Code generation for product return function in PHP inventory management system

Code generation for the product return function in the PHP inventory management system

In the inventory management system, the product return function is a very important function. When a customer purchases a product that has quality issues or the customer changes their mind, they may need to return the product and request a refund or replacement. Therefore, we need to provide corresponding code support for the product return function in the system.

First of all, we need a database to store product information, including product name, price, inventory quantity, etc. Suppose we have created a database table named "products" that contains the following fields: id, name, price, and quantity.

Next, we need to create a PHP script to handle the product return function. The following is a simple sample code:

 0) {
        $row = mysqli_fetch_assoc($result);
        $currentQuantity = $row['quantity'];
        $newQuantity = $currentQuantity + $quantity;

        // 更新库存数量
        $updateSql = "UPDATE products SET quantity = $newQuantity WHERE id = $id";
        if (mysqli_query($conn, $updateSql)) {
            echo "退货成功！";
        } else {
            echo "更新库存数量失败：" . mysqli_error($conn);
        }
    } else {
        echo "未找到对应的商品信息！";
    }
}

// 关闭数据库连接
mysqli_close($conn);
?>

In the above code, we first connect to the database and obtain the product id and quantity submitted in the return request through $_POST. Then, we query the database to find the corresponding product information and calculate the new inventory quantity. Finally, we use the UPDATE statement to update the inventory quantity and output the corresponding prompt information based on the update results.

In the HTML part, we can add a return form so that users can enter the returned item ID and quantity and submit a return request:

    
商品退货
    

        商品ID：
        


        退货数量：
        


        
    

With the above code example, we can implement a simple Product return function, and update the corresponding inventory quantity after the user returns the product. Of course, this is just a simple example, and actual returns functionality may involve more details and verification. But this basic framework can give you a starting point for adding merchandise returns functionality to your inventory management system.

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