JSON Decode 2

<?php
$client = new SoapClient("http://www.scottnichol.com/samples/hellowsdl2.php?wsdl&debug=1",array(
                            "trace"=>1,
                            "exceptions"=>0)
);

//$req->firstname="Scott";
//$req->age="50";
//$req->gender="M";
//$parameters->person = $req;
$obj = $client->hello(array('firstname'=>"Scott",'age'=>"50",'gender'=>"M"));
//$xml = simplexml_load_string($client->__getLastResponse());
$xml = simplexml_load_string($client->__getLastRequest());
//$xml = new SimplexmlElement($client->__getLastResponse(), TRUE);
$json= json_encode($xml);
//$json= json_encode($client->__getLastResponse());
print "<pre>\n";
print "<br />\n Request : ".htmlspecialchars($client->__getLastRequest());
print "<br />\n Response: ".htmlspecialchars($client->__getLastResponse());

print "<br />\n xml: ".$xml;
print "<br />\n JSON: ".$json;
print "</pre>";
?>