How to check if a slug exists?

Question

I have a arbitrary string and want to check if a post with that slug string exists in the site. I tried to find a way to list all slugs, but can't find such a thing. Thanks

Answer 1

Do you mean post slug? You can try to make use of wp_unique_post_slug() that WP uses to generate those. If I remember right if slug you are trying to use is not unique it will be returned with numerical index appended.