Use php to develop Websocket to implement real-time product recommendation function

Websocket is a full-duplex communication protocol that can achieve real-time communication between the browser and the server. In e-commerce websites, Websocket can be used to implement real-time product recommendation functions to help users better find the products they need.

This article will introduce how to use PHP to develop Websocket to implement real-time product recommendation function, and provide specific code examples.

1. Requirements

Before starting development, we need to meet the following requirements:

1. PHP version: 5.3 or above
2. Operating system: Linux, Windows, Mac, etc.
3. Extension: swoole extension (https://www.swoole.com/) 4.3.0 or above

2. Install the swoole extension

First, we need to install the swoole extension. swoole provides basic classes and event-driven models for developing Websocket, which greatly simplifies the development of Websocket.

In a Linux environment, you can install the swoole extension through the following command:

pecl install swoole

In a Windows environment, you can install it from the swoole official website (https://windows.php.net/downloads/pecl/ releases/swoole/) Download the corresponding version of the swoole extension, extract it to the php extension directory, and add the following lines to the php.ini file:

extension=swoole.so

3. Develop Websocket

Next, we start developing Websocket. First, create a websocket.php file to handle Websocket connections.

<?php
// 创建Websocket服务器

$server = new swoole_websocket_server("0.0.0.0", 9501);

// 监听WebSocket连接打开事件

$server->on('open', function (swoole_websocket_server $server, $request) {
    echo "WebSocket连接建立成功！
";
});

// 监听WebSocket消息事件

$server->on('message', function (swoole_websocket_server $server, $frame) {
    echo "WebSocket收到消息：{$frame->data}
";

    // 处理推荐商品逻辑
    // ...

    // 返回推荐商品列表
    $server->push($frame->fd, json_encode([
        ['name' => '商品1', 'price' => 10],
        ['name' => '商品2', 'price' => 20],
        ['name' => '商品3', 'price' => 30],
    ]));
});

// 监听WebSocket连接关闭事件

$server->on('close', function ($server, $fd) {
    echo "WebSocket连接关闭！
";
});

// 启动Websocket服务器

$server->start();

The above code creates a Websocket server, monitors connection requests from the client, and triggers corresponding callback functions when events such as successful connection establishment, message reception, and connection closure occur.

In the message event received, we can write the logic of product recommendation and return the recommendation results to the client.

4. Client uses Websocket

In the client, we need to use JavaScript to create a Websocket connection and send a message to obtain recommended products.

// 创建Websocket连接
var ws = new WebSocket("ws://127.0.0.1:9501");

// 监听Websocket连接打开事件
ws.onopen = function() {
    console.log("Websocket连接建立成功！");

    // 发送消息
    ws.send("Hello, Server!");
};

// 监听Websocket消息事件
ws.onmessage = function(event) {
    var data = JSON.parse(event.data);
    console.log("推荐商品列表：", data);
};

// 监听Websocket连接关闭事件
ws.onclose = function() {
    console.log("Websocket连接关闭！");
};

In the above code, we create a WebSocket connection, listen for connection opening, message and connection closing events, and send messages after the connection is successfully established to obtain recommended products.

5. Summary

This article introduces how to use PHP to develop Websocket to realize the real-time product recommendation function, and provides specific code implementation.

Through Websocket, we can achieve real-time communication and data exchange to provide better services for users of e-commerce websites. At the same time, Websocket can also be used in other fields, such as online games, video conferencing, etc.

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