With the development of Internet technology, WebSocket has become a very commonly used communication protocol. Using WebSocket communication on the Web side, you can achieve real-time interaction, push messages and other functions to achieve a better user experience. It is also very convenient to use WebSocket communication in the ThinkPHP6 framework. This article will introduce in detail how to use WebSocket communication in ThinkPHP6.

1. Introduction to WebSocket

WebSocket is a full-duplex, two-way communication protocol implemented based on the TCP protocol. Through the WebSocket protocol, a persistent connection can be established between the Web side and the server side for real-time communication.

Compared with the HTTP protocol, the WebSocket protocol allows the client and server to send and receive data in real time while in the connected state. There is no need to re-establish a connection on the server side every time a request is sent like the HTTP protocol. This feature makes the WebSocket protocol very suitable for real-time communication scenarios.

2. Using WebSocket communication in ThinkPHP6

It is very convenient to use WebSocket communication in ThinkPHP6. You only need to use the Swoole extension to achieve WebSocket communication. Below we will introduce in detail how to use WebSocket communication in the ThinkPHP6 project.

1. Install the Swoole extension

You need to install the Swoole extension first. Run the following command in the command line:

pecl install swoole

2. Create WebSocket Controller

You can create a controller named WebSocket using the following command:

php think make:controller WebSocket

After creating the WebSocket controller, you can define the following methods in the controller:

use SwooleWebsocketFrame;
use SwooleWebsocketServer;

class WebSocket
{
    public function onOpen(Server $server, Frame $frame)
    {
        echo "connected".PHP_EOL;
        $server->push($frame->fd, "Welcome to use WebSocket".PHP_EOL);
    }

    public function onClose(Server $server, $fd)
    {
        echo "closed".PHP_EOL;
    }

    public function onMessage(Server $server, Frame $frame)
    {
        echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}".PHP_EOL;
        $server->push($frame->fd, "receive success".PHP_EOL);
    }
}

Three methods are defined here, corresponding to events such as connection establishment, closing, and message reception. In the onOpen method, we can use the push method to push messages to the client; in the onClose method, we can handle some logic when closing the connection; in the onMessage method, we can handle the logic after receiving the message.

3. Start the WebSocket service

After creating the WebSocket controller, you also need to start the WebSocket service on the command line.

php think swoole start

After starting the WebSocket service, you can use the WebSocket API in the browser to test the connection.

The code is as follows:

let websocket = new WebSocket("ws://127.0.0.1:9501");

websocket.onopen = function(event) {
    console.log("connected");
};

websocket.onmessage = function(event) {
    console.log(event.data);
};

websocket.onclose = function(event) {
    console.log("closed");
};

The event processing of connection establishment, message reception and connection closing is implemented here. When the connection is established, "connected" will be printed; when a message is received, the message will be printed to the console; when the connection is closed, "closed" will be printed.

At this point, using WebSocket communication in ThinkPHP6 is completed. Through the above steps, you can quickly build lightweight, high-performance WebSocket applications.

3. Summary

This article introduces the method of using WebSocket communication in ThinkPHP6. Through Swoole extension, we can quickly build high-performance WebSocket applications. Hope this article is helpful to everyone.

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