PHP development of enterprise resource planning (ERP) systems that build user rights management functions

PHP development to build an enterprise resource planning (ERP) system with user rights management function

As enterprises grow and develop, managing enterprise resources becomes more and more complex. In order to improve efficiency and protect data security, many companies choose to introduce enterprise resource planning (ERP) systems. In large-scale ERP systems, user rights management functions are very important. Through reasonable user rights management, you can ensure that each user can only access the functions and data they need, effectively protecting the core information and intellectual property rights of the enterprise.

This article will demonstrate how to build and implement user rights management functions by developing a simple ERP system using PHP.

First, we need a database to store user information and permissions. Create a database named "erp" in the MySQL database and create three tables: users, roles, and permissions.

CREATE DATABASE erp;

-- 创建用户表
CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50),
    email VARCHAR(100),
    password VARCHAR(100),
    role_id INT
);

-- 创建角色表
CREATE TABLE roles (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50)
);

-- 创建权限表
CREATE TABLE permissions (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50)
);

Next, we need to associate users, roles and permissions. In the roles table, add a field "permissions" to save the permissions corresponding to the role. In the permissions table, add a field "roles" to save the roles that have this permission.

-- 在角色表中添加权限字段
ALTER TABLE roles ADD permissions VARCHAR(255);

-- 在权限表中添加角色字段
ALTER TABLE permissions ADD roles VARCHAR(255);

Now you can add some initial data to the roles and permissions tables.

-- 添加初始角色
INSERT INTO roles (name) VALUES ('管理员');
INSERT INTO roles (name) VALUES ('普通用户');

-- 添加初始权限
INSERT INTO permissions (name) VALUES ('查看订单');
INSERT INTO permissions (name) VALUES ('创建订单');
INSERT INTO permissions (name) VALUES ('编辑订单');

-- 更新角色权限字段
UPDATE roles SET permissions = '1,2,3' WHERE id = 1;
UPDATE roles SET permissions = '1' WHERE id = 2;

-- 更新权限角色字段
UPDATE permissions SET roles = '1' WHERE id IN (1, 2, 3)

Now, we can start writing PHP code to implement user rights management functions.

First, create a configuration file named "config.php" for connecting to the database.

<?php
$host = 'localhost';
$dbname = 'erp';
$username = 'root';
$password = '';

try {
    $db = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);
} catch (PDOException $e) {
    die("连接失败: " . $e->getMessage());
}
?>

Next, create a file named "functions.php" to save some commonly used functions.

<?php
function hasPermission($permission) {
    global $db;
    $role_id = $_SESSION['role_id'];
    
    $query = $db->prepare("SELECT permissions FROM roles WHERE id = ?");
    $query->execute([$role_id]);
    $permissions = $query->fetch()['permissions'];
    
    return in_array($permission, explode(',', $permissions));
}

function redirect($url) {
    header("Location: $url");
    exit();
}
?>

Then, at the beginning of the PHP file, introduce the configuration file and function file.

<?php
session_start();
include 'config.php';
include 'functions.php';
?>

Now, we can use these functions to check user permissions.

<?php
if (!hasPermission('创建订单')) {
    echo "您没有权限创建订单！";
    exit();
}

// 允许创建订单的代码...
?>

Through the above code examples, we can see how to use PHP to develop a simple ERP system and implement user rights management functions. In actual development, we can expand and improve these functions according to specific needs, such as adding role management interfaces, permission allocation interfaces, etc.

To sum up, the PHP development of an enterprise resource planning (ERP) system that builds user rights management functions is an important task. Reasonable user rights management can ensure the security of an enterprise's core information and intellectual property and improve the efficiency of enterprise resource utilization. By properly organizing the database and writing corresponding code, we can achieve reliable user rights management functions, thereby providing strong support for the development and growth of the enterprise.

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