If you were a fan of the PHP quizes that Mark van der Velden has posted in the past, you'll be happy to know he's come back with part four of the series after a bit of a hiatus.

It has been a while, but here is part 4 of the PHP Quiz series! A few questions to crack your brain about, or perhaps you know them all? Try them and find out! Also do read the idea behind these quizzes, here: The PHP Quiz series

In this quiz he tests your knowledge of class visibility, fluent method handling, class extension, strptime and a tricky "for" loop. Take the quiz and see how you do.