Second-hand recycling website developed by PHP supports multiple transaction methods

The second-hand recycling website developed by PHP supports a variety of transaction methods

With the development of the Internet, second-hand recycling has become an increasingly popular way, which can not only help people dispose of idle items, but also Achieve resource reuse. In order to meet people's needs for second-hand recycling, we decided to develop a second-hand recycling website based on PHP that supports multiple transaction methods.

Website Architecture

In order to support multiple transaction methods, we can adopt the MVC (Model-View-Controller) design pattern. Briefly introduce the three core components of MVC:

• Model: responsible for interacting with the database and processing data logic
• View: responsible for displaying data and interacting with users
• Controller: Responsible for receiving user requests and coordinating the interaction between Model and View

The following is a simple file structure example:

project/
├── app/
│   ├── controllers/
│   │   ├── PostController.php
│   │   ├── UserController.php
│   │   └── ...
│   ├── models/
│   │   ├── PostModel.php
│   │   ├── UserModel.php
│   │   └── ...
│   └── views/
│       ├── post/
│       │   ├── index.php
│       │   ├── create.php
│       │   ├── edit.php
│       │   └── ...
│       ├── user/
│       │   ├── index.php
│       │   ├── login.php
│       │   ├── register.php
│       │   └── ...
│       └── ...
├── public/
│   ├── css/
│   ├── js/
│   └── img/
└── index.php

Database design

In this In the second-hand recycling website, we need two core database tables: users and posts. The users table is used to store user information, and the posts table is used to store second-hand item information.

The following is a simple database table design example:

CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    username VARCHAR(255) UNIQUE NOT NULL,
    password VARCHAR(255) NOT NULL,
    email VARCHAR(255) UNIQUE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE posts (
    id INT PRIMARY KEY AUTO_INCREMENT,
    user_id INT,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    price DECIMAL(10, 2) NOT NULL,
    status ENUM('active', 'sold') DEFAULT 'active',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY(user_id) REFERENCES users(id)
);

Transaction method

In order to support multiple transaction methods, we can add the following to the posts table Add a new field payment_method. In the code, we can use constants to represent different payment methods.

class PostModel extends Model
{
    // ...
    const PAYMENT_METHOD_CASH = 'cash';
    const PAYMENT_METHOD_BANK_TRANSFER = 'bank_transfer';
    const PAYMENT_METHOD_PAYPAL = 'paypal';
    const PAYMENT_METHOD_ALIPAY = 'alipay';
    // ...
}

In the form for submitting second-hand items, we can add a drop-down menu to allow users to choose the payment method:

<select name="payment_method">
    <option value="<?php echo PostModel::PAYMENT_METHOD_CASH; ?>">现金</option>
    <option value="<?php echo PostModel::PAYMENT_METHOD_BANK_TRANSFER; ?>">银行转账</option>
    <option value="<?php echo PostModel::PAYMENT_METHOD_PAYPAL; ?>">PayPal</option>
    <option value="<?php echo PostModel::PAYMENT_METHOD_ALIPAY; ?>">支付宝</option>
</select>

Processing of transaction methods

When processing submitted second-hand items When providing item information, we can process it differently based on the selected payment method. For example, if the PAYPAL payment method is selected, we can call PayPal's API to handle the payment process.

class PostController extends Controller
{
    // ...
    public function create()
    {
        // ...
        
        $paymentMethod = $_POST['payment_method'];
        
        if ($paymentMethod == PostModel::PAYMENT_METHOD_PAYPAL) {
            // 调用PayPal API进行付款处理
            // ...
        }
        
        // ...
    }
}

Summary

By using PHP to develop a second-hand recycling website, we can support a variety of transaction methods and provide users with more flexible transaction options. We can also make other extensions based on needs, such as integrating APIs from third-party payment platforms to provide more convenient payment methods. Such second-hand recycling websites can not only meet the needs of users, but also promote resource recycling and play a positive role in environmental protection.

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