Show Striked Out Price Range for Variable Products in WooCommerce

display_striked_out_price_for_variable.php

add_filter('woocommerce_get_price_html', 'display_striked_out_price_for_variable', 200, 2);
function display_striked_out_price_for_variable($price='', $product)
{
    if (!$product->is_on_sale()){
        return $price;
    }
    if ($product->is_type('variable')) {
        $variations = $product->get_available_variations();
        $regular_prices = array();
        $sale_prices = array();

        foreach ($variations as $variation) {
            $variation_obj = wc_get_product($variation['variation_id']);
            $regular_price = $variation_obj->get_regular_price();
            $sale_price = $variation_obj->get_sale_price();

            if ($regular_price !== '' && $sale_price !== '') {
                $regular_prices[] = $regular_price;
                $sale_prices[] = $sale_price;
            }
        }

        sort($regular_prices);
        sort($sale_prices);

        $min_regular_price = count($regular_prices) > 0 ? min($regular_prices) : '';
        $max_regular_price = count($regular_prices) > 0 ? max($regular_prices) : '';
        $min_sale_price = count($sale_prices) > 0 ? min($sale_prices) : '';
        $max_sale_price = count($sale_prices) > 0 ? max($sale_prices) : '';

        $regular_price_html = '';
        $sale_price_html = '';

        if ($min_regular_price === $max_regular_price) {
            $regular_price_html = wc_price($min_regular_price);
        } else {
            $regular_price_html = wc_format_price_range($min_regular_price, $max_regular_price);
        }

        if ($min_sale_price === $max_sale_price) {
            $sale_price_html = wc_price($min_sale_price);
        } else {
            $sale_price_html = wc_format_price_range($min_sale_price, $max_sale_price);
        }

        return wc_format_sale_price($regular_price_html, $sale_price_html);
    }
    return $price;
}