Untitled

//in-gallery div
$photo_gallery_link = echo get_permalink($photo_page_id);
$photo_gallery_slug = echo get_post($photo_page_id);

function photo_in_gallery_shortcode( $atts, $content = null ) {
   extract( shortcode_atts( array(
      'photo_page_id' => '1',
      ), $atts ) );
   return "<div class="in-gallery"><p style="text-align: left;">Gallery: <a href="$photo_gallery_link">$photo_gallery_slug</a></p>" . $content . '</div>';
}

add_shortcode('photo_in_gallery', 'photo_in_gallery_shortcode');