20    $zip = @fopen($zip_name, 'rb');
21    if(!$zip) return(0);
22    $centd = $this->ReadCentralDir($zip,$zip_name);
24     @rewind($zip);
25     @fseek($zip, $centd['offset']);
29     $header = $this->ReadCentralFileHeaders($zip);
177    $ok = 0; $zip = @fopen($zn,'rb');
178    if(!$zip) return(-1);
179    $cdir = $this->ReadCentralDir($zip,$zn);
190      @fseek($zip, $pos_entry);
191      $header = $this->ReadCentralFileHeaders($zip);
192      $header['index'] = $i; $pos_entry = ftell($zip);
193      @rewind($zip); fseek($zip, $header['offset']);
195       $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);
198    fclose($zip);
202   function ReadFileHeader($zip, $header)  argument
204     $binary_data = fread($zip, 30);
207     $header['filename'] = fread($zip, $data['filename_len']);
209       $header['extra'] = fread($zip, $data['extra_len']);
233  function ReadCentralFileHeaders($zip){  argument
234     $binary_data = fread($zip, 46);
238       $header['filename'] = fread($zip,$header['filename_len']);
242       $header['extra'] = fread($zip, $header['extra_len']);
246       $header['comment'] = fread($zip, $header['comment_len']);
268  function ReadCentralDir($zip,$zip_name)  argument
274   @fseek($zip, $size-$maximum_size);
275   $pos = ftell($zip); $bytes = 0x00000000;
279     $byte = @fread($zip, 1);
285         fread($zip, 18));
288     $centd['comment'] = fread($zip, $data['comment_size']);
296  function ExtractFile($header,$to,$zip)  argument
298    $header = $this->readfileheader($zip, $header);
327       $buffer = fread($zip, $read_size);
348      $buffer = fread($zip, $read_size);