What steps can the user take to debug the issue of session variables being reset on each page reload in PHP?

Issue: Session variables being reset on each page reload in PHP can be caused by not starting the session before trying to access or set session variables. To solve this issue, ensure that session_start() is called at the beginning of each PHP script where session variables are being used.

<?php
session_start();

// Set session variable
$_SESSION['username'] = 'JohnDoe';

// Access session variable
echo $_SESSION['username'];
?>