test Order API call with PHP using storeID & access token

HI Developers
I am need some help with making a sample request call to Yahoo small business Order API using PHP with store ID & token access.
http://lib.store.yahoo.net/lib/vw/order-api.xsd
You can checkout http://help.yahoo.com/l/us/yahoo/smallbusiness/store/api/docs/
I have tried with CURL, Fopen nothing worked for me so far.