用simpleXML获取php.net的RSS

<?  
$cache="phpnews.xml";  
$rssurl="http://www.php.net/news.rss";  
header("content-type:text/html;charset=utf-8");  
if( file_exists("$cache") )  

{  

$m=filemtime("$cache");  

$n=time();  

if($n-$m>10800)  
{  
$rss=simplexml_load_file("$rssurl");  
$rss->asXML("$cache");  

}  
else  
$rss=simplexml_load_file("$cache");  
  
}  

else  
{  
$rss=simplexml_load_file("$rssurl");  
$rss->asXML("$cache");  

}  

  
foreach($rss->item as $item)  

  
print "<a href=/"$item->link/" target=_blank> $item->title </a><br>/n";  

  

?>