Magento 2 中准确获取产品最终价格的教程

<?php

use Magento\Catalog\Api\Data\ProductInterface;
use Magento\Catalog\Api\ProductRepositoryInterface;

class MyPriceCalculator
{
    /**
     * @var ProductRepositoryInterface
     */
    protected $productRepository;

    public function __construct(
        ProductRepositoryInterface $productRepository
    ) {
        $this->productRepository = $productRepository;
    }

    /**
     * 获取简单产品的常规价格和特殊价格
     *
     * @param string $sku 产品SKU
     * @return array|null
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     */
    public function getSimpleProductPrices(string $sku): ?array
    {
        /** @var ProductInterface $product */
        $product = $this->productRepository->get($sku);

        if ($product->getTypeId() == 'simple') {
            $priceInfo = $product->getPriceInfo();

            // 获取常规价格
            $regularPrice = $priceInfo->getPrice('regular_price')->getValue();

            // 获取特殊价格 (可能受目录规则影响)
            $specialPrice = $priceInfo->getPrice('special_price')->getValue();

            // 最终价格通常是常规价格和特殊价格中的较小值
            $finalPrice = min($regularPrice, $specialPrice);

            return [
                'regular_price' => $regularPrice,
                'special_price' => $specialPrice,
                'final_price' => $finalPrice
            ];
        }

        return null;
    }
}

<?php

use Magento\Catalog\Api\Data\ProductInterface;
use Magento\Catalog\Api\ProductRepositoryInterface;

class MyPriceCalculator
{
    /**
     * @var ProductRepositoryInterface
     */
    protected $productRepository;

    public function __construct(
        ProductRepositoryInterface $productRepository
    ) {
        $this->productRepository = $productRepository;
    }

    /**
     * 获取可配置产品的价格信息
     *
     * @param string $sku 产品SKU
     * @return array|null
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     */
    public function getConfigurableProductPrices(string $sku): ?array
    {
        /** @var ProductInterface $product */
        $product = $this->productRepository->get($sku);

        if ($product->getTypeId() == 'configurable') {
            $priceInfo = $product->getPriceInfo();

            // 获取最低常规价格
            // 对于可配置产品，regular_price可能是一个范围，这里获取其最小值
            $minRegularPrice = $priceInfo->getPrice('regular_price')->getMinRegularAmount()->getValue();

            // 获取可配置产品的最终价格
            // 对于可配置产品，getFinalPrice()通常能正确计算出基于子产品和规则的最低最终价格
            $finalPrice = $product->getFinalPrice(); 

            return [
                'min_regular_price' => $minRegularPrice,
                'final_price' => $finalPrice
            ];
        }

        return null;
    }
}