How can i add a tag to all posts automatically?

well, you could do a bulk edit of the posts and add the tags, tho that isnt automatic.

you could write a simple function in your functions.php to add the tags to the post on save_post if they don’t already exist.

Thanks,

Do you have an idea how to write this function?

let me work on it.

try this: https://csstyle.pastebin.com/B346xt8H. let me know if it works. it will add tags automatically on post publish/save if the tag doesn’t already exist.

Thanks, I tried to add it to single.php

it didnt work

I’ll ask in the theme forum – elegant themes

Thanks again.

its a function, it goes in functions.php