WooCommerce结账页面小计与总计显示双货币问题排查

Hey there, let's tackle this problem together. The issue with using wc_price is that it affects all price displays across your site, but you only need the dual currency (ETH + USD) on the subtotal and total lines in checkout. Instead, we should target the specific order total rows with a more precise hook.

Solution Code #

First, let's adjust your approach to focus only on the checkout totals section:

// Reusable function to convert ETH price to USD
function convert_eth_to_usd( $eth_price ) {
    $conversion_rate = 780.730022; // Update this rate regularly for accuracy
    $usd_price = $eth_price * $conversion_rate;
    return number_format( $usd_price, 2, '.', ',' );
}

// Modify checkout subtotal and total to show dual currencies
add_filter( 'woocommerce_get_order_item_totals', 'display_dual_currency_on_checkout_totals', 10, 3 );
function display_dual_currency_on_checkout_totals( $total_rows, $order, $tax_display ) {
    // Only run this on the checkout page (not order receipts or admin)
    if ( is_checkout() && ! is_wc_endpoint_url() ) {
        // Update Subtotal line
        if ( isset( $total_rows['cart_subtotal'] ) ) {
            $eth_subtotal = $order->get_subtotal();
            $usd_subtotal = convert_eth_to_usd( $eth_subtotal );
            $total_rows['cart_subtotal']['value'] = "ETH " . number_format( $eth_subtotal, 2 ) . " ($ " . $usd_subtotal . ")";
        }

        // Update Total line
        if ( isset( $total_rows['order_total'] ) ) {
            $eth_total = $order->get_total();
            $usd_total = convert_eth_to_usd( $eth_total );
            $total_rows['order_total']['value'] = "ETH " . number_format( $eth_total, 2 ) . " ($ " . $usd_total . ")";
        }
    }

    return $total_rows;
}

Key Details #

• Targeted Hook: woocommerce_get_order_item_totals is designed specifically for modifying the rows in the checkout totals table, so it won't mess up price displays elsewhere on your site.
• Reusable Conversion: We kept your conversion logic in a dedicated function for easy updates (you could even replace the static rate with an API call later to get real-time prices).
• Checkout-Only Execution: The is_checkout() check ensures this only runs on the checkout page, not on order confirmation pages or in the admin dashboard.

Quick Troubleshooting #

• If your theme uses custom keys for totals (instead of cart_subtotal or order_total), add var_dump($total_rows); inside the function temporarily to see the exact keys your theme uses.
• If taxes are applied and you want dual currencies there too, you can add similar logic for rows like tax or shipping_tax.

内容的提问来源于stack exchange，提问作者Roger van Eijk