Wordpress Php: List Of Parent An Children In Sidebar

[dekraan]

Hi there!

 

I am currently trying to edit a wordpress theme, and with my limited knowledge, I got stuck first thing., I have just added a subpage to a page on my blog for the first time, and would love to display a list in the sidebar on the parent that displays the parent itself, and all children. On the childpages, this same list (parent+children) should be visible.

 

So, let's say I have a page called: contact, with subpages like 'route' and 'form', it should look like this, on the parentpage (contact) and the children:

 

Contact

Route

Form

 

On pages that do not have children, there should be no list.

 

Looking through the wordpress codex, I found the following code to add to my sidebar.php:

<?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
 $sidelinks = wp_list_pages("title_li=&echo=0&depth=1&child_of=".$post->ID);
}

if ($sidelinks) { ?>
 <h2><?php the_title(); ?></h2>
 <ul>
   <?php //links in <li> tags
   echo $sidelinks; ?>
 </ul>
<?php } ?>

This works perfect on a child page, displaying child and parent in a neat linkable list. But on the parent page it only displays the child. How can I also add the parent there?

 

Thank you in advance for your help!