Jquery ajax success function returns null?

[eluser]BrianJM[/eluser]
Try serializing your data in JSON format. It looks like you may have already been doing that?

I'm not sure what the 3rd parameter of the response() function is for?

Code:

function domain_get() {
    $domain = $this->get('id');
    $result['domain'] = $domain;
    $this->response(json_encode($result), 200, 'data'); // 200 being the HTTP response code    
}

Code:

success: function(data, text, xhr){
    alert(data.domain);
}