<?php
/**
 * Created by PhpStorm.
 * User: Giancarlo
 * Date: 20/07/2018
 * Time: 16:07
 */

 
 class SoapClientNG extends \SoapClient{

  public function __doRequest($req, $location, $action, $version = SOAP_1_1, $one_way = NULL) {

    $xml = explode("\r\n", parent::__doRequest($req, $location, $action, $version, $one_way));
    $response = preg_replace( '/^(\x00\x00\xFE\xFF|\xFF\xFE\x00\x00|\xFE\xFF|\xFF\xFE|\xEF\xBB\xBF)/', "", $xml[0] );
    return $response;

  }

} 

$soapClient = new SoapClient("http://192.168.253.128/servizi_xchange.asmx?wsdl", array(
  'trace' => true,
  'exceptions' => true,
  'cache_wsdl' => false,
));


try {
  $r = $soapClient->__doRequest(file_get_contents('test.xml'), 'http://192.168.253.128/servizi_xchange.asmx', 'servizi_xchange/ImportLists', SOAP_1_1);
} catch (SoapFault $e) {
  echo "Exception\n";
  print_r($e);
  echo "Response\n";
  print_r($soapClient->__getLastResponse());
}

print_r($r);