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span style="color: #808080; font-style: italic;">/**
 * On-the-fly Zip file creation class.
 * Makes and sends zip files without loading any file in RAM.
 * 2 possibilities (mixable) :
 *   - Use compression : the file will be sent after being gzcompressed
 *     BUT file must be able to fit in RAM for a GZ+CRC32+substr run
 *   - No compression : the file is directly sent : little RAM usage !
 *     Time saving, and best reactivity
 *     ZIP is not bigger when including photos or movies
 * + High level API to calculate the size of the ZIP, create & send it on the fly
 *   The download starts almost immediately, as there is no need to create the ZIP in advance
 *
 * Author/Copyright : Olivier MATHERET
 *   matheret@free.fr  http://matheret.free.fr
 * Licenced under CeCILL2
 *
 * Based on :
 *
 *  http://www.zend.com/codex.php?id=535&single=1
 *  By Eric Mueller <eric@themepark.com>
 *
 *  http://www.zend.com/codex.php?id=470&single=1
 *  by Denis125 <webmaster@atlant.ru>
 *
 *  a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified
 *  date and time of the compressed file
 *
 *  ConvertCharset.class.php from Mikolaj Jedrzejak <mikolajj@op.pl> + unicode.org tables
 *  http://www.unicode.org  Unicode Homepage
 *  http://www.mikkom.pl    Mikolaj Jedrzejak Homepage
 *
 *  Reverse CRC adapted from "Reversing CRC � Theory and Practice"
 *  HU Berlin Public Report
 *  Martin Stigge, Henryk Plotz, Wolf Muller, Jens-Peter Redlich
 *
 * Official ZIP file format: http://www.pkware.com/appnote.txt
 *
 * @access  public
*/'OMzip/OMcrc32.php''OMzip/ConvertCharset.class.php' );
 
 
 
/**
 * Creates and sends a ZIP on the fly, with no compression (just great for Jpeg/Gif/Movies)
 * VERY little RAM consumption, as the files never get loaded in RAM
 * The download starts almost immediately, as the ZIP is not created before sending
 *
 * @param  name     name to give to the ZIP file
 * @param  array    array of files to include
 *
 * @return integer  the size of the zip in bytes
 *
 * @access public
 */'Content-length: '/**
     * Size of compressed data
     *
     * @var  integer    $datalen
     *//**
     * Central directory
     *
     * @var  array    $ctrl_dir
     *//**
     * End of central directory record
     *
     * @var  string   $eof_ctrl_dir
     */"\x50\x4b\x05\x06\x00\x00\x00\x00";
 
 
    /**
     * Constructor : send ZIP headers
     *
     * @param  string   archive name
     * @param  integer  actually send the data ?
     *
     * @access private
     */"archive.zip"// If you're having a problem with a file download script not working with IE
            // if you call session_start() before sending the file, then try adding a
            // session_cache_limiter() call before session_start().
"Pragma: public"'Content-Description: File Transfer'"Cache-Control: must-revalidate, post-check=0, pre-check=0""Content-Transfer-Encoding: binary""Expires: 0""Last-Modified: ""D, d M Y H:i:s") . " GMT""Cache-Control: private"//header('Content-Type: application/force-download');
"Content-type: application/zip""Content-disposition: attachment; filename=\"$name\""/**
     * Converts an Unix timestamp to a four byte DOS date and time format (date
     * in high two bytes, time in low two bytes allowing magnitude comparison).
     *
     * @param  integer  the current Unix timestamp
     *
     * @return integer  the current date in a four byte DOS format
     *
     * @access private
     */'year''year''mon''mday''hours''minutes''seconds'] = 0;
        } // end if
'year''mon''mday''hours''minutes''seconds'] >> 1);
    } // end of the 'unix2DosTime()' method
 
 
    /**
     * Sends a file to stdout, using output control, megabyte per megabyte.
     * Useful when readfile or passthru corrupt data, and supposed to be more efficient, but
     * consumes PHP execution time.
     *
     * @param  string  file path
     *
     * @return boolean     success
     *
     * @access private
     */// how many bytes per chunk
        $buffer = '''rb'/**
     * Adds file to archive
     *
     * @param  filename content file to add
     * @param  string   name of the file in the archive (may contains the path)
     * @param  boolean  whether or not to compress the data  CAUTION: file must fit in RAM if "true" !
     * @param  integer  the current timestamp
     *
     * @return boolean  success of operations
     *
     * @access public
     */'./', '''\\', '/', $name)) , "CP1252", "CP437"'./', '''\\', '/''\x''\x''\x''\x''$hexdtime = "''";');
 
        $fr1  = "\x50\x4b\x03\x04";
        $fr1 .= "\x14\x00";    // ver needed to extract
        $fr1 .= "\x00\x00";    // gen purpose bit flag
"\x08\x00";                // compression method
"\x00\x00";                // compression method
// last mod time and date
// "local file header" segment
// fix crc bug
// crc32 that reads byte per byte the file
'V', $crc);             // crc32
'V'// compressed filesize
'V'// uncompressed filesize
'v'// length of filename
'v', 0);                // extra field length
// send this !
// "file data" segment
// now add to central directory record
        $cdrec  ="\x50\x4b\x01\x02";
        $cdrec .= "\x00\x00";                // version made by
        $cdrec .= "\x14\x00";                // version needed to extract
        $cdrec .= "\x00\x00";                // gen purpose bit flag
"\x08\x00";                // compression method
"\x00\x00";                // compression method
// last mod time & date
'V', $crc);           // crc32
'V'// compressed filesize
'V'// uncompressed filesize
'v'// length of filename
'v', 0 );             // extra field length
'v', 0 );             // file comment length
'v', 0 );             // disk number start
'v', 0 );             // internal file attributes
'V', 32 );            // external file attributes - 'archive' bit set
'V'// optional extra field, file comment goes here
        // save to central directory
// end of the 'addFile()' method
 
 
    /**
     * Dumps out end of ZIP
     *
     * @access public
     */'''v'// total # of entries "on this disk"
'v'// total # of entries overall
'V'// size of central dir
'V', $this -> datalen) .           // offset to start of central dir
            "\x00\x00";                             // .zip file comment length
// end of the 'file()' method
 
} // end of the 'zipfile' class
 

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