What steps can be taken to ensure that sessions are properly managed and maintained in PHP applications across various browsers?

To ensure that sessions are properly managed and maintained in PHP applications across various browsers, it is important to set the session cookie parameters to be consistent across all requests. This includes setting the session cookie domain, path, and secure flag. Additionally, using session_regenerate_id() periodically can help prevent session fixation attacks.

// Set session cookie parameters
session_set_cookie_params(0, '/', '.example.com', true, true);

// Start the session
session_start();

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