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PHP counts online users

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Release: 2016-11-09 14:28:51
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redis = new Redis(); } /** * 往集合中添加新的在线用户 * * @param $uid */ public function addUser($uid) { $this->redis->sAdd($this->prefix_key . date('hi'), $uid); } /** * 获取在线用户数 * * @param $start_min 统计开始分钟 hi格式 * @param $end_min 统计结束的分钟 * * @return mixed */ public function userNum($start_min, $end_min) { //第一个参数,并集的key名称 $params[] = $this->prefix_key . $start_min . '_' . $end_min; //遍历时间区间内所有的分钟,并放入到参数中 for ($min = $start_min; $min < $end_min; $min++) { $params[] = $this->prefix_key . $min; } //求所有分钟的用户的并集并保存,性能比直接计算返回快很多,省去了数据传输 $num = call_user_func_array([$this->redis, "sUnionStore"], $params); //删除临时并集 $this->redis->delete($params[0]); return $num; } }
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