wordpress-selling-point-sidemenu2

<?php
    //if the post has a parent
    if($post->post_parent){
    //collect ancestor pages
    $relations = get_post_ancestors($post->ID);
    //get child pages
    $result = $wpdb->get_results( "SELECT ID FROM wp_posts WHERE post_parent = $post->ID AND post_type='page'" );
    if ($result){
            foreach($result as $pageID){
                array_push($relations, $pageID->ID);
            }
    }
        //add current post to pages
        array_push($relations, $post->ID);
        //get comma delimited list of children and parents and self
        $relations_string = implode(",",$relations);
        //use include to list only the collected pages.
        $sidelinks = wp_list_pages("title_li=&echo=0&include=".$relations_string);
    }else {
        // display only main level and children
        $sidelinks = wp_list_pages("title_li=&echo=0&depth=3&child_of=".$post->ID);
    }

    if ($sidelinks) { ?>
        <ul class="left-nav">
                    <li><a class="stand-alone" href="<?php echo get_permalink(); ?>"><?php the_title(); ?></a></li>
            <?php //links in <li> tags
                echo $sidelinks; ?>
        </ul>
    <?php }
    else { ?>
        <ul class="left-nav">
                    <li><a class="stand-alone" href="<?php echo get_permalink(); ?>"><?php the_title(); ?></a></li>
                </ul>
         <?php } ?>