How to use PHP to implement an online gourmet home delivery system

In today's fast-paced life, more and more people choose to order food online for home delivery. In order to meet this demand, the gourmet home delivery system was born. So, how to use PHP language to implement an online gourmet home delivery system? This article will introduce it to you in detail.

Step One: Database Design

Before we start writing PHP programs, we need to design the database first to ensure the integrity and effectiveness of the data storage structure. Considering users, orders, dishes and other related information, we can design the following table structure:

User table (users):

Column name	Data type	Description
id	int	User ID
name	varchar	Username
pwd	varchar	Password
tel	varchar	Mobile phone number
addr	varchar	Shipping address

Orders table:

##idintOrder IDuserIdintUser IDtimedatetime下注Single timetotalintTotal amount (minutes)statusintOrder status (enumeration)

Column name	Data type	Description

Order details (order_detail):

Column nameData typeDescription##orderIdprodIdprodNamepriceqtyMenu list (prods):

int	OrderID
int	Dish ID
varchar	Dish name
int	Unit price (cents)
int	Quantity

Column name##idintDishIDnamevarcharDish namedesc varcharDescriptionintint

Data type	Description
		##price
Unit price (cents)		quantity
Inventory		Step 2: Create the project directory structure Before we start writing PHP programs, we also need to create the project directory structure first. Here I provide a more commonly used directory structure: |- pubilc | |- index.php | |- css | |- style.css | |- js | |- script.js | |- app | |- bootstrap.php | |- controller | | |- UserController.php | | |- ProdController.php | | |- OrderController.php | | | |- model | | |- User.php | | |- Prod.php | | |- Order.php | | | |- view | |- user | | |- login.php | | |- register.php | | | |- prod | | |- list.php | | |- detail.php | | | |- order | |- list.php | |- detail.php | |- config | |- db.php | |- vendor |- slim In the above directory structure, we can see that the pubilc directory stores all public resources, such as entry files (index.php), style sheets ( css) and script files (js), etc. The app directory is the core of the entire application and stores all code logic. The config directory stores some configuration files of the application. The last one is the vendor directory, which stores various third-party libraries. Here I use the Slim framework. Step Three: Write Code Now, we have completed the database design and creation of the project directory structure. Next, start writing the code for each business module in the app directory. Here, I will briefly introduce the functions of the main business modules: User module: Provides registration, login and logout functions. UserController.php: handles business logic such as user registration, login and logout. User.php: User class, used to implement user-related operations. Dish module: Provides functions such as browsing, querying and purchasing dishes. ProdController.php: handles business logic such as menu list, details and purchase. Prod.php: Dish category, used to implement dish-related operations. Order module: Provides functions such as browsing, querying and payment for user orders. OrderController.php: handles business logic such as order list, details and payment. Order.php: Order class, used to implement order-related operations. OrderDetail.php: Order detail class, used to implement operations related to order details. Here, we only give a code sample of UserController.php for reference: <?php namespace appcontroller; use appmodelUser; class UserController { protected $user; public function __construct() { $this->user = new User(); } public function register() { // 验证表单数据 // 省略...... // 调用模型层处理注册逻辑 $this->user->register($name, $pwd, $tel, $addr); // 注册成功后，跳转到登录页面 // 省略...... } public function login() { // 验证表单数据 // 省略...... // 调用模型层处理登录逻辑 if ($this->user->login($tel, $pwd)) { // 登录成功后，跳转到首页 // 省略...... } else { // 登录失败，提示错误信息 // 省略...... } } public function logout() { session_start(); session_destroy(); // 注销成功后，跳转到登录页面 // 省略...... } } Step 4: Use the framework When using PHP When implementing a gourmet home delivery system in language, you can choose to use some mature frameworks to simplify the development process. For example, we can download the latest version of the Slim framework through the composer tool to implement our project. The specific process of using the Slim framework is as follows: Install the Composer tool: curl -sS https://getcomposer.org/installer | php Create the composer.json file and add the following code: { "require": { "slim/slim": "^3.0" } } Run Composer to install the Slim framework package: php composer.phar install Add the following code in the entry file (index.php): require __DIR__ . '/../vendor/autoload.php'; $app = new SlimApp(); // 接下来，添加路由和控制器 // 例如： $app->get('/', function ($request, $response, $args) { $response->write("Hello Slim!"); return $response; }); $app->run(); At this point, we have completed the basic framework of the food home delivery system. The specific code implementation of other business modules can be further developed on this basis. Summary: In this article, we introduced the basic steps to implement an online gourmet home delivery system using PHP language. What needs special attention is that we need to design the database first, create the project directory structure, then implement the code of each business module, and finally use the framework to simplify the development process. At the same time, we can also add other functional modules according to actual needs, such as payment interfaces, logistics interfaces, etc., to achieve a more complete gourmet home delivery system.

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