Save and display order custom meta data in Woocommerce 3+
问题 A while back my partner helped me to add a custom field to our checkout page, we wanted to ask people "How did you hear about us?" when they booked for our events. We put it together but shortly after we stopped being able to see the results properly. In the "New Order" emails sent to the admin, the label 'How did you hear about us' appears, but with no answer. In the order page, it appears in two places: 1) under the Billing info. The label is there. Value is: Array 2) under "Custom Fields"