php操作redis实现朋友圈投票

╰半夏微凉° 2023-07-17 04:46 6阅读 0赞

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## php操作redis实现朋友圈投票 ##

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案例需求  
1：每人每天可投票一次  
2：有固定的被投票人

实现  
1.新建一个vote类，有user投票人和vote被投票人两个变量

use think\cache\driver\Redis;
    
    class Vote
    {
        public $user;//投票者
        public $vote;//被投票者
        function __construct($user = '', $vote = '')
        {
            $this->user = $user;
            $this->vote = $vote;
            $redis = new Redis();
            $this->redis = $redis;
        }
    
    //投票
    public function vote()
    {
        $num = $this->redis->get('user'.$this->user);//获取当前投票人是否投过票。
        if($num){
            return '今天投票过了';
        }
        $total = $this->redis->handler()->incr('vote'.$this->vote,1);//被投票人加一票数
        if($total){//投票成功，24小时内该人不可投票
            $this->redis->handler()->setex('user'.$this->user,86400,1);
        }
        return $total;
    }
    
    //获取投票记录
    public function getList()
    {
        $userList = $this->redis->get('userList');//获取所有投票人
        foreach ($userList as &$value){//遍历投票人
                $total = $this->redis->get('vote'.$value['id']);
                $value['num'] = intval($total);//把投票记录根据id给对应的被投票人
        }
        return $userList;
    }
    
    //被投票人
    public function voteUser()
    {
    	//创建一个被投票人数组
        $list = array(array('id'=>'1','name'=>'sea'),array('id'=>'2','name'=>'seai'),array('id'=>'3','name'=>'seaiio'),);
        $this->redis->set('userList',json_encode($list));
        $userList = $this->redis->get('userList');
        return $userList;
    }
    }

测试

1.创建一个vote类

$user = new Vote('seaiio',1);用户seaiio给id为1的人投票
    	  dump($user->voteUser());//获取被投票人的列表

结果

string(77) "[{"id":"1","name":"sea"},{"id":"2","name":"seai"},{"id":"3","name":"seaiio"}]"

2.投票

dump($user->vote());///执行两次。

结果

int(2)
    string(18) "今天投票过了"

3.查看投票记录

dump($user->getList());

结果

array(3) {
      [0] => array(3) {
        ["id"] => string(1) "1"
        ["name"] => string(3) "sea"
        ["num"] => int(13)
      }
      [1] => array(3) {
        ["id"] => string(1) "2"
        ["name"] => string(4) "seai"
        ["num"] => int(2)
      }
      [2] => array(3) {
        ["id"] => string(1) "3"
        ["name"] => string(6) "seaiio"
        ["num"] => int(0)
      }
    }