如何获取Magento 2中可配置产品的value_index

<?php
use Magento\Catalog\Model\ProductFactory;
use Magento\ConfigurableProduct\Model\Product\Type\Configurable;

// 获取可配置产品的实例
$configurableProduct = $objectManager->create(ProductFactory::class)->create()->load($productId);

// 确保该产品是可配置产品
if ($configurableProduct->getTypeId() === Configurable::TYPE_CODE) {
    // 获取可配置选项的集合
    $configurableOptions = $configurableProduct->getTypeInstance()->getConfigurableOptions($configurableProduct);

    // 遍历每个可配置选项
    foreach ($configurableOptions as $configurableOption) {
        // 获取每个选项的value_index
        foreach ($configurableOption as $option) {
            $valueIndex = $option['value_index'];
            // 在这里可以对value_index进行进一步的处理或使用
            echo $valueIndex;
        }
    }
}
?>