[PHP] - 压缩与解压Zip(PHPZip类)

作者: 炎峰森林影
发布时间:2015-07-21 10:26:14

PHPZip类来源:网络

visitFile()函数来源:http://topic.csdn.net/u/20071225/11/e6a8db84-df02-4622-987b-2a4ed4a5eef0.html (第14楼)

注:修改为可遍历子文件夹(替换遍历方法为visitFile());

     添加GetZipComment()方法;

     加上用法说明(注释部分)。

 

 

<?php
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']));
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);

标签: php
来源:http://www.cnblogs.com/hcbin/archive/2010/08/11/1797488.html

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