Display SOAP request

[vertmonkee]

I am dealing with a web service which is sometimes throwing fatal errors.

I want to display the SOAP request so I can see what is being sent and hopefully fix the problem.

So far I have the following, where $xml_string is the contents of a file with the XML header emoved.

// Create a new soap client
		$client = new SoapClient("http://www.mba.ac.uk/demonstrations/schematron/validate.asmx?WSDL");


	// Create the parameters to pass to the service
	$parameters->xml->any = new SoapVar(trim($xml_string), XSD_ANYXML);

	/*
	 * Iso Schematron vlaidation
	 */

	// Send the request to the service
	$iso_response = $client->IsoSchematronValidation($parameters)->IsoSchematronValidationResult;

How would I display the last SOAP request.

Thanks for any help.