How can the issue of data disappearing when clicking on multiple links be resolved in PHP sessions?

When clicking on multiple links, the issue of data disappearing in PHP sessions can be resolved by ensuring that session_start() is called at the beginning of each PHP file that needs access to session data. This initializes the session and allows the data to persist across multiple page loads. Additionally, using session_regenerate_id() can help prevent session fixation attacks by generating a new session ID each time a user logs in or performs a sensitive action.

<?php
session_start();

// Your PHP code here

session_regenerate_id();
?>