How to send a C++ array to a PHP webservice

I am making a PHP web service which will receive a C++ array and process the array. Here is the code I have written <?php require_once('nusoap.php'); $ns="http://localhost/webservice3"; $server = new soap_server(); $server->configureWSDL('CanadaTaxCalculator',$ns); $server->wsdl->schemaTargetNamespace=$ns; // This is the place where you declare your code $server->register('doRateURL', array('amount' => 'xsd:string'), array('return' => 'xsd:string'), $ns); //Over here define your code function doRateURL($array){ lookup the URLs in the db. return new soapval('return','xsd:string',); } Whats confusing me is that if i am receiving a string from a client, I write xsd:string. What should i write incase i am receiving an array? I checked up XML data types and there is no array datatype. can any one help me with this? -- "Windows [n.] A thirty-two bit extension and GUI shell to a sixteen bit patch to an eight bit operating system originally coded for a four bit microprocessor and sold by a two-bit company that can't stand one bit of competition."