<slide title="Validating Data">
<list>
    <li> Turn off %register_globals% and rely on %$_GET%, %$_POST%, %$_COOKIE%, and %$_REQUEST%</li>
    <li> Test submitted data for expected syntax:</li>
  </list>
<example><![CDATA[<?php if (is_numeric($_POST['age'])) { ... } ?>]]></example>
<example><![CDATA[<?php if (strlen(trim($_GET['address']))) { ... } ?>]]></example>
</slide>
