PHPZip–php对文件压缩解压

<?php
/**
* Created by JetBrains PhpStorm.
* User: tuisiyuan
* Date: 13-11-15
* Time: 下午2:23
* To change this template use File | Settings | File Templates.
*/
class PHPZip {
private $ctrl_dir = array();
private $datasec = array();

/**********************************************************
* 压缩部分
**********************************************************/
// ------------------------------------------------------ //
// #遍历指定文件夹
//
// $archive  = new PHPZip();
// $filelist = $archive->visitFile(文件夹路径);
// print "当前文件夹的文件:<p>\r\n";
// foreach($filelist as $file)
//     printf("%s<br>\r\n", $file);
// ------------------------------------------------------ //
var $fileList = array();
public function visitFile($path) {
global $fileList;
$path = str_replace("\\", "/", $path);
$fdir = dir($path);

while(($file = $fdir->read()) !== false) {
if($file == '.' || $file == '..'){ continue; }

$pathSub    = preg_replace("*/{2,}*", "/", $path."/".$file);  // 替换多个反斜杠
$fileList[] = is_dir($pathSub) ? $pathSub."/" : $pathSub;
if(is_dir($pathSub)){ $this->visitFile($pathSub); }
}
$fdir->close();
return $fileList;
}

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;
$timearray['seconds'] = 0;
}
return (($timearray['year'] - 1980) << 25)
| ($timearray['mon'] << 21)
| ($timearray['mday'] << 16)
| ($timearray['hours'] << 11)
| ($timearray['minutes'] << 5)
| ($timearray['seconds'] >> 1);
}

var $old_offset = 0;
private function addFile($data, $filename, $time = 0) {
$filename = str_replace('\\', '/', $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";
$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);
$fr      .= pack('v', strlen($filename));
$fr      .= pack('v', 0);
$fr      .= $filename;

$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);
$cdrec .= pack('v', strlen($filename) );
$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 .= $filename;
$this->ctrl_dir[] = $cdrec;
}

var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
private 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";
}

// ------------------------------------------------------ //
// #压缩到服务器
//
// $archive = new PHPZip();
// $archive->Zip("需压缩的文件所在目录", "ZIP压缩文件名");
// ------------------------------------------------------ //
public function Zip($dir, $saveName) {
if(@!function_exists('gzcompress')){ return; }

ob_end_clean();
$filelist = $this->visitFile($dir);
if(count($filelist) == 0){ return; }

foreach($filelist as $file) {
if(!file_exists($file) || !is_file($file)){ continue; }

$fd = fopen($file, "rb");
$content = @fread($fd, filesize($file));
fclose($fd);

// 1.删除$dir的字符(./folder/file.txt删除./folder/)
// 2.如果存在/就删除(/file.txt删除/)
$file = substr($file, strlen($dir));
if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/"){ $file = substr($file, 1); }

$this->addFile($content, $file);
}
$out = $this->file();

$fp = fopen($saveName, "wb");
fwrite($fp, $out, strlen($out));
fclose($fp);
}

// ------------------------------------------------------ //
// #压缩并直接下载
//
// $archive = new PHPZip();
// $archive->ZipAndDownload("需压缩的文件所在目录");
// ------------------------------------------------------ //
public function ZipAndDownload($dir) {
if(@!function_exists('gzcompress')){ return; }

ob_end_clean();
$filelist = $this->visitFile($dir);
if(count($filelist) == 0){ return; }

foreach($filelist as $file) {
if(!file_exists($file) || !is_file($file)){ continue; }

$fd = fopen($file, "rb");
$content = @fread($fd, filesize($file));
fclose($fd);

// 1.删除$dir的字符(./folder/file.txt删除./folder/)
// 2.如果存在/就删除(/file.txt删除/)
$file = substr($file, strlen($dir));
if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/"){ $file = substr($file, 1); }

$this->addFile($content, $file);
}
$out = $this->file();

@header('Content-Encoding: none');
@header('Content-Type: application/zip');
@header('Content-Disposition: attachment ; filename=Farticle'.date("YmdHis", time()).'.zip');
@header('Pragma: no-cache');
@header('Expires: 0');
print($out);
}
/**********************************************************
* 解压部分
**********************************************************/
// ------------------------------------------------------ //
// ReadCentralDir($zip, $zipfile)
// $zip是经过@fopen($zipfile, 'rb')打开的
// $zipfile是zip文件的路径
// ------------------------------------------------------ //
private function ReadCentralDir($zip, $zipfile) {
$size     = filesize($zipfile);
$max_size = ($size < 277) ? $size : 277;

@fseek($zip, $size - $max_size);
$pos   = ftell($zip);
$bytes = 0x00000000;

while($pos < $size) {
$byte  = @fread($zip, 1);
$bytes = ($bytes << 8) | Ord($byte);
$pos++;
if($bytes == 0x504b0506){ break; }
}

$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', fread($zip, 18));

$centd['comment'] = ($data['comment_size'] != 0) ? fread($zip, $data['comment_size']) : '';  // 注释
$centd['entries'] = $data['entries'];
$centd['disk_entries'] = $data['disk_entries'];
$centd['offset'] = $data['offset'];
$centd['disk_start'] = $data['disk_start'];
$centd['size'] = $data['size'];
$centd['disk'] = $data['disk'];
return $centd;
}

private function ReadCentralFileHeaders($zip) {
$binary_data = fread($zip, 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($zip, $header['filename_len']) : '';
$header['extra']    = ($header['extra_len']    != 0) ? fread($zip, $header['extra_len'])    : '';
$header['comment']  = ($header['comment_len']  != 0) ? fread($zip, $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; }  // 判断是否文件夹
return $header;
}

private function ReadFileHeader($zip) {
$binary_data = fread($zip, 30);
$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

$header['filename']        = fread($zip, $data['filename_len']);
$header['extra']           = ($data['extra_len'] != 0) ? fread($zip, $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;
}

private function ExtractFile($header, $to, $zip) {
$header = $this->readfileheader($zip);

if(substr($to, -1) != "/"){ $to .= "/"; }
if(!@is_dir($to)){ @mkdir($to, 0777); }

$pth = explode("/", dirname($header['filename']));
$pthss = '';
for($i=0; isset($pth[$i]); $i++){
if(!$pth[$i]){ continue; }
$pthss .= $pth[$i]."/";
if(!is_dir($to.$pthss)){ @mkdir($to.$pthss, 0777); }
}

if(!($header['external'] == 0x41FF0010) && !($header['external'] == 16)) {
if($header['compression'] == 0) {
$fp = @fopen($to.$header['filename'], 'wb');
if(!$fp){ return(-1); }
$size = $header['compressed_size'];

while($size != 0) {
$read_size   = ($size < 2048 ? $size : 2048);
$buffer      = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}
fclose($fp);
touch($to.$header['filename'], $header['mtime']);

}else{

$fp = @fopen($to.$header['filename'].'.gz', 'wb');
if(!$fp){ return(-1); }
$binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));

fwrite($fp, $binary_data, 10);
$size = $header['compressed_size'];

while($size != 0) {
$read_size   = ($size < 1024 ? $size : 1024);
$buffer      = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}

$binary_data = pack('VV', $header['crc'], $header['size']);
fwrite($fp, $binary_data, 8);
fclose($fp);

$gzp = @gzopen($to.$header['filename'].'.gz', 'rb') or die("Cette archive est compress!");

if(!$gzp){ return(-2); }
$fp = @fopen($to.$header['filename'], 'wb');
if(!$fp){ return(-1); }
$size = $header['size'];

while($size != 0) {
$read_size   = ($size < 2048 ? $size : 2048);
$buffer      = gzread($gzp, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}
fclose($fp); gzclose($gzp);

touch($to.$header['filename'], $header['mtime']);
@unlink($to.$header['filename'].'.gz');
}
}
return true;
}

// ------------------------------------------------------ //
// #解压文件
//
// $archive   = new PHPZip();
// $zipfile   = "ZIP压缩文件名";
// $savepath  = "解压缩目录名";
// $zipfile   = $unzipfile;
// $savepath  = $unziptarget;
// $array     = $archive->GetZipInnerFilesInfo($zipfile);
// $filecount = 0;
// $dircount  = 0;
// $failfiles = array();
// set_time_limit(0);  // 修改为不限制超时时间(默认为30秒)
//
// for($i=0; $i<count($array); $i++) {
//     if($array[$i][folder] == 0){
//         if($archive->unZip($zipfile, $savepath, $i) > 0){
//             $filecount++;
//         }else{
//             $failfiles[] = $array[$i][filename];
//         }
//     }else{
//         $dircount++;
//     }
// }
// set_time_limit(30);
//printf("文件夹:%d    解压文件:%d    失败:%d<br>\r\n", $dircount, $filecount, count($failfiles));
//if(count($failfiles) > 0){
//    foreach($failfiles as $file){
//        printf("·%s<br>\r\n", $file);
//    }
//}
// ------------------------------------------------------ //
public function unZip($zipfile, $to, $index = Array(-1)) {
$ok  = 0;
$zip = @fopen($zipfile, 'rb');
if(!$zip){ return(-1); }

$cdir      = $this->ReadCentralDir($zip, $zipfile);
$pos_entry = $cdir['offset'];

if(!is_array($index)){ $index = array($index); }
for($i=0; $index[$i]; $i++) {
if(intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries']) {
return(-1);
}
}

for($i=0; $i<$cdir['entries']; $i++) {
@fseek($zip, $pos_entry);
$header          = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$pos_entry       = ftell($zip);
@rewind($zip);
fseek($zip, $header['offset']);
if(in_array("-1", $index) || in_array($i, $index)) {
$stat[$header['filename']] = $this->ExtractFile($header, $to, $zip);
}
}

fclose($zip);
return $stat;
}
/**********************************************************
* 其它部分
**********************************************************/
// ------------------------------------------------------ //
// #获取被压缩文件的信息
//
// $archive = new PHPZip();
// $array = $archive->GetZipInnerFilesInfo(ZIP压缩文件名);
// for($i=0; $i<count($array); $i++) {
//     printf("<b>·%s</b><br>\r\n", $array[$i][filename]);
//     foreach($array[$i] as $key => $value)
//         printf("%s => %s<br>\r\n", $key, $value);
//     print "\r\n<p>------------------------------------<p>\r\n\r\n";
// }
// ------------------------------------------------------ //
public function GetZipInnerFilesInfo($zipfile) {
$zip = @fopen($zipfile, 'rb');
if(!$zip){ return(0); }
$centd = $this->ReadCentralDir($zip, $zipfile);

@rewind($zip);
@fseek($zip, $centd['offset']);
$ret = array();

for($i=0; $i<$centd['entries']; $i++) {
$header          = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$info = array(
'filename'        => $header['filename'],                   // 文件名
'stored_filename' => $header['stored_filename'],            // 压缩后文件名
'size'            => $header['size'],                       // 大小
'compressed_size' => $header['compressed_size'],            // 压缩后大小
'crc'             => strtoupper(dechex($header['crc'])),    // CRC32
'mtime'           => date("Y-m-d H:i:s",$header['mtime']),  // 文件修改时间
'comment'         => $header['comment'],                    // 注释
'folder'          => ($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0,  // 是否为文件夹
'index'           => $header['index'],                      // 文件索引
'status'          => $header['status']                      // 状态
);
$ret[] = $info;
unset($header);
}
fclose($zip);
return $ret;
}
// ------------------------------------------------------ //
// #获取压缩文件的注释
//
// $archive = new PHPZip();
// echo $archive->GetZipComment(ZIP压缩文件名);
// ------------------------------------------------------ //
public function GetZipComment($zipfile) {
$zip = @fopen($zipfile, 'rb');
if(!$zip){ return(0); }
$centd = $this->ReadCentralDir($zip, $zipfile);
fclose($zip);
return $centd[comment];
}
}