PHP Chat is a free customizable web chat software implemented in JavaScript (client side) and PHP (server side). The script implements public and private chat; logging in as a register user or as a guest; smileys; away status; etc. PHP Chat can be integrated with a third-party membership system by implementing user authentication routine. If a user is already signed in to your website, he can be logged in to the chat automatically without the need to re-enter login information.