PHP guestbook is a template-based and simple to set up guestbook script. It does not require any SQL database to be set up.

E-Guest is a full-featured PHP guestbook system. Features: Multi-pages display, Sort entry (LIFO, LILO, alphabetical), Set number of entries per page, Search for matching name, Total entries count, Message for no matching found, Dynamic icon display, Page Spanning, Checking for required field, Warning messages for missing fields, Entry preview after submitted, URL fixing, HTML tag filtering, Multiple line in comment support, Fully customizable, Easy setup, and more. EGuest is also the only guestbook supports ALL COMBINATIONS OF CHARACTERS as far as I know. (', ", ', " )

This guestbook doesn't require a SQL database and it's very easy to customize and set-up. You can control all of the colors with a basic knowledge of html and it's under a GPL license so feel free to edit and redistribute this script!

A little shoutbox where your visitors can leave a message. Features: simple and fast, automatic installation, high customization level, customizable emoticons. <a href="http://www.rayan.info/scripts/en/raybox/demo">[DEMO]</a>

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EzGuestBook is a very simple guestbook written in PHP that features guestbook record sorting, administration panel, IP Logging and more. It is written for MySQL and PHP version 4.0 or later.

The Innovate Book is not just a basic guestbook. It is loaded with features and very easy to use. It is based on templates, which makes it very easy to change the design according to your needs. The Admin Control Panel and installation script enable you to install the guestbook without any knowledge of programming. Features: customizable design and layout , possibility of moderating guestbook entries , unlimited input fields , possibility of deactivating the guestbook , notification when there are new entries , The guestbook is written in MySQL/PHP

Harlem Designs Guestbook is a powerful php guestbook which can handle a lot of data without using any database like mySQL. You can configure the layout and many other options to adapt it to your needs. It also includes an admin module to remove or change entries, to configure the whole script, choose language, take backups, word-filter, rate site and other important stuff. Compared to other database-driven programs, the speed is just as fast or faster.

PHP.Book is a tiny and fast guestbook system written in PHP using a MySQL database. Easy to setup, no PHP knowledge required.

php3guest is an easy to use guestbook implementation for PHP (4.1.0 and higher) using a mysql database as a backend. Features include: easy customization using header and footer, option to allow HTML in posting, set the number of entries to display per page, required field checking, optional email notification and more.