PHPを使用して製品のマルチスペックSKUを実装するための技術と方法の詳細な説明

<?php
// 连接数据库
$conn = mysqli_connect('localhost', 'username', 'password', 'database');

// 查询商品规格
$query = "SELECT * FROM product";
$result = mysqli_query($conn, $query);

while ($row = mysqli_fetch_assoc($result)) {
    $product_id = $row['id'];
    $product_name = $row['name'];

    echo "商品ID：$product_id<br>";
    echo "商品名称：$product_name<br>";

    // 查询商品规格属性
    $query_spec = "SELECT specification.id, specification.name FROM specification
                   LEFT JOIN sku ON sku.specification_id = specification.id
                   WHERE sku.product_id = $product_id AND sku.stock > 0
                   GROUP BY specification.id";
    $result_spec = mysqli_query($conn, $query_spec);

    while ($row_spec = mysqli_fetch_assoc($result_spec)) {
        $specification_id = $row_spec['id'];
        $specification_name = $row_spec['name'];

        echo "规格属性ID：$specification_id<br>";
        echo "规格属性名称：$specification_name<br>";

        // 查询商品规格值
        $query_value = "SELECT sku.value FROM sku
                        WHERE sku.product_id = $product_id AND sku.specification_id = $specification_id
                        AND sku.stock > 0";
        $result_value = mysqli_query($conn, $query_value);

        while ($row_value = mysqli_fetch_assoc($result_value)) {
            $specification_value = $row_value['value'];

            echo "规格属性值：$specification_value<br>";
        }
    }
}

// 关闭数据库连接
mysqli_close($conn);
?>

<?php
// 连接数据库
$conn = mysqli_connect('localhost', 'username', 'password', 'database');

// 根据选择的规格查询SKU信息
$selected_specifications = $_POST['specifications']; // 假设用户选择的规格为一个数组，如array('颜色' => '红色', '尺寸' => 'XL')

$query_sku = "SELECT * FROM sku WHERE product_id = $product_id";
foreach ($selected_specifications as $specification => $value) {
    $query_sku .= " AND specification_id IN
                   (SELECT sku.specification_id FROM sku
                   WHERE sku.value = '$value')";
}

$result_sku = mysqli_query($conn, $query_sku);

while ($row_sku = mysqli_fetch_assoc($result_sku)) {
    $sku_id = $row_sku['id'];
    $sku_stock = $row_sku['stock'];
    $sku_price = $row_sku['price'];

    echo "SKU ID：$sku_id<br>";
    echo "库存：$sku_stock<br>";
    echo "价格：$sku_price<br>";
}

// 关闭数据库连接
mysqli_close($conn);
?>