<? require "proteger.php"; $css_adicional = "css/central.css"; $page = !isset($_GET['page']) || $_GET['page'] == "" ? "central_principal.php" : "{$_GET['page']}.php"; $page = file_exists($page) ? $page : "erro.php"; ?> <section id="central" class="interno block"> <div class="central"> <? include_once $page ?> </div> </section>