Open Swoole: Programmatic Server for PHP with Async IO, Coroutines and Fibers, Secure, Reliable, High performance

<?php
$server = new Swoole\HTTP\Server("127.0.0.1", 9501);

$server->on("start", function (Swoole\Http\Server $server) {
    echo "Swoole http server is started at http://127.0.0.1:9501\n";
});

$server->on("request", function (Swoole\Http\Request $request, Swoole\Http\Response $response) {
    $response->header("Content-Type", "text/plain");
    $response->end("Hello World\n");
});

$server->start();

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

$server->on('open', function($server, $req) {
    echo "connection open: {$req->fd}\n";
});

$server->on('message', function($server, $frame) {
    echo "received message: {$frame->data}\n";
    $server->push($frame->fd, json_encode(["hello", "world"]));
});

$server->on('close', function($server, $fd) {
    echo "connection close: {$fd}\n";
});

$server->start();

<?php
$server = new Swoole\Server("127.0.0.1", 9503);
$server->on('connect', function ($server, $fd){
    echo "connection open: {$fd}\n";
});
$server->on('receive', function ($server, $fd, $from_id, $data) {
    $server->send($fd, "Swoole: {$data}");
    $server->close($fd);
});
$server->on('close', function ($server, $fd) {
    echo "connection close: {$fd}\n";
});
$server->start();

<?php
$client = new Swoole\Client(SWOOLE_SOCK_TCP);
if (!$client->connect('127.0.0.1', 9501, 0.5)) {
    exit("connect failed. Error: {$client->errCode}\n");
}
$client->send("hello world\n");
echo $client->recv();
$client->close();

<?php
$redis = new Swoole\Coroutine\Redis();
$redis->connect('127.0.0.1', 6379);
$val = $redis->get('key');
echo $val;
$http = new Swoole\Coroutine\Http\Client('127.0.0.1', 80);
$http->get('/index.php');
echo $http->body;
$http->close();

<?php
$server = new Swoole\Http\Server("0.0.0.0", 9501, SWOOLE_BASE);
$server->set([
    'worker_num' => 1,
    'task_worker_num' => 2,
]);
$server->on('Request', function ($request, $response) use ($server) {
    $tasks[0] = ['time' => 0];
    $tasks[1] = ['data' => 'openswoole.com', 'code' => 200];
    $result = $server->taskCo($tasks, 1.5);
    $response->end('<pre>Task Result: '.var_export($result, true));
});
$server->on('Task', function (Swoole\Server $server, $task_id, $worker_id, $data) {
    if ($server->worker_id == 1) {
        sleep(1);
    }
    $data['done'] = time();
    $data['worker_id'] = $server->worker_id;
    return $data;
});
$server->start();