PHP redis 群发短信

$redis = new Redis();

        $redis->connect('127.0.0.1', 6379);
        $list = M('Sms')->field('phone')->where(array('s'=>0))->select();
;
        for ($i=0; $i < count($list); $i++) {
            $redis->lpush('list',$list[$i]['phone']);
        }

        $lenth = $redis->llen('list');

        for ($i=0; $i < $lenth ; $i++) {
            $phone = $redis->brpop('list',1,60);//从结尾处弹出一个值,超时时间为60s
            $phonenumber = $phone[1];
            //$sendmsg = send($phonenumber);
            $sendmsg = true;
            if($sendmsg){
                //处理发送成功的逻辑
                M('Sms')->where(array('phone' => $phonenumber))->data(array('s' => 1))->save();
                $this->writePostLogb($phonenumber);
            }else{
                //处理发送失败的逻辑
            }
            usleep(500000);//微秒，调用第三方接口，需要注意频率，
        }