Probléme de code youtube

<?php
function yt($ytsearch) {

	global $ytcurrenttag;
	global $ytvids;
	global $ytid;
	$ytvids = array();
	$ytid=0;
	
	function ytinsidethetag($ytparser, $ytdata){
		global $ytcurrenttag;
		global $ytvids;
		global $ytid;
		if(!strcmp(strtolower($ytcurrenttag),"title")) {
			$ytvids[$ytid]['type'] = "yt";
			$ytvids[$ytid]['title']=$ytdata;
			$ytvids[$ytid]['title'][0] = ucwords($ytvids[$ytid]['title'][0]);
		}
			
	}
	
	function ytopentag($ytparser, $ytdata, $ytattr=''){
		global $ytcurrenttag;
		$ytcurrenttag = $ytdata;
		global $ytvids;
		global $ytid;
		if(!strcmp(strtolower($ytcurrenttag),"media:player")) {
			$ytvids[$ytid]['link']=str_replace("watch?v=","v/",$ytattr['URL']);
			$ytvids[$ytid]['link']=str_replace("&amp;feature=youtube_gdata","",$ytvids[$ytid]['link']);
			$ytvids[$ytid]['link']=str_replace("&feature=youtube_gdata","",$ytvids[$ytid]['link']);
			$ytvids[$ytid]['thumb']=str_replace("http://www.youtube.com/v/","http://img.youtube.com/vi/",$ytvids[$ytid]['link']);
			$ytvids[$ytid]['thumb'].="/2.jpg";
		}
	}
	
	function ytclosetag($ytparser, $ytdata){
		global $ytid;
		if(!strcmp(strtolower($ytdata),"entry"))
			$ytid++;
	}
	
	$ytxml_parser = xml_parser_create();
	
	xml_set_element_handler($ytxml_parser, "ytopentag", "ytclosetag");
	
	xml_set_character_data_handler($ytxml_parser, "ytinsidethetag");
	
	include_once("fetch.php");
	$ytdata = fetchrss("http://gdata.youtube.com/feeds/videos?vq=$ytsearch&start-index=1&max-results=50");
	if(!(xml_parse($ytxml_parser, $ytdata)))
		die("Error on line " . xml_get_current_line_number($ytxml_parser));
	
	xml_parser_free($ytxml_parser);
	
	return $ytvids;
}
?>