jQuery Validator Plugin - check for existing Username/Email in mysql database

Question

I\'ve successfully created a form that submits and adds users to a mysql database, and form validation with \'jQuery Validator\' plugin works great for everything except che

Answer 1

js code

username: {
        required: true,
        minlength: 5,
        remote: '/userExists'
       },

Php code to check if exist and return messages

public function userExists()
{
    $user = User::all()->lists('username');
    if (in_array(Input::get('username'), $user)) {
        return Response::json(Input::get('username').' is already taken');
    } else {
        return Response::json(Input::get('username').' Username is available');
    }
}