YII框架http缓存操作示例

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 frontendcontrollers;
use yii;
use yiiwebController;
class HttpcacheController extends Controller
{
  public function behaviors()//先于action执行,可以用来实现页面缓存
  {
    return [
      [
        'class'= 'yiifiltersHttpCache',//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>