<code lang="PHP">function reverse_register_globals()
{
	if (ini_get('register_globals') OR strtolower(ini_get('register_globals')) == 'on')
	{
		$supers = array('_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_SESSION', '_ENV', '_FILES');

		if (!isset($_SESSION) OR !is_array($_SESSION))
		{
			$_SESSION = array();
		}

		foreach ($supers AS $arrayname)
		{
			foreach (array_keys($GLOBALS["$arrayname"]) AS $varname)
			{
				if (!in_array($varname, $supers))
				{
					$GLOBALS["$varname"] = NULL;
					unset($GLOBALS["$varname"]);
				}
			}
		}
	}
}</code>