PHP sends text messages in batches using different platforms

$redis = new \redis();
        $conn = $redis->connect('localhost', 6379);
        $auth = $redis->auth('*****'); //redis设置了密码，需要认证
        $list = Testuser::find()->asarray()->all();
        for ($i=0; $i < count($list); $i++) { 
            $redis->lpush('list',$list[$i]['email']);
        }

        $redis = new \redis();
        $conn = $redis->connect('localhost', 6379);
        $auth = $redis->auth('*****');
        $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);
            if($sendmsg){
                //处理发送成功的逻辑
            }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，
        }