子协程+通道

$serv = new \swoole_http_server("127.0.0.1", 9503, SWOOLE_BASE);

$serv->on('request', function ($req, $resp) {
	$chan = new chan(2);
	go(function () use ($chan) {
		$cli = new Swoole\Coroutine\Http\Client('www.qq.com', 80);
			$cli->set(['timeout' => 10]);
			$cli->setHeaders([
			'Host' => "www.qq.com",
			"User-Agent" => 'Chrome/49.0.2587.3',
			'Accept' => 'text/html,application/xhtml+xml,application/xml',
			'Accept-Encoding' => 'gzip',
		]);
		$ret = $cli->get('/');
		$chan->push(['www.qq.com' => $cli->body]);
	});

	go(function () use ($chan) {
		$cli = new Swoole\Coroutine\Http\Client('www.163.com', 80);
		$cli->set(['timeout' => 10]);
		$cli->setHeaders([
			'Host' => "www.163.com",
			"User-Agent" => 'Chrome/49.0.2587.3',
			'Accept' => 'text/html,application/xhtml+xml,application/xml',
			'Accept-Encoding' => 'gzip',
		]);
		$ret = $cli->get('/');
		$chan->push(['www.163.com' => $cli->body]);
	});
	
	$result = [];
	for ($i = 0; $i < 2; $i++)
	{
		$result += $chan->pop();
	}
	$resp->end(json_encode($result));
});
$serv->start();