The pTest framework is an Object Oriented PHP 5 unit testing framework. It differs from other testing frameworks in that it doesn't suffer from a dogmatic following of JUnit. A good feature of this framework is that it can be as easily used from the commandline as embedded and extended by your application. Tests are easy to write and don't require naming conventions or other weirdness.

Check it out at http://ptest.redtreesystems.com or see our sourceforge page at http://sourceforge.net/projects/pTest.