RSS Feed reader - Display RSS feeds from other sites

<?php
// RSSFeed reader by Nimja.com
// Save as "RSSFeed"

//URL to read, can be set in snippet call.
$url = (!empty($url)) ? $url : "http://nimja.com/nimja.rss";

//Words in the 'preview', can be set in snippet call.
$words = (!empty($words)) ? $words : 30;

//Get feed contents (the easy way)
$feed = file_get_contents($url);

//Open a dom object and get all the 'item's
$dom = domxml_open_mem($feed) or die('error');
$root = $dom->document_element();
$items = $root->get_elements_by_tagname('item');

//Loop over the items.
foreach ($items as $item) {
	$title = $item->get_elements_by_tagname('title');
	$desc = $item->get_elements_by_tagname('description');
	$link = $item->get_elements_by_tagname('link');
	$date = $item->get_elements_by_tagname('pubDate');
	
	$time = strtotime($date[0]->get_content());
	
	$text = strip_tags($desc[0]->get_content());
	$words_array = array_slice(split(' ', $text), 0, $words);
	$description = implode(' ', $words_array).'...';
	
	echo '<h2>'.$title[0]->get_content().'<span>'.date('d M Y',$time).'</span></h2>';
	echo $description.'<br />';
	echo '<a href="'.$link[0]->get_content().'">Read More</a><br /><br />';
}
?>

$feed = file_get_contents($url);

$replace = [
	'QM' => '?',
	'AMP' => '&'
];
$url = strtr($url, $replace);