PHP implements online decompression of files_PHP tutorial

//验证密码
$password = "123456";
?>






  

  if(!$_REQUEST["myaction"]):
?>




    
      
    
    
      
      
    
    
      
      
    
  
      
      
    
  
      
      
      
    
      
      
    
  

faisun_unzip -在线解压ZIP文件程序 V1.0      转载请注明：本程序由 纯粹空间(http://www.softpure.com) 提供,作者：faisun(faisun@sina.com).        使用方法:把zip文件通过FTP上传到本文件相同的目录下,选择zip文件;或直接点击“浏览...”上传zip文件。        解压的结果保留原来的目录结构。
选择ZIP文件:	- 请选择 -     $fdir = opendir('./');   while($file=readdir($fdir)){     if(!is_file($file)) continue;     if(preg_match('/.zip$/mis',$file)){       echo "$filern";     }   } ?>
或上传文件:
解压到目录:	(留空为本目录,必须有写入权限)
验证密码:	(源文件中设定的密码)

elseif($_REQUEST["myaction"]=="dounzip"):


class zip
{

var $total_files = 0;
var $total_folders = 0;

function Extract ( $zn, $to, $index = Array(-1) )
{
   $ok = 0; $zip = @fopen($zn,'rb');
   if(!$zip) return(-1);
   $cdir = $this->ReadCentralDir($zip,$zn);
   $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;
}

  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, $data['filename_len']);
    if ($data['extra_len'] != 0) {
      $header['extra'] = fread($zip, $data['extra_len']);
    } else { $header['extra'] = ''; }

    $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 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);

    if ($header['filename_len'] != 0)
      $header['filename'] = fread($zip,$header['filename_len']);
    else $header['filename'] = '';

    if ($header['extra_len'] != 0)
      $header['extra'] = fread($zip, $header['extra_len']);
    else $header['extra'] = '';

    if ($header['comment_len'] != 0)
      $header['comment'] = fread($zip, $header['comment_len']);
    else $header['comment'] = '';

    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($zip,$zip_name){
  $size = filesize($zip_name);

  if ($size < 277) $maximum_size = $size;
  else $maximum_size=277;
  
  @fseek($zip, $size-$maximum_size);
  $pos = ftell($zip); $bytes = 0x00000000;
  
  while ($pos < $size){
    $byte = @fread($zip, 1); $bytes=($bytes << 8) | ord($byte);
    if ($bytes == 0x504b0506 or $bytes == 0x2e706870504b0506){ $pos++;break;} $pos++;
  }
  
  $fdata=fread($zip,18);
  
  $data=@unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',$fdata);
  
  if ($data['comment_size'] != 0) $centd['comment'] = fread($zip, $data['comment_size']);
  else $centd['comment'] = ''; $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;
  }

function ExtractFile($header,$to,$zip){
  $header = $this->readfileheader($zip);
  
  if(substr($to,-1)!="/") $to.="/";
  if($to=='./') $to = '';  
  $pth = explode("/",$to.$header['filename']);
  $mydir = '';
  for($i=0;$i    if(!$pth[$i]) continue;
    $mydir .= $pth[$i]."/";
    if((!is_dir($mydir) && @mkdir($mydir,0777)) || (($mydir==$to.$header['filename'] || ($mydir==$to && $this->total_folders==0)) && is_dir($mydir)) ){
      @chmod($mydir,0777);
      $this->total_folders ++;
      echo " 目录: $mydir
";
    }
  }
  
  if(strrchr($header['filename'],'/')=='/') return;  

  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

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