How can sessions in PHP affect the functionality of the browser back button?

Sessions in PHP can affect the functionality of the browser back button because session data is stored on the server and can cause the browser to display outdated information when navigating back. To solve this issue, you can use the `header()` function to prevent the browser from caching the page by setting the appropriate headers. 

<?php
session_start();

// Prevent caching of the page
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");

// Your PHP code here
?>

Keywords

PHP sessions browser back button session variables session management page caching

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