Drupal 7 ~ Retrieve last page nid

gistfile1.aw

template.php template_preprocess_page()
<?php
if ($node->type == 'page') {
   $result = db_query("SELECT nid FROM {node} WHERE type = 'page' AND status=1 ORDER BY created DESC LIMIT 1");
  $arr = $result->fetchAssoc();
  $variables['last_page_nid'] = $arr['nid'];
}
?>


templates/page.tpl.php
<?php
print $last_page_nid;
?>