My RSS feed snippet - help please

<?php
//default parameter values
	//create a variable to hold the output
	$output = '';
	 
	//retrieve file and return as string
	$content = file_get_contents($feed_url);
	 
	//all is good, we parse the feed
	$feedtitle = new SimpleXMLElement($content);
	 
	//iterate over item in the channel and get the title of each item
	 $modx->setPlaceholder("fffeedtitle", $feedtitle->channel->title);
	 $modx->setPlaceholder("fffeedlink", $feetitle->channel->link);
	 $output .= (!isset($tplChunk)) ?  $modx->parseChunk('rssfeedTitletpl', $modx->placeholders, '[+', '+]') : $modx->parseChunk($tplChunk, $modx->placeholders, '[+', '+]');
	//set up a counter to determine how many items to be displayed
	return $output;
?>

<?php
//default parameter values
$limit = (isset($limit)) ? $limit : 10;
$cssChunk = (isset($cssChunk)) ? $cssChunk : 'rssfeedFetcherCSS';
 
//Inject the CSS code into the head section
	$modx->regClientCSS($modx->getChunk($cssChunk));
	 
	if (!function_exists(fetchFeed)) {
	function fetchFeed($feed_url, $limit, $cssChunk, $tplChunk){
	global $modx;
	 
	//create a variable to hold the output
	$output = '';
	 
	//retrieve file and return as string
	$content = file_get_contents($feed_url);
	 
	try {
	//all is good, we parse the feed
	$feeditems = new SimpleXMLElement($content);
	//iterate over item in the channel and get the title of each item
	foreach($feeditems->channel->item as $entry){
	//set up a counter to determine how many items to be displayed
	if ($i < $limit) {
	$modx->setPlaceholder("fftitle", $entry->title);
	 $modx->setPlaceholder("fflink", $entry->link);
	 $output .= (!isset($tplChunk)) ?  $modx->parseChunk('rssfeedFetchertpl', $modx->placeholders, '[+', '+]') : $modx->parseChunk($tplChunk, $modx->placeholders, '[+', '+]');
	 }
	$i++;
	}
	} catch (Exception $e) {
	 //some error occured, we output an error message and a description of the error
	 $output .= 'An error occurred.  The feed ' . $feed_url . ' could not be read: ' . $e->getMessage();
	 }
	return $output;
	}
	}
	//call the function
	return fetchFeed($feed_url, $limit, $cssChunk, $tplChunk);
?>