Show all Categories A Post Is NOT in

Hi, look for category__not_in on this page:
https://codex.www.ads-software.com/Class_Reference/WP_Query

Hi!

im not sure this will help me.

let my try to explain again:

in single.php i list all categories the post is listed in, i also want to show the categories he is not in, but style them differently.

thanks!

Oh, OK. Funny idea. I guess you would build an array of all categories and then echo out all terms in the ‘all categories’ array that are not found in the ‘post category’ array ( or get_the_category() function ).

See: https://developer.www.ads-software.com/reference/functions/get_the_category/
and
https://developer.www.ads-software.com/reference/functions/get_categories/
and
https://www.w3schools.com/php/func_array_in_array.asp

thank you!