Comments for PHP class and functions?

class Photos extends CI_Controller
{

      /**
       * 
       * Uploads a file
       *
       * @param string $file_name  description
       * @param string $new_name  description
       * @param integer $new_width  description
       * @param integer $new_height  description
       * @param string $directory  description
       * @return boolean
       */
      public function upload($file_name, $new_name, $new_width, new_$height, $directory)
      {

      }
}