call .net webservice from php

Hi ,

i have an .net webservice that contain his own object (for the users
to pase them to the webservice back , for example i need the products
details (name,price...).
and i need that the php programmer send me and array of products by
using "sendProduct" function .

i so examples , how to call a webservice function , but how can i use
the object in php and send it to the webservice .

Regards, Rony