在短码[add_to_cart]中动态插入WooCommerce产品id

function add_to_cart_shortcode($atts) {
    $atts = shortcode_atts(array(
        'id' => ''
    ), $atts, 'add_to_cart');

    if (!empty($atts['id'])) {
        ob_start();
        ?>
        <form action="<?php echo esc_url(wc_get_cart_url()); ?>" method="post" class="cart">
            <?php
            echo '<input type="hidden" name="add-to-cart" value="' . esc_attr($atts['id']) . '" />';
            echo '<button type="submit" class="button alt">' . esc_html__('Add to Cart', 'woocommerce') . '</button>';
            ?>
        </form>
        <?php
        return ob_get_clean();
    }
}
add_shortcode('add_to_cart', 'add_to_cart_shortcode');