrapper">
	<div class="g-recaptcha" data-sitekey="YOUR_PUBLIC_KEY"></div>
</div>

// Add into PHP validation to check the submitted captcha response is a success or fail

/* Google ReCaptcha Verification */
$url = 'https://www.google.com/recaptcha/api/siteverify';
$privatekey = "YOUR_PRIVATE_KEY";
$response = file_get_contents($url."?secret=".$privatekey."&response=".$_POST['g-recaptcha-response']."&remoteip=".$_SERVER['REMOTE_ADDR']);
$data = json_decode($response);

if (isset($data->success) AND $data->success==true)
{
    // Do Success Stuff!
}
else
{
    // Do Fail Stuff!
}