Display total cart shipping volume value in Woocommerce

I use woocommerce for wholesale customers who order containers of furniture - normally 40 foot containers with a volume of 68 cubic meters.

Is there a way I can show somewhere on the website - maybe in the header area a box with showing the total m3 of products in their basket? I need to show the client when they reach 68m3 so they know they have filled a container.

And is there a way to flash up a message if a client tries to submit an order less than 68m3 indicating to them that they still have room left in their container?

Solution

You can try something like this:

<?php
    global $woocommerce;
    $items = $woocommerce->cart->get_cart();
    $cart_prods_m3 = array();

        //LOOP ALL THE PRODUCTS IN THE CART
        foreach($items as $item => $values) { 
            $_product =  wc_get_product( $values['data']->get_id());
            //GET GET PRODUCT M3 
            $prod_m3 = $_product->get_length() * 
                       $_product->get_width() * 
                       $_product->get_height();
            //MULTIPLY BY THE CART ITEM QUANTITY
            //DIVIDE BY 1000000 (ONE MILLION) IF ENTERING THE SIZE IN CENTIMETERS
            $prod_m3 = ($prod_m3 * $values['quantity']) / 1000000;
            //PUSH RESULT TO ARRAY
            array_push($cart_prods_m3, $prod_m3);
        } 

    echo "Total of M3 in the cart: " . array_sum($cart_prods_m3);
?>

See WC() docs: https://docs.woocommerce.com/document/class-reference/