woocommerce cart custom thumbnail image image in cart

I want to show custom thumbnail images in cart. I made product with a custom attribute, say imageurl.

I used the hook below to make it work:

function custom_new_product_image($cart_object) {
    $a = '<img src="imageurlhere" />';
    return $a;
}

add_filter( 'woocommerce_cart_item_thumbnail', 'custom_new_product_image' );

My code works well if I put a static url in place of "imageurlhere" but I want to pass a custom product attribute image url.

I am able to get the image url with

$cart_object->cart_contents['wccpf_imageurl']

How do I use a custom product attribute image url in place of a static one?

Answer

function custom_new_product_image( $_product_img, $cart_item, $cart_item_key ) {
    $a      =   '<img src="'.$cart_item['wccpf_width'].'" />';
    return $a;
}

add_filter( 'woocommerce_cart_item_thumbnail', 'custom_new_product_image', 10, 3 );