Teach you to use EasyWeChat and PHP to build the instant messaging function of WeChat applet

Teach you to use EasyWeChat and PHP to build the instant messaging function of WeChat mini programs

With the popularity of WeChat mini programs, more and more developers are beginning to pay attention and try to build their own mini programs. Among them, the instant messaging function is a common and important part of mini programs. This article will introduce how to use EasyWeChat and PHP to build the instant messaging function of WeChat applet, and attach code examples.

1. Install and configure EasyWeChat

First, we need to install and configure EasyWeChat. EasyWeChat is a PHP SDK developed based on the WeChat public platform, which can easily operate WeChat mini programs.

Use Composer to install EasyWeChat in the terminal:

composer require overtrue/wechat

Then, create a configuration file config.php in your project to store EasyWeChat configuration information. Configuration information includes the app_id, app_secret, token, etc. of the mini program. For example:

// config.php

return [
    'app_id' => 'your_app_id',
    'secret' => 'your_app_secret',
    'token' => 'your_token',
    // 更多配置项...
];

2. Create a WeChat mini program

Create a new mini program on the WeChat public platform and obtain the app_id and app_secret of the mini program. Fill in this information into the config.php file.

3. Create a PHP file for receiving and processing messages

Next, we need to create a PHP file for receiving and processing messages. In this file, we will use the message processing class provided by EasyWeChat to process the messages sent by the WeChat applet.

// message.php

require 'vendor/autoload.php';

use EasyWeChatFactory;
use EasyWeChatKernelMessagesMessage;

$config = require 'config.php';
$app = Factory::miniProgram($config);

$app->server->push(function($message){
    // 处理接收到的消息
    if ($message instanceof Message) {
        // 接收到的是文本消息
        if($message->MsgType == 'text') {
            // 在这里进行相应的业务处理
            $content = $message->Content;
            return '收到了你的消息：'.$content;
        }
    }
});

$response = $app->server->serve();
$response->send();

4. Configuring the message server

On the WeChat public platform, we need to configure the message server and point the URL for receiving messages to the PHP file created in the previous step. At the same time, the corresponding domain name and SSL certificate need to be configured on the server.

In a local development environment, you can use tools such as ngrok or localtunnel to expose the local server to the external network and provide HTTPS support.

5. Calling the interface in the mini program

In the front-end code of the mini program, we need to call the API provided by the WeChat mini program to send messages to our PHP file.

// index.js

// 发送消息
wx.request({
  url: 'https://your_domain/message.php',
  data: {
    message: 'Hello World'
  },
  method: 'POST',
  success: function(res) {
    console.log(res.data)
  }
})

6. Run and test

Finally, we need to run and test our code.

First, start your PHP server and ensure that the PHP file can run normally.

Then, call the interface in the WeChat applet to send the message. You can view the returned message in the mini program's console.

The above are the general steps for using EasyWeChat and PHP to build the instant messaging function of the WeChat applet. Through the interfaces and tools provided by EasyWeChat, we can easily build the instant messaging function of the mini program to receive and process messages. Hope this article can be helpful to you.

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