What potential pitfalls can arise when using session_regenerate_id(true) in conjunction with Mod Rewrite in PHP?

When using session_regenerate_id(true) in conjunction with Mod Rewrite in PHP, a potential pitfall is that the session ID may not be properly updated in the rewritten URLs, leading to session fixation vulnerabilities. To solve this issue, you can manually update the session ID in the rewritten URLs by appending it as a query parameter. 

<?php
session_start();

// Regenerate session ID
session_regenerate_id(true);

// Get current URL
$currentUrl = $_SERVER['REQUEST_URI'];

// Append session ID as a query parameter
$newUrl = $currentUrl . (strpos($currentUrl, '?') ? '&' : '?') . 'PHPSESSID=' . session_id();

// Redirect to the new URL
header('Location: ' . $newUrl);
exit;
?>

Keywords

session_regenerate_id Mod Rewrite PHP security session hijacking

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