ThinkPHP6 WeChat Payment Interface Development Guide: Implementing Payment Function

ThinkPHP6 WeChat Payment Interface Development Guide: Implementing Payment Function

Introduction:
With the development of the Internet, WeChat payment has become indispensable in people’s lives One of the payment methods. In the process of developing web applications, integrating WeChat payment functions is an inevitable requirement. This guide will introduce how to use the ThinkPHP6 framework to develop the WeChat payment interface and implement payment functions.

Part One: Preparation

Before starting to write code, we need to make the following preparations:

1. Register the WeChat public account/mini program and obtain the appid and appsecret as well as merchant number and payment key;
2. Download and install the ThinkPHP6 framework and create a new project;
3. Install and configure WeChat payment SDK (such as EasyWechat);
4. Create a route and Controller for receiving WeChat payment callbacks.

Part 2: Configuring WeChat Payment SDK

1. In the composer.json file in the project root directory, add the dependency of easywechat:

{

"require": {
    "overtrue/wechat": "^4.0"
}

}

Then execute the command: composer install to install easywechat.

2. In the config directory under the project root directory, create the wechat.php configuration file and add the following content:

return [

'appid' => 'your_appid',
'appsecret' => 'your_appsecret',
'mch_id' => 'your_mch_id',
'key' => 'your_pay_key',
// 更多配置...

];

Replace your_appid, your_appsecret, your_mch_id and your_pay_key with your actual information.

Part 3: Writing the payment interface

1. Create the controller directory in the app directory, create the WechatPayController.php file in the controller directory, and add the following code:

namespace appcontroller;

use think acadeConfig;
use EasyWeChatFactory;

class WechatPayController
{

public function pay()
{
    // 从配置文件中获取微信支付的配置
    $wechatConfig = Config::get('wechat');

    // 创建微信支付对象
    $app = Factory::payment($wechatConfig);

    // 组装请求参数
    $params = [
        'body' => '订单描述', // 商品描述
        'out_trade_no' => '订单号', // 自定义的订单号
        'total_fee' => '订单金额（单位：分）', 
        'notify_url' => '回调地址',
        'trade_type' => '交易类型',
    ];

    // 发起支付请求
    $result = $app->order->unify($params);

    // 处理支付结果
    if ($result['return_code'] === 'SUCCESS' && $result['result_code'] === 'SUCCESS') {
        // 根据$result中的prepay_id生成签名等信息
        // 将生成的信息返回给前端进行支付
    } else {
        // 支付失败，处理错误信息
    }
}

public function notify()
{
    // 支付回调处理
    $wechatConfig = Config::get('wechat');
    $app = Factory::payment($wechatConfig);
    $response = $app->handlePaidNotify(function ($message, $fail) {
        // 根据$message中的参数进行验证和处理
        // 验证通过后，处理订单状态等业务逻辑
        return true; // 返回true表示处理成功
    });
    return $response;
}

}

2. Add the routing rules of the payment interface in the route:

Route::post('pay', 'WechatPayController/pay'); // Initiate payment
Route::any('notify', 'WechatPayController/notify'); // Payment callback

At this point, we have completed the development of the WeChat payment interface.

Conclusion:
This guide mainly introduces how to use the ThinkPHP6 framework to develop the WeChat payment interface and implement the payment function. First, the necessary environment and configuration are prepared, and then the payment function is implemented through EasyWechat. We hope this guide will be helpful to developers when integrating WeChat payment functions.

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