I'm feeling very bloggy today.
Anyway, I'm getting more comfortable with PHPUnit, and although I've spoken of it in near-monosyllables here before, I haven't really written a ground-up post talking about what it is, what it does, and why you'd be a fool to write PHP code without it (or something like it; there are other PHP testing frameworks).
( Unit testing theory, 101 )
( PHPUnit )
( Code coverage reports (with PHPUnit) )
( Wrapping it up (in an XML configuration file) )