Are there any security concerns to consider when using sessions to store user selections in PHP forms?

When using sessions to store user selections in PHP forms, it is important to consider security concerns such as session hijacking or session fixation attacks. To mitigate these risks, you can regenerate the session ID after a user logs in or whenever their privilege level changes. This helps prevent an attacker from stealing or predicting a valid session ID.

// Regenerate session ID to prevent session fixation
session_regenerate_id(true);