wp list pages with permalinks

Hi,

I’m working with wordpress as a cms so I only have pages and not posts. On my pages I also have permalinks switched on so my pages don’t have ID’s anymore they have actual names.

My problem is I want to list all sub-pages of a parent page and currently I can’t seem to get my code to work correctly. I’m using a plugin to execute the php in a page (exec-php I believe).

<?php
// use wp_list_pages to display parent and all child pages all generations (a tree with parent)
$parent = [what do I put here???];
$args=array(
  'child_of' => $parent
);
$pages = get_pages($args);
if ($pages) {
  $pageids = array();
  foreach ($pages as $page) {
    $pageids[]= $page->ID;
  }

  $args=array(
    'title_li' => 'Tree of Parent Page ' . $parent,
    'include' =>  $parent . ',' . implode(",", $pageids)
  );
  wp_list_pages($args);
}
?>

This is the code I’m using straight from the WordPress documentation. If I replace ‘What do I put here?’ with a 0 it displays all my pages of the site.

Help much needed tnanks.

DD