How to use PHP to implement the accounting function of WeChat applet?

How to use PHP to implement the accounting function of WeChat applet?

WeChat mini programs have been widely used in recent years, among which the accounting function is one of the functions commonly used by many users. This article will introduce how to use PHP to implement the accounting function of WeChat applet and provide specific code examples.

1. Preparation
To use PHP to implement the accounting function of WeChat Mini Program, we first need to prepare the following steps:
1. Make sure you have registered a WeChat Mini Program developer account, And the applet has been created.
2. Set up a PHP development environment, you can use WAMP, XAMPP and other software.
3. Familiar with the basic syntax of PHP and the use of MySQL.

2. Create database and tables
First, we need to create a database to store accounting information. You can use phpMyAdmin or other database management tools to create a database named "account_book" and create a table named "records" in it. The structure of the table is as follows:

CREATE TABLE records (
id int(11) NOT NULL AUTO_INCREMENT,
title varchar(255) NOT NULL,
amount decimal( 10,2) NOT NULL,
date date NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

3. Configure the applet code
In the developer tools of the WeChat applet, open the pages/index/index.js file and add the following code in the "onLoad" function of "Page":

Page({
onLoad: function() {

wx.request({
  url: 'http://your_domain.com/api/get_records.php',
  success: function(res) {
    console.log(res.data);
    // 在这里处理返回的记账记录数据
  }
})

}
})

This code will send a GET request to the back-end API interface to obtain the record Account recorded data.

4. Writing the back-end API interface
In the database created previously, we also need to write a back-end API interface to handle front-end requests. Create a new folder named "api" and create a file named "get_records.php" in it. In this file, add the following code:

header('Content-Type: application/json');

// Configure database connection
$ servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "account_book";

// Connect to the database
$ conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {

die("连接失败: " . $conn->connect_error);

}

// Query records
$sql = "SELECT id, title, amount, date FROM records";
$result = $conn->query($sql);

// Process query results
if ($result->num_rows > 0) {

$records = array();
while($row = $result->fetch_assoc()) {
    $record = array(
        'id' => $row['id'],
        'title' => $row['title'],
        'amount' => $row['amount'],
        'date' => $row['date']
    );
    array_push($records, $record);
}
echo json_encode($records);

} else {

echo "0 results";

}
$conn->close();
?>

This code will obtain accounting record data from the database through MySQL query statements, and return the data to the front end in JSON format.

5. Display accounting records
In the index.wxml file of the mini program, add the following code to display the accounting record data obtained from the backend:

{{ item.title }}
{{ item. amount }}
{{ item.date }}

In the index.js file of the mini program , add the following code to process the data returned by the API interface:

Page({
onLoad: function() {

var self = this;
wx.request({
  url: 'http://your_domain.com/api/get_records.php',
  success: function(res) {
    console.log(res.data);
    self.setData({
      records: res.data
    })
  }
})

}
})

Run The applet will display the accounting record data obtained from the backend on the page.

Summary:
Through the above steps, we can use PHP to implement the accounting function of the WeChat applet. First create a database table to store accounting records, then send a request to the back-end API interface on the mini program to obtain the accounting record data in the database, and finally display it on the mini program page. Through this example, we can further learn and master the development of PHP and WeChat applets.

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