How can PHP sessions be secured and managed to ensure consistent functionality across browsers?

To secure PHP sessions and ensure consistent functionality across browsers, you can use session_regenerate_id() to regenerate the session ID periodically and prevent session fixation attacks. Additionally, you can set session.cookie_httponly to true to prevent session cookies from being accessed by client-side scripts.

// Start the session
session_start();

// Regenerate the session ID periodically
if (mt_rand(1, 100) == 1) {
    session_regenerate_id();
}

// Set session cookie to be accessible only through HTTP
ini_set('session.cookie_httponly', 1);