Structure for storing posts

[keyboard1333]

query once and save (cache) the result.

Save it where. I'm sorry but I don't understand the concept of "caching". Could you try and explain it a bit...

[traq]

"Where" depends on how you handle it. MySQL does some caching internally. Memcache stores data on the server. You might cache dynamically generated html markup in .txt files, or session-specific data in your $_SESSION.

I was going to link to the Wikipedia page, but it seems uncharacteristically akward and helpless.

Basically, a "cache" is just an organized way to save data you plan on using again later, thereby saving time by only retrieving/ preparing it once and using it several (or many) times.

[keyboard1333]

Hmmmmm, thanks for that traq.