# pipe ## 说明: ```php void Connection::pipe(TcpConnection $target_connection) ``` ## 参数 将当前连接的数据流导入到目标连接。内置了流量控制。此方法做TCP代理非常有用 ## 范例 TCP代理 ```php <?php use Workerman\Worker; use Workerman\Connection\AsyncTcpConnection; require_once __DIR__ . '/Workerman/Autoloader.php'; $worker = new Worker('tcp://0.0.0.0:8483'); $worker->count = 12; // tcp连接建立后 $worker->onConnect = function($connection) { // 建立本地80端口的异步连接 $connection_to_80 = new AsyncTcpConnection('tcp://127.0.0.1:80'); // 设置将当前客户端连接的数据导向80端口的连接 $connection->pipe($connection_to_80); // 设置80端口连接返回的数据导向客户端连接 $connection_to_80->pipe($connection); // 执行异步连接 $connection_to_80->connect(); }; // 运行worker Worker::runAll(); ```