WebSocket ตอนที่ 3 : การสร้าง Server ทำหน้าที่ รับ-ส่ง ข้อมูล Real Time ด้วย PHP

<?php

namespace MyApp;

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class Connection implements MessageComponentInterface {

    protected $clients;

    public function __construct() {
        $this->clients = new \SplObjectStorage;
        echo "Congratulations! the server is now running\n";
    }

    public function onOpen(ConnectionInterface $conn) {
        // Store the new connection to send messages to later
        $this->clients->attach($conn);

        echo "New connection! ({$conn->resourceId})\n";
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        $numRecv = count($this->clients) - 1;
        echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "\n"
                , $from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');

        foreach ($this->clients as $client) {
            if ($from !== $client) {
                // The sender is not the receiver, send to each client connected
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        // The connection is closed, remove it, as we can no longer send it messages
        $this->clients->detach($conn);

        echo "Connection {$conn->resourceId} has disconnected\n";
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        echo "An error has occurred: {$e->getMessage()}\n";

        $conn->close();
    }

}
?>

<?php

use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use MyApp\Connection;

require dirname(__DIR__) . '/vendor/autoload.php';

$server = IoServer::factory(
                new HttpServer(
                new WsServer(
                new Connection()  ) ), 8089
);

$server->run();
?>