Merchandise

add_filter('the_content', function ($content) { if (is_admin() || !is_page() || !in_the_loop() || !is_main_query()) return $content; $parent = get_page_by_path('playlists'); $current = get_post(); if (!$parent || !$current || (int) $current->post_parent !== (int) $parent->ID) return $content; $siblings = get_pages(array( 'parent' => $parent->ID, 'sort_column' => 'menu_order,post_title', 'post_status' => 'publish', )); $ids = wp_list_pluck($siblings, 'ID'); $total = count($ids); $i = array_search($current->ID, $ids); if ($i === false || $total < 2) return $content; $prev_id = $ids[($i - 1 + $total) % $total]; $next_id = $ids[($i + 1) % $total]; $html = ''; return $content . $html; });