PHP生成XML文档

<?php
   $channel = array('title' => "What's For Dinner",
      'link' => 'http://menu.example.com/',
      'description' => 'Choose what to eat tonight.');

   print "<channel>\n";

   foreach ($channel as $element => $content) {
      print " <$element>";
      print htmlentities($content);
      print "</$element>\n";
   }

   print "</channel>";
?>