function createthumb( $pathToImages, $pathToThumbs, $thumbWidth )
{
  $ext = substr($filename, strrpos($filename, '.') + 1);
  $dir = opendir( $pathToImages );
  while (false !== ($fname = readdir( $dir ))) {
    $info = pathinfo($pathToImages . $fname);
    $ext = strtolower($ext);
    if ( strtolower($info['extension']) == 'jpg'||strtolower($info['extension']) == 'jpeg'||strtolower($info['extension']) == 'gif'||strtolower($info['extension']) == 'png' )
    {
switch($ext) {
case "jpg":
      $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
      break;
case "jpeg":
      $img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
      break;
case "gif":
      $img = imagecreatefromgif( "{$pathToImages}{$fname}" );
      break;
case "png":
      $img = imagecreatefrompng( "{$pathToImages}{$fname}" );
      break;
}
echo $img;
      $width = imagesx( $img );
      $height = imagesy( $img );
      $new_width = $thumbWidth;
      $new_height = floor( $height * ( $thumbWidth / $width ) );
      $tmp_img = imagecreatetruecolor( $new_width, $new_height );
      imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );
      imagejpeg( $tmp_img, $pathToThumbs );
    }
  }
  closedir( $dir );
}