Is there any way in PHP 4.0.6 to query an object for its member 
functions? For example I have a couple classes that have an htmlString() 
function to display themselves in some special way as html. I'd like to 
go through a list of various objects, find out if each can run 
htmlString() and if so use that, otherwise use some generic 
object-to-html function.

I could just put a member variable in the object and check for that, but 
it would be more elegant to be able to check for the function directly.

Thanks for any suggestions.


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