zuvefox 0 Newbie Poster

hi..
I build vb.net server application/net remoting (desktop) base on ORM (nhibernate) with output web service (soap).
My public function used Iset type (iesi.collections from nhibernate) as parameter
such as : function save (byval s as Iset) as boolean

then,I build client using PHP to call that function via webservice soap.
how to pass parameter Iset type using PHP?
as I know, PHP does not have Iset type.

thanx