&reftitle.install; Tidy is currently available for PHP 4.3.x and PHP 5 as a PECL extension from &url.pecl.package;tidy. Tidy 1.0 is just for PHP 4.3.x, while Tidy 2.0 is just for PHP 5. If PEAR is available on your *nix-like system you can use the pear installer to install the tidy extension, by the following command: pecl install tidy. You can always download the tar.gz package and install tidy by hand: Windows users can download the extension dll from &url.pecl.win.ext;php_tidy.dll. In PHP 5 you need only to compile using the --with-tidy option.