Web Sockets offer a persistent, full duplex connection between a browser and a server, enabling real-time communication. While widely supported in modern browsers, you may wonder about PHP's native support for this technology.
PHP does not natively provide direct support for Web Sockets. Instead, you must rely on third-party libraries to implement this functionality.
PHP typically runs within Apache, Nginx, or IIS web servers. These servers are not inherently suitable for handling persistent connections like Web Sockets. Therefore, most PHP WebSocket libraries run as standalone processes to overcome this limitation.
Several libraries provide WebSocket support for PHP:
The mentioned libraries offer various examples and tutorials for implementing Web Sockets in PHP. For instance, Ratchet provides a Hello World example:
<code class="php">$server = Ratchet\Server\IoServerFactory::create( new WebSocketServer, 8080 ); $server->run();</code>
Note that IE10 supports Web Sockets, enabling widespread browser compatibility. Additionally, exploring Ajax push systems may provide alternative solutions for real-time data updates.
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