What are the potential pitfalls of using sessions in PHP, especially with regards to browser compatibility?

Potential pitfalls of using sessions in PHP include issues with browser compatibility, as some browsers may not support cookies or may have strict security settings that prevent sessions from being properly maintained. To ensure compatibility, it is important to set session cookie parameters such as the domain, path, and secure flag.

// Set session cookie parameters for better browser compatibility
session_set_cookie_params([
    'lifetime' => 0,
    'path' => '/',
    'domain' => '.example.com',
    'secure' => true,
    'httponly' => true
]);
session_start();