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超轻量级php框架startmvc

YII框架http缓存操作示例

更新时间:2020-04-04 17:54:01 作者:startmvc
本文实例讲述了YII框架http缓存操作。分享给大家供大家参考,具体如下:http禁止缓存原理h

本文实例讲述了YII框架http缓存操作。分享给大家供大家参考,具体如下:

http禁止缓存原理


header('Expires: 0');
header('Last-Modified: '. gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-store, no-cahe, must-revalidate');
//ie专用
header('Cache-Control: post-chedk=0, pre-check=0', false);
//for HTTP/1.0
header('Pragma: no-cache');

HttpcacheController.php

首先判断的是客户端lastModified,如果最后更新时间没有变化,就不会更新缓存,然后再判断etagSeed


<?php
/**
 * Created by PhpStorm.
 * Date: 2016/5/25
 * Time: 20:17
 * http 缓存
 */
namespace frontend\controllers;
use yii;
use yii\web\Controller;
class HttpcacheController extends Controller
{
 public function behaviors()//先于action执行,可以用来实现页面缓存
 {
 return [
 [
 'class'=>'yii\filters\HttpCache',//整个页面缓存
 'lastModified'=>function(){
 return filemtime('hw.txt');
 //return 22221231231231;//可以在每次修改数据时,记入缓存,从缓存读取
 },
 'etagSeed'=>function(){
 $fp = fopen('hw.txt','r');//hw.txt在web的根目录下
 $title = fgets($fp);//读取第一行
 fclose($fp);
 return $title;
 //return 'etagseed2123123';//内容
 },
 ]
 ];
 }
 public function actionIndex()
 {
 $content = file_get_contents('hw.txt');
 return $this->renderPartial("index",['new'=>$content]);
 }
}

httpcache/index.php


<?php
/**
 * Created by PhpStorm.
 * Date: 2016/5/25
 * Time: 20:19
 */
?>
<div>
 <div>这是http缓存页面</div>
 <p><?= $new;?></p>
</div>

YII框架 http缓存