Retrieving multiple values to the Post Meta (using an array)
Aha! I think I found your answer. Two facts: The description of the $meta_value argument on add_post_meta() functions’s codex page notes: An array will be serialized into a string. The $single argument’s description on the get_post_meta() function’s codex page notes: If set to true then the function will return a single result, as a string. … Read more