Something

			<?				$page = $_GET['area']; 												if ($page != "") 								{$contentfile = $page.".php";								if (				file_exists($contentfile)				) 								{				include								($contentfile);				} 								else   {				echo "There was an error finding this page. Contact the webmaster.";				}								} else {				include("mainpage.php");				}							?>