Check if is child page, parent page or ancestor page

Check if is child page, parent page or ancestor page

/**
 * Check if is child page, parent page or ancestor page
 */
function is_in_heirarchy() {
    global $wp_query;
    if (empty($wp_query->post->post_parent)) {
        $parent = $wp_query->post->ID;
    } else {
        $parent = array_reverse(get_post_ancestors($post->ID));
        $parent = $parent[0];
    }
    if (wp_list_pages("title_li=&child_of=$parent&echo=0")) {
        return true;
    } else {
        return false;
    }
}