Thread: NoCaptcha reCaptcha with ajax always fails

May I have some guidance on this issue please, totally lost so far. I am attempting to process my form via ajax on the backend using jQuery and it keeps failing. I tested the form and am receiving the post data, but each time it just fails. (I had tested this with normal processing and it worked, also I got it working clientside using "grecaptcha.getResponse()"--though am wondering how that works without the secret key?)

My AJAX:

Code:

 var request=$.ajax({
    url:'./includes/contact.php',
    type:'post',
    dataType:'html',
    data:$('#contact-form').serialize(),
    ...

And PHP:

PHP Code:

 require_once('../includes/recaptcha.php');
 $secret="...";
 $response=null;
 $reCaptcha=new ReCaptcha($secret);

 $response=$reCaptcha->verifyResponse($_SERVER['REMOTE_ADDR'],$_POST['g-recaptcha-response']);
 if($response!=null&&$response->success){
    echo "Thank you for submitting the form.";
  } else {
   echo "...FAIL...";
  }
  exit();