ImpEx: what is the intention of passing argument by reference?
 

Hello Jerry,I am writing an ImpEx system to import subdreamer2 into vb4 publishing suite for my client .It is almost done, but I still have not found the benefit of passing arguments by references in all of impex systems I have taken a look at.In my understanding, I would prefer passing by values which is the default way of PHP. Could you give some explanation of why arguments have to be passed by references? Or is this just a 'legacy' in some way?