Custom Registration and Login Forms with reCaptcha 2 Validation

First connect the CAPTCHA script (add to: functions.php)

function onwp_enqueue_frontend() {
wp_enqueue_script('ha-recaptcha', 'https://www.google.com/recaptcha/api.js', array('jquery'), '1.0', true);
}
add_action('wp_enqueue_scripts', 'onwp_enqueue_frontend');

In the form of adding the following html code to display the captcha

<div class="g-recaptcha" data-sitekey="YOU_SITE_CODE"></div>

YOU_SITE_CODE – replaced by your code

Next, add the CAPTCHA validation feature

$recaptcha = $_POST['data']['g_recaptcha_response'];
 if (!empty($recaptcha)) {
 $google_url = "https://www.google.com/recaptcha/api/siteverify";
 $secret="YOU_SECRET_CODE";
 $ip = $_SERVER['REMOTE_ADDR'];
 $url = $google_url . "?secret=" . $secret . "&response=" . $recaptcha . "&remoteip=" . $ip;
 $res = onwp_getCurlData($url);
 $res = json_decode($res, true);
 //reCaptcha введена
 if (empty($res['success'])) {
 // Error, please enter the captcha again
 } else {
// all passed successfully perform your actions
}
 } else {
 // Error, please enter the captcha again
 }

YOU_SECRET_CODE – replaced by your code

Function executes the query(add to functions.php):

function onwp_getCurlData($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 10);
curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16");
$curlData = curl_exec($curl);
curl_close($curl);
return $curlData;
}

Related Posts: