yii2.0 Cache缓存

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 }

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>

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

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