workerman 作为WSS客户端报错

        $con = new AsyncTcpConnection('wss://ws.yuming.com:2888');

        // 设置以ssl加密方式访问，使之成为wss
        $con->transport = 'ssl';

        $con->onConnect = function(AsyncTcpConnection $con) {
            $con->send('hello');
        };

        $con->onMessage = function(AsyncTcpConnection $con, $data) {
            echo $data;
        };

        $con->connect();