What best practices should be followed when implementing PHP sessions to avoid session loss or unexpected behavior?

When implementing PHP sessions, it is important to set the session cookie parameters correctly to avoid session loss or unexpected behavior. This includes setting the session cookie lifetime, path, domain, and secure flag appropriately. Additionally, always regenerate the session ID after a user logs in or performs a sensitive action to prevent session fixation attacks.

// Set session cookie parameters
session_set_cookie_params([
    'lifetime' => 3600, // 1 hour
    'path' => '/',
    'domain' => 'example.com',
    'secure' => true,
    'httponly' => true
]);

// Start the session
session_start();

// Regenerate session ID
session_regenerate_id(true);