How can one ensure seamless user experience when using a single account for both a custom website and a forum in PHP?

To ensure a seamless user experience when using a single account for both a custom website and a forum in PHP, you can implement a single sign-on (SSO) solution. This involves creating a centralized authentication system that allows users to log in once and access both the website and forum without having to log in again. This can be achieved by using session variables to store user authentication information across both platforms.

// Code snippet for implementing single sign-on (SSO) in PHP

// Start session
session_start();

// Check if user is logged in
if(isset($_SESSION['user_id'])) {
    // User is already authenticated, continue to website or forum
} else {
    // Redirect user to login page if not logged in
    header("Location: login.php");
    exit();
}