php解析xml问题---急

Question

<?php
header('Content-type:text/html;charset=utf-8'); $xml = simplexml_load_file('example.xml');
echo "<table border='1'>";
echo "<tr>";
echo "<td>";
echo $xml->entry[0]['title'];
echo "</td>";
echo "<td>";
echo $xml->entry[0];
echo "</td>";
echo "</tr>";
echo "<tr>";
echo "<td>";
echo $xml->entry[1]['title'];
echo "</td>";
echo "<td>";
echo "<ul>";
echo "<li>".$xml->entry[1]->ul->li[0]."</li>";
echo "<li>".$xml->entry[1]->ul->li[1]."</li>";
echo "</ul>";
echo "</td>";
echo "</tr>";
echo "</table>";
?>