categories

Can you explain that some more?

You could add two categories that use your one category as a Parent Category.

But not sure about the “each category one category must be selected?” ability.

For example I want to have category

Class
– Languages
– Math
– …

and another independent category

School
– High school
– University
– …

author must select one from Class and one form School. Thanks

There is no reason you can’t organize your posts like that but I think you’ll have to write a custom search to get the results you want.

oh… but you aren’t talking about a search are you? You are talking about requiring a post author to select one of each category before the post can be published, yes? That… is harder. I’d have to think about it but I’m pretty sure it means writing a plugin and hooking into the WP post publishing functions.

exactly, post author must select from both at east one before publishing. I dont want to know what that means for search :)))

The search might be the easier part. I don’t think WP will do anything like what you want so you might be looking at having to write a plugin, or having to commission someone to write it for you.

Thanks a lot for help and time apljdi (and MichaelH). Hope i will find some solution or another posibility to do what i want ??

Might use these two plugins to restrict categories users can assign when writing posts:

https://www.ads-software.com/extend/plugins/level2categories-2/
https://www.im-web-gefunden.de/wordpress-plugins/role-manager/
described at https://www.ads-software.com/support/topic/240606 by mtg169