What are some best practices for handling user sessions in PHP applications?

One best practice for handling user sessions in PHP applications is to regenerate session IDs periodically to prevent session fixation attacks. This can be done by calling `session_regenerate_id(true)` at regular intervals. Additionally, it's important to properly secure session data by using HTTPS and setting the `session.cookie_secure` and `session.cookie_httponly` directives in the php.ini file.

// Regenerate session ID
session_regenerate_id(true);

// Set session cookie parameters
ini_set('session.cookie_secure', 1);
ini_set('session.cookie_httponly', 1);

// Start the session
session_start();