Add single product price for variable boxed products in the cart and checkout

change-boxed-products-price-in-cart-and-checkout.php

<?php
/**
 * prerequisites:
 * You must define products as variables. One variation for single purchase and one variation for box purchase.
 *
 * You can change the name of the box purchase attribute in the code below. (the 'box-capacity' variable).
 * For each variation, you set one equal to the number 1 for the other variation equal to the number in each box.
 *
 * Copy the following code into the functions.php file of the theme/child theme.
 */


/**
 * Check product is/n't boxed
 *
 * @param $product
 *
 * @return bool
 */
function ywp_check_product_is_boxed_type( $product ) {
	$box_capacity_attr = 'box-capacity';

	return (int) $product->get_attribute( $box_capacity_attr ) > 1;
}

/**
 * Calculate individual product of boxed products
 *
 * @param $product
 * @param $price
 * @param $quantity
 *
 * @return mixed|string
 */
function ywp_calc_single_price_of_boxed( $product, $price, $quantity = 1 ) {
	$box_capacity_attr = 'box-capacity';
	$box_capacity      = (int) $product->get_attribute( $box_capacity_attr );
	$cleaned_price     = preg_replace( '/\D+/', '', $price );

	return 2 < $box_capacity ? $product_price : wc_price( ( $cleaned_price / $quantity ) / $box_capacity );
}

/**
 * Change product item price text in cart and checkout
 *
 * @param $product_price
 * @param $product
 *
 * @return mixed|string
 */
function ywp_add_unit_price_to_cart_item_price( $product_price, $product ) {
	$is_boxed = ywp_check_product_is_boxed_type( $product );

	if ( ! $is_boxed ) {
		return $product_price;
	}

	$single_price = ywp_calc_single_price_of_boxed( $product, $product_price );

	return sprintf(
		'%s<span class="signle-price-of-boxed">قیمت هر عدد: $s</span>',
		$product_price,
		$single_price,
	);
}

add_filter( 'woocommerce_cart_product_price', 'ywp_add_unit_price_to_cart_item_price', 10, 2 );

/**
 * Change product subtotal text in cart and checkout
 *
 * @param $product_subtotal
 * @param $product
 * @param $quantity
 * @param $cart
 *
 * @return mixed|string
 */
function ywp_add_unit_price_to_cart_item_subtotal( $product_subtotal, $product, $quantity, $cart ) {
	$is_boxed = ywp_check_product_is_boxed_type( $product );

	if ( ! $is_boxed ) {
		return $product_subtotal;
	}

	$single_price = ywp_calc_single_price_of_boxed( $product, $product_subtotal, $quantity );

	return sprintf(
		'%s<span class="signle-price-of-boxed">قیمت هر عدد: $s</span>',
		$product_subtotal,
		$single_price,
	);
}

add_filter( 'woocommerce_cart_product_subtotal', 'ywp_add_unit_price_to_cart_item_subtotal', 10, 4 );