Php 根据页面以及是否在促销，向 WooCommerce 中显示的价格添加前缀

以下代码将根据产品是否在销售以及页面类型(single product, shop, archives, cart and checkout)的不同，向显示的价格添加不同的字符串前缀:

add_filter( 'woocommerce_get_price_html', 'add_string_prefix_to_price_html', 10, 2 );
function add_string_prefix_to_price_html( $price_html, $product ) { 
    global $woocommerce_loop;

    // Not on related products
    if ( isset($woocommerce_loop['name']) && $woocommerce_loop['name'] === 'related' ) {
        return $price_html; 
    }

    $prefix = ''; // Initializing

    // Set the text by section type
    if ( is_shop() ) {
        if ( $product->is_on_sale() ){ 
            $prefix = __('ON SALE SHOP', 'woocommerce') . ' ';
        } else {
            $prefix = __('NORMAL SHOP', 'woocommerce') . ' '; // optional
        }
    } elseif( is_tax() ) {
        if ( $product->is_on_sale() ){ 
            $prefix = __('ON SALE ARCHIVES', 'woocommerce') . ' ';
        } else {
            $prefix = __('NORMAL ARCHIVES', 'woocommerce') . ' '; // optional
        }
    } elseif( is_product() ) {
        if ( $product->is_on_sale() ){ 
            $prefix = __('ON SALE PRODUCT', 'woocommerce') . ' ';
        } else {
            $prefix = __('NORMAL PRODUCT', 'woocommerce') . ' '; // optional
        }
    } else {
        if ( $product->is_on_sale() ){ 
            $prefix = __('ON SALE OTHERS', 'woocommerce') . ' ';
        } else {
            $prefix = __('NORMAL OTHERS', 'woocommerce') . ' '; // optional
        }
    }
    return $prefix . $price_html; 
}

// For cart (optional)
add_filter( 'woocommerce_cart_item_price', 'add_string_prefix_to_cart_item_price_html', 10, 2 ); 
function add_string_prefix_to_cart_item_price_html( $price_html, $cart_item ) {
    $prefix = ''; // Initializing
    
    if ( $cart_item['data']->is_on_sale() ){ 
        $prefix = __('ON SALE CART', 'woocommerce') . ' ';
    } else {
        $prefix = __('NORMAL CART', 'woocommerce') . ' '; // optional
    }
    return $prefix . $price_html;
}

// For checkout (optional)
add_filter( 'woocommerce_cart_item_subtotal', 'add_string_prefix_to_checkout_item_subtotal_html', 10, 2 );
function add_string_prefix_to_checkout_item_subtotal_html( $subtotal_html, $cart_item ) {
    $prefix = ''; // Initializing

    if( is_checkout() ) {
        if ( $cart_item['data']->is_on_sale() ){ 
            $prefix = __('ON SALE CHECKOUT', 'woocommerce') . ' ';
        } else {
            $prefix = __('NORMAL CHECKOUT', 'woocommerce') . ' '; // optional
        }
    }
    return $prefix . $subtotal_html;
}

代码位于您的子主题的unctions.php文件中(或在插件中).经过测试，效果良好.