I want to dive a little into WordPress codebase but modern PHP is quite a different language from what I’ve learned – albeit a little – way ago, so long ago that WordPress didn’t even existed then. Beside reading the obvious official documentation, I’ve discovered that the almighty O’Really seems not to have a recent book on PHP, or a book about recent PHP either. As books from Packt publishing quite often turns out to be “quite shallow”, I’ve been looking for info the good old way, namely IRC channels. They told me these little gems:

• PHP The Right Way

• ##php, hashphp.org

Well, they really look the right documentation for me.