Как сделать страницу зависимой

include($_SERVER['DOCUMENT_ROOT'].'/includes/config.inc.php');
include($_SERVER['DOCUMENT_ROOT'].'/includes/database.inc.php');

{$article.content}
	{if $is_admin}
	5 + 10 = {php}$d = 5; $x=10; $c  = $d + $x; echo $c;{/php}
	{else}
	Два+ два = {php}$d = 2; $x=2; $c  = $d + $x; echo $c;{/php}
	{/if}

<?php
if(defined('VALID_CMS')) { die('ACCESS DENIED'); }
$LangArray = array("RUS", "AZE", "ENG");
$DefaultLang = "RUS";
if(@$_SESSION['NowLang']) {
if(!in_array($_SESSION['NowLang'], $LangArray)) {
$_SESSION['NowLang'] = $DefaultLang;}}
else {$_SESSION['NowLang'] = $DefaultLang;}
$language = addslashes($_GET['lang']);
if($language) {if(!in_array($language, $LangArray)) {
$_SESSION['NowLang'] = $DefaultLang;}
else {$_SESSION['NowLang'] = $language;}}
$CurentLang = addslashes($_SESSION['NowLang']);
include_once ($_SERVER['DOCUMENT_ROOT']."/system/langs/".$CurentLang.".php");
?>

 header('Content-Type: text/html; charset=utf-8');
define('PATH', $_SERVER['DOCUMENT_ROOT']);
define("VALID_CMS", 1);
session_start();
include($_SERVER['DOCUMENT_ROOT'].'/includes/config.inc.php');
include($_SERVER['DOCUMENT_ROOT'].'/includes/dbimport.inc.php');
include($_SERVER['DOCUMENT_ROOT'].'/core/cms.php');