In what scenarios is it advisable to use cookies for managing sessions in PHP applications?

Cookies can be used to manage sessions in PHP applications when you want to store session data on the client side. This can be useful in scenarios where you want to maintain session information even if the user closes the browser or navigates away from the website. However, it's important to be cautious with sensitive data as cookies are stored on the client side and can be manipulated.

// Start a session and set a cookie to store session data
session_start();

// Set a session variable
$_SESSION['user_id'] = 123;

// Set a cookie to store the session ID
setcookie('PHPSESSID', session_id(), time() + 3600, '/');