/* $Id: zip.lib.PHP,v 1.1 2004/02/14 15:21:18 anoncvs_tusedb Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:
/**
* Zip file creation class.
* Makes zip files.
*
* Last Modification and Extension By :
*
* Hasin Hayder
* HomePage : www.hasinme.info
* Email : [email protected]
* IDE : PHP Designer 2005
*
*
* Originally Based on :
*
* http://www.zend.com/codex.PHP?id=535&single=1
* By Eric Mueller <[email protected]>
*
* http://www.zend.com/codex.PHP?id=470&single=1
* by Denis125 <[email protected]>
*
* a patch from Peter Listiak <[email protected]> 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
*
* @public array $datasec
*/
public $datasec = array();
/**
* Central directory
*
* @public array $ctrl_dir
*/
public $ctrl_dir = array();
/**
* End of central directory record
*
* @public string $eof_ctrl_dir
*/
public $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
/**
* Last offset position
*
* @public integer $old_offset
*/
public $old_offset = 0;
/**
* Converts an Unix timestamp to a four byte DOS date and time format (date
* in high two bytes,time in low two bytes allowing magnitude comparison).
*
* @param integer the current Unix timestamp
*
* @return integer the current date in a four byte DOS format
*
* @access private
*/
function unix2DosTime($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,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;
// 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($data)) . // offset to start of central dir
"\x00\x00"; // .zip file comment length
} // end of the 'file()' method
/**
* A Wrapper of original addFile Function
*
* Created By Hasin Hayder at 29th Jan,1:29 AM
*
* @param array An Array of files with relative/absolute path to be added in Zip File
*
* @access public
*/
function addFiles($files /*Only Pass Array*/)
{
foreach($files as $file)
{
if (is_file($file)) //directory check
{
$data = implode("",file($file));
$this->addFile($data,$file);
}
}
}
/**
* A Wrapper of original file Function
*
* Created By Hasin Hayder at 29th Jan,1:29 AM
*
* @param string Output file name
*
* @access public
*/
function output($file)
{
$fp=fopen($file,"w");
fwrite($fp,$this->file());
fclose($fp);
}
} // end of the 'zipfile' class
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