$width  = 100;
  $height = 75;
 
  list($width_orig, $height_orig) = getimagesize($target_path.$file2);
  if ($width && ($width_orig < $height_orig)) { $width = ($height / $height_orig) * $width_orig; }
  else { $height = ($width / $width_orig) * $height_orig; }