title: why is $_REQUEST empty
body: <p>I have Ubuntu 10.10 with apache2, php 5.3.3-1 and mysql 5.1.</p>
  
  <p>I am passing some values to a page via URL. On that page, if I do <code>print_r($_GET)</code>, then I see the array contents. But if I do <code>print_r($_REQUEST)</code> the array is empty. Any ideas why this could be?</p>