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) // 用戶ID
username (varchar) // 用戶名
password (varchar) // 密碼

Accounts table (accounts table):

id (int) // 賬目ID
user_id (int) // 用戶ID（外鍵，關(guān)聯(lián)users表）
title (varchar) // 賬目標題
description (text) // 賬目描述
amount (decimal) // 金額

Permissions table (permissions table):

id (int) // 權(quán)限ID
user_id (int) // 用戶ID（外鍵，關(guān)聯(lián)users表）
account_id (int) // 賬目ID（外鍵，關(guān)聯(lián)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.

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

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

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

        echo "注冊成功";
    }
}

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

    // 檢查用戶名和密碼是否匹配
    $checkUserQuery = "SELECT id FROM users WHERE username = '$username' AND password = '$password'";
    $checkUserResult = mysqli_query($con, $checkUserQuery);

    if (mysqli_num_rows($checkUserResult) > 0) {
        echo "登錄成功";
    } else {
        echo "用戶名或密碼錯誤";
    }
}

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.

// 添加權(quán)限
if (isset($_POST['add_permission'])) {
    $account_id = $_POST['account_id'];
    $user_id = $_POST['user_id'];

    // 檢查用戶是否有權(quán)限修改該賬目的權(quán)限
    // 這里需要根據(jù)實際情況進行權(quán)限判斷，例如只有賬目的創(chuàng)建者才能添加權(quán)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) {
        // 添加權(quán)限
        $insertPermissionQuery = "INSERT INTO permissions (user_id, account_id) VALUES ('$user_id', '$account_id')";
        mysqli_query($con, $insertPermissionQuery);

        echo "添加權(quán)限成功";
    } else {
        echo "您沒有權(quán)限添加權(quán)限";
    }
}

// 刪除權(quán)限
if (isset($_POST['delete_permission'])) {
    $permission_id = $_POST['permission_id'];

    // 檢查用戶是否有權(quán)限刪除該權(quán)限
    // 這里需要根據(jù)實際情況進行權(quán)限判斷，例如只有賬目的創(chuàng)建者或權(quán)限的創(chuàng)建者才能刪除權(quán)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) {
        // 刪除權(quán)限
        $deletePermissionQuery = "DELETE FROM permissions WHERE id = '$permission_id'";
        mysqli_query($con, $deletePermissionQuery);

        echo "刪除權(quán)限成功";
    } else {
        echo "您沒有權(quán)限刪除該權(quán)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.

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

while ($row = mysqli_fetch_assoc($getAccountsResult)) {
    echo "賬目標題：" . $row['title'] . "<br>";
    echo "賬目描述：" . $row['description'] . "<br>";
    echo "賬目金額：" . $row['amount'] . "<br>";
    echo "<br>";
}

// 編輯賬目
if (isset($_POST['edit_account'])) {
    $account_id = $_POST['account_id'];
    $title = $_POST['title'];
    $description = $_POST['description'];
    $amount = $_POST['amount'];

    // 檢查用戶是否有權(quán)限編輯該賬目
    $checkPermissionQuery = "SELECT id FROM permissions WHERE account_id = '$account_id' AND user_id = '$currentUserId'";
    $checkPermissionResult = mysqli_query($con, $checkPermissionQuery);

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

        echo "賬目編輯成功";
    } else {
        echo "您沒有權(quán)限編輯該賬目";
    }
}

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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