How can I get a list of arguments _expected_ by a function?

Question

I need to be able to interrogate a function/method and get a list of the arguments which that function expects, from outside the function, before the function is called.

So not argument values, but a list of expected argument 'slots' per say.

Possible?

Answer 1

Take a look at PHP Reflection - specifically the ReflectionParameter class...

http://nz.php.net/manual/en/language.oop5.reflection.php#language.oop5.reflection.reflectionparameter