<?php
/**
 * the purpose I added this class is to make the file system much flexible 
 * for customization.
 * Actually,  this is a kind of interface and you should modify it to fit your system
 * @author Logan Cai (cailongqun [at] yahoo [dot] com [dot] cn)
 * @link www.phpletter.com
 * @since 4/August/2007
 */
        class Auth
        {
        

        
                var $__loginIndexInSession = 'ajax_user';
                function __construct()
                {
                        
                }
                
                function Auth()
                {
                        $this->__construct();
                }
                /**
                 * check if the user has logged
                 *
                 * @return boolean
                 */
                function isLoggedIn() {
                
                    global $_SESSION;

                    if(isset($_SESSION['admin']['id']) && $_SESSION['admin']['id']!=0) {

                        return true;

                    } else {

                        return false;

                    }

         
                }
                /**
                 * validate the username & password
                 * @return boolean
                 *
                 */
                function login() {

                    global $_SESSION;
                    
                    if(isset($_SESSION['admin']['id']) && $_SESSION['admin']['id']!=0) {

                        return true;

                    } else {

                        return false;

                    }         
 
                
                }
        }
?>