workerman作为客户端怎么向另一个ws服务端发送emit指令
```php
use Workerman\Worker;
use Workerman\Connection\AsyncTcpConnectionworker = new Worker();
// 进程启动时
$worker->onWorkerStart = function()
{
    // 以websocket协议连接远程websocket服务器ws_connection->onMessage = function($connection, $data){
        echo "recv: $data\n";
    };
    // 连接上发生错误时,一般是连接远程websocket服务器失败错误
    $ws_connection->onError = function($connection, $code, $msg){
        echo){
        echo "connection closed\n";
    };
    // 设置好以上各种回调后,执行连接操作
    $ws_connection->connect();