title: How to use PHP $_REQUEST
body: <p>When submitting this form, is there any way to catch <code>$_GET['aa']</code> and <code>$_POST['aa']</code>, using only <code>$_REQUEST</code>?</p>
  
  <pre><code>&lt;form action="abc.php?aa=1" method="post"&gt;
      &lt;input type="text" name="aa" value="23" /&gt;
      &lt;input type="submit" value="Submit" name="submit"/&gt;
  &lt;/form&gt;
  </code></pre>