Aerys\Server::setTrace PHP Method

    private function setTrace(InternalRequest $ireq)
    {
        if (\is_string($ireq->trace)) {
            $ireq->locals['aerys.trace'] = $ireq->trace;
        } else {
            $trace = "{$ireq->method} {$ireq->uri} {$ireq->protocol}\r\n";
            foreach ($ireq->trace as list($header, $value)) {
                $trace .= "{$header}: {$value}\r\n";
            }
            $ireq->locals['aerys.trace'] = $trace;
        }
    }