<?php/* $Id: zip.lib.php 6461 2004-11-03 13:56:52Z garvinhicking $ */// vim: expandtab sw=4 ts=4 sts=4:/** * Zip file creation class. * Makes zip files. * * 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 * * Official ZIP file format: http://www.pkware.com/appnote.txt * * @access  public */class zipfile{    /**     * Array to store compressed data     *     * @var  array    $datasec     */    var $datasec      = array();    /**     * Central directory     *     * @var  array    $ctrl_dir     */    var $ctrl_dir     = array();    /**     * End of central directory record     *     * @var  string   $eof_ctrl_dir     */    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";    /**     * Last offset position     *     * @var  integer  $old_offset     */    var $old_offset   = 0;    /**     * Converts an Unix timestamp to a four byte DOS date and time format (date     * in high two bytes, time in low two bytes allowing magnitude comparison).     *     * @param  integer  the current Unix timestamp     *     * @return integer  the current date in a four byte DOS format     *     * @access private     */    function unix2DosTime($unixtime = 0) {        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);        if ($timearray['year'] < 1980) {            $timearray['year']    = 1980;            $timearray['mon']     = 1;            $timearray['mday']    = 1;            $timearray['hours']   = 0;            $timearray['minutes'] = 0;            $timearray['seconds'] = 0;        } // end if        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |                ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);    } // end of the 'unix2DosTime()' method    /**     * Adds "file" to archive     *     * @param  string   file contents     * @param  string   name of the file in the archive (may contains the path)     * @param  integer  the current timestamp     *     * @access public     */    function addFile($data, $name, $time = 0)    {        $name     = str_replace('\\', '/', $name);        $dtime    = dechex($this->unix2DosTime($time));        $hexdtime = '\x' . $dtime[6] . $dtime[7]                  . '\x' . $dtime[4] . $dtime[5]                  . '\x' . $dtime[2] . $dtime[3]                  . '\x' . $dtime[0] . $dtime[1];        eval('$hexdtime = "' . $hexdtime . '";');        $fr   = "\x50\x4b\x03\x04";        $fr   .= "\x14\x00";            // ver needed to extract        $fr   .= "\x00\x00";            // gen purpose bit flag        $fr   .= "\x08\x00";            // compression method        $fr   .= $hexdtime;             // last mod time and date        // "local file header" segment        $unc_len = strlen($data);        $crc     = crc32($data);        $zdata   = gzcompress($data);        $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug        $c_len   = strlen($zdata);        $fr      .= pack('V', $crc);             // crc32        $fr      .= pack('V', $c_len);           // compressed filesize        $fr      .= pack('V', $unc_len);         // uncompressed filesize        $fr      .= pack('v', strlen($name));    // length of filename        $fr      .= pack('v', 0);                // extra field length        $fr      .= $name;        // "file data" segment        $fr .= $zdata;        // "data descriptor" segment (optional but necessary if archive is not        // served as file)        // nijel(2004-10-19): this seems not to be needed at all and causes        // problems in some cases (bug #1037737)        //$fr .= pack('V', $crc);                 // crc32        //$fr .= pack('V', $c_len);               // compressed filesize        //$fr .= pack('V', $unc_len);             // uncompressed filesize        // add this entry to array        $this -> datasec[] = $fr;        // 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        $cdrec .= "\x08\x00";                // compression method        $cdrec .= $hexdtime;                 // last mod time & date        $cdrec .= pack('V', $crc);           // crc32        $cdrec .= pack('V', $c_len);         // compressed filesize        $cdrec .= pack('V', $unc_len);       // uncompressed filesize        $cdrec .= pack('v', strlen($name) ); // length of filename        $cdrec .= pack('v', 0 );             // extra field length        $cdrec .= pack('v', 0 );             // file comment length        $cdrec .= pack('v', 0 );             // disk number start        $cdrec .= pack('v', 0 );             // internal file attributes        $cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set        $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header        $this -> old_offset += strlen($fr);        $cdrec .= $name;        // optional extra field, file comment goes here        // save to central directory        $this -> ctrl_dir[] = $cdrec;    } // end of the 'addFile()' method    /**     * Dumps out file     *     * @return  string  the zipped file     *     * @access public     */    function file()    {        $data    = implode('', $this -> datasec);        $ctrldir = implode('', $this -> ctrl_dir);        return            $data .            $ctrldir .            $this -> eof_ctrl_dir .            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries "on this disk"            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries overall            pack('V', strlen($ctrldir)) .           // size of central dir            pack('V', strlen($data)) .              // offset to start of central dir            "\x00\x00";                             // .zip file comment length    } // end of the 'file()' method} // end of the 'zipfile' class?>