[Explosm feed] A feed generator for Cyanide & Happiness which includes the images #comics

cyanide_happiness.php

<?php

/**
 * Generates a Cyanide & Happiness feed with the images included
 * Caches the results to be nice to the server
 * Requires memcache and simplehtmldom
 * Gist: https://gist.github.com/ec1a3af05246e08be951
 */

// See http://simplehtmldom.sourceforge.net/
require_once('simple_html_dom.php');

$mem = new Memcache;
$mem->addServer('localhost');

$feed = "http://feeds.feedburner.com/Explosm";

$feed_src = $mem->get($feed);
if (empty($feed_src)) {
    $feed_src = file_get_contents($feed);
    $mem->set($feed, $feed_src, 0, 43200);
}

$xml = new simplexmlelement($feed_src);
header("Content-type: application/rss+xml");

foreach($xml->channel->item as $item) {

    $url = $item->link;
    $html = file_get_html($url);

    $img_tag = $mem->get($url . '[img]');
    if (empty($img_tag)) {
        $img_tag = $html->find('#main-comic')[0]->outertext;
        $mem->set($url . '[img]', $img_tag);
    }

    $item->description = $img_tag;

}

echo $xml->asxml();