Grabs and sends you the most recent ep of a podcast.

curep.php

<?php
/*
 *  Look for the first podcast episode given an rss feed, then download it.
 *
 *
 *  This is pretty unsafe, as it'll grab any url handed to it.
 *
 *    You can set feed by commenting the first line where it's defined and setting your 
 *    own URL, but that still means that it'll download any file the supplied feed hands
 *    to it.   
 *
 *  There are 3 ways to use file:
 * 			1) Post this on your website, and set FEED below.  It'll grab the most recent
 *             version of the podcast feed you set it to *only.*  This is the "safer" way
 *             to do it.
 *          2) If FEED is not set below, it'll parse any feed handed to it with the "feed"
 *             variable.  Example: "http://my.site/curep.php?feed=http://my.podcast.feed/feed"
 *          3) On the command line: curep.php -f http://my.podcast.feed -o episode.mp3
 *  		   This will grab the most recent ep on the feed and save it to episode.mp3.  
 *             This is by far the safest method.
 *
 */

define("FEED", ''); // Put feed between quotes.

if (!class_exists("DOMDocument")) {
	echo "no dom.  shucks.";
	exit(1);
}

$via_web = false;

if (isset($_SERVER["REQUEST_URI"])) {
	$via_web = true;
	$feed = (FEED == '' ) ? $_REQUEST["feed"] : FEED;
} else {
	$opts = getopt("f:o:");
	$feed = $opts["f"];
}


$dom = new DOMDocument();
$dom->load($feed);

foreach ($dom->getElementsByTagName("item") as $item) {
	$e = $item->getElementsByTagName("enclosure");

	if ($e->length > 0) {
		$mime  = (string) $e->item(0)->getAttribute("type");
		$url   = (string) $e->item(0)->getAttribute("url");
		$fname = basename($url);
		break;
	}


}

if (!isset($url)) {
	echo "no podcasts.";
	exit(2);
}

if ($via_web) {
	header("Content-Type: $mime");
	header("Content-disposition: filename='$fname'");
	echo file_get_contents($url);

} else {
	file_put_contents($opts["o"], file_get_contents($url));
}

// Sam Mulvey, 2016, public domain if it even matters.
?>