Need help with sapo php script

I'm currently fetching a dynamic link from sapo with a php curl script, I see some sites are doing this but they cache the link for 15 minutes so the script doesn't have to run every time someone plays a video, does anyone know how to do this?

example sites: hentaistream.com and animestigma.com

 

I should save the time you fetched it in a DB, if the time is greater than 15 minutes, save the time again and run the script.

 

Oh that's a good idea, can that be done in a php script? The script I have goes to sapo to fetch a link and takes about 1.5 seconds, would that lag if there's a lot of posts?

 

I don't have any knowledge of sapo i'm sorry, but if it takes 1.5 seconds YES!
In pure php its atleast 1/3 of that speed!

I'm always using simpleHTMLdom to fetch website's, might want to take a look at it: http://simplehtmldom.sourceforge.net/

 

oh I got a caching script but I need a quick change in this code:

<?php
$fp = fopen($cachefile, 'w');
fwrite($fp, ob_get_contents());
fclose($fp);
ob_end_flush();
die();
?>

see it writes to a cache file with a url inside but I need it to use the header function to automatically download from the url like this:
header("Location: $url here");