Display Sale Price Before Regular Price (WooCommerce) (ok)

https://stackoverflow.com/questions/41410174/display-sale-price-before-regular-price-woocommerce

// Display Sale Price Before Regular Price 
if (!function_exists('my_commonPriceHtml')) {

    function my_commonPriceHtml($price_amt, $regular_price, $sale_price) {
        $html_price = '<p class="price">';
        //if product is in sale
        if (($price_amt == $sale_price) && ($sale_price != 0)) {
            $html_price .= '<ins>' . wc_price($sale_price) . '</ins>';
            $html_price .= '<del>' . wc_price($regular_price) . '</del>';
        }
        //in sale but free
        else if (($price_amt == $sale_price) && ($sale_price == 0)) {
            $html_price .= '<ins>Free!</ins>';
            $html_price .= '<del>' . wc_price($regular_price) . '</del>';
        }
        //not is sale
        else if (($price_amt == $regular_price) && ($regular_price != 0)) {
            $html_price .= '<ins>' . wc_price($regular_price) . '</ins>';
        }
        //for free product
        else if (($price_amt == $regular_price) && ($regular_price == 0)) {
            $html_price .= '<ins>Free!</ins>';
        }
        $html_price .= '</p>';
        return $html_price;
    }

}

add_filter('woocommerce_get_price_html', 'my_simple_product_price_html', 100, 2);

function my_simple_product_price_html($price, $product) {
    if ($product->is_type('simple')) {
        $regular_price = $product->get_regular_price();
        $sale_price = $product->get_sale_price();
        $price_amt = $product->get_price();
        return my_commonPriceHtml($price_amt, $regular_price, $sale_price);
    } else {
        return $price;
    }
}

add_filter('woocommerce_variation_sale_price_html', 'my_variable_product_price_html', 10, 2);
add_filter('woocommerce_variation_price_html', 'my_variable_product_price_html', 10, 2);

function my_variable_product_price_html($price, $variation) {
    $variation_id = $variation->variation_id;
    //creating the product object
    $variable_product = new WC_Product($variation_id);

    $regular_price = $variable_product->get_regular_price();
    $sale_price = $variable_product->get_sale_price();
    $price_amt = $variable_product->get_price();

    return my_commonPriceHtml($price_amt, $regular_price, $sale_price);
}

add_filter('woocommerce_variable_sale_price_html', 'my_variable_product_minmax_price_html', 10, 2);
add_filter('woocommerce_variable_price_html', 'my_variable_product_minmax_price_html', 10, 2);

function my_variable_product_minmax_price_html($price, $product) {
    $variation_min_price = $product->get_variation_price('min', true);
    $variation_max_price = $product->get_variation_price('max', true);
    $variation_min_regular_price = $product->get_variation_regular_price('min', true);
    $variation_max_regular_price = $product->get_variation_regular_price('max', true);

    if (($variation_min_price == $variation_min_regular_price) && ($variation_max_price == $variation_max_regular_price)) {
        $html_min_max_price = $price;
    } else {
        $html_price = '<p class="price">';
        $html_price .= '<ins>' . wc_price($variation_min_price) . '-' . wc_price($variation_max_price) . '</ins>';
        $html_price .= '<del>' . wc_price($variation_min_regular_price) . '-' . wc_price($variation_max_regular_price) . '</del>';
        $html_min_max_price = $html_price;
    }

    return $html_min_max_price;
}