$dirname = "c:/document_archive";
$dir = opendir($dirname);
while ($filename = readdir($dir))
{
  $fullpath = "$dirname/$filename";
  if (is_dir($fullpath))
    continue;
  $stat = stat($fullpath);  
  $size = $stat[7]; 
  $parts = explode('_', $filename);
  echo $parts[0] . "\r\n";
  echo $parts[1] . "\r\n";
  echo $parts[2] . "\r\n";
  echo $parts[3] . "\r\n";
  echo $parts[4] . "\r\n";
  echo $parts[5] . "\r\n";
  echo $size;    
}