How can i get a users membeship status with just PHP?

Hi,
I would like to use PHP to check if a user is a current paying member or get the ID of their membership package so i can verify if they are currently paying, is it possible to do this with just PHP?

I want to supply a username via PHP and then get the output returned as a variable if possible

How can i acheive this?

Hi Caesar,
I require to be able to check on my server without the user being logged in and without using the application, i am building custom script to check if user has subscription.

I need something like this:
<?php
username="testuser'
include("../amamber/library/Am/Lite.php");
Am_Lite::getInstance()->haveSubscriptions($testuser);
?>

Then yes or no is returned

did it with REST API
Thanks