workerman 启动后 没有监听指定的端口 脚本已阻塞

use Workerman\Worker;
require_once __DIR__ . '/Autoloader.php';

$worker = new Worker('http://127.0.0.1:8055');
$worker->onConnect = function($connection)
{
    echo "new connection from ip " . $connection->getRemoteIp() . "\n";
};
// 运行worker
Worker::runAll();