Learn how to enhance a PHP comment system by adding user authentication functionality. This tutorial guides you through creating a login form, implementing session management, and integrating user data into comments. Discover techniques for securely storing user information in a database, managing user sessions, and implementing logout functionality. By the end of this hands-on tutorial, you'll have the skills to transform an anonymous comment system into a personalized user experience, allowing for better user engagement and data management in your PHP-based web applications.