Interesting, thanks for the links. Could I ask a huge favour? I fiddled with this a bit but I'm not so good with PHP so I was wondering if you could help me with the filter I need? Basically I need to return all posts from the last x days where "x" is the published date specified in days ie 7, 14, 21, 365, etc and is passed via a query argument something like "/print/?post-published-date=365&post-language%5B%5D=English"
Does that make sense? Thanks for considering!