$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 { // End if(). $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 ); ?>