What are the potential pitfalls of not passing the session ID in a PHP link?

Not passing the session ID in a PHP link can lead to session hijacking or session fixation attacks, where unauthorized users can access sensitive information or perform actions on behalf of the legitimate user. To solve this issue, you should always ensure that the session ID is passed securely in every link or form submission. 

<?php
session_start();

// Generate a new session ID if one doesn't already exist
if (!isset($_SESSION['id'])) {
    session_regenerate_id();
    $_SESSION['id'] = session_id();
}

// Use session ID in links or forms
echo '<a href="page.php?sid=' . $_SESSION['id'] . '">Link</a>';
?>

Keywords

session ID PHP link security vulnerability session hijacking data leakage

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