$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
$client->on("connect", function(swoole_client $cli) {
 $cli->send("GET / HTTP/1.1\r\n\r\n");
});
$client->on("receive", function(swoole_client $cli, $data){
 echo "Receive: $data";
 $cli->send(str_repeat('A', 100)."\n");
 sleep(1);
});
$client->on("error", function(swoole_client $cli){
 echo "error\n";
});
$client->on("close", function(swoole_client $cli){
 echo "Connection close\n";
});
//底层会自动进行异步域名解析
$client->connect('www.baidu.com', 9501);

function test()
{
 test_sleep();
}
function test_sleep()
{
 echo "sleep 5\n";
 sleep(5);
}
$server = new swoole_server('127.0.0.1', 9501);
$server->set([
 'worker_num' => 1,
 'task_worker_num' => 1,
 'trace_event_worker' => true,
 'request_slowlog_timeout' => 1,
 'request_slowlog_file' => '/tmp/trace.log',
]);
$server->on('Receive', function($serv, $fd, $reactor_id, $data) {
 test();
 $serv->send($fd, "Swoole: $data");
});
$server->start();

[08-Jan-2018 15:21:57] [worker#0] pid 26905
[0x00007f60cda22340] sleep() /home/htf/workspace/swoole/examples/server/trace.php:10
[0x00007f60cda222e0] test_sleep() /home/htf/workspace/swoole/examples/server/trace.php:4
[0x00007f60cda22280] test() /home/htf/workspace/swoole/examples/server/trace.php:28
[0x00007f60cda22190] {closure}() /home/htf/workspace/swoole/examples/server/trace.php:42
[0x00007f60cda22140] start() /home/htf/workspace/swoole/examples/server/trace.php:42

$serv = new swoole_server("127.0.0.1", 9501);
$serv->set(array(
 'dispatch_mode' => 7,
 'worker_num' => 2,
));
$serv->on('receive', function (swoole_server $serv, $fd, $threadId, $data)
{
 var_dump($data);
 echo "#{$serv->worker_id} received length=" . strlen($data) . "\n";
});
$serv->start();

Swoole\Timer::tick(2000, function ($id) {
 var_dump($id);
});
Swoole\Event::cycle(function () {
 echo "hello [1]\n";
 Swoole\Event::cycle(function () {
 echo "hello [2]\n";
 Swoole\Event::cycle(null);
 });
});