Are there any potential pitfalls when using session variables in PHP?

One potential pitfall when using session variables in PHP is the risk of session hijacking or session fixation attacks. To mitigate this risk, it is important to regenerate the session ID after a user logs in or performs a sensitive action. This helps prevent an attacker from stealing or fixing a session ID to gain unauthorized access.

// Regenerate session ID after user logs in or performs a sensitive action
session_regenerate_id(true);