Unit testing fans will be happy to know that a Refcard from DZone has been published (authored by Giorgio Sironi) so you can keep PHPUnit at your fingertips.
Do you occasionally forget the syntax for creating Mocks and Stubs in PHPUnit? Or wonder how a command line option work? Or if there is an assertion that may be perfect for the test you're writing? Then this Refcard can help you. The Refcard is a PDF cheatsheet of 6 pages, which interleaves code samples with explaining test and sample outputs. Getting to know PHPUnit to use it at its full potential will be a little easier now.