What are some common techniques or technologies used for real-time updates in chat systems, and how can PHP be integrated with them?

Real-time updates in chat systems can be achieved using techniques such as long polling, WebSockets, or Server-Sent Events. PHP can be integrated with these technologies by using libraries or frameworks that support real-time communication, such as Ratchet for WebSockets or ReactPHP for asynchronous processing. 

// Example using Ratchet for WebSockets

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

require 'vendor/autoload.php';

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8080
);

$server->run();

Keywords

Websockets Long polling Server-sent events PHP socket functions Pusher API

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