PHP and EasyWeChat: How to implement coupon function through WeChat applet

PHP and EasyWeChat: How to implement the coupon function through WeChat mini-programs

With the rise of WeChat mini-programs, more and more companies are beginning to use them as a promotion and marketing tool. One of the important features is coupons. This article will teach you how to implement the coupon function through WeChat applet through the combination of PHP and EasyWeChat library.

1. Preparation

First, we need to install the EasyWeChat library. You can use Composer to install, the command is as follows:

composer require overtrue/wechat

2. Create coupon table structure

Create a table named coupons in the database to store coupons Related Information. The following is a simple table structure example:

CREATE TABLE `coupons` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `code` varchar(50) NOT NULL,
  `discount` decimal(10,2) NOT NULL,
  `expiry_date` date NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

3. Configure the mini program on the WeChat public platform

In the WeChat public platform, create a new mini program and obtain to AppID and AppSecret.

4. Create an EasyWeChat instance

In the PHP code, we can use the EasyWeChat library to interact with the WeChat applet. First, you need to instantiate an EasyWeChat object and pass in AppID and AppSecret. The code example is as follows:

use EasyWeChatFactory;

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

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

Please replace 'your-app-id' and 'your-app-secret' in the above code with your own AppID and AppSecret.

5. Get the user’s openID

In the WeChat applet, each user has a unique openID. We need to obtain the user's openID through the WeChat login function. The code example is as follows:

$session = $app->auth->session($code);
$openid = $session['openid'];

In the above code, $code is the temporary login credential obtained by the applet calling the wx.login interface.

6. Get the coupon list

Next, we can write code to get the user's coupon list from the database. Here, assume that we already have a function named getCouponsByOpenid() to obtain the coupon list:

$coupons = getCouponsByOpenid($openid);

The above code will obtain a list of all coupons belonging to the user.

7. Issuing Coupons

We also need to write code to issue coupons to users. Suppose we have a function named sendCoupon() for issuing coupons. The sample code is as follows:

$couponCode = 'your-coupon-code';
$coupon = sendCoupon($openid, $couponCode);

The above code will send the coupon named 'your-coupon-code' issued to specific users.

8. Display coupons in the mini program

Finally, we need to write the front-end code of the mini program to display the user's coupons. The following is a simple example:

wx.request({
  url: 'https://your-api.com/get-coupons', // 替换为你的接口地址
  data: {
    openid: 'your-openid'
  },
  success: function (res) {
    if (res.statusCode === 200) {
      const coupons = res.data;
      // 处理优惠券数据
    }
  }
});

The above code will request an interface named 'get-coupons' to obtain the user's coupon data, and process it after successful acquisition.

The above is an example of how to implement the coupon function of the WeChat applet through PHP and the EasyWeChat library. Through these code examples, we can better understand and master the method of using coupons in WeChat mini programs. Hope this article is helpful to you!

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