private function writeData(&$fh, $msg)
{
$header = '';
$len = strlen($msg);
$signature = md5(md5($msg . OSRS_KEY) . OSRS_KEY);
$header .= 'POST / HTTP/1.0' . CRLF;
$header .= 'Content-Type: text/xml' . CRLF;
$header .= 'X-Username: ' . OSRS_USERNAME . CRLF;
$header .= 'X-Signature: ' . $signature . CRLF;
$header .= 'Content-Length: ' . $len . CRLF . CRLF;
fputs($fh, $header);
fputs($fh, $msg, $len);
}