PHP and EasyWeChat: How to implement online consultation function through WeChat applet

PHP and EasyWeChat: How to implement online consultation functions through WeChat mini-programs

Introduction:
With the popularity of WeChat mini-programs, more and more companies are beginning to use them to provide online consulting services . This article will introduce how to use PHP and EasyWeChat to implement the online consultation function, and provide code samples for readers' reference.

1. Install EasyWeChat
First, we need to install EasyWeChat. Open the command line tool, enter the directory where the project is located, and execute the following command:

composer require overtrue/wechat

This will automatically download and install EasyWeChat into your project.

2. Configure WeChat Mini Program
Before using EasyWeChat, you need to configure your WeChat Mini Program.
Open the EasyWeChat configuration file wechat.php, find the two fields app_id and secret, and fill in the App ID and App Secret of your mini program.

3. Initialize EasyWeChat
Before starting to use EasyWeChat, we need to initialize it. Add the following code to the code:

use EasyWeChatFactory;

$options = [
    'app_id' => 'your-app-id',
    'secret' => 'your-app-secret',
    'response_type' => 'array',
];

$app = Factory::miniProgram($options);

Replace your-app-id and your-app-secret with the App ID and App of your WeChat applet Secret.

4. Obtain user information
In order to implement the online consultation function, we need to obtain user information. In the WeChat applet, you can use wx.login to get the user's code, and then use wx.getUserInfo to get the user's basic information.

In PHP, we can use the API provided by EasyWeChat to obtain user information. In your interface, add the following code:

$code = $_POST['code'];
$encryptedData = $_POST['encryptedData'];
$iv = $_POST['iv'];

$session = $app->auth->session($code);
$decryptedData = $app->encryptor->decryptData($session['session_key'], $iv, $encryptedData);

$openId = $decryptedData['openId'];
$nickName = $decryptedData['nickName'];
$avatarUrl = $decryptedData['avatarUrl'];

5. Save user information
After obtaining the user information, we need to save it. This way we can use the information in subsequent consultations. You can choose to save user information in a database, or store it in a cache such as Redis.

6. Implement the online consultation function
With the user’s information, we can implement the online consultation function. A common implementation is to use WebSocket technology. In this example, we have used the Swoole extension to implement a WebSocket server.

First, we need to install Swoole. Open the command line tool, enter the directory where the project is located, and execute the following command:

pecl install swoole

After the installation is completed, add the following code to your code:

$server = new SwooleWebSocketServer("0.0.0.0", 9502);

$server->on('open', function (SwooleWebSocketServer $server, $request) {
    echo "connection opened: {$request->fd}
";
});

$server->on('message', function (SwooleWebSocketServer $server, $frame) {
    $data = json_decode($frame->data, true);
    // 在这里处理消息逻辑
});

$server->on('close', function (SwooleWebSocketServer $server, $fd) {
    echo "connection closed: {$fd}
";
});

$server->start();

7. Save the chat records to the database
If you need to save the chat records for subsequent tracking and analysis, we can save the chat records to the database. The following is a sample code to save chat records to a MySQL database:

use IlluminateDatabaseCapsuleManager as Capsule;

$capsule = new Capsule;

$capsule->addConnection([
    'driver' => 'mysql',
    'host' => 'your-host',
    'database' => 'your-database',
    'username' => 'your-username',
    'password' => 'your-password',
    'charset' => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix' => '',
]);

$capsule->setAsGlobal();
$capsule->bootEloquent();

class Message extends Model {}

$message = new Message;
$message->user_id = $userId; // 用户的ID
$message->content = $content; // 聊天内容
$message->save();

will your-host, your-database, your-username, Replace your-password with the corresponding information for your MySQL database.

Conclusion:
This article introduces how to use PHP and EasyWeChat to implement online consultation functions, and provides some sample code. By using WeChat mini programs and EasyWeChat, we can easily implement online consultation functions and improve the company's service level and user experience. Hope this article is helpful to you.

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