使用workerman/mqtt报错问题，请老师帮下忙，谢谢

问题描述

使用官方代码里的程序，仅仅修改了URL，我用mqttfx，并且配置好后是可以连接mqtt服务端，但是用PHP程序却一直报这个错，请老师帮忙看一下

程序代码

<?php
require __DIR__ . '/vendor/autoload.php';
use Workerman\Worker;
$worker = new Worker();
$worker->onWorkerStart = function(){
    $mqtt = new Workerman\Mqtt\Client('mqtt://localhost:1883');
    $mqtt->onConnect = function($mqtt) {
        $mqtt->subscribe('test');
    };
    $mqtt->onMessage = function($topic, $content){
        var_dump($topic, $content);
    };
    $mqtt->connect();
};
Worker::runAll();

报错信息

---------------------------------------------- WORKERMAN -----------------------------------------------
Workerman version:4.2.1          PHP version:8.0.2
----------------------------------------------- WORKERS ------------------------------------------------
worker                                          listen                              processes   status
none                                            none                                1           [ok]
PHP Fatal error:  Declaration of Workerman\Mqtt\Protocols\Mqtt::input(string $buffer, Workerman\Connection\ConnectionInterface $connection): int must be compatible with Workerman\Protocols\ProtocolInterface::input($recv_buffer, Workerman\Connection\ConnectionInterface $connection) in F:\mqtt\vendor\workerman\mqtt\src\Protocols\Mqtt.php on line 136

Fatal error: Declaration of Workerman\Mqtt\Protocols\Mqtt::input(string $buffer, Workerman\Connection\ConnectionInterface $connection): int must be compatible with Workerman\Protocols\ProtocolInterface::input($recv_buffer, Workerman\Connection\ConnectionInterface $connection) in F:\mqtt\vendor\workerman\mqtt\src\Protocols\Mqtt.php on line 136
Worker process terminated with ERROR: E_COMPILE_ERROR "Declaration of Workerman\Mqtt\Protocols\Mqtt::input(string $buffer, Workerman\Connection\ConnectionInterface $connection): int must be compatible with Workerman\Protocols\ProtocolInterface::input($recv_buffer, Workerman\Connection\ConnectionInterface $connection) in F:\mqtt\vendor\workerman\mqtt\src\Protocols\Mqtt.php on line 136"
这里粘贴报错

截图报错信息里报错文件相关代码

操作系统及workerman/webman等框架组件具体版本

workerman/mqtt 2.1
workerman/workerman 4.2.1 An asynchronous event driven PHP framework for easily building fast, scalable network ap...