<?php
require_once('../simplepie.inc');

$file = new SimplePie_File('http://simplepie.org/');
//$file = new SimplePie_File('http://simplepie.org/blog/feed/');

$test = new SimplePie_Locator($file);
$is_feed = $test->is_feed($file);

if ($is_feed) {
    echo "true";
}
else {
    echo "false";
}
?>