title: mysql_real_escape_string() for entire $_REQUEST array, or need to loop through it?
body: <p>Is there an easier way of safely extracting submitted variables other than the following?    </p>
  
  <pre><code>if(isset($_REQUEST['kkld'])) $kkld=mysql_real_escape_string($_REQUEST['kkld']);
  if(isset($_REQUEST['info'])) $info=mysql_real_escape_string($_REQUEST['info']);
  if(isset($_REQUEST['freq'])) $freq=mysql_real_escape_string($_REQUEST['freq']);
  </code></pre>
  
  <p>(And: would you use <code>isset()</code> in this context?)</p>