通过php和redis实现一个小功能排行榜，用的数据类型是有序集合：zrevrange 递增排序，zrange 递减排序

/**
     * 排行榜     */public function rank()
    {// $this->zrem($this->cachekey);$this->redis->del($this->cachekey);$dataOne = [];for ($i=0; $i < 5; $i++) { 
          // 生成随机数$num = rand(0,100);// 生成随机字符串$str = $this->get_random(6,'abcdefghijklmnopqrstuvwxyzABCDEFJHIJKLMNOPQRSTUVWXYZ');            $this->redis->zadd($this->cachekey,$num,json_encode(['name'=>$str]));// 由大到小排序$dataOne = $this->redis->ZREVRANGE($this->cachekey, 0, -1, true);// 由小到大排序$dataTow = $this->redis->ZRANGE($this->cachekey, 0, -1, true);
        }echo "<pre>";print_r($dataOne);print_r($dataTow);

    }// 生成随机字符串public function get_random($len,$chars)
    {$hash = "";$max = strlen($chars) - 1;for ($i=0; $i < $len; $i++) { $hash .= $chars[mt_rand(0,$max)];
        }return $hash;
    }

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