Downloads and caches content from Google's News RSS feed. This example is for sports.

cache.feed.php

<?php
	$sports = 'https://news.google.com/news/feeds?ned=us&topic=s&output=rss';
	$feedCache = 'feed.xml';
	if(!file_exists($feedCache)):
		fopen($feedCache, 'w');
		$saveSports = file_get_contents($sports);
		$saveSports = file_put_contents($feedCache, $saveSports);
	elseif((time() - filemtime($feedCache)) > 3600):
		$saveSports = file_get_contents($sports);
		$saveSports = file_put_contents($feedCache, $saveSports);
	endif;

	$xml = simplexml_load_file($feedCache);
	foreach($xml->channel->item as $item):
		print '<li><a href="'.$item->link.'" target="_blank">'.$item->title.'</a></li>';
	endforeach;
?>