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The PHP development team is usually against these kinds of OOP syntax sugar
additions, search Google / the archives for:
I don't think this is syntactic sugar, it goes deeper into the language than
that if done right.
I like your userland implementation, but it will get slow once you start
walking inheritance trees. It does provide me with a forwards-compatible way
to do it though (in case the dev team ever do take up the idea of building it
in to the language...). Hmm. Could cache the results I suppose.
Duncan