Normalise SimplePie items to put into a database

gistfile1.php

<?php
require('simplepie.inc');
$feed = new SimplePie('http://example.com/feed/');

foreach($feed->get_items() as $item) {
	$new_item = (object) array(
		'hash'      => $item->get_id(true),
		'timestamp' => $item->get_date('U'),
		'title'     => $item->get_title(),
		'content'   => $item->get_content(),
		'summary'   => $item->get_description(),
		'permalink' => $item->get_permalink(),
		'metadata'  => (object) array(
			'enclosure' => $enclosure
		),
		'author'    => (object) $author,
		'feed'      => $item->get_feed()->get_link()
	);
	$items[] = $new_item;
}

// Save item array to database, where $database is some sort of DB interface
$database->save_items($items);