Code generation for the inventory query and record function in the PHP inventory management system

For inventory management systems, the inventory query and record function is one of the very important functions. By recording every inventory query operation, the system administrator can view the inventory query records at any time and understand the operation of the system. When writing an inventory management system in PHP, we can implement the inventory query and record function through code generation.

First, we need to create a database table to store information related to inventory query records. Suppose we create a table named "inventory_query_records" with the following fields: id (record ID), user_id (user ID), query_time (query time), product_id (product ID), and quantity (query quantity).

Next, we can create a class named "InventoryQueryRecord" to handle operations such as adding, deleting, modifying, and checking inventory query records. First, we need to introduce the database connection related files at the beginning of the code.

<?php
require_once "db_connection.php";

class InventoryQueryRecord {
    private $conn;

    public function __construct() {
        // 初始化数据库连接
        $this->conn = db_connection();
    }

    public function addRecord($user_id, $product_id, $quantity) {
        // 添加库存查询记录
        $query = "INSERT INTO inventory_query_records (user_id, query_time, product_id, quantity)
                  VALUES ('$user_id', NOW(), '$product_id', '$quantity')";
        $result = $this->conn->query($query);

        if ($result) {
            return true;
        } else {
            return false;
        }
    }

    public function deleteRecord($id) {
        // 删除库存查询记录
        $query = "DELETE FROM inventory_query_records WHERE id = '$id'";
        $result = $this->conn->query($query);

        if ($result) {
            return true;
        } else {
            return false;
        }
    }

    public function getRecords($user_id) {
        // 获取指定用户的库存查询记录
        $query = "SELECT * FROM inventory_query_records WHERE user_id = '$user_id'";
        $result = $this->conn->query($query);

        if ($result->num_rows > 0) {
            $records = array();
            while ($row = $result->fetch_assoc()) {
                $records[] = $row;
            }
            return $records;
        } else {
            return false;
        }
    }
}
?>

In the above code, we define a constructor to initialize the database connection and provide adding records (addRecord) and deleting records (deleteRecord) And the method of getting records (getRecords).

Next, we can use this class in specific operations to complete the inventory query record function. For example, when performing an inventory query operation, we can call the addRecord method to add an inventory query record before the query results are returned. Suppose we have a file named "inventory.php" for processing inventory query operations. Here is an example:

<?php
require_once "InventoryQueryRecord.php";

$product_id = $_POST['product_id'];
$quantity = $_POST['quantity'];

// 进行库存查询操作

$queryRecord = new InventoryQueryRecord();
$queryRecord->addRecord($user_id, $product_id, $quantity);

// 返回查询结果
?>

Through the above code example, we have successfully implemented PHP writing in the inventory management system. The inventory query recording function performs the code generation process. By recording every inventory query operation, we can conduct system management and data analysis more conveniently. Of course, based on actual needs, we can further improve this function, such as adding query conditions, adding permission controls, etc., to meet specific business needs.

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