Reported by islp via User Contributed Notes.

Issue Description

The docs lack one scenario:

mixed

1. An array of values if $single is false.
2. The value of meta data field if $single is true.
3. False for an invalid $user_id (non-numeric, zero, or negative value).
4. An empty string if a valid but non-existing user ID is passed.

What if the user ID is ok and the meta field doesn’t exist?

URL of the Page with the Issue

https://developer.wordpress.org/reference/functions/get_user_meta/#return

Section of Page with the issue

Return

Why is this a problem?

Does not include a possible scenario.

Suggested Fix

Adjust the return section to include the described scenario.