DRBGuestbook

DRBGuestbook is a free, simple PHP guestbook script that doesn't require database software. It allows you delete entries and ban IP addresses through an easy-to-use, password protected administration interface. Included are a number of anti-spam features, such as image verification and URL blocking. You can also receive an e-mail notification anytime someone signs your guestbook.

Features

Quick and easy to install.
No database software is required. Entries are stored in a simple flat file.
Delete multiple entries at once.
Includes an anti-spam challenge-response test.
Ban IP addresses from signing your guestbook.
Receive e-mail notifications when your guestbook is signed.
Block entries containing words from a configurable bad words list.
Includes flood protection to prevent users from posting too frequently.
Prevents HTML code or URLs from being posted in comments, as an anti-spam measure.
Minimum and maximum comment length is configurable.
Easily customize text such as field labels, warning messages, and the date and time format.
Date format and time zone are easily configurable.
Pages are XHTML syntax compliant, and compatible with both IE and Firefox.
Web-based administration interface.