Fix CloudFlare case

Author: raspgot

AjaxForm.php

@@ -60,7 +60,7 @@
     $email   = filter_var(secure($_POST['email']), FILTER_SANITIZE_EMAIL) ?? statusHandler(true, HANDLER_MSG['enter_email']);
     $message = secure($_POST['message']) ?? statusHandler(true, HANDLER_MSG['enter_message']);
     $token   = secure($_POST['recaptcha-token']) ?? statusHandler(true, HANDLER_MSG['token-error']);
-    $ip      = filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP) ?? 'not displayed';
+    $ip      = filter_var($_SERVER['HTTP_CF_CONNECTING_IP'], FILTER_VALIDATE_IP) ?? filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP);
     $date    = new DateTime();
 }
 
@@ -79,7 +79,7 @@
 $recaptcha = new \ReCaptcha\ReCaptcha(SECRET_KEY);
 $resp = $recaptcha
     ->setExpectedHostname($_SERVER['SERVER_NAME'])
-    ->verify($token, $_SERVER['REMOTE_ADDR']);
+    ->verify($token, $ip);
 
 if ($resp->isSuccess()) {
     # Instanciation of PHPMailer