<?php

class PHPZip
{
function Zip($dir,$zipfilename)
{
if (@function_exists('gzcompress'))
{
$curdir = getcwd();
if (is_array($dir)) 
{
$filelist = $dir;
}
else 
{
$filelist = $this ->GetFileList($dir);
}
if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
else chdir($curdir);
if (count($filelist)>0)
{
foreach($filelist as $filename)
{
if (is_file($filename))
{
$fd = fopen ($filename,'r');
$content = @fread ($fd,filesize ($filename));
fclose ($fd);
if (is_array($dir)) $filename = basename($filename);
$this ->addFile($content,$filename);
}
}
$out = $this ->file();
chdir($curdir);
$fp = fopen($zipfilename,'w');
fwrite($fp,$out,strlen($out));
fclose($fp);
}
return 1;
}
else return 0;
}
function GetFileList($dir)
{
if (file_exists($dir))
{
$args = func_get_args();
$pref = $args[1];
$dh = opendir($dir);
while($files = readdir($dh))
{
if (($files!='.')&&($files!='..')) 
{
if (is_dir($dir.$files)) 
{
$curdir = getcwd();
chdir($dir.$files);
$file = array_merge($file,$this ->GetFileList('',"$pref$files/"));
chdir($curdir);
}
else $file[]=$pref.$files;
}
}
closedir($dh);
}
return $file;
}
var $datasec      = array();
var $ctrl_dir     = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset   = 0;
function unix2DosTime($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;
$timearray['seconds'] = 0;
}
return (($timearray['year'] -1980) <<25) |($timearray['mon'] <<21) |($timearray['mday'] <<16) |
($timearray['hours'] <<11) |($timearray['minutes'] <<5) |($timearray['seconds'] >>1);
}
function addFile($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";
$fr   .= "\x00\x00";
$fr   .= "\x08\x00";
$fr   .= $hexdtime;
$unc_len = strlen($data);
$crc     = crc32($data);
$zdata   = gzcompress($data);
$c_len   = strlen($zdata);
$zdata   = substr(substr($zdata,0,strlen($zdata) -4),2);
$fr      .= pack('V',$crc);
$fr      .= pack('V',$c_len);
$fr      .= pack('V',$unc_len);
$fr      .= pack('v',strlen($name));
$fr      .= pack('v',0);
$fr      .= $name;
$fr .= $zdata;
$fr .= pack('V',$crc);
$fr .= pack('V',$c_len);
$fr .= pack('V',$unc_len);
$this ->datasec[] = $fr;
$new_offset        = strlen(implode('',$this->datasec));
$cdrec = "\x50\x4b\x01\x02";
$cdrec .= "\x00\x00";
$cdrec .= "\x14\x00";
$cdrec .= "\x00\x00";
$cdrec .= "\x08\x00";
$cdrec .= $hexdtime;
$cdrec .= pack('V',$crc);
$cdrec .= pack('V',$c_len);
$cdrec .= pack('V',$unc_len);
$cdrec .= pack('v',strlen($name) );
$cdrec .= pack('v',0 );
$cdrec .= pack('v',0 );
$cdrec .= pack('v',0 );
$cdrec .= pack('v',0 );
$cdrec .= pack('V',32 );
$cdrec .= pack('V',$this ->old_offset );
$this ->old_offset = $new_offset;
$cdrec .= $name;
$this ->ctrl_dir[] = $cdrec;
}
function file()
{
$data    = implode('',$this ->datasec);
$ctrldir = implode('',$this ->ctrl_dir);
return
$data .
$ctrldir .
$this ->eof_ctrl_dir .
pack('v',sizeof($this ->ctrl_dir)) .
pack('v',sizeof($this ->ctrl_dir)) .
pack('V',strlen($ctrldir)) .
pack('V',strlen($data)) .
"\x00\x00";
}
}

?>