yii2.0 Cache缓存

1.控制器中CacheDemoController.php

  1 <?php
  2 /**
  3  * Created by PhpStorm.
  4  * User: liangzi
  5  * Date: 2016/11/25
  6  * Time: 8:38
  7  */
  8 namespace app\controllers;
  9 
 10 use yii\web\Controller;
 11 
 12 class CacheDemoController extends Controller
 13 {
 14 /*    public function behaviors()
 15     {
 16         return [
 17             [
 18                 'class'=>'yii\filters\HttpCache',
 19                 'lastModified'=>function(){
 20                     return 124234;
 21                 },
 22                 'etagSeed'=>function(){
 23                     return 'etagseed23';
 24                 }
 25             ]
 26         ];
 27     }*/
 28 
 29     public function actionIndex(){
 30         //echo 'hello';die();
 31         $cache =\Yii::$app->cache;
 32         $data = $cache->get('key');
 33         if(!$data){
 34             $data = "h33e55533lo";
 35             $cache->set('key',$data,15);//保存缓存
 36             //$data=$cache->get('key');
 37         }
 38         return $this->render('index2', [
 39             'records' => $data,
 40         ]);
 41     }
 42 
 43     public function actionIndex3()
 44     {
 45         //$res =  \YII::$app->response;
 46         //Example 1 状态码
 47         //设置状态码 ：$res->statusCode = '404';
 48         /*
 49                 //对http头部的处理
 50                 $res->headers->add('pragma','no-cache');  //添加pragma
 51                 $res->headers->set('pragma','max-age-5'); //设置pragma的值为max-age-5
 52                 $res->headers->remove('pragma');       // 移除pragma的头部*/
 53 
 54         //跳转
 55         //$res->headers->add('location','http://www.baidu.com');
 56         //$res->headers->add('content-disposion','attachment');
 57 
 58 #-----------------------------------------------------------------
 59 
 60         //Example one
 61         //缓存技术
 62         //Ⅰ第一步 获取缓存组件
 63         $cache = \Yii::$app->cache;
 64 
 65         /*        //Ⅱ 第二步 往缓存中写数据
 66                $cache->add('key1','hello world!');
 67 
 68                 //Ⅳ 修改缓存数据
 69         //        $cache->set('key1','hello world2');
 70 
 71                 //Ⅴ 删除缓存数据
 72                 $cache->delete('key1');
 73 
 74                 // Ⅵ 清空数据
 75                 $cache->flush();*/
 76 
 77         //Ⅶ 设置缓存的有效期
 78         //方法一
 79         //$cache->add('key1','hello world',5);//缓存保存三秒
 80         //方法二
 81         //$cache->set('key1','hello world',5);//缓存设置3秒
 82 
 83 
 84         //Ⅲ 第三步 读取缓存中的数据
 85         //$data = $cache->get('key1');
 86         //print_r($data);
 87         //var_dump($data);
 88 
 89         //DB依赖
 90         /*        $dependency = new \yii\caching\DbDependency(
 91                     ['sql'=>'SELECT COUNT(*) FROM test']
 92                 );
 93                 $cache->add('db_key','hello world6',3,$dependency);
 94                 var_dump($cache->get('db_key'));*/
 95 
 96 
 97         // 案例
 98         $data = $cache->get('cache_data_key');
 99         if ($data === false) {
100             //这里我们可以操作数据库获取数据，然后通过$cache->set方法进行缓存
101             $cacheData = 'he3443o' ;
102             //set方法的第一个参数是我们的数据对应的key值，方便我们获取到
103             //第二个参数即是我们要缓存的数据
104             //第三个参数是缓存时间，如果是0，意味着永久缓存。默认是0
105             $cache->set('cache_data_key', $cacheData, 13);
106             $data = $cache->get('cache_data_key');
107         }
108 
109         return $this->render('index2', [
110             'records' => $data,
111         ]);
112 
113 
114     }
115 }

2.视图view/cache-demo/index.php 后边为index2

 1 <div class="container">
 2 <?php
 3 /**
 4  * Created by PhpStorm.
 5  * User: liangzi
 6  * Date: 2016/11/25
 7  * Time: 11:00
 8  */
 9 ?>
10 <?php
11 if($this->beginCache('cache')){
12 ?>
13 <div id="cache">
14     这里有缓存片段werwe
15 </div>
16 <?php
17     $this->endCache();
18 }
19 ?>
20 <div id="no-cache">
21     这里没有缓存片段ertre
22 </div>
23 </div>

index2.php

1 <div class="container">
2     <?php
3     echo $records;
4     ?>
5 </div>

index3.php

1 <div class="container">
2     <?php
3     echo $new;
4     ?>
5 </div>