检查db然后使用Ajax重定向

Question

So it's my first time handling or rather using ajax and it still rattles my mind. I made this ajax function so when everytime I push a button it checks the value of something on db and if it's true then it should redirect. It works fine or rather redirect when I refresh the webpage but that isn't what I was expecting, I was expecting that if the value on the db being checked is "EQUAL TO" or True then it should redirect without me having to refresh the page just so it can do it's stuff. Hoping for some insights, thanks!

My home.php has this:

<script src="js/ajax.js"></script>

My Ajax JS:

$.ajax
({
    url: "testjax.php",
    type: "post",
    data: $('#Button').serialize(),
    dataType:'json',
    success: function (data) 
    {
        if (data.status=='SUCCESS')
        {
            window.location="/anotherdirectory/"; 
        }
        else 
        {}
    },
    error: function (e) {
        console.log('error:'+e);
    }
});

Testjax PHP

<?php
session_start();
require_once('path/sql.php');
require_once('path/who.php');

$userID = Who::LoggedUserID(); //Found in who.php
$userData = Who::GetUserData($userID);
$userPoints = $userData['points'];

if ($userPoints==0.00)
        {
            $tent='SUCCESS';
        }
        else
        {
            $tent='ERROR';
        }

        $ary=array("status"=>$tent);

        echo json_encode($ary);
?>