<?php
/**
 * Defines the PreviousNext page type
 */
class PreviousNextPage extends Page {
   static $db = array(
   );
   static $has_one = array(
   );
}

class PreviousNextPage_Controller extends ContentController {

 public function nextPager() {
  $where = "ParentID = ($this->ParentID + 0) AND Sort > ($this->Sort + 0 )";
  $pages = DataObject::get("SiteTree", $where, "Sort", "", 1);
  if($pages) {
   foreach($pages as $page) {
    return $page;
   }
  }
 }
 public function previousPager() {
  $where = "ParentID = ($this->ParentID + 0) AND Sort < ($this->Sort + 0)";
  $pages = DataObject::get("SiteTree", $where, "Sort DESC", "", 1);
  if($pages) {
   foreach($pages as $page) {
    return $page;
   }
  }
 }
}

?>