I am trying to create a login system using json like this $data_string = '{"email_address":"'.$semail.'","device_type":"WEB","password":"'.$spass.'","action":"signin"}';

I am using jQuery AJAX Call to PHP Script with JSON Return in a .js file i have. The problem i have is i dont want it to return json in ajax. i want to be able to decode my json return from php.

The problem lies in the ajax
$.ajax({
type: "POST",
dataType: "json",
url: "ajax.php",
data: data,
success: function(result){
// alert(result.responseCode);
if (result.responseCode == 'X1') {
// alert(result.responseMessage);
window.location.replace('index.php');
} else {
// Display result.responseMessage
alert(result.responseMessage);
}
}

I noticed extra lines of codes wont work in my php file. So i am looking for a way to post this without the success method

Am a little bit confused but are you trying to build Json data from the form input and send it to php?

If it's so then that is quite unnecessary. Just do a regular post/get to php and return Json from php to Ajax