一 运行redis服务端

 

出现上图的图形,就说明redis服务端开启成功,并且开启了密码功能(如果不加载配置文件,连接redis是不需要密码的,这样,会给我们的程序带来很大隐患)

密码的设置: 在redis配置文件中,搜索requirepass ,后面设置密码  比如 : requirepass G506myredis

则表示此redis服务端密码是G506myredis

 

二 在php文件中操作redis

1. 查询

根据sql语句到redis数据库中查询是否有相应的数据,如果有,则直接返回数据,如果没有,则到数据库查询数据返回给浏览器,并且将数据缓存到redis服务器

代码:

function inquiry_redis($sql)
{//实例化redis对象$redis = new Redis();//连接redis$redis->connect('localhost',6379);//分配下面的任务密码权限$redis->auth('G506myredis');$key = md5($sql);$data = $redis->get($key);//如果有data,此时应该是一个json字符串if(!$data){try{$pdo = new PDO('mysql:dbname=test;host=localhost','root','root');}catch(PDOException $e){die("pdo连接失败:".$e->getMessage());}$stmt = $pdo->prepare($sql);$stmt->execute();$data = json_encode($stmt->fetchAll(2));//将从数据库取到的数据转化为json字符串(为了存储到redis中)$redis->set($key,$data);}return json_decode($data);//返回数组格式的数据}$sql = 'select id,name,edu,city,salary from student';
var_dump(inquiry_redis($sql));

 

 

结果:

 

array (size=39)0 => object(stdClass)[2]public 'id' =>  '1' (length=1)public 'name' =>  '周更生' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '山东省' (length=9)public 'salary' =>  '5000.00' (length=7)1 => object(stdClass)[3]public 'id' =>  '2' (length=1)public 'name' =>  '王小平' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '陕西省' (length=9)public 'salary' =>  '500.00' (length=6)2 => object(stdClass)[4]public 'id' =>  '3' (length=1)public 'name' =>  '周改娟' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '上海市' (length=9)public 'salary' =>  '8000.00' (length=7)3 => object(stdClass)[5]public 'id' =>  '4' (length=1)public 'name' =>  '高舸' (length=6)public 'edu' =>  '高中' (length=6)public 'city' =>  '山西省' (length=9) (size=39)0 => object(stdClass)[2]public 'id' =>  '1' (length=1)public 'name' =>  '周更生' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '山东省' (length=9)public 'salary' =>  '5000.00' (length=7)1 => object(stdClass)[3]public 'id' =>  '2' (length=1)public 'name' =>  '王小平' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '陕西省' (length=9)public 'salary' =>  '500.00' (length=6)2 => object(stdClass)[4]public 'id' =>  '3' (length=1)public 'name' =>  '周改娟' (length=9)public 'edu' =>  '大专' (length=6)public 'city' =>  '上海市' (length=9)public 'salary' =>  '8000.00' (length=7)3 => object(stdClass)[5]public 'id' =>  '4' (length=1)public 'name' =>  '高舸' (length=6)public 'edu' =>  '高中' (length=6)public 'city' =>  '山西省' (length=9)

第一次,从数据库取数据,将结果返回给浏览器,并将数据缓存到redis中

 

第二次,直接从redis中取数据,返回该浏览器

 

2. 删除

传进来一个sql,我们根据sql删除redis库中对应的key的数据

function delete_redis($sql)
{//实例化redis对象$redis = new Redis();//连接redis$redis->connect('localhost',6379);//分配下面的任务密码权限$redis->auth('G506myredis');$key = md5($sql);//删除对应的缓存的sql数据$redis->del($key);}

 

 ps: 期待在这方面有丰富项目经验的phper提出更多的优化意见,谢谢