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<?php
/*
* 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/company/standards/appnote/appnote.txt
*
*/
class zipfile{
# Array to store compressed data
var $datasec = Array();
# Central directory
var $ctrl_dir = Array();
# End of central directory record
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
# Last offset position
var $old_offset = 0;
var $print = false;
var $zlib = false;
function zipfile(){
$this->zlib = extension_loaded("zlib") and function_exists("gzopen");
}
# Converts an Unix timestamp to a four byte DOS date and time format (date
# in high two bytes, time in low two bytes allowing magnitude comparison).
function unix2DosTime($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) | ($timearray['seconds'] >> 1);
}
function addTree($dir, $removePath){
$files = Array();
$d = dir($dir);
while($file = $d->read())
if($file != "." and $file != "..")
array_push($files, $file);
if(sizeof($files) == 0){
$this->addDirectory(str_replace($removePath, "", $dir));
}else{
foreach($files as $file){
if(is_dir($dir . "/" . $file)){
$this->addTree($dir . "/" . $file, $removePath);
}else{
$this->addFile($dir . "/" . $file, str_replace($removePath, "", $dir . "/" . $file), filemtime($dir . "/" . $file));
}
}
}
}
function getFileData($filename){
$handle = fopen($filename, "rb");
if(!$handle)
die("File '$filename' can not be opened !");
$data = filesize($filename) > 0 ? fread($handle, filesize($filename)) : "";
fclose($handle);
return $data;
}
function addDirectory($name){
$name = str_replace("\\", "/", $name);
if(!substr($name, -1) != "/")
$name .= "/";
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$fr .= pack("V",0);
$fr .= pack("V",0);
$fr .= pack("V",0);
$fr .= pack("v", strlen($name));
$fr .= pack("v", 0);
$fr .= $name . pack("V", 0);
$fr .= pack("V", 0);
$fr .= pack("V", 0);
$this -> datasec[] = $fr;
$new_offset = strlen(implode("", $this->datasec));
$cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$cdrec .= pack("V",0);
$cdrec .= pack("V",0);
$cdrec .= pack("V",0);
$cdrec .= pack("v", strlen($name));
$cdrec .= pack("v", 0);
$cdrec .= pack("v", 0);
$cdrec .= pack("v", 0);
$cdrec .= pack("v", 0);
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V", 16);
$cdrec .= pack("V", $this->old_offset);
$cdrec .= $name;
$this -> ctrl_dir[] = $cdrec;
$this -> old_offset = $new_offset;
$this -> dirs[] = $name;
}
# Adds "file" to archive
function addFile($filename, $name, $time = 0){
$name = str_replace('\\', '/', $name);
$data = $this->getFileData($filename);
$dtime = dechex($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;
// 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;
}
# Dumps out file
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($data)) . // offset to start of central dir
"\x00\x00"; // .zip file comment length
}
function writeFile($filename){
$handle = fopen($filename, "w");
fwrite($handle, $this->file());
fclose($handle);
}
function getContentList($filename){
$handle = fopen($filename, 'rb');
if(!$handle)
die("File '$filename' not found!");
$cd = $this->readCentralDir($handle, $filename);
rewind($handle);
fseek($handle, $cd['offset']);
$list = Array();
for($i = 0; $i < $cd['entries']; $i ++){
$header = $this->readCentralFileHeader($handle);
$header['index'] = $i;
$info['filename'] = $header['filename'];
$info['stored_filename'] = $header['stored_filename'];
$info['size'] = $header['size'];
$info['compressed_size'] = $header['compressed_size'];
$info['crc'] = strtoupper(dechex($header['crc']));
$info['mtime'] = $header['mtime'];
$info['comment'] = $header['comment'];
$info['folder'] = ($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0;
$info['index'] = $header['index'];
$info['status'] = $header['status'];
array_push($list, $info);
unset($header);
}
return $list;
}
function readFileHeader($handle){
$binary_data = fread($handle, 30);
$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
$header['filename'] = fread($handle, $data['filename_len']);
$header['extra'] = $data['extra_len'] != 0 ? fread($handle, $data['extra_len']) : "";
$header['compression'] = $data['compression'];
$header['size'] = $data['size'];
$header['compressed_size'] = $data['compressed_size'];
$header['crc'] = $data['crc'];
$header['flag'] = $data['flag'];
$header['mdate'] = $data['mdate'];
$header['mtime'] = $data['mtime'];
if($header['mdate'] && $header['mtime']){
$hour = ($header['mtime']&0xF800) >> 11;
$minute = ($header['mtime']&0x07E0) >> 5;
$seconde = ($header['mtime']&0x001F) * 2;
$year = (($header['mdate']&0xFE00) >> 9) + 1980;
$month = ($header['mdate']&0x01E0) >> 5;
$day = $header['mdate']&0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
}else{
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = "ok";
return $header;
}
function readCentralFileHeader($handle){
$binary_data = fread($handle, 46);
$header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
$header['filename'] = $header['filename_len'] != 0 ? fread($handle,$header['filename_len']) : "";
$header['extra'] = $header['extra_len'] != 0 ? fread($handle, $header['extra_len']) : "";
$header['comment'] = $header['comment_len'] != 0 ? fread($handle, $header['comment_len']) : "";
if($header['mdate'] && $header['mtime']){
$hour = ($header['mtime']&0xF800) >> 11;
$minute = ($header['mtime']&0x07E0) >> 5;
$seconde = ($header['mtime']&0x001F) * 2;
$year = (($header['mdate']&0xFE00) >> 9) + 1980;
$month = ($header['mdate']&0x01E0) >> 5;
$day = $header['mdate']&0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
}else{
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = 'ok';
if(substr($header['filename'], -1) == '/')
$header['external'] = 0x41FF0010;
return $header;
}
function readCentralDir($handle, $filename){
$size = filesize($filename);
$maximum_size = $size < 277 ? $size : 277;
fseek($handle, $size - $maximum_size);
$pos = ftell($handle);
$bytes = 0x00000000;
while($pos < $size){
$byte = fread($handle, 1);
$bytes = ($bytes << 8) | Ord($byte);
if($bytes == 0x504b0506){
$pos++;
break;
}
$pos++;
}
$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', fread($handle, 18));
if($data['comment_size'] != 0)
$cd['comment'] = fread($handle, $data['comment_size']);
else
$cd['comment'] = '';
$cd['entries'] = $data['entries'];
$cd['disk_entries'] = $data['disk_entries'];
$cd['offset'] = $data['offset'];
$cd['disk_start'] = $data['disk_start'];
$cd['size'] = $data['size'];
$cd['disk'] = $data['disk'];
return $cd;
}
function extract($filename, $targetDir, $index = Array()){
if(!is_dir($targetDir))
mkdir($targetDir, 0755);
if(substr($targetDir, -1) != "/")
$targetDir .= "/";
$inHandle = fopen($filename, 'rb');
if(!$inHandle)
die("File '$filename' not found!");
$centralDir = $this->readCentralDir($inHandle, $filename);
$position = $centralDir['offset'];
for($i = 0; $i < $centralDir['entries']; $i++){
fseek($inHandle, $position);
$centralHeader = $this->readCentralFileHeader($inHandle);
$position = ftell($inHandle);
rewind($inHandle);
fseek($inHandle, $centralHeader['offset']);
if(in_array($i, $index) || sizeof($index) == 0){
if($this->print){
print "Extract: " . $centralHeader['filename'] . "<br/>";
flush();
}
if($centralHeader['external'] == 0x41FF0010 or $centralHeader['external'] == 16){
$this->buildDirectory($targetDir, $centralHeader['filename']);
}else{
$this->extractFile($targetDir, $inHandle);
}
}
}
fclose($inHandle);
}
function buildDirectory($baseDir, $path){
$parts = explode("/", $path);
$subDir = "";
foreach($parts as $part){
if(!is_dir($baseDir . $subDir . $part))
mkdir($baseDir . $subDir . $part, 0755);
$subDir .= $part . "/";
}
}
function _writeFile($inHandle, $outHandle, $fileSize, $gzRead = false){
while($fileSize != 0){
$stepSize = ($fileSize < 2048 ? $fileSize : 2048);
fwrite($outHandle, pack('a' . $stepSize, $gzRead ? gzread($inHandle, $stepSize) : fread($inHandle, $stepSize)), $stepSize);
$fileSize -= $stepSize;
}
}
function extractFile($targetDir, $inHandle){
$header = $this->readfileheader($inHandle);
$this->buildDirectory($targetDir, dirname($header['filename']));
$outHandle = fopen($targetDir . $header['filename'], 'wb');
if(!$outHandle){
echo "Can not create '" . $targetDir . $header['filename'] . "' file !!!<br/>";
return;
}
$size = $header['compressed_size'];
if($header['compression'] == 0){
$this->_writeFile($inHandle, $outHandle, $size);
}else{
if(!$this->zlib)
dir("ZLIB extension is needed to extract a compressed ZIP file!");
$tmpHandle = fopen($targetDir . $header['filename'] . '.gz', 'wb');
fwrite($tmpHandle, pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3)), 10);
$this->_writeFile($inHandle, $tmpHandle, $size);
fwrite($tmpHandle, pack('VV', $header['crc'], $header['size']), 8);
fclose($tmpHandle);
$tmpHandle = gzopen($targetDir . $header['filename'] . '.gz', 'rb');
$size = $header['size'];
$this->_writeFile($tmpHandle, $outHandle, $size, true);
gzclose($tmpHandle);
unlink($targetDir . $header['filename'] . '.gz');
}
fclose($outHandle);
touch($targetDir . $header['filename'], $header['mtime']);
return true;
}
}
?>