<?php

if (!defined('ABSPATH')) {
    exit;
}
global $post, $product;
if ($product->is_on_sale()) {
    ?>

	<?php 
    echo apply_filters('woocommerce_sale_flash', '<span class="onsale">' . esc_html__('Sale!', 'woocommerce') . '</span>', $post, $product);
    ?>

	<?php 
}