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<?
class dZip{
var $filename;
var $overwrite;
var $zipSignature = "\x50\x4b\x03\x04"; // local file header signature
var $dirSignature = "\x50\x4b\x01\x02"; // central dir header signature
var $dirSignatureE= "\x50\x4b\x05\x06"; // end of central dir signature
var $files_count = 0;
var $fh;
Function dZip($filename, $overwrite=true){
$this->filename = $filename;
$this->overwrite = $overwrite;
}
Function addDir($dirname, $fileComments=''){
if(substr($dirname, -1) != '/')
$dirname .= '/';
$this->addFile(false, $dirname, $fileComments);
}
Function addFile($filename, $cfilename, $fileComments='', $data=false){
if(!($fh = &$this->fh))
$fh = fopen($this->filename, $this->overwrite?'wb':'a+b');
// $filename can be a local file OR the data wich will be compressed
if(substr($cfilename, -1)=='/'){
$details['uncsize'] = 0;
$data = '';
}
elseif(file_exists($filename)){
$details['uncsize'] = filesize($filename);
$data = file_get_contents($filename);
}
elseif($filename){
echo "<b>Cannot add $filename. File not found</b><br>";
return false;
}
else{
$details['uncsize'] = strlen($filename);
// DATA is given.. use it! :|
}
// if data to compress is too small, just store it
if($details['uncsize'] < 256){
$details['comsize'] = $details['uncsize'];
$details['vneeded'] = 10;
$details['cmethod'] = 0;
$zdata = &$data;
}
else{ // otherwise, compress it
$zdata = gzcompress($data);
$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug (thanks to Eric Mueller)
$details['comsize'] = strlen($zdata);
$details['vneeded'] = 10;
$details['cmethod'] = 8;
}
$details['bitflag'] = 0;
$details['crc_32'] = crc32($data);
// Convert date and time to DOS Format, and set then
$lastmod_timeS = str_pad(decbin(date('s')>=32?date('s')-32:date('s')), 5, '0', STR_PAD_LEFT);
$lastmod_timeM = str_pad(decbin(date('i')), 6, '0', STR_PAD_LEFT);
$lastmod_timeH = str_pad(decbin(date('H')), 5, '0', STR_PAD_LEFT);
$lastmod_dateD = str_pad(decbin(date('d')), 5, '0', STR_PAD_LEFT);
$lastmod_dateM = str_pad(decbin(date('m')), 4, '0', STR_PAD_LEFT);
$lastmod_dateY = str_pad(decbin(date('Y')-1980), 7, '0', STR_PAD_LEFT);
# echo "ModTime: $lastmod_timeS-$lastmod_timeM-$lastmod_timeH (".date("s H H").")\n";
# echo "ModDate: $lastmod_dateD-$lastmod_dateM-$lastmod_dateY (".date("d m Y").")\n";
$details['modtime'] = bindec("$lastmod_timeH$lastmod_timeM$lastmod_timeS");
$details['moddate'] = bindec("$lastmod_dateY$lastmod_dateM$lastmod_dateD");
$details['offset'] = ftell($fh);
fwrite($fh, $this->zipSignature);
fwrite($fh, pack('s', $details['vneeded'])); // version_needed
fwrite($fh, pack('s', $details['bitflag'])); // general_bit_flag
fwrite($fh, pack('s', $details['cmethod'])); // compression_method
fwrite($fh, pack('s', $details['modtime'])); // lastmod_time
fwrite($fh, pack('s', $details['moddate'])); // lastmod_date
fwrite($fh, pack('V', $details['crc_32'])); // crc-32
fwrite($fh, pack('I', $details['comsize'])); // compressed_size
fwrite($fh, pack('I', $details['uncsize'])); // uncompressed_size
fwrite($fh, pack('s', strlen($cfilename))); // file_name_length
fwrite($fh, pack('s', 0)); // extra_field_length
fwrite($fh, $cfilename); // file_name
// ignoring extra_field
fwrite($fh, $zdata);
// Append it to central dir
$details['external_attributes'] = (substr($cfilename, -1)=='/'&&!$zdata)?16:32; // Directory or file name
$details['comments'] = $fileComments;
$this->appendCentralDir($cfilename, $details);
$this->files_count++;
}
Function setExtra($filename, $property, $value){
$this->centraldirs[$filename][$property] = $value;
}
Function save($zipComments=''){
if(!($fh = &$this->fh))
$fh = fopen($this->filename, $this->overwrite?'w':'a+');
$cdrec = "";
foreach($this->centraldirs as $filename=>$cd){
$cdrec .= $this->dirSignature;
$cdrec .= "\x0\x0"; // version made by
$cdrec .= pack('v', $cd['vneeded']); // version needed to extract
$cdrec .= "\x0\x0"; // general bit flag
$cdrec .= pack('v', $cd['cmethod']); // compression method
$cdrec .= pack('v', $cd['modtime']); // lastmod time
$cdrec .= pack('v', $cd['moddate']); // lastmod date
$cdrec .= pack('V', $cd['crc_32']); // crc32
$cdrec .= pack('V', $cd['comsize']); // compressed filesize
$cdrec .= pack('V', $cd['uncsize']); // uncompressed filesize
$cdrec .= pack('v', strlen($filename)); // file comment length
$cdrec .= pack('v', 0); // extra field length
$cdrec .= pack('v', strlen($cd['comments'])); // file comment length
$cdrec .= pack('v', 0); // disk number start
$cdrec .= pack('v', 0); // internal file attributes
$cdrec .= pack('V', $cd['external_attributes']); // internal file attributes
$cdrec .= pack('V', $cd['offset']); // relative offset of local header
$cdrec .= $filename;
$cdrec .= $cd['comments'];
}
$before_cd = ftell($fh);
fwrite($fh, $cdrec);
// end of central dir
fwrite($fh, $this->dirSignatureE);
fwrite($fh, pack('v', 0)); // number of this disk
fwrite($fh, pack('v', 0)); // number of the disk with the start of the central directory
fwrite($fh, pack('v', $this->files_count)); // total # of entries "on this disk"
fwrite($fh, pack('v', $this->files_count)); // total # of entries overall
fwrite($fh, pack('V', strlen($cdrec))); // size of central dir
fwrite($fh, pack('V', $before_cd)); // offset to start of central dir
fwrite($fh, pack('v', strlen($zipComments))); // .zip file comment length
fwrite($fh, $zipComments);
fclose($fh);
}
// Private
Function appendCentralDir($filename,$properties){
$this->centraldirs[$filename] = $properties;
}
}