Defer 机制

<?php
$server = new Swoole\Http\Server("127.0.0.1", 9502, SWOOLE_BASE);

$server->set([
	'worker_num' => 1,
]);

$server->on('Request', function ($request, $response) {

	$tcpclient = new Swoole\Coroutine\Client(SWOOLE_SOCK_TCP);
	$tcpclient->connect('127.0.0.1', 9501，0.5)
	$tcpclient->send("hello world\n");

	$redis = new Swoole\Coroutine\Redis();
	$redis->connect('127.0.0.1', 6379);
	$redis->setDefer();
	$redis->get('key');

	$mysql = new Swoole\Coroutine\MySQL();
	$mysql->connect([
		'host' => '127.0.0.1',
		'user' => 'user',
		'password' => 'pass',
		'database' => 'test',
	]);
	$mysql->setDefer();
	$mysql->query('select sleep(1)');

	$httpclient = new Swoole\Coroutine\Http\Client('0.0.0.0', 9599);
	$httpclient->setHeaders(['Host' => "api.mp.qq.com"]);
	$httpclient->set([ 'timeout' => 1]);
	$httpclient->setDefer();
	$httpclient->get('/');

	$tcp_res  = $tcpclient->recv();
	$redis_res = $redis->recv();
	$mysql_res = $mysql->recv();
	$http_res  = $httpclient->recv();

	$response->end('Test End');
});
$server->start();