404.php

<?php 
define("NAME", "");
define("TITLE", "");
define("WEB_URL", "");
require_once("template.php");
if (!file_exists("config.php"))
{
  require_once("install.php");
}else{
require_once("config.php");

Template::render_header("Page not found");
?>
  <div class="text-center">
    <h1><?php echo _("Page Not Found");?></h1>
    <p><?php echo _("Sorry, but the page you were trying to view does not exist.");?></p>
  </div>
<?php 
Template::render_footer();
}