How to use PHP to write the order distribution function code in the inventory management system

How to use PHP to write the order distribution function code in the inventory management system

1. Introduction
In an inventory management system, the order distribution function is a very important part. The purpose of the order delivery function is to deliver the user's order to the address designated by the user. In this article, we will use PHP language to write a simple order delivery function code example. We will use a MySQL database to store order and address information.

2. Create a database
First, we need to create a database to store order and address information. We can use the following SQL statement to create a database named "inventory_management" and create a table named "orders" to store order information:

CREATE DATABASE inventory_management;

USE inventory_management;

CREATE TABLE orders (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT,
    product_id INT,
    quantity INT,
    address VARCHAR(255),
    status INT
);

This table contains the order ID, user ID, Product ID, quantity, address and delivery status.

3. Write PHP code
Next, we start writing the PHP code for the order delivery function. First, we need to create an order_delivery.php file and create a class named Delivery:

<?php

class Delivery {
    private $db;

    public function __construct() {
        $this->db = new mysqli('localhost', 'username', 'password', 'inventory_management');

        if ($this->db->connect_errno) {
            die('连接失败: ' . $this->db->connect_error);
        }
    }

    public function deliverOrder($orderId) {
        // 检查订单是否存在
        $orderExists = $this->checkOrderExists($orderId);

        if (!$orderExists) {
            die('订单不存在');
        }

        // 检查订单配送状态
        $orderStatus = $this->checkOrderStatus($orderId);

        if ($orderStatus == 1) {
            die('订单已配送');
        }

        // 更新订单配送状态为已配送
        $updateQuery = "UPDATE orders SET status = 1 WHERE id = '$orderId'";

        if ($this->db->query($updateQuery)) {
            echo '订单配送成功';
        } else {
            echo '订单配送失败';
        }
    }

    private function checkOrderExists($orderId) {
        $query = "SELECT id FROM orders WHERE id = '$orderId'";

        $result = $this->db->query($query);

        if ($result->num_rows > 0) {
            return true;
        } else {
            return false;
        }
    }

    private function checkOrderStatus($orderId) {
        $query = "SELECT status FROM orders WHERE id = '$orderId'";

        $result = $this->db->query($query);

        if ($result) {
            $row = $result->fetch_assoc();

            return $row['status'];
        } else {
            return null;
        }
    }
}

?>

This class contains a constructor to connect to the database. It also contains a deliverOrder method for delivering orders. In this method, we first check if the order exists and then check the delivery status of the order. If the order exists and the delivery status is Undelivered, update the order's delivery status to Delivered.

4. Using code examples
Next, we can use this Delivery class in other files. In this example, we create a file named "deliver.php" to handle order delivery requests:

<?php

require_once('order_delivery.php');

$delivery = new Delivery();

$orderId = $_GET['order_id'];

$delivery->deliverOrder($orderId);

?>

Visit "deliver.php?order_id=1" in the browser, where order_id is The ID of the order you want to ship. If the order exists and is successfully delivered, you will see the message "Order Delivered Successfully".

5. Summary
Through this simple example, we learned how to use PHP to write the order distribution function code in the inventory management system. We created a database to store order information and used PHP and MySQL to process and query the order data. In an actual inventory management system, you may also need to add more functions and validations to ensure the accuracy and completeness of order delivery. This example is just a basic starting point that will hopefully help you get started writing your own order fulfillment functionality.

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