How to use PHP developer city function: build permission management and administrator system

How to use PHP developer mall function: build permission management and administrator system

With the development of the Internet, online malls have become the choice of many companies and individual entrepreneurs. When developing a mall system, permission management and administrator system are one of the very important functions. This article will introduce how to use PHP to develop city functions and build permission management and administrator systems.

1. Database design

Before starting development, you first need to design the database structure. In the mall system, commonly used tables include user table, product table, order table, etc. On the premise of realizing permission management and administrator system, we also need to add administrator table and permission table.

Admin table design example:

CREATE TABLE admin (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(30) NOT NULL,
password varchar(50) NOT NULL,
email varchar(50) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Permission table design example:

CREATE TABLE permission (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(50) NOT NULL,
description varchar(100) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In order to implement permission management, permission IDs need to be added to the user table and role table foreign key.

User table design example:

CREATE TABLE user (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(30) NOT NULL,
password varchar(50) NOT NULL,
email varchar(50) NOT NULL,
permission_id int(11) DEFAULT NULL,
PRIMARY KEY (id),
KEY permission_id (permission_id),
CONSTRAINT user_permission_fk FOREIGN KEY (permission_id) REFERENCES permission (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Role table design example:

CREATE TABLE role (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(50) NOT NULL,
permission_id int(11) NOT NULL,
PRIMARY KEY (id),
KEY permission_id (permission_id),
CONSTRAINT role_permission_fk FOREIGN KEY (permission_id) REFERENCES permission (id )
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2. Permission management concept

In the mall system, different roles have different permissions. For example, administrators have the authority to manage users, products, and orders, while ordinary users can only purchase products. Therefore, different permissions need to be defined and assigned to different roles.

In the permission table, you can set the name and description of the permission. In the role table, you can specify the name of the role and the corresponding permissions.

3. Build an administrator system

Next, take the administrator system as an example to introduce how to implement the function of building an administrator system.

First, we need to create a login form for administrator login:

<form action="admin-login.php" method="post">
  <input type="text" name="username" placeholder="用户名">
  <input type="password" name="password" placeholder="密码">
  <input type="submit" value="登录">
</form>

In the admin-login.php file, verify the administrator's username and password, and check its permissions. If the login is successful, the administrator's information can be stored in the session for subsequent permission verification.

<?php
// 检查用户名和密码
$username = $_POST['username'];
$password = $_POST['password'];

// 在数据库中查询管理员信息
// 省略代码

// 验证密码
// 省略代码

// 检查权限
$permissionId = $admin['permission_id'];
// 在数据库中查询权限信息
// 省略代码

// 将管理员信息存储在session中
// 省略代码

// 跳转到管理员首页
header("Location: admin-index.php");

In the administrator homepage (admin-index.php), corresponding management functions can be displayed according to the administrator's permissions, such as user management, product management, and order management.

<?php
session_start();
if (isset($_SESSION['admin'])) {
  $admin = $_SESSION['admin'];
  $permissionId = $admin['permission_id'];
  
  // 根据权限显示相应的管理功能
  if ($permissionId == 1) {
    // 显示用户管理功能
    echo "用户管理";
  } elseif ($permissionId == 2) {
    // 显示商品管理功能
    echo "商品管理";
  } elseif ($permissionId == 3) {
    // 显示订单管理功能
    echo "订单管理";
  }
} else {
  // 未登录跳转到登录页
  header("Location: admin-login.php");
}

In the above code, the functions of user management, product management and order management are displayed respectively according to the administrator's permission ID. Functions can be displayed and expanded according to actual needs.

Through the above steps, we can build a basic permission management and administrator system. According to actual needs, other functions can also be expanded, such as role management, permission assignment, etc.

Summary

This article introduces how to use PHP to develop city functions and build permission management and administrator systems. By designing the database structure, defining permissions and roles, the administrator's login and permission verification are implemented. In the administrator system, different management functions are displayed according to the permission ID. These functions can be modified and expanded according to actual needs to meet the requirements of the mall system.

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