PHPを使用してモールSKU機能を実装するコード例

CREATE TABLE `products` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(255) NOT NULL,
  `price` DECIMAL(10,2) NOT NULL,
  `description` TEXT,
  PRIMARY KEY (`id`)
);

CREATE TABLE `skus` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `product_id` int(11) NOT NULL,
  `size` VARCHAR(50) NOT NULL,
  `color` VARCHAR(50) NOT NULL,
  `stock` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (`product_id`) REFERENCES `products`(`id`) ON DELETE CASCADE
);

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
?>

function getProducts() {
    global $conn;

    $sql = "SELECT * FROM products";
    $result = $conn->query($sql);

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

function getSkusByProduct($product_id) {
    global $conn;

    $sql = "SELECT * FROM skus WHERE product_id = $product_id";
    $result = $conn->query($sql);

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

function updateStock($sku_id, $quantity) {
    global $conn;

    $sql = "UPDATE skus SET stock = stock - $quantity WHERE id = $sku_id";
    $conn->query($sql);
}