Proces the first request serverside

Hi,

Because of SEO we want to process the first request ourselves so when a user requests a page the first page (including possible filters) is already loaded in the DOM.

Since I’m probably not the first to ask, how do I get started with this and are there existing solutions? I would like to use the PHP API. And if there isn’t an existing solution, what is the best way to parse and convert a uri query like ‘?q=&hPP=10&idx=banden&p=0&dFR%5Bbeschrijving%5D%5B0%5D=B250&dFR%5BmerkFull%5D%5B0%5D=Bridgestone&fR%5BisZomerband%5D%5B0%5D=1&fR%5Bmaat%5D%5B0%5D=185%20%2F%2065%20R15&seizoen=zomerbanden&is_v=1’ to a PHP API request?

Thanks in advance!