Cross Browser Request with JSONP and PHP

crossBrowserRequest.js

 $.ajax({
        type: 'GET',
        url: 'jsonpAnswer.php',
        data: {
            form: $(this).serialize()
        },
        dataType: 'jsonp',
        crossDomain: true,
    }).done(function(response){
        switch(response.type){
            case "invalidArgumentError" :
                break;

            case "internalError" :
                break;

            case "success": 
                 break;
        }
    }).fail(function(error){
        console.log(error.statusText);
    });

jsonpAnswer.php

//And server side answer 

<?php
  
  //Answer must be javascript application type
  header('Content-type: application/x-javascript');
  $formData = filter_input(INPUT_GET, "form", FILTER_DEFAULT);
  
  //to parse serialized information 
  parse_str($formData, $formFieldsCollection);
  
  //Make decisions I know this is hard stuff
  if(empty($formFieldsCollection['teste'])){
      echo $_GET['callback'] . '(' . "{'type' : 'invalidArgumentError' , 'response' : 'Argument not passed mother fucker!' }" . ')';
      exit; //Or return, or whatelse your framework could do
  }else{
    echo $_GET['callback'] . '(' . "{'type' : 'success' , 'response' : 'You was great doind this' }" . ')';
    exit;
  }
  
?>