Thanks for the reply. I don’t mind creating a plugin (I’m actually already using one I made for this website) but I still don’t know how to iterate through the posts.
In other words I’m having trouble with step 2:
1. Schedule function X to run at a given interval
2. Within function X, iterate over all posts.
3. Manipulate each post in some way.
Maybe it’s a dumb question. Do I just use get_posts() ?
Edit: I think that’s probably it. In retrospect, dumb question. I’ll try it out and see what happens.