Return Top Parent ID of Page/Post
February 19, 2014When you work with pages (or posts), sometimes you want to find a top parent ID of a current page or post. This can be useful, for example, if you want to show sub navigation in sidebar.
function top_parent(){ global $post; if ($post->post_parent) { $ancestors = get_post_ancestors($post->ID); $post_parent_id = array_pop($ancestors); return $post_parent_id; } else { return $post->ID; } }