The PHP test script shows you the request and response texts.
The request may require a SOAP Action. In this case it is possible to read it from the wsdl. However as I am always running tcpdump for debug purposes I can check the outgoing tcp packet to get the Soap Action from there
Another tool used to test the requests is another widget I created. This widget allows me to send SOAP requests to services. Using this widget I can manipulate the request to test the service. The response is made available in the resultant scrollable textarea (this widget will be covered in a future blog).