display-custom-data.php

<?php

/**
 * Display custom data on cart and checkout page.
 */
add_filter( 'woocommerce_get_item_data', 'get_item_data' , 25, 2 );

function get_item_data ( $other_data, $cart_item ) {

	if ( isset( $cart_item [ 'custom_data' ] ) ) {
		$custom_data  = $cart_item [ 'custom_data' ];
			
		$other_data[] = array( 'name' => 'Name',
					'display'  => $custom_data['customer_name'] );
		$other_data[] = array( 'name' => 'Message',
				       'display'  => $custom_data['customer_message'] );
	}
	
	return $other_data;
}