print-api/app/wss/PrintWss.php

<?php

namespace app\wss;
use Workerman\Connection\TcpConnection;

class PrintWss
{
    public function onConnect(TcpConnection $connection)
    {
        echo "onConnect-111\n";
    }

    public function onWebSocketConnect(TcpConnection $connection, $http_buffer)
    {
        echo "onWebSocketConnect\n";
    }

    public function onMessage(TcpConnection $connection, $data)
    {
        $connection->send($data);
    }

    public function onClose(TcpConnection $connection)
    {
        echo "onClose-2222\n";
    }

}