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專用header('Cache-Control: post-chedk=0, pre-check=0', false);//for HTTP/1.0header('Pragma: no-cache');

<?php/** * Created by PhpStorm. * Date: 2016/5/25 * Time: 20:17 * http 緩存 */namespace frontend/controllers;use yii;use yii/web/Controller;class HttpcacheController extends Controller{  public function behaviors()//先于action執行,可以用來實現頁面緩存  {    return [      [        'class'=>'yii/filters/HttpCache',//整個頁面緩存        'lastModified'=>function(){          return filemtime('hw.txt');          //return 22221231231231;//可以在每次修改數據時，記入緩存，從緩存讀取        },        'etagSeed'=>function(){          $fp = fopen('hw.txt','r');//hw.txt在web的根目錄下          $title = fgets($fp);//讀取第一行          fclose($fp);          return $title;          //return 'etagseed2123123';//內容        },      ]    ];  }  public function actionIndex()  {    $content = file_get_contents('hw.txt');    return $this->renderPartial("index",['new'=>$content]);  }}

<?php/** * Created by PhpStorm. * Date: 2016/5/25 * Time: 20:19 */?><div>  <div>這是http緩存頁面</div>  <p><?= $new;?></p></div>