/**
* Renders cached page.
*
* @param string $template The dynamic page to cache.
* @param integer $uid The user ID (security precaution to prevent collisions).
* @param array $vars Set of variables passed to dynamic page.
*/
function cache_page($template, $uid, $vars)
{
$cache = 'cache/' . $uid . '-' . md5(@json_encode($vars)) . '.cache';
if (!file_exists($cache)) { // <- also maybe check creation time?
// set up template variables
extract($template_vars, EXTR_SKIP);
// start output buffering and render page
ob_start();
include $template;
// end output buffering and save data to cache file
file_put_contents($cache, ob_get_clean());
}
readfile($cache);
}