ZipStream\ZipStream::addFileHeader PHP Method

    protected function addFileHeader($name, &$opt, $meth, $crc, $zlen, $len, $genb = 0x0)
    {
        // strip leading slashes from file name
        // (fixes bug in windows archive viewer)
        $name = preg_replace('/^\\/+/', '', $name);
        // calculate name length
        $nlen = strlen($name);
        // create dos timestamp
        $opt['time'] = isset($opt['time']) && !empty($opt['time']) ? $opt['time'] : time();
        $dts = $this->dostime($opt['time']);
        if (mb_check_encoding($name, "UTF-8") && !mb_check_encoding($name, "ASCII")) {
            // Sets Bit 11: Language encoding flag (EFS).  If this bit is set,
            // the filename and comment fields for this file
            // MUST be encoded using UTF-8. (see APPENDIX D)
            $genb |= 0x800;
        }
        // build file header
        $fields = array(array('V', 0x4034b50), array('v', 0xa), array('v', $genb), array('v', $meth), array('V', $dts), array('V', $crc), array('V', $zlen), array('V', $len), array('v', $nlen), array('v', 0));
        // pack fields and calculate "total" length
        $ret = $this->packFields($fields);
        $header = $ret . $name;
        $num_bytes_written = strlen($header);
        // print header and filename
        $this->send($header);
        return $num_bytes_written;
    }