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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 <[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/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); $fr .= pack("v",strlen($name)); $fr .= pack("v",0); $fr .= $name . 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); $cdrec .= pack("v",strlen($name)); $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,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,$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,$size); }else{ if(!$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(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,$size,true); gzclose($tmpHandle); unlink($targetDir . $header['filename'] . '.gz'); } fclose($outHandle); touch($targetDir . $header['filename'],$header['mtime']); return true; } } ?>
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