WordPress Figure,& Figcaption

add_filter('img_caption_shortcode', 'tiny_img_caption_shortcode_filter',10,3);
function tiny_img_caption_shortcode_filter($val, $attr, $content = null) {
  extract(shortcode_atts(array(
    'id'  => '',
    'align' => '',
    'width' => '',
    'caption' => ''
  ), $attr));

  if ( 1 > (int) $width || empty($caption) )
    return $val;

  preg_match('/(size\-[^ ",]+)/', $content,$m);
  return '<figure id="' . $id . '" class="wp-caption ' . esc_attr($align) . ' '.$m[0].' align-'.$align.'" style="width: ' . $width . 'px;">'
  . do_shortcode( $content ) . '<figcaption class="wp-caption-text">' . $caption . '</figcaption></figure>';
}