Connessione ai feed rss dei siti esterni

<?php
 
$url="http://feeds.feedburner.com/Tuxfeedit?format=xml";
 
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$conn = curl_exec($ch);
 
if($conn==false){
 echo("impossibile connettersi");
}