lấy tin rss của trang khác

<?php
$xmls=simplexml_load_file("http://vnexpress.net/rss/gl/trang-chu.rss");
//echo count($xmls->channel->item);//-->so mau tin moi
$somautin=count($xmls->channel->item);
for($i=1;$i<=$somautin;$i++)
{
$tui=$i-1;
$tieude=$xmls->channel->item[$tui]->title;
$link=$xmls->channel->item[$tui]->link;
$dates=$xmls->channel->item[$tui]->pubDate;

 echo "<a href=\"$link\" >$tieude</a>$dates <br>";

}