160726 smarty 笔记(2)

<?php
//取当前页
$p=1;
if(!empty($_GET["page"]))
{
$p=$_GET["page"];
}
//定义页面缓存文件的路径
$filename="../cache/0726huancun{$p}.html";
//定义缓存有效期
$cachetime=25;
//判断文件是否存在
if(!file_exists($filename) || filemtime($filename)+$cachetime<time())
{
//开启内存缓存
ob_start();
include ("../DBDA.php");
include ("../init.inc.php");
include ("page.class.php");
$db=new DBDA();
//取总条数
$szs = "select count(*) from car";
$zs = $db->StrQuery($szs);
//造分页对象
$page = new Page($zs,5);
$xinxi = $page->fpage();
//查询汽车表信息
$sql="select * from car ".$page->limit;
$attr=$db->Query($sql);
$smarty->assign("car",$attr);
$smarty->assign("xinxi",$xinxi);
$smarty->display("0726hcfy.html");
//从内存缓存中获取页面代码
$content=ob_get_contents();
//将获取到的内容放到缓存文件
file_put_contents($filename,$content);
//清理缓存
ob_flush();
echo "######################################";
}
else{
include($filename);
}