class SoapClientNG extends \SoapClient{


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


        $xml = explode("\r\n", parent::__doRequest($req, $location, $action, $version));


        $response = preg_replace( '/^(\x00\x00\xFE\xFF|\xFF\xFE\x00\x00|\xFE\xFF|\xFF\xFE|\xEF\xBB\xBF)/', "", $xml[5] );


        return $response;


    }


}
try{

    $opts = array(
        'ssl' => array('ciphers'=>'RC4-SHA', 'verify_peer' => false, 'verify_peer_name' => false)
    );
    $client = new SoapClientNG(
        'https://sassrvc.benefitsystems.pl/SASBIWS/services/WS/ks_status?wsdl',
        array ( "encoding"=>"UTF-8",
            'stream_context' => stream_context_create($opts),
            "trace"=>1,
            "exceptions"=>0,
            "connection_timeout"=>2000 ));
    $client->__setLocation("https://sassrvc.benefitsystems.pl/SASBIWS/services/WS/ks_status");
    $test = new \stdClass;
    $test->parameters = new \stdClass;
    $test->parameters->nr_karta = '307403677135';
    $client->ks_status($test);

    $result = $client->__getLastResponse();
    var_dump($result);
    $resultXml = simplexml_load_string($result);
    $posts = $xml->children('soapenv', true)->Body->children('n', true)->ks_statusResponse->ks_statusResult->Streams->_WEBOUT->Value;
    var_dump($posts);
    var_dump(base64_decode($result));


} catch(SoapFault $e){
    var_dump($e);
}