php กับ web service ขอคำปรึกษาเรื่องการ return array ใน webservice ครับ

		$server->register('HelloWorld',$varname, array('return' => 'tns:ArrayOfString'));

		$server->wsdl->addComplexType("ArrayOfString", 
						 "complexType", 
						 "array", 
						 "", 
						 "SOAP-ENC:Array", 
						 array(), 
						 array(array("ref"=>"SOAP-ENC:arrayType","wsdl:arrayType"=>"xsd:string[]")), 
						 "xsd:string"); 

 require_once("lib/nusoap.php");
 
//Create a new soap server
$server = new soap_server();
 
//Define our namespace
$namespace = "http://localhost:81/webservice/index.php";
$server->wsdl->schemaTargetNamespace = $namespace;
 
//Configure our WSDL // set title
$server->configureWSDL("HelloWorld");

////////////////// register method for sale summary //////////////////////////
$salecondition = array(
		'year' => "xsd:int",
		'monthfrom' => "xsd:int",
		'monthto' => "xsd:int",
		'team' => "xsd:string"
);

$server->register('SaleSummaryReport',$salecondition, array('return' => 'tns:ArrayOfString'));

$server->wsdl->addComplexType("ArrayOfString", 
				 "complexType", 
				 "array", 
				 "", 
				 "SOAP-ENC:Array", 
				 array(), 
				 array(array("ref"=>"SOAP-ENC:arrayType","wsdl:arrayType"=>"xsd:string[]")), 
				 "xsd:string");  

function SaleSummaryReport($year, $monthfrom, $monthto, $team)
{
	// connect to SQL Server
	$conn = mssql_connect("10.0.4.2", "nattapone", "04natt");
	mssql_select_db("CoinMIS", $conn);

	$p_all = 1;
	$proc = mssql_init("RE_TEAM_MON_2005");
	
	mssql_bind($proc, '@saleyear', $year, SQLINT4);
	mssql_bind($proc, '@salemonth', $monthfrom, SQLINT4);
	mssql_bind($proc, '@salemonth2', $monthto, SQLINT4);
	mssql_bind($proc, '@team', $team, SQLVARCHAR);
	mssql_bind($proc, '@p_all', $p_all, SQLINT4);
	mssql_bind($proc, '@c01', $c01, SQLVARCHAR);
	mssql_bind($proc, '@c02', $c02, SQLVARCHAR);
	mssql_bind($proc, '@c03', $c03, SQLVARCHAR);
	mssql_bind($proc, '@c04', $c04, SQLVARCHAR);
	mssql_bind($proc, '@c05', $c05, SQLVARCHAR);
	mssql_bind($proc, '@c06', $c06, SQLVARCHAR);
	mssql_bind($proc, '@c07', $c07, SQLVARCHAR);
	mssql_bind($proc, '@c08', $c08, SQLVARCHAR);
	mssql_bind($proc, '@c09', $c09, SQLVARCHAR);
	mssql_bind($proc, '@c10', $c10, SQLVARCHAR);
	mssql_bind($proc, '@c11', $c11, SQLVARCHAR);
	mssql_bind($proc, '@c12', $c12, SQLVARCHAR);
	mssql_bind($proc, '@c13', $c13, SQLVARCHAR);
	mssql_bind($proc, '@c14', $c14, SQLVARCHAR);
	mssql_bind($proc, '@cA', $cA, SQLVARCHAR);
	mssql_bind($proc, '@cB', $cB, SQLVARCHAR);
	
	// execute
	$result = mssql_execute($proc);
	
	$data = array();
	while($row = mssql_fetch_assoc($result))
	{
		$data[] = $row['area'];
	}
	return $data;
}

// Get our posted data if the service is being consumed
// otherwise leave this data blank.
$POST_DATA = isset($GLOBALS['HTTP_RAW_POST_DATA']) ? $GLOBALS['HTTP_RAW_POST_DATA'] : '';
 
// pass our posted data (or nothing) to the soap service
$server->service($POST_DATA);
exit();