What is the purpose of websocket in PHP?

In PHP, the function of WebSocket is to facilitate real-time communication. Unlike traditional HTTP protocol which operates on a request-response model where the client sends a request, the server responds, and then the connection closes, WebSocket protocol allows for the establishment of a persistent connection. This enables the server to actively send data to the client and achieve two-way communication.

WebSockets are commonly used in scenarios such as real-time chat, live data updates, collaborative editing, and real-time game communication. Using WebSockets can reduce communication delays between servers and clients, providing a better user experience. In PHP, WebSocket functionality can be implemented using libraries or frameworks like Ratchet or Swoole.