Cache

bottom-cache.php

<?php
// Cache the contents to a file
$cached = fopen($cachefile, 'w');
fwrite($cached, ob_get_contents());
fclose($cached);
ob_end_flush(); // Send the output to the browser

index.php

<?php

include('top-cache.php'); 

// Your regular PHP code goes here

include('bottom-cache.php');

top-cache.php

<?php
$file = $parsed_url['path'];
$cachefile = 'cached-'.$file.'.html';
$cachetime = 18000;

// Serve from the cache if it is younger than $cachetime
if (file_exists($cachefile) && time() - $cachetime < filemtime($cachefile)) {
    echo "<!-- Cached copy, generated ".date('H:i', filemtime($cachefile))." -->\n";
    include($cachefile);
    exit;
}

ob_start(); // Start the output buffer