项目地址
https://github.com/yiisoft/yii2-redis/blob/master/docs/guide/README.md
1、add "yiisoft/yii2-redis":"~2.0.0" to the require section of your composer.json
2、运行 ：
composer install
3、编辑配置文件 web.php
//....
'components' => [
'redis' => [
'class'=>'yii\redis\Connection',
'hostname'=>'localhost',
'port'=>6379,
'database'=>0,
],
]
