<?php 
class AppController extends Controller {

     var $uses = array('Setting');

     function beforeFilter(){
	     //reads the site-wide config values from the DB and puts them through the Configure::write method
	     $this->Setting->getcfg();
     }

     function afterFilter(){
	     //retrieves the site-wide configurations from Configure::read($key) and puts it back into the db if new
	     $this->Setting->writecfg();
     }
}
?>