What best practices should be followed when implementing session management in PHP to avoid unintended behavior like the one described in the thread?

The issue described in the thread is likely caused by not properly destroying the session data when a user logs out. To solve this issue, make sure to call session_destroy() along with clearing any session variables related to the user's login status.

// Start the session
session_start();

// When logging out, destroy the session data
session_unset();
session_destroy();