I created box meta for a custom post type. From the admin edit for the post, I want to enter in multiple values so that it saves as an array so I can then call it as an array from the front end.
So in my meta box from the admin edit I'd save the values "200", "201", "202" in a single field "_parent_id" and then grab it from the front end
$array = get_post_meta($postID, "_parent_id", false);
How should those values look in the box meta field?