What are the potential compatibility issues with using PHP Websockets in different browsers?

Potential compatibility issues with using PHP Websockets in different browsers include differences in WebSocket protocol implementations, browser support for WebSockets, and security restrictions imposed by browsers. To ensure compatibility, it is important to use a WebSocket library that handles these differences and fallback mechanisms for browsers that do not support WebSockets.

// Example code using Ratchet library for PHP Websockets with fallback for browsers without WebSocket support

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

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

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

$server->run();