Display the coupon used along with the percentage discount on order details and order notifications in WooCommerce

[sebastian-moran]

Display the coupon used along with the percentage discount on order details and order notifications in WooCommerce on child sites.

Snippet Type

Execute on Child Sites

Snippet

function filter_woocommerce_get_order_item_totals( $total_rows, $order, $tax_display ) {
    // Exit if there is no coupons applied
    if ( sizeof( $order->get_coupon_codes() ) == 0 ) return $total_rows;

    $new_total_rows = []; // Initializing

    foreach( $total_rows as $key => $total ) {
        $new_total_rows[$key] = $total;

        if ( $key == 'discount' ) {
            // Get used coupon codes only
            $coupon_codes = $order->get_coupon_codes();
            
            // Loop through WC_Order_Item_Coupon objects
            foreach ( $coupon_codes as $index => $coupon_code ) {
                // Get an instance of the WC_Coupon Object
                $coupon = new WC_Coupon( $coupon_code );

                // Discount type = percent & amount NOT empty
                if ( $coupon->get_discount_type() == 'percent' && ! empty ( $coupon->get_amount() ) ) {
                    $coupon_codes[$index] = $coupon_code . ' (' . $coupon->get_amount() . '%)';
                }
            }
            

            // Insert applied coupon codes in total lines after discount line
            $new_total_rows['coupon_codes'] = array(
                'label' => __( 'Applied coupons:', 'woocommerce' ),
                'value' => implode( ', ', $coupon_codes ),
            );
        }
    }

    return $new_total_rows;
}
add_filter( 'woocommerce_get_order_item_totals', 'filter_woocommerce_get_order_item_totals', 10, 3 );