How can I retrieve a list of a Wordpress page's sibling pages?

Question

I am trying to create a list of sibling pages (not posts) in WordPress to populate a page\'s sidebar. The code I\'ve written successfully returns a page\'s parent\'s title.

Answer 1

Some of the answers on this page have slightly outdated info. Namely, exclude no longer seems to be needed when using child_of.

Here's my solution:

// if this is a child page of another page,
// get the parent so we can show only the siblings
if ($post->post_parent) $parent = $post->post_parent;
// otherwise use the current post ID, which will show child pages instead
else $parent = $post->ID;

// wp_list_pages only outputs 
 elements, don't for get to add a 

echo '
';

wp_list_pages(array(
    'child_of'=>$parent,
    'sort_column'=>'menu_order', // sort by menu order to enable custom sorting
    'title_li'=> '', // get rid of the annoying top level "Pages" title element
));

echo '
';