Are there best practices for handling user sessions and logouts when integrating Facebook Connect with PHP?

When integrating Facebook Connect with PHP, it is important to handle user sessions and logouts properly to ensure a secure and seamless experience for users. Best practices include storing the Facebook user ID in a session variable upon login and clearing this variable upon logout to effectively manage user sessions.

// Start the session
session_start();

// Set the Facebook user ID in a session variable upon login
$_SESSION['fb_user_id'] = $facebook_user_id;

// Clear the Facebook user ID session variable upon logout
unset($_SESSION['fb_user_id']);