Quick plugin to show items that are in WooCommerce cart.

cart.php

<?php
/**
 * Plugin Name: Show Cart
 * Plugin URI:  https://growdevelopment.com
 * Description: Show the cart contents
 * Version:     1.0.0
 * Author:      Grow Development
 */



function growdev_cart(){

	?><style>
		.growdev-cart-box{
			width: 500px;
			height: 80px;
			position: absolute;
			bottom:10px;
			right: 10px;
			background: grey;
			z-index: 99999;
		}
	</style>
			<div class="growdev-cart-box">
				<p>
				<?php
				$cookie = WC()->session->get_session_cookie();
				echo "WC Cookie: " . $cookie[0] . '</br>';
				echo "popup_product_added_cart_key: " . WC()->session->get('popup_product_added_cart_key' );
				?>
				</p>
					<ol>
					<?php
					foreach ( WC()->cart->cart_contents as $cart_item_key => $cart_item ) {
						echo "<li>(" . $cart_item_key . "): " . $cart_item['data']->get_name() . "</li>";
					}
					?>
					</ol>
			</div>
<?php
}
add_action('wp_footer', 'growdev_cart', 50);