$post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID' ))); foreach ($attachments as $k => $attachment) { if ($attachment->ID == $post->ID) { break; } } $k++; // If there is more than 1 attachment in a gallery if (count($attachments) > 1) { if (isset($attachments[ $k ])) { // get the URL of the next image attachment $next_attachment_url = get_attachment_link($attachments[ $k ]->ID); } else { // or get the URL of the first image attachment $next_attachment_url = get_attachment_link($attachments[ 0 ]->ID); } } else { // or, if there's only 1 image, get the URL of the image $next_attachment_url = wp_get_attachment_url(); } ?> ID, $attachment_size); ?>