[Sommaire] [Imprimer]

   1  <?php
   2  // $Id: class.zipfile.php 2 2005-11-02 18:23:29Z skalpa $

   3  /*

   4      package::i.tools

   5  

   6      php-downloader    v1.0    -    www.ipunkt.biz

   7  

   8      (c)    2002 - www.ipunkt.biz (rok)

   9  

  10   * Zip file creation class.

  11   * Makes zip files.

  12   *

  13   * Based on :

  14   *

  15   *  http://www.zend.com/codex.php?id=535&single=1

  16   *  By Eric Mueller <eric@themepark.com>

  17   *

  18   *  http://www.zend.com/codex.php?id=470&single=1

  19   *  by Denis125 <webmaster@atlant.ru>

  20   *

  21   *  a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified

  22   *  date and time of the compressed file

  23   *

  24   * Official ZIP file format: http://www.pkware.com/appnote.txt

  25   *

  26   * @copyright    (c)    2002 - www.ipunkt.biz (rok)

  27   * @access  public

  28   * 

  29   * @package     kernel

  30   * @subpackage  core

  31   */
  32  class zipfile
  33  {
  34      /**

  35       * Array to store compressed data

  36       *

  37       * @var  array    $datasec

  38       */
  39      var $datasec      = array();
  40  
  41      /**

  42       * Central directory

  43       *

  44       * @var  array    $ctrl_dir

  45       */
  46      var $ctrl_dir     = array();
  47  
  48      /**

  49       * End of central directory record

  50       *

  51       * @var  string   $eof_ctrl_dir

  52       */
  53      var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
  54  
  55      /**

  56       * Last offset position

  57       *

  58       * @var  integer  $old_offset

  59       */
  60      var $old_offset   = 0;
  61  
  62  
  63      /**

  64       * Converts an Unix timestamp to a four byte DOS date and time format (date

  65       * in high two bytes, time in low two bytes allowing magnitude comparison).

  66       *

  67       * @param  integer  the current Unix timestamp

  68       *

  69       * @return integer  the current date in a four byte DOS format

  70       *

  71       * @access private

  72       */
  73      function unix2DosTime($unixtime = 0)
  74      {
  75          $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
  76  
  77          if ($timearray['year'] < 1980) {
  78              $timearray['year']    = 1980;
  79              $timearray['mon']     = 1;
  80              $timearray['mday']    = 1;
  81              $timearray['hours']   = 0;
  82              $timearray['minutes'] = 0;
  83              $timearray['seconds'] = 0;
  84          } // end if

  85  
  86          return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
  87                  ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
  88      } // end of the 'unix2DosTime()' method

  89  
  90  
  91      /**

  92       * Adds "file" to archive

  93       *

  94       * @param  string   file contents

  95       * @param  string   name of the file in the archive (may contains the path)

  96       * @param  integer  the current timestamp

  97       *

  98       * @access public

  99       */
 100      function addFile($data, $name, $time = 0)
 101      {
 102          $name     = str_replace('\\', '/', $name);
 103  
 104          $dtime    = dechex($this->unix2DosTime($time));
 105          $hexdtime = '\x' . $dtime[6] . $dtime[7]
 106                    . '\x' . $dtime[4] . $dtime[5]
 107                    . '\x' . $dtime[2] . $dtime[3]
 108                    . '\x' . $dtime[0] . $dtime[1];
 109          eval('$hexdtime = "' . $hexdtime . '";');
 110  
 111          $fr   = "\x50\x4b\x03\x04";
 112          $fr   .= "\x14\x00";            // ver needed to extract

 113          $fr   .= "\x00\x00";            // gen purpose bit flag

 114          $fr   .= "\x08\x00";            // compression method

 115          $fr   .= $hexdtime;             // last mod time and date

 116  
 117          // "local file header" segment

 118          $unc_len = strlen($data);
 119          $crc     = crc32($data);
 120          $zdata   = gzcompress($data);
 121          $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug

 122          $c_len   = strlen($zdata);
 123          $fr      .= pack('V', $crc);             // crc32

 124          $fr      .= pack('V', $c_len);           // compressed filesize

 125          $fr      .= pack('V', $unc_len);         // uncompressed filesize

 126          $fr      .= pack('v', strlen($name));    // length of filename

 127          $fr      .= pack('v', 0);                // extra field length

 128          $fr      .= $name;
 129  
 130          // "file data" segment

 131          $fr .= $zdata;
 132  
 133          // "data descriptor" segment (optional but necessary if archive is not

 134          // served as file)

 135          $fr .= pack('V', $crc);                 // crc32

 136          $fr .= pack('V', $c_len);               // compressed filesize

 137          $fr .= pack('V', $unc_len);             // uncompressed filesize

 138  
 139          // add this entry to array

 140          $this -> datasec[] = $fr;
 141          $new_offset        = strlen(implode('', $this->datasec));
 142  
 143          // now add to central directory record

 144          $cdrec = "\x50\x4b\x01\x02";
 145          $cdrec .= "\x00\x00";                // version made by

 146          $cdrec .= "\x14\x00";                // version needed to extract

 147          $cdrec .= "\x00\x00";                // gen purpose bit flag

 148          $cdrec .= "\x08\x00";                // compression method

 149          $cdrec .= $hexdtime;                 // last mod time & date

 150          $cdrec .= pack('V', $crc);           // crc32

 151          $cdrec .= pack('V', $c_len);         // compressed filesize

 152          $cdrec .= pack('V', $unc_len);       // uncompressed filesize

 153          $cdrec .= pack('v', strlen($name) ); // length of filename

 154          $cdrec .= pack('v', 0 );             // extra field length

 155          $cdrec .= pack('v', 0 );             // file comment length

 156          $cdrec .= pack('v', 0 );             // disk number start

 157          $cdrec .= pack('v', 0 );             // internal file attributes

 158          $cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set

 159  
 160          $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header

 161          $this -> old_offset = $new_offset;
 162  
 163          $cdrec .= $name;
 164  
 165          // optional extra field, file comment goes here

 166          // save to central directory

 167          $this -> ctrl_dir[] = $cdrec;
 168      } // end of the 'addFile()' method

 169  
 170  
 171      /**

 172       * Dumps out file

 173       *

 174       * @return  string  the zipped file

 175       *

 176       * @access public

 177       */
 178      function file()
 179      {
 180          $data    = implode('', $this -> datasec);
 181          $ctrldir = implode('', $this -> ctrl_dir);
 182  
 183          return
 184              $data .
 185              $ctrldir .
 186              $this -> eof_ctrl_dir .
 187              pack('v', count($this -> ctrl_dir)) .  // total # of entries "on this disk"
 188              pack('v', count($this -> ctrl_dir)) .  // total # of entries overall
 189              pack('V', strlen($ctrldir)) .           // size of central dir
 190              pack('V', strlen($data)) .              // offset to start of central dir
 191              "\x00\x00";                             // .zip file comment length

 192      } // end of the 'file()' method

 193  
 194  } // end of the 'zipfile' class

 195  
 196  ?>