4-1 header.php

<?php
session_start();
require_once 'function.php';
require_once 'smarty/libs/Smarty.class.php';
$smarty = new Smarty;
$db     = link_db();
//自動抓樣板檔
define('_PAGE_TPL', str_replace('.php', '.tpl', basename($_SERVER['PHP_SELF'])));