Permalink
Switch branches/tags
Nothing to show
Find file
Fetching contributors…
Cannot retrieve contributors at this time
286 lines (233 sloc) 9.69 KB
<?php
// $Id: CC_ZIP_File.php,v 1.5 2003/12/02 17:47:10 patrick Exp $
//=======================================================================
// CLASS: CC_Zip_File
//=======================================================================
/**
* 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 CC_ZIP_File
{
/**
* 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;
/**
* File size of the ZIPed file
* @var integer $compressed_file_size
*/
var $compressed_file_size = 0;
//-------------------------------------------------------------------
// METHOD: addFolder()
//-------------------------------------------------------------------
/**
* Adds "directory" to archive - do this before putting any files in directory. Then you can add files using addFile() with names like "path/file.txt"
*
* @param $name - name of directory. eg: "path/"
* @access public
*/
function addFolder($name)
{
$name = str_replace("\\", "/", $name);
$fr = "\x50\x4b\x03\x04";
$fr .= "\x0a\x00";// ver needed to extract
$fr .= "\x00\x00";// gen purpose bit flag
$fr .= "\x00\x00";// compression method
$fr .= "\x00\x00\x00\x00"; // last mod time and date
$fr .= pack("V",0); // crc32
$fr .= pack("V",0); //compressed filesize
$fr .= pack("V",0); //uncompressed filesize
$fr .= pack("v", strlen($name) ); //length of pathname
$fr .= pack("v", 0 ); //extra field length
$fr .= $name;
// end of "local file header" segment
// no "file data" segment for path
// "data descriptor" segment (optional but necessary if archive is not served as file)
$fr .= pack("V",$crc); //crc32
$fr .= pack("V",$c_len); //compressed filesize
$fr .= pack("V",$unc_len); //uncompressed filesize
// add this entry to array
$this -> datasec[] = $fr;
$new_offset = strlen(implode("", $this->datasec));
// ext. file attributes mirrors MS-DOS directory attr byte, detailed
// at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp
// now add to central record
$cdrec = "\x50\x4b\x01\x02";
$cdrec .= "\x00\x00";// version made by
$cdrec .= "\x0a\x00";// version needed to extract
$cdrec .= "\x00\x00";// gen purpose bit flag
$cdrec .= "\x00\x00";// compression method
$cdrec .= "\x00\x00\x00\x00"; // last mod time & date
$cdrec .= pack("V", 0); // crc32
$cdrec .= pack("V", 0); //compressed filesize
$cdrec .= pack("V", 0); //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
$ext = "\x00\x00\x10\x00";
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V", 16); //external file attributes- 'directory' bit set
$cdrec .= pack("V", $this->old_offset); //relative offset of local header
$this->old_offset = $new_offset;
$cdrec .= $name;
// optional extra field, file comment goes here
// save to array
$this->ctrl_dir[] = $cdrec;
}
//-------------------------------------------------------------------
// METHOD: unix2DosTime()
//-------------------------------------------------------------------
/**
* Converts an Unix timestamp to a four byte DOS date and time format (date
* in high two bytes, time in low two bytes allowing magnitude comparison).
*
* @param integer the current Unix timestamp
* @return integer the current date in a four byte DOS format
* @access private
*/
function unix2DosTime($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) | ($timearray['seconds'] >> 1);
} // end of the 'unix2DosTime()' method
//-------------------------------------------------------------------
// METHOD: addFile()
//-------------------------------------------------------------------
/**
* Adds "file" to archive
*
* @param string file contents
* @param string name of the file in the archive (may contains the path)
* @param integer the current timestamp
*
* @access public
*/
function addFile($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)
$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;
$new_offset = strlen(implode('', $this->datasec));
// 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 = $new_offset;
$cdrec .= $name;
//store this information to add to the headers for downloading
$this->compressed_file_size = $c_len;
// optional extra field, file comment goes here
// save to central directory
$this -> ctrl_dir[] = $cdrec;
} // end of the 'addFile()' method
//-------------------------------------------------------------------
// METHOD: getFile()
//-------------------------------------------------------------------
/**
* Dumps out file
*
* @return string the zipped file
* @access public
*/
function getFile()
{
$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
?>