Guestbook programs are very popular now days. It is a nice feature for your visitors to be able to leave messages to you or other visitors. This PHP guestbook program will allow your visitors to leave their two cents on your web page. It has a number of customizable features to suit almost any sites design. This PHP guestbook program was recently updated to allow for the usage of an anti spammer security feature; the visitor must now enter a random number in order to post message.