60 PHP Guestbook are provided on PHPKode.com

[Mario Brown]

Just begin your PHP learning or developing? Try to find the PHP
Guestbook that may help you with the help of PHPKode.com, for more
than 60 PHP Guestbook are provided on PHPKode.com
http://www.phpkode.com/projects/category/php-guestbooks/

Find the most Security one to allow visitors to comment on your
webiste now? Maybe I should recommend you this one, GBook -
http://www.phpkode.com/projects/item/gbook/, But it should be better
if you can find one by yourself!