Turn Steam screenshots into RSS feed

get-steam-screenshots.php

<?php
header("Content-Type: application/rss+xml; charset=utf-8");

error_reporting(E_ALL);
ini_set("display_errors", 0);

define('STEAM_USER', $_GET['u']);
define('LIST_URL', "http://steamcommunity.com/id/".STEAM_USER."/screenshots/?appid=0&sort=newestfirst&browsefilter=myfiles&view=grid");

include('extlib/ganon/ganon.php');

$html = file_get_dom(LIST_URL);

$rssfeed = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
$rssfeed .= '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/">' . "\n";
$rssfeed .= '<channel>' . "\n";
$rssfeed .= '   <atom:link href="http://richardbenson.co.uk/steam/get-screenshot-feed.php?u='.STEAM_USER.'" rel="self" type="application/rss+xml" />' . "\n";
$rssfeed .= '    <title>Screenshots for '.STEAM_USER.'</title>' . "\n";
$rssfeed .= '    <link>http://steamcommunity.com/id/'.STEAM_USER.'/screenshots/</link>' . "\n";
$rssfeed .= '    <description>Showing screenshots from '.STEAM_USER.'</description>' . "\n";
$rssfeed .= '    <language>en-us</language>' . "\n";
$rssfeed .= '    <copyright>Feed copyright '.STEAM_USER.', images copyright their respective owners</copyright>' . "\n";
//$rssfeed .= '<atom:link href="'.$_SERVER['REQUEST_URI'].'" rel="self" type="application/rss+xml" />';

foreach($html('.profile_media_item') as $element) {
    $nodes = $element('.imgWallHoverDescription q');
    if (count($nodes)>0) $title = $nodes[0]->getInnerText();
    else $title = "(untitled)";

    $nodes = $element('img');
    if (count($nodes)>0) $thumb = $nodes[0]->src;
    else $thumb = "";

    $nodes = $element('div.imgWallItem');
    $nodeID = $nodes[0]->id;
    $itemID = str_replace('imgWallItem_','',$nodeID);
    $link = "http://steamcommunity.com/sharedfiles/filedetails/?id=" . $itemID;

    $fullSize = "";

    $thumbArray = explode("?", $thumb);
    parse_str($thumbArray[1], $thumbQSArray);
    $thumbEncoded = $thumbArray[0] . "?" . http_build_query($thumbQSArray);

    $rssfeed .= '    <item>' . "\n";
    $rssfeed .= '        <title><![CDATA[' . ($title) . ']]></title>' . "\n";
    $rssfeed .= '        <description><![CDATA[' . $thumb . ']]></description>' . "\n";
    $rssfeed .= '        <link>' . $link . '</link>' . "\n";
    $rssfeed .= '        <guid>' . $link . '</guid>' . "\n";
    //$rssfeed .= '<pubDate>' . date("D, d M Y H:i:s O", $shot_info["timecreated"]) . '</pubDate>';
    $rssfeed .= '        <media:thumbnail url="' . $thumbEncoded . '" />' . "\n";
    //$rssfeed .= '<image><url>' . $thumb . '</url></image>';
    $rssfeed .= '    </item>' . "\n";

}

$rssfeed .= '</channel>' . "\n";
$rssfeed .= '</rss>';

echo $rssfeed;

?>

You should sanitize line 7. Never trust data that is coming in.