Cached Information

[Logikos]

I was wondering how exacly is the process proformed to cache data. Like here on vBulletin.org. The forum poral seems to be cached information retrived from the database every 10mins?

I was wondering how I can do something simalar to this. Like if I wanted to get the latest 10 threads posted on my forum I could run a SQL query and it gives me the infomation everytime the page is refreshed.

example:

PHP Code:

$gettitles = $db->query_read("
        SELECT title
        FROM " . TABLE_PREFIX . "thread
        WHERE forumid = 1
        ORDER BY dateline
        LIMIT 5
");


while ($thread = $db->fetch_array($gettitles))
{
        echo $thread['title'];
} 


That will get the latest 5 thread titles in forum id 5. How can I cache something like that? Thanks guys!