Custom function to display all values of a custom field (meta_key)

[mireillesan]

If possible, add an extra function where we can list all values of a certain custom field (meta_key).

All functions I've found so far is only post id related (e.g get_post_custom_values, etc).

While any developer can build this themselves, I do think other wp users could benefit from it as well if it's simly part of the core.

Thanks.

[mireillesan]

To extend the function, also add a parameter that the results can be limited to posttypes and/or taxonomies.