oop - PHP classes source code -

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i'm on stage of learning oop of php , david powers book (php object oriented solutions). i'm on chapter 3, talks using datetime class. i'll see implementation of datetime class in order underatnd how oop realy works.

1) where/how can find source code of datetime class?

2) beginner useful see code source of such classes, or better stay away messy things @ level?

don't bother trying @ code built-in php classes; they're not written in php (they're in c), won't teach writing php. code available if want it, going useful if know c)

however there lots of example classes available. pear repository contains loads of php classes can learning. might want download of examples in appropriately named phpclasses.org.


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