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<?php
/**
文件名: Zip.class.php
作用: zip相关功能
开发: 星模团队www.xingmo.com
时间: 2009-10-1
更新: 2009-10-1
*/
class Zip
{
var $datasec, $ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0; var $dirs = Array(".");

function get_List($zip_name)
{
   $ret = ”;
   $zip = @fopen($zip_name, ‘rb’);
   if(!$zip)
   {
    return(0);
   }
   $centd = $this->ReadCentralDir($zip,$zip_name);
   @rewind($zip);
   @fseek($zip, $centd[‘offset’]);
   for ($i=0; $i<$centd[‘entries’]; $i++)
   {
    $header = $this->ReadCentralFileHeaders($zip);
    $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’];
    $ret[]=$info; unset($header);
   }
   return $ret;
}

function Add($files,$compact)
{
   if(!is_array($files[0]))
   {
    $files=Array($files);
   }
   for($i=0;$files[$i];$i++)
   {
    $fn = $files[$i];
    if(!in_Array(dirname($fn[0]),$this->dirs))
    {
     $this->add_Dir(dirname($fn[0]));
    }
    if(basename($fn[0]))
    {
     $ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
    }
   }
   return $ret;
}

function get_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";
}

function add_dir($name)
{
   $name = str_replace("\\", "/", $name);
   $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
   $fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
   $fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).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";
   $cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
   $cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
   $ext = "\xff\xff\xff\xff";
   $cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;
   $this -> ctrl_dir[] = $cdrec;
   $this -> old_offset = $new_offset;
   $this -> dirs[] = $name;
}

//编译指定的文件为zip文件（filename可以为文件数组array、目录dir或单个文件file）
//it柏拉图增加的方法
function CompileZipFile($filename, $tozipfilename,$ftype=’dir’)
{
   if (@function_exists(‘gzcompress’))
   {
    if($ftype==’dir’)
    {
     $filelist = $this->ListDirFiles($filename);
    }
    else if($ftype==’file’)
    {
     $filelist[] = $filename;
    }
    else
    {
     $filelist = $filename;
    }
    $i = 0;
    if(count($filelist)>0)
    {
     foreach($filelist as $filename)
     {
      if (is_file($filename))
      {
       $i++;
       $fd = fopen ($filename, "r");
       if(filesize($filename)>0)
       {
        $content = fread($fd, filesize($filename));
       }
       else
       {
        $content = ‘ ‘;
       }
       fclose ($fd);

       //if (is_array($dir)) $filename = basename($filename);
       $this->add_File($content, $filename);
      }
     }
     $out = $this->get_file();
     $fp = fopen($tozipfilename, "w");
     fwrite($fp, $out, strlen($out));
     fclose($fp);
    }
    return $i;
   }
   else
   {
    return 0;
   }
}

//读取某文件夹的所有文件
function ListDirFiles($dirname)
{
   $files = array();
   if(is_dir($dirname))
   {
    $fh = opendir($dirname);
    while (($file = readdir($fh)) !== false)
    {
     if (strcmp($file, ‘.’)==0 || strcmp($file, ‘..’)==0)
     {
      continue;
     }
     $filepath = $dirname . ‘/’ . $file;
     if ( is_dir($filepath) )
     {
      $files = array_merge($files, $this->ListDirFiles($filepath));
     }
     else
     {
      array_push($files, $filepath);
     }
    }
    closedir($fh);
   }
   else
   {
    $files = false;
   }
   return $files;
}

function add_File($data, $name, $compact = 1)
{
   $name     = str_replace(‘\\’, ‘/’, $name);
   $dtime    = dechex($this->DosTime());

   $hexdtime = ‘\x’ . $dtime[6] . $dtime[7].’\x’.$dtime[4] . $dtime[5]
   . ‘\x’ . $dtime[2] . $dtime[3].’\x’.$dtime[0].$dtime[1];
   eval(‘$hexdtime = "’ . $hexdtime . ‘";’);
   if($compact)
   $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
   else
   {
    $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
   }
   $unc_len = strlen($data); $crc = crc32($data);
   if($compact)
   {
    $zdata = gzcompress($data); $c_len = strlen($zdata);
    $zdata = substr(substr($zdata, 0, strlen($zdata) – 4), 2);
   }
   else
   {
    $zdata = $data;
   }
   $c_len=strlen($zdata);
   $fr .= pack(‘V’, $crc).pack(‘V’, $c_len).pack(‘V’, $unc_len);
   $fr .= pack(‘v’, strlen($name)).pack(‘v’, 0).$name.$zdata;
   $fr .= pack(‘V’, $crc).pack(‘V’, $c_len).pack(‘V’, $unc_len);
   $this -> datasec[] = $fr;
   $new_offset        = strlen(implode(”, $this->datasec));
   if($compact)
   {
    $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
   }
   else
   {
    $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
   }
   $cdrec .= $hexdtime.pack(‘V’, $crc).pack(‘V’, $c_len).pack(‘V’, $unc_len);
   $cdrec .= pack(‘v’, strlen($name) ).pack(‘v’, 0 ).pack(‘v’, 0 );
   $cdrec .= pack(‘v’, 0 ).pack(‘v’, 0 ).pack(‘V’, 32 );
   $cdrec .= pack(‘V’, $this -> old_offset );
   $this -> old_offset = $new_offset;
   $cdrec .= $name;
   $this -> ctrl_dir[] = $cdrec;
   return true;
}

function DosTime()
{
   $timearray = getdate();
   if ($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);
}

//解压整个压缩包
//直接用 Extract 会有路径问题，本函数先从列表中获得文件信息并创建好所有目录然后才运行 Extract
function ExtractAll ( $zn, $to)
{
   if(substr($to,-1)!="/")
   {
    $to .= "/";
   }
   $files = $this->get_List($zn);
   $cn = count($files);
   if(is_array($files))
   {
    for($i=0;$i<$cn;$i++)
    {
     if($files[$i][‘folder’]==1)
     {
      @mkdir($to.$files[$i][‘filename’],$GLOBALS[‘cfg_dir_purview’]);
      @chmod($to.$files[$i][‘filename’],$GLOBALS[‘cfg_dir_purview’]);
     }
    }
   }
   $this->Extract ($zn,$to);
}

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($i=0; isset($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)
    {
     $pos++; break;
    }
    $pos++;
   }
   $data = @unpack(‘vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size’,fread($zip, 18));
   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);
   $header[‘external’] = (!isset($header[‘external’]) ? 0 : $header[‘external’]);
   if(substr($to,-1)!="/")
   {
    $to.="/";
   }
   if(!@is_dir($to))
   {
    @mkdir($to,$GLOBALS[‘cfg_dir_purview’]);
   }
   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;
}
}