Twitgoo Media RSS creation

<?php
 
	$search = $_GET["search"];
	$url= curl_init('http://twitgoo.com/api/search/timeline/' .$search. '?type=rss');
	curl_setopt($url, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($url, CURLOPT_HEADER, 0);
	$feed = curl_exec($url);
	$feed = str_replace ('<media>', '<item>',$feed );
	$feed = str_replace ('</media>', '</item>',$feed );
	$feed = str_replace ('<rsp status="ok">', '<channel>',$feed );
	$feed = str_replace ('</rsp>', '</channel>',$feed );
	$rss=simplexml_load_string($feed);
	curl_close($url);
	$mediarss='<rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:flickr="urn:flickr:" >';
  $mediarss .= '<channel>';
  $mediarss .= '<title>Openhanced channel</title>';
  $mediarss .= '<link>http://www.openhanced.com</link>';
  $mediarss .= '<description>Photo's from Twitgoo in Media RSS</description>';
  $mediarss .= '<author>Openhanced</author>';
  $mediarss .= '<language>en-us</language>';
	foreach ($rss->item as $item)
  {
    $mediarss .= '<item>';
    $mediarss .= '<title>' .$item->text. '</title>';
    $mediarss .= '<description>' .$item->text. '</description>';
    $mediarss .= '<media:content url="' .$item->imageurl. '"/>';
    $mediarss .= '<media:thumbnail url="' .$item->thumburl. '"/>';
    $mediarss .= '</item>';
        
  }
  
  $mediarss .= '</channel>';
  $mediarss .= '</rss>';
  echo $mediarss;
	
?>