PHP is a popular scripting language that is commonly used for developing web applications. While PHP is primarily designed for request/response-based applications, it is possible to integrate WebSocket functionality into PHP applications using third-party libraries or frameworks.

WebSocket is a communication protocol that provides full-duplex communication channels over a single TCP connection. Unlike traditional HTTP requests, WebSocket allows for two-way communication between the client and the server, allowing real-time data transfer and push notifications.

To integrate WebSocket functionality into a PHP application, you can use libraries like Ratchet or PHP-Websockets. These libraries provide the necessary tools and abstractions to handle WebSocket connections and messages within a PHP application.

Here’s a simple example of a PHP WebSocket application using the Ratchet library:

1. Install Ratchet using Composer:

composer require cboden/ratchet

2. Create a `server.php` file:

clients = new \SplObjectStorage;

// Handle new connections
public function onOpen(ConnectionInterface $conn)
echo “New connection! ({$conn->resourceId})\n”;

// Handle incoming messages
public function onMessage(ConnectionInterface $from, $msg)
// Broadcast the received message to all connected clients
foreach ($this->clients as $client) {

// Handle closed connections
public function onClose(ConnectionInterface $conn)
echo “Connection {$conn->resourceId} has disconnected\n”;

public function onError(ConnectionInterface $conn, \Exception $e)
// Handle any errors
echo “An error has occurred: {$e->getMessage()}\n”;


// Create the WebSocket server
$server = IoServer::factory(
new HttpServer(
new WsServer(
new MyWebSocketServer()

echo “Server started: http://localhost:8080\n”;

// Run the server

3. Start the server by running `php server.php` in the terminal.

Now, you have a PHP WebSocket server running on `ws://localhost:8080`. You can use a WebSocket client library or browser-based WebSocket API to connect to the server and send/receive messages in real-time.

Keep in mind that PHP is not the most optimal language for building WebSocket servers due to its request/response nature. For more advanced and performance-focused WebSocket applications, other languages like Node.js or Go may be better suited.