Sample Code: Quick and Dirty PHP Cache

Here’s a variation of a PHP caching script. One of the things I frequently find myself doing for page(s) that take a long time to render, especially if they are a long running process, is to generally save a recent cached page (or more specifically) cached content and serving that up, when I need to have an immediate page appear.

Grab this on GitHub: https://github.com/acbrandao/PHP/tree/master/simple_cache

Here ‘s a quick sample:

<?php
$cache_file = 'URI to cache file';
$cache_life = '120'; //caching time, in seconds

$filemtime = @filemtime($cache_file); // returns FALSE if file does not exist @ prevents error display
if (!$filemtime or (time() - $filemtime &gt;= $cache_life)){
ob_start();
resource_consuming_function();
file_put_contents($cache_file,ob_get_flush());
}else{
readfile($cache_file);
}
?>