The WordPress Codex states the the Post Type Names and Taxonomy Names have a limit to the slug name.
- Register Post Type — max. 20 characters, can not contain
capital letters or spaces - Register Taxonomy — The name of the taxonomy. Name should be in
slug form (must not contain capital letters or spaces) and not more
than 32 characters long (database structure restriction).
However, the WordPress Codex doesn’t state whether or not Post Meta or Terms have a limit to the slug name.
- Add Post Meta — No slug limit?
- Insert Term — No slug limit?
Can this be confirmed? Is there no slug name limit for Post meta or Terms?
The
meta_keyfield for thewp_postmetatable is set asvarchartype entries with a length of 255 characters. Seems pretty lengthy. It’smeta_valuepartner parameter is set aslongtexttype.As for the term length, both name and slug are set as
varcharwith a length of 200 characters each in thewp_termstable.