php如何搭建长连接

<code class="php">use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use MyApp\MyApp;

$loop = React\EventLoop\Factory::create();
$webSock = new WsServer(new MyApp());
$httpServer = new HttpServer($webSock);
$server = new IoServer($httpServer, 8080, $loop);
$server->run();</code>

<code class="php">use React\EventLoop\Factory;
use React\Socket\Connector;
use Ratchet\Client\WebSocket;
use MyApp\MyApp;

$loop = Factory::create();
$connector = new Connector($loop);

$connector->connect('ws://localhost:8080')->then(function (WebSocket $conn) {
    $conn->on('message', function ($msg) use ($conn) {
        echo "Received: {$msg}\n";
    });

    $conn->send('Hello, server!');
}, function (Exception $e) {
    echo "Could not connect: {$e->getMessage()}\n";
});

$loop->run();</code>

<code class="php">// 在服务器端
$webSock->on('message', function ($conn, $msg) use ($webSock) {
    $webSock->connections->broadcast($msg);
});</code>

<code class="php">// 在客户端
$conn->on('message', function ($msg) {
    echo "Received: {$msg}\n";
});

$conn->send('Hello, server!');</code>