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

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

Inventory management is a very important part of enterprise management, and the purchase plan serves as the basis for inventory management. One of the core, the implementation of its written code is also extremely critical. This article will introduce how to use PHP to write the purchasing planning function code in the inventory management system and provide relevant code examples.

1. Requirements Analysis

Before writing the procurement planning function code, we need to analyze and clarify the requirements. The following are some common purchasing plan functional requirements, including but not limited to:

1. Automatically generate purchasing plans based on inventory conditions, sales forecasts and other data;
2. Purchasing items should be included in the purchasing plan , quantity, supplier and other information;
3. The procurement plan needs to support manual adjustment and modification;
4. After submitting the procurement plan, a purchase order needs to be generated.

Based on the above requirements, we can start writing code.

2. Code Implementation

1. Automatically Generate Procurement Plan

Assume that there is an inventory table in our inventory management system, which contains the inventory of each item. Fields such as current inventory (inventory_quantity) and sales forecast (sales_forecast). The following is a simplified code example that demonstrates how to automatically generate a purchasing plan based on inventory conditions and sales forecasts:

<?php
// 查询库存表并计算采购需求
$sql = "SELECT * FROM inventory";
$result = $conn->query($sql);

while($row = $result->fetch_assoc()) {
  $stock = $row['inventory_quantity'];
  $forecast = $row['sales_forecast'];

  $purchase_quantity = max(0, $forecast - $stock);

  // 将采购计划插入到purchase_plans表
  $sql = "INSERT INTO purchase_plans (item_id, purchase_quantity) VALUES ('" . $row['item_id'] . "', " . $purchase_quantity . ")";
  $conn->query($sql);
}

$result->free();
?>

2. Manually adjust the purchasing plan

In the inventory management system, Users may need to manually adjust the generated purchasing plan. The following is a simplified code example that demonstrates how to implement the manual adjustment function:

<?php
// 获取用户提交的采购计划调整信息
$item_id = $_POST['item_id'];
$purchase_quantity = $_POST['purchase_quantity'];

// 更新采购计划
$sql = "UPDATE purchase_plans SET purchase_quantity = " . $purchase_quantity . " WHERE item_id = '" . $item_id . "'";
$conn->query($sql);
?>

3. Generate purchase order

After the purchase plan is submitted, we need to generate purchases based on the purchase plan Order. The following is a simplified code example that demonstrates how to implement the purchase order generation function:

<?php
// 查询采购计划表
$sql = "SELECT * FROM purchase_plans";
$result = $conn->query($sql);

while($row = $result->fetch_assoc()) {
  $item_id = $row['item_id'];
  $purchase_quantity = $row['purchase_quantity'];
  
  // 创建采购订单
  $sql = "INSERT INTO purchase_orders (item_id, purchase_quantity, order_status) VALUES ('" . $item_id . "', " . $purchase_quantity . ", 'pending')";
  $conn->query($sql);
}

$result->free();
?>

3. Summary

Through the above code example, we can see how to use PHP to write inventory management systems Purchasing planning function code. Through functions such as automatically generating procurement plans, manually adjusting procurement plans, and generating purchase orders, it can help companies better manage inventory and improve supply chain efficiency.

Of course, the above is just a simplified example, and actual inventory management systems are often more complex. In actual development, we also need to consider issues such as data verification and permission control. I hope this article can provide readers with some reference and help when writing the purchasing planning function code of the inventory management system.

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