wp_list_filter() OR operator doesn't work

[kevinB]

wp_list_filter() always returns all elements when the OR operator is passed. This affects corresponding usage of get_post_types(), get_taxonomies(), get_post_stati().

The following call should return only private and public stati, but actually returns all:

$all_stati = get_post_stati( array( 'private' => true, 'public' => true ), 'names', 'OR' );

wp_list_filter() : OR operator was broken

Altered some test cases to catch this: ​http://unit-tests.trac.wordpress.org/changeset/437

Patch as-is seems fine based on the test cases, I'll give it a run in the wild on core's usage of it tomorrow.

In [18711]:

Fix wp_list_filter() OR operator. Props kevinB. Fixes #18092

Core doesn't use the OR functionality by default anywhere that I could find.