nusoap

<?php
define('ROOT_PATH', dirname(__FILE__));
require_once(ROOT_PATH.'/lib/nusoap.php');

$soap_url = 'http://publicbetawebservices.hotel.de/V2_8/FreeHotelSearchWebService.svc?WSDL';

$client = new nusoap_client($soap_url);

$err = $client->getError();
if ($err) {
    echo "\nConstructor error: {$err} \n".$client->getDebug();
    exit;
}

$client->setUseCurl(false);
$params = array();

$result = $client->call('GetWebservicesVersion', $params);
if ($client->fault) {
    echo "Fault (Expect - The request contains an invalid SOAP body)\n";
    print_r($result);
} else {
    $err = $client->getError();
    if ($err) {
        echo "\nError: {$err}";
    } else {
        echo "RESULT:\n";
        print_r($result);
    }
}