How can inconsistent session IDs affect user experience in PHP programs?

Inconsistent session IDs can lead to users being logged out unexpectedly, losing their session data, or experiencing errors when accessing protected pages. To solve this issue, it is important to ensure that session IDs are generated and maintained consistently throughout the user's session.

// Start the session
session_start();

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