nusoap example2

client.php

<?php
// Pull in the NuSOAP code
require_once('nusoap.php');
// Create the client instance
$client = new soapclient('http://localhost/phphack/hellowsdl2.php?wsdl', true);
// Check for an error
$err = $client->getError();
if ($err) {
    // Display the error
    echo '<h2>Constructor error</h2><pre>' . $err . '</pre>';
    // At this point, you know the call that follows will fail
}
// Call the SOAP method
$person = array('firstname' => 'Willi', 'age' => 22, 'gender' => 'male');
$result = $client->call('hello', array('person' => $person));
// Check for a fault
if ($client->fault) {
    echo '<h2>Fault</h2><pre>';
    print_r($result);
    echo '</pre>';
} else {
    // Check for errors
    $err = $client->getError();
    if ($err) {
        // Display the error
        echo '<h2>Error</h2><pre>' . $err . '</pre>';
    } else {
        // Display the result
        echo '<h2>Result</h2><pre>';
        print_r($result);
    echo '</pre>';
    }
}
// Display the request and response
echo '<h2>Request</h2>';
echo '<pre>' . htmlspecialchars($client->request, ENT_QUOTES) . '</pre>';
echo '<h2>Response</h2>';
echo '<pre>' . htmlspecialchars($client->response, ENT_QUOTES) . '</pre>';
// Display the debug messages
echo '<h2>Debug</h2>';
echo '<pre>' . htmlspecialchars($client->debug_str, ENT_QUOTES) . '</pre>';
?>

server.php

<?php
// Pull in the NuSOAP code
require_once('nusoap.php');
// Create the server instance
$server = new soap_server();
// Initialize WSDL support
$server->configureWSDL('hellowsdl2', 'urn:hellowsdl2');
// Register the data structures used by the service
$server->wsdl->addComplexType(
    'Person',
    'complexType',
    'struct',
    'all',
    '',
    array(
        'firstname' => array('name' => 'firstname', 'type' => 'xsd:string'),
        'age' => array('name' => 'age', 'type' => 'xsd:int'),
        'gender' => array('name' => 'gender', 'type' => 'xsd:string')
    )
);
$server->wsdl->addComplexType(
    'SweepstakesGreeting',
    'complexType',
    'struct',
    'all',
    '',
    array(
        'greeting' => array('name' => 'greeting', 'type' => 'xsd:string'),
        'winner' => array('name' => 'winner', 'type' => 'xsd:boolean')
    )
);
// Register the method to expose
$server->register('hello',                    // method name
    array('person' => 'tns:Person'),          // input parameters
    array('return' => 'tns:SweepstakesGreeting'),    // output parameters
    'urn:hellowsdl2',                         // namespace
    'urn:hellowsdl2#hello',                   // soapaction
    'rpc',                                    // style
    'encoded',                                // use
    'Greet a person entering the sweepstakes'        // documentation
);
// Define the method as a PHP function
function hello($person) {
    $greeting = 'Hello, ' . $person['firstname'] .
                '. It is nice to meet a ' . $person['age'] .
                ' year old ' . $person['gender'] . '.';
    
    $winner = $person['firstname'] == 'Scott';

    return array(
                'greeting' => $greeting,
                'winner' => $winner
                );
}
// Use the request to (try to) invoke the service
$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';
$server->service($HTTP_RAW_POST_DATA);
?>

why im always return empty string. i with php version 7.1