ZipStream\ZipStream::addDataDescriptorHeader PHP Method

    protected function addDataDescriptorHeader($len, $zlen, $crc)
    {
        $fields = array(array('V', 0x8074b50), array('V', $crc), array('V', $zlen), array('V', $len));
        $ret = $this->packFields($fields);
        $num_bytes_written = strlen($ret);
        $this->send($ret);
        return $num_bytes_written;
    }