仅当购物车项目具有特定元数据时，才从购物车页面中删除WooCommerce购物车数量选择器

function add_custom_metadata_field() {
    woocommerce_wp_text_input(
        array(
            'id' => 'custom_metadata',
            'label' => 'Custom Metadata',
            'desc_tip' => true,
            'description' => 'Enter the specific metadata for the product.',
        )
    );
}
add_action('woocommerce_product_options_general_product_data', 'add_custom_metadata_field');

function save_custom_metadata_field($post_id) {
    $custom_metadata = $_POST['custom_metadata'];
    if (!empty($custom_metadata)) {
        update_post_meta($post_id, 'custom_metadata', sanitize_text_field($custom_metadata));
    }
}
add_action('woocommerce_process_product_meta', 'save_custom_metadata_field');

function remove_quantity_selector_from_cart() {
    foreach (WC()->cart->get_cart() as $cart_item_key => $cart_item) {
        $product_id = $cart_item['product_id'];
        $custom_metadata = get_post_meta($product_id, 'custom_metadata', true);
        if (!empty($custom_metadata)) {
            // Remove quantity selector for products with specific metadata
            WC()->cart->remove_cart_item($cart_item_key);
        }
    }
}
add_action('woocommerce_before_cart', 'remove_quantity_selector_from_cart');