xmlrpc digest client request

$post_data = array(
          'username'=> $USER,
          'password'=> $PASS
    );

  $options = array(
          CURLOPT_URL            => $urlCdr,
          CURLOPT_HEADER         => true,
          CURLOPT_VERBOSE        => true,
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_FOLLOWLOCATION => true,
          CURLOPT_SSL_VERIFYPEER => false,    // for https
          // CURLOPT_USERPWD        => $USER . ":" . $PASS,
          CURLOPT_HTTPAUTH       => CURLAUTH_DIGEST,
          CURLOPT_POST           => true,
          CURLOPT_POSTFIELDS     => http_build_query($post_data)
  );

  $ch = curl_init();

  curl_setopt_array( $ch, $options );

  try {
    $raw_response  = curl_exec( $ch );

  } catch(Exception $ex) {
      if ($ch != null) curl_close($ch);
      throw new Exception($ex);
  }

  if ($ch != null) curl_close($ch);

  $header = explode("\n", $raw_response)[3];
  $re = "/([a-z]+)=\"(.*?)\"/";
  preg_match_all($re, $header, $matches);
  $cnonce = time();
  $credentials[] = 'username="' . $USER . '"';
  $credentials[] = 'digest-uri="' . $urlCdr . '"';
  $credentials[] = 'cnonce="' . $cnonce . '"';
  $credentials[] = 'nc-value="1"';
  $credentials[] = 'responce="'. md5($USER . ':1' . ':' . $cnonce) .'"';
  foreach ($matches[1] as $k => $v) {
    $credentials[] = $v . '="' . $matches[2][$k] . '"';
  }
  $header = "Authorization: Digest " . implode(",\n", $credentials);

    $request = xmlrpc_encode_request("getAccountCDRs", array(
        'username'=> $USER,
        'password'=> $PASS
        ));
    $context = stream_context_create(array('http' => array(
        'header' => "Content-type: text/xml\n" . $header,
        'content' => $request
    )));
    // $file = file_get_contents($urlCdr, false, $context);
    $response = xmlrpc_decode($file);
    if ($response && xmlrpc_is_fault($response)) {
        trigger_error("xmlrpc: $response[faultString] ($response[faultCode])");
    } else {
        print_r($response);
    }