snippet-woo.php

/**
 * Вывод скидки по купону в подытогах каждого товара
 *
 * @param $product_subtotal
 * @param $product
 * @param $quantity
 * @param $cart
 *
 * @return string
 */
function art_add_discount_in_subtotal( $product_subtotal, $product, $quantity, $cart ) {

	$coupons       = WC()->cart->get_coupons();
	$coupon_amount = 0;

	foreach ( $coupons as $code => $coupon ) {
		if ( 'percent' === $coupon->get_discount_type() ) {
			$coupon_amount += (int) $coupon->get_amount();
		}
	}

	if ( $coupon_amount ) {
		$price     = $product->get_price();
		$row_price = $price * $quantity;

		$price_coupon     = $price - $price * (int) $coupon_amount / 100;
		$row_price_coupon = $price_coupon * $quantity;

		return wc_format_sale_price( $row_price, $row_price_coupon ) . $product->get_price_suffix();
	}

	return $product_subtotal;
}

add_action( 'woocommerce_cart_product_subtotal', 'art_add_discount_in_subtotal', 10, 4 );

/**
 * Вывод скидки по купону у цены каждого товара
 *
 * @param $price
 * @param $product
 *
 * @return string
 */
function art_add_discount_in_price( $price, $product ) {

	$coupons       = WC()->cart->get_coupons();
	$coupon_amount = 0;

	foreach ( $coupons as $code => $coupon ) {
		if ( 'percent' === $coupon->get_discount_type() ) {
			$coupon_amount += (int) $coupon->get_amount();
		}
	}

	if ( $coupon_amount ) {
		$price        = $product->get_price();
		$price_coupon = $price - $price * $coupon_amount / 100;

		return wc_format_sale_price( $price, $price_coupon ) . $product->get_price_suffix();
	}

	return $price;
}

add_action( 'woocommerce_cart_product_price', 'art_add_discount_in_price', 10, 2 );