PHP development of enterprise resource planning (ERP) system that builds production planning and scheduling functions

PHP development to build an enterprise resource planning (ERP) system with production planning and scheduling functions

The enterprise resource planning (ERP) system is a system that integrates information from various departments of the enterprise. A system that realizes centralized management and coordination of enterprise resources. In the manufacturing field, an important function of the ERP system is production planning and scheduling (Production Planning and Scheduling).

The production planning and scheduling function can help enterprises reasonably arrange product production plans, make the best use of resources, and improve production efficiency and delivery capabilities. In this article, we will introduce how to use PHP to develop a simple ERP system with production planning and scheduling functions.

First, we need to create a database named "production_schedule" and create two tables in it: "products" and "production_orders". The "products" table is used to store product information, and the "production_orders" table is used to store production order information.

// 创建数据库连接
$conn = mysqli_connect('localhost', 'root', '', 'production_schedule');

// 创建"products"表格
$sql = "CREATE TABLE products (
    id INT(11) PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    quantity INT(11) NOT NULL
)";
mysqli_query($conn, $sql);

// 创建"production_orders"表格
$sql = "CREATE TABLE production_orders (
    id INT(11) PRIMARY KEY AUTO_INCREMENT,
    product_id INT(11) NOT NULL,
    quantity INT(11) NOT NULL,
    due_date DATE NOT NULL,
    CONSTRAINT FK_product_id FOREIGN KEY (product_id) REFERENCES products (id)
)";
mysqli_query($conn, $sql);

Next, we will implement a simple production planning and scheduling function, that is, calculate the date when each product should start production based on the product's production order information.

// 查询所有产品
$sql = "SELECT * FROM products";
$result = mysqli_query($conn, $sql);

// 循环处理每个产品
while ($row = mysqli_fetch_assoc($result)) {
    $product_id = $row['id'];

    // 查询该产品的所有生产订单，并按照截止日期从小到大排序
    $sql = "SELECT * FROM production_orders WHERE product_id = $product_id ORDER BY due_date ASC";
    $orders_result = mysqli_query($conn, $sql);

    // 计算起始日期为当前日期
    $start_date = date('Y-m-d');

    // 循环处理每个生产订单
    while ($order_row = mysqli_fetch_assoc($orders_result)) {
        $quantity = $order_row['quantity'];
        $due_date = $order_row['due_date'];

        // 计算该生产订单需要的天数
        $days = ceil($quantity / $row['quantity']);

        // 根据起始日期和需要的天数计算出结束日期，并更新下一个订单的起始日期
        $end_date = date('Y-m-d', strtotime($start_date . " + $days days"));
        $start_date = $end_date;

        // 更新生产订单的开始日期和结束日期
        $order_id = $order_row['id'];
        $sql = "UPDATE production_orders SET start_date = '$start_date', end_date = '$end_date' WHERE id = $order_id";
        mysqli_query($conn, $sql);
    }
}

Through the above code, we can calculate the date when each product should start production based on the product's production order information, and update the start date and end date in the production order table.

Using PHP to develop an ERP system with production planning and scheduling functions can help companies better arrange production plans and improve production efficiency and delivery capabilities. This article provides a simple sample code for readers to refer to and learn from. In the actual development process, function expansion and performance optimization also need to be carried out according to specific needs.

Summary:
This article introduces how to use PHP to develop a simple ERP system with production planning and scheduling functions. By creating databases and tables, and writing relevant code logic, we can realize the function of calculating the date when each product should start production based on the product's production order information. I hope this article can be helpful to readers when developing ERP systems or implementing production planning and scheduling functions.

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