<!-- language: php -->

$server = new nusoap_server;

$server->configureWSDL('server','urn:server');

$server->wsdl->schemaTargetNamespace = 'urn:server';

$server->register('register',
                array('username' => 'xsd:string'),  //input parameter
                array('return' => 'xsd:string'),    //output
                'urn:server',                       //namespace
                'urn:server#helloServer',           //SOAP action
                'rpc',
                'encoded',
                'Registrar un usuari');             //description

function register($username) {
    return 'L'usuari '.$username.' s'ha registrat correctament!';
}

$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';
$server->service($HTTP_RAW_POST_DATA);

<!-- language: php -->

$wsdl = "http://localhost/soapserver.php?wsdl";

$client = new nusoap_client($wsdl,'wsdl');

$err = $client->getError();

if ($err) {
    echo '<h2>Constructor error</h2>' . $err;
    exit();
}
if ($_POST) {
    echo $_POST;
}
if (isset($_POST["user"])) {
    echo $_POST["user"];
}