<?php
class easyRSS
{

function parse($feed, $datetype="")
{ // Parses the RSS feed into the array
	$arr = array();
	// Determine encoding
	preg_match('/<\?xml version="1\.0" encoding="(.*)"\?>/i', $feed, $sarr);
	$arr["encoding"] = $sarr[1];
	// Determine title
	preg_match('/<title>(.*)<\/title>/i', $feed, $sarr);
	$arr["title"] = $sarr[1];
	// Determine stylesheet
	preg_match('/<?xml-stylesheet.*href="(.*)".*?>/i', $feed, $sarr);
	$arr["stylesheet"] = $sarr[1];
	// Determine description
	preg_match('/<description>(.*)<\/description>/i', $feed, $sarr);
	$arr["description"] = $sarr[1];
	// Determine link
	preg_match('/<link>(.*)<\/link>/i', $feed, $sarr);
	$arr["link"] = $sarr[1];
	// Determine language
	preg_match('/<language>(.*)<\/language>/i', $feed, $sarr);
	$arr["language"] = $sarr[1];
	// Determine generator
	preg_match('/<generator>(.*)<\/generator>/i', $feed, $sarr);
	$arr["generator"] = $sarr[1];
	// Strip items
	$parts = explode("<item>", $feed);
	foreach($parts as $part)
	{
		$item = substr($part, 0, strpos($part, "</item>"));
		if(!empty($item))
			$items[] = $item;
	}
	// Fill the channel array
	$arr["items"] = array();
	foreach($items as $item)
	{
		// Determine title
		preg_match('/<title>(.*)<\/title>/i', $item, $title);
		// Determine pubdate
		preg_match('/<pubDate>(.*)<\/pubDate>/i', $item, $pubdate);
		$date = strtotime($pubdate[1]);
		if(!empty($datetype))
			$date = date($datetype, $date);
		// Determine link
		preg_match('/<link>(.*)<\/link>/i', $item, $link);
		// Determine description
		if(stristr($item, '<![CDATA['))
			preg_match('/<description><!\[CDATA\[(.*)\]\]><\/description>/is', $item, $description);
		else
			preg_match('/<description>(.*)<\/description>/is', $item, $description);
		$arr["items"][] = array("title"=>$title[1], "pubDate"=>$date, "link"=>$link[1], "description"=>$description[1]);
	}
	return $arr;
}

function rss($input)
{ // Builds the XML RSS schema using the array
	$input["encoding"] = (empty($input["encoding"]))?"UTF-8":stripslashes($input["encoding"]);
	$input["language"] = (empty($input["language"]))?"en-us":stripslashes($input["language"]);
	$input["generator"] = (empty($input["generator"]))?"EasyRSS":stripslashes($input["generator"]);
	$input["title"] = stripslashes($input["title"]);
	$input["description"] = stripslashes($input["description"]);
	$input["link"] = stripslashes($input["link"]);
	$rss = '<?xml version="1.0" encoding="'.$input["encoding"].'"?>';
    $rss .= (!empty($input["stylesheet"]))?"\n".'<?xml-stylesheet type="text/xsl" href="'.stripslashes($input["stylesheet"]).'"?>':"";
	$rss .= <<<__RSS__

<rss version="2.0">
<channel>
<title>{$input["title"]}</title>
<description>{$input["description"]}</description>
<link>{$input["link"]}</link>
<language>{$input["language"]}</language>
<generator>{$input["generator"]}</generator>

__RSS__;
    foreach($input["items"] as $item)
    {
        $data = date("r", stripslashes($item["pubDate"]));
        $rss .= "\n<item>\n<title>".stripslashes($item["title"])."</title>";
        $rss .= "\n<description><![CDATA[".stripslashes($item["description"])."]]></description>";
        if (!empty($item["pubDate"]))
            $rss .= "\n<pubDate>".date("r", stripslashes($item["pubDate"]))."</pubDate>";
        if (!empty($item["link"]))
            $rss .= "\n<link>".stripslashes($item["link"])."</link>";
        $rss .= "\n</item>\n";
    }
    $rss .= "\n</channel>\n</rss>";
	return $rss;
}

}
?>