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

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

Introduction:
The inventory management system is an indispensable part of the daily operations of the enterprise. It helps companies update inventory information, predict replenishment needs, improve procurement efficiency, etc. The inventory recycling function is an important link in the inventory management system. It can help companies effectively deal with expired, damaged or no-longer-sold inventory, thereby saving costs and space. This article will introduce how to use PHP to write the inventory recycling function code in the inventory management system, and provide code examples for reference.

1. Database design
Before starting to write the inventory recycling function, we first need to design a database structure suitable for storing inventory information. The following is a simple example:

Inventory table (stock):

| id (primary key) | name| quantity| date|

| 1 | Product A | 10 | 2021-01-01 |

| 2 | Product B | 5 | 2021-02-15 |

| 3 | Product C | 15 | 2021-03-10 |

2. Inventory recycling function code
Next, we can start writing the inventory recycling function code. Below is a simple example that covers the main steps of inventory recycling:

1. Connect to the database
   First, we need to connect to the database through PHP code in order to interact with the inventory table. Use the following code example:

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

2. Query expired inventory
   Next, we need to query expired inventory for recycling processing. Use the following code example:

$currentDate = date("Y-m-d");
$sql = "SELECT * FROM stock WHERE 日期 < '$currentDate'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        // 处理过期库存
        $id = $row["id"];
        $name = $row["名称"];
        $quantity = $row["数量"];

        // 代码写在这里，可以根据需求执行不同的回收操作

        echo "回收了过期库存：$name (数量：$quantity)
";
    }
} else {
    echo "没有过期库存需要回收";
}

3. Update inventory information
   After completing the inventory recycling, we need to update the quantity information of the inventory table. Use the following code example:

// 根据回收操作更新库存数量
$sql = "UPDATE stock SET 数量 = 数量 - 1 WHERE id = $id";
if ($conn->query($sql) === TRUE) {
    echo "库存更新成功";
} else {
    echo "库存更新失败: " . $conn->error;
}

4. Close the database connection
   Finally, after completing the inventory recycling and updating, we need to close the database connection. Use the following code example:

$conn->close();

3. Summary
Through the above steps, we can complete a simple PHP code for inventory recycling function. Of course, in actual applications, we may perform more customization and optimization based on specific business needs. I hope this article can help you, and I wish you good results in the development of your inventory management system!

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