How to add multi-user collaboration functionality to the accounting system - How to develop multi-user collaboration using PHP

How to add multi-user collaboration functionality to the accounting system - How to develop multi-user collaboration using PHP, specific code examples are required

From an accounting system for personal use to In enterprise-level financial management systems, multi-user collaboration has always been an important function to improve work efficiency and collaboration. In this article, we will discuss how to develop an accounting system using PHP and add multi-user collaboration capabilities. We will also provide concrete code examples.

Step One: Database Design

Before we start writing code, we first need to design the database structure. In this article we use MySQL as the database management system. The following is a simple database table design, including user table, account table and permission table.

User table (users table):

id (int) // 用户ID
username (varchar) // 用户名
password (varchar) // 密码

Accounts table (accounts table):

id (int) // 账目ID
user_id (int) // 用户ID（外键，关联users表）
title (varchar) // 账目标题
description (text) // 账目描述
amount (decimal) // 金额

Permissions table (permissions table):

id (int) // 权限ID
user_id (int) // 用户ID（外键，关联users表）
account_id (int) // 账目ID（外键，关联accounts表）

In the database After creating the above table, we can start writing PHP code.

Step Two: User Registration and Login Function

First, we need to write the code for the user registration and login function. When a user registers, he or she needs to provide a username and password, and insert the user information into the users table.

// 注册
if (isset($_POST['register'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];

    // 检查用户名是否已存在
    $checkUsernameQuery = "SELECT id FROM users WHERE username = '$username'";
    $checkUsernameResult = mysqli_query($con, $checkUsernameQuery);

    if (mysqli_num_rows($checkUsernameResult) > 0) {
        echo "用户名已存在";
    } else {
        // 插入新用户
        $insertUserQuery = "INSERT INTO users (username, password) VALUES ('$username', '$password')";
        mysqli_query($con, $insertUserQuery);

        echo "注册成功";
    }
}

// 登录
if (isset($_POST['login'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];

    // 检查用户名和密码是否匹配
    $checkUserQuery = "SELECT id FROM users WHERE username = '$username' AND password = '$password'";
    $checkUserResult = mysqli_query($con, $checkUserQuery);

    if (mysqli_num_rows($checkUserResult) > 0) {
        echo "登录成功";
    } else {
        echo "用户名或密码错误";
    }
}

Step Three: Permission Management Between Users

Next, we need to implement the permission management function between users. That is, a user can specify the operating permissions (such as viewing, editing, etc.) that other users have on their own accounts.

// 添加权限
if (isset($_POST['add_permission'])) {
    $account_id = $_POST['account_id'];
    $user_id = $_POST['user_id'];

    // 检查用户是否有权限修改该账目的权限
    // 这里需要根据实际情况进行权限判断，例如只有账目的创建者才能添加权限
    $checkPermissionQuery = "SELECT id FROM permissions WHERE account_id = '$account_id' AND user_id = '$currentUserId'";
    $checkPermissionResult = mysqli_query($con, $checkPermissionQuery);

    if (mysqli_num_rows($checkPermissionResult) > 0) {
        // 添加权限
        $insertPermissionQuery = "INSERT INTO permissions (user_id, account_id) VALUES ('$user_id', '$account_id')";
        mysqli_query($con, $insertPermissionQuery);

        echo "添加权限成功";
    } else {
        echo "您没有权限添加权限";
    }
}

// 删除权限
if (isset($_POST['delete_permission'])) {
    $permission_id = $_POST['permission_id'];

    // 检查用户是否有权限删除该权限
    // 这里需要根据实际情况进行权限判断，例如只有账目的创建者或权限的创建者才能删除权限
    $checkPermissionQuery = "SELECT id FROM permissions WHERE id = '$permission_id' AND (user_id = '$currentUserId' OR account_id = '$currentAccountId')";
    $checkPermissionResult = mysqli_query($con, $checkPermissionQuery);

    if (mysqli_num_rows($checkPermissionResult) > 0) {
        // 删除权限
        $deletePermissionQuery = "DELETE FROM permissions WHERE id = '$permission_id'";
        mysqli_query($con, $deletePermissionQuery);

        echo "删除权限成功";
    } else {
        echo "您没有权限删除该权限";
    }
}

Step 4: Implement the viewing and editing functions of accounts

Finally, we need to implement the viewing and editing functions of accounts. Users can view the accounts to which they have permission and modify the accounts.

// 显示账目列表
$getAccountsQuery = "SELECT a.id, a.title, a.description, a.amount FROM accounts a, permissions p WHERE p.user_id = '$currentUserId' AND p.account_id = a.id";
$getAccountsResult = mysqli_query($con, $getAccountsQuery);

while ($row = mysqli_fetch_assoc($getAccountsResult)) {
    echo "账目标题：" . $row['title'] . "<br>";
    echo "账目描述：" . $row['description'] . "<br>";
    echo "账目金额：" . $row['amount'] . "<br>";
    echo "<br>";
}

// 编辑账目
if (isset($_POST['edit_account'])) {
    $account_id = $_POST['account_id'];
    $title = $_POST['title'];
    $description = $_POST['description'];
    $amount = $_POST['amount'];

    // 检查用户是否有权限编辑该账目
    $checkPermissionQuery = "SELECT id FROM permissions WHERE account_id = '$account_id' AND user_id = '$currentUserId'";
    $checkPermissionResult = mysqli_query($con, $checkPermissionQuery);

    if (mysqli_num_rows($checkPermissionResult) > 0) {
        // 更新账目信息
        $updateAccountQuery = "UPDATE accounts SET title = '$title', description = '$description', amount = '$amount' WHERE id = '$account_id'";
        mysqli_query($con, $updateAccountQuery);

        echo "账目编辑成功";
    } else {
        echo "您没有权限编辑该账目";
    }
}

Through the above code example, we can implement a simple accounting system and add the function of multi-user collaboration. Users can register, log in, view accounts, edit accounts, and add and delete permissions to other users' accounts.

Although this is just a basic example, it can open the door for you to implement more complex and powerful accounting systems. Hope this article is helpful to you!

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