To show the sale badge discount percentage for 'Advanced Woo Labels' plugin

Display the discount percentage on the sale badge using the 'Advanced Woo Labels' plugin.

add_filter('awl_current_label_markup', function ($label_html, $position_type, $label){
    global $product;
    if (is_object($product)) {
        $discount_percentage = apply_filters('advanced_woo_discount_rules_get_product_discount_percentage', 0, $product);
        if ($discount_percentage > 0) {
            return '<span class="onsale">' . $discount_percentage .'%' . '</span>';
        }
    }
    return $label_html;
}, 100, 3);