真正的ZIP文件操作类(php)

            ReadCentralDir($zip,$zip_name);
    @rewind($zip);
    @fseek($zip, $centd['offset']);
   for ($i=0; $iReadCentralFileHeaders($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[] = $name;
}
function add_File($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'] > 1);
}
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; $iReadCentralFileHeaders($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 ($size readfileheader($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
打包文件下载
            
            
您可能感兴趣的文章:

php对gzip文件或者字符串解压实例参考

php zip文件解压类代码

将文件夹压缩成zip文件的php代码

php 解压rar文件及zip文件的方法

php调用nginx的mod_zip模块打包ZIP文件

php实现的zip文件内容比较类

php在线解压ZIP文件的方法

php操作（删除,提取,增加）zip文件方法详解

php生成zip文件类实例

php实现zip文件解压操作

php将文件夹打包成zip文件的简单实现方法

PHP读取zip文件的方法示例