How to use PHP to implement the task reward function of WeChat applet?

How to use PHP to implement the task reward function of WeChat applet?

As a new type of application development platform, WeChat applet has attracted more and more attention and use by developers. In the development of WeChat mini programs, task reward function is one of the most common requirements. After users complete specified tasks, developers increase user participation and activity by issuing rewards to users. This article will introduce how to use PHP language to implement the task reward function of WeChat applet and provide code examples.

Before we start to implement the task reward function, we need to understand some relevant knowledge. The backend development of WeChat mini programs generally uses PHP language and requires interaction with the WeChat public platform. In the WeChat applet, we can implement functions such as user authorization login and obtaining user information by calling the WeChat interface. In addition, the task reward function usually relies on a backend database to store the user's task completion status and reward information.

The following are the steps and code examples for using PHP to implement the task reward function of the WeChat applet:

1. Create a database table

First, we need to create a database table Create two tables: user and reward.

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `openid` varchar(50) NOT NULL,
  `nickname` varchar(50) NOT NULL,
  `avatar` varchar(100) NOT NULL,
  `points` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `reward` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `openid` varchar(50) NOT NULL,
  `task_name` varchar(100) NOT NULL,
  `points` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. Get user information

After the user logs in to the mini program, we obtain the user's openid, nickname, avatar and other information by calling the WeChat interface.

// 获取用户openid
$code = $_GET['code'];
$appid = 'your_appid';
$secret = 'your_secret';
$url = "https://api.weixin.qq.com/sns/jscode2session?appid=$appid&secret=$secret&js_code=$code&grant_type=authorization_code";
$res = json_decode(file_get_contents($url), true);
$openid = $res['openid'];

// 获取用户信息
$nickname = $_GET['nickname'];
$avatar = $_GET['avatar'];

// 保存用户信息到数据库
$conn = mysqli_connect('localhost', 'your_username', 'your_password', 'your_database');
$sql = "INSERT INTO user (openid, nickname, avatar) VALUES ('$openid', '$nickname', '$avatar')";
mysqli_query($conn, $sql);

3. Create tasks

Developers can create tasks in the mini program background, including task names and reward points.

$task_name = $_GET['task_name'];
$points = $_GET['points'];

$conn = mysqli_connect('localhost', 'your_username', 'your_password', 'your_database');
$sql = "INSERT INTO reward (openid, task_name, points) VALUES ('$openid', '$task_name', $points)";
mysqli_query($conn, $sql);

4. Complete the task and get rewards

When the user completes the task in the mini program, we need to update the user's points and delete the corresponding task record.

$reward_id = $_GET['reward_id'];

$conn = mysqli_connect('localhost', 'your_username', 'your_password', 'your_database');
$sql = "SELECT points FROM reward WHERE id = $reward_id";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$points = $row['points'];

// 更新用户积分
$sql = "UPDATE user SET points = points + $points WHERE openid = '$openid'";
mysqli_query($conn, $sql);

// 删除任务记录
$sql = "DELETE FROM reward WHERE id = $reward_id";
mysqli_query($conn, $sql);

5. Query user points

Users can check their points through the mini program.

$conn = mysqli_connect('localhost', 'your_username', 'your_password', 'your_database');
$sql = "SELECT points FROM user WHERE openid = '$openid'";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$points = $row['points'];

Through the above steps, we can use PHP language to implement the task reward function of the WeChat applet. Developers can further optimize and improve the code according to actual needs. At the same time, in order to ensure data security, it is recommended to add necessary security verification and protection measures to the code.

Summary

This article introduces how to use PHP language to implement the task reward function of WeChat applet and provides code examples. By understanding the interface and database operations of WeChat mini programs, developers can easily implement task reward functions and increase user participation and activity. I hope this article can be helpful to everyone, and I wish everyone success in the development of WeChat mini programs!

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