PHPを使用してERPシステムに販売モジュール機能を構築する

<?php
// 创建销售订单
function createSalesOrder($customerName, $product, $quantity) {
    // 在数据库中插入订单数据
    $sql = "INSERT INTO sales_orders (customer_name, product, quantity) 
            VALUES ('$customerName', '$product', $quantity)";
    mysqli_query($conn, $sql);
    
    // 更新库存数量
    updateStock($product, $quantity);
    
    // 生成订单号
    $orderId = generateOrderId();
    
    return $orderId;
}

// 更新库存数量
function updateStock($product, $quantity) {
    // 查找当前库存数量
    $sql = "SELECT quantity FROM stock WHERE product = '$product'";
    $result = mysqli_query($conn, $sql);
    $row = mysqli_fetch_assoc($result);
    
    // 更新库存数量
    $newQuantity = $row['quantity'] - $quantity;
    $sql = "UPDATE stock SET quantity = $newQuantity WHERE product = '$product'";
    mysqli_query($conn, $sql);
}

// 生成订单号
function generateOrderId() {
    // 可以根据一定的规则生成订单号
    $orderId = uniqid();
    
    return $orderId;
}

// 示例用法
$customerName = "John Doe";
$product = "Example Product";
$quantity = 10;
$orderId = createSalesOrder($customerName, $product, $quantity);

echo "销售订单已成功创建，订单号为：$orderId";
?>

<?php
// 创建客户
function createCustomer($name, $email, $phone) {
    // 在数据库中插入客户数据
    $sql = "INSERT INTO customers (name, email, phone) 
            VALUES ('$name', '$email', '$phone')";
    mysqli_query($conn, $sql);
    
    // 返回新创建客户的ID
    $customerId = mysqli_insert_id($conn);
    
    return $customerId;
}

// 更新客户信息
function updateCustomer($customerId, $name, $email, $phone) {
    // 更新数据库中客户数据
    $sql = "UPDATE customers SET name = '$name', email = '$email', phone = '$phone' WHERE id = $customerId";
    mysqli_query($conn, $sql);
}

// 删除客户
function deleteCustomer($customerId) {
    // 从数据库中删除客户数据
    $sql = "DELETE FROM customers WHERE id = $customerId";
    mysqli_query($conn, $sql);
}

// 示例用法
$name = "John Doe";
$email = "johndoe@example.com";
$phone = "1234567890";

$customerId = createCustomer($name, $email, $phone);

echo "新客户已创建，客户ID为：$customerId";
?>

<?php
// 查询库存数量
function getStockQuantity($product) {
    // 查询数据库中当前库存数量
    $sql = "SELECT quantity FROM stock WHERE product = '$product'";
    $result = mysqli_query($conn, $sql);
    $row = mysqli_fetch_assoc($result);
    
    return $row['quantity'];
}

// 示例用法
$product = "Example Product";
$quantity = getStockQuantity($product);

echo "产品 '$product' 的库存数量为：$quantity";
?>

<?php
// 生成销售报表
function generateSalesReport($startDate, $endDate) {
    // 查询数据库中的销售订单数据
    $sql = "SELECT * FROM sales_orders WHERE order_date BETWEEN '$startDate' AND '$endDate'";
    $result = mysqli_query($conn, $sql);
    
    // 处理查询结果并生成报表
    $salesReport = array();
    while ($row = mysqli_fetch_assoc($result)) {
        $salesReport[] = array(
            'order_id' => $row['order_id'],
            'customer_name' => $row['customer_name'],
            'product' => $row['product'],
            'quantity' => $row['quantity']
        );
    }
    
    return $salesReport;
}

// 示例用法
$startDate = "2022-01-01";
$endDate = "2022-01-31";

$salesReport = generateSalesReport($startDate, $endDate);

echo "销售报表如下：";
var_dump($salesReport);
?>