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

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

Inventory management is an indispensable part of many enterprises. For companies with multiple warehouses, the inventory management function is particularly important. By properly managing and tracking inventory, companies can allocate inventory between different warehouses, optimize operating costs, and improve collaboration efficiency. This article will introduce how to use PHP to write code for inventory warehouse management functions, and provide you with relevant code examples.

1. Establish a database

Before we start writing the code for the inventory management function, we need to establish the corresponding database first. Assume that the information we need to record includes: warehouse ID, product ID, and inventory quantity. We can create a database named inventory and create a table named stock in it. The table structure is as follows:

CREATE DATABASE inventory;

USE inventory;

CREATE TABLE stock (
   id INT AUTO_INCREMENT PRIMARY KEY,
   warehouse_id INT,
   product_id INT,
   quantity INT
);

2. Connect to the database

In the PHP code, we need to connect to Database for data manipulation. You can use the mysqli extension to implement database connection. The specific code is as follows:

<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "inventory";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接数据库失败：" . $conn->connect_error);
}
?>

Please modify $servername, $username, $password and $dbname in the code to your corresponding values ​​according to your actual database configuration.

3. Realize the inventory warehouse management function

1. Add inventory records

First, we need to implement the function of adding inventory records. Insert a new inventory record based on the warehouse ID, product ID and quantity. The specific code is as follows:

<?php
function addStockRecord($warehouseId, $productId, $quantity) {
    global $conn;
    
    $sql = "INSERT INTO stock (warehouse_id, product_id, quantity) VALUES ($warehouseId, $productId, $quantity)";
    if ($conn->query($sql) === TRUE) {
        echo "库存记录添加成功";
    } else {
        echo "添加库存记录失败：" . $conn->error;
    }
}
?>

2. Update inventory records

Secondly, we need to implement the function of updating inventory records. Update the inventory quantity based on the warehouse ID and product ID. The specific code is as follows:

<?php
function updateStockRecord($warehouseId, $productId, $newQuantity) {
    global $conn;
    
    $sql = "UPDATE stock SET quantity = $newQuantity WHERE warehouse_id = $warehouseId AND product_id = $productId";
    if ($conn->query($sql) === TRUE) {
        echo "库存记录更新成功";
    } else {
        echo "更新库存记录失败：" . $conn->error;
    }
}
?>

3. Query inventory records

Finally, we need to implement the function of querying inventory records. We can obtain the corresponding inventory quantity based on the warehouse ID and product ID. The specific code is as follows:

<?php
function getStockQuantity($warehouseId, $productId) {
    global $conn;
    
    $sql = "SELECT quantity FROM stock WHERE warehouse_id = $warehouseId AND product_id = $productId";
    $result = $conn->query($sql);
    
    if ($result->num_rows > 0) {
        $row = $result->fetch_assoc();
        return $row["quantity"];
    } else {
        return 0;
    }
}
?>

4. Test code

After completing the code writing of the above functions, we can conduct a simple test. The following is a sample code to demonstrate how to use the above code to implement the inventory warehouse management function:

<?php
include "database.php";

// 添加库存记录
addStockRecord(1, 1, 100);
addStockRecord(2, 1, 200);

// 更新库存记录
updateStockRecord(1, 1, 50);

// 查询库存记录
echo getStockQuantity(1, 1);
?>

The execution result of the above code should be 50, indicating that the inventory record is updated successfully.

5. Summary

Through the above sample code, you can understand how to use PHP to write code for the inventory warehouse management function. Of course, actual requirements may be more complex, and you can make corresponding modifications and expansions according to your business needs. Through reasonable inventory management, you can improve inventory operation efficiency, reduce costs, and achieve better business development. Hope this article helps you!

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