How to add sale tag?

Parameter Description：
Test A
Original Price：1000
Discounted Price：990
Test B
Original Price：1000

Vip Customer：1% off

There is no discount price for TestB products, and the plugin sets a discount of 1%, so the sale tag will not be displayed. How do I get started?

Sale tag Code

add_filter('woocommerce_sale_flash', 'mxp_custom_sale_flash', 10, 3);
function mxp_custom_sale_flash($text, $post, $product) {
    global $product;
    $percentage = round((($product->regular_price - $product->sale_price) / $product->regular_price) * 100);
    return '<span class="onsale">' . $percentage . '% off</span>';
}

• This topic was modified 2 years, 9 months ago by Leo.Lin.
• This topic was modified 2 years, 9 months ago by Leo.Lin.