On PHPKitchen today, there's this new post with information on installing the Tidy software on both PHP4 and PHP5.

If you're like me, you need to run both PHP4 and PHP5 on the same computer, at the same time. If you're installing PHP from source, this is pretty easy, as you can use the "--prefix" option to install each version into a different location. So, for example, I install PHP4 into /usr/local/php4, and PHP5 into /usr/local/php5.

However, I recently had problems with getting tidy to work with this setup. With Demian's help, however, I have the answer.

He then steps through the process for both sides, giving settings and configure hints along the way...