如何在php代码中获取以前url的值？

Question

How can i get the value of previous url in php code?

Here is the url page1.php

http://localhost/spk/kelulusan_process.php?lulus=10003

page2.php:
I want to get the parameter from the previous url in page1.php. I use

<?php 
$_GET['lulus'];
?>

But the value is null.

Answer 1

For $_GET to work you have to redirect user using form action

Or you can do that by setting session variables and access them any page