- %1$s is private and should not be used in themes or plugins directly.
- _usort_terms_by_id is deprecated since version 4.7.0!
_usort_terms_by_id ( $a, $b )
- Introduced in WordPress: 2.3.0
- Deprecated in WordPress: 4.7.0
Sort categories by ID.
Used by usort() as a callback, should not be used directly. Can actually be
used to sort any term object.