Глобальные переменные, register_globals и особенности Битрикса

<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/header.php");?> 
<? 
   echo $CODE; // вернет Artemy 
?> 
<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/footer.php");?>

function FormDecode() 
{ 
   global $HTTP_ENV_VARS, $HTTP_GET_VARS, $HTTP_POST_VARS, $HTTP_POST_FILES, $HTTP_COOKIE_VARS, $HTTP_SERVER_VARS;

   $superglobals = Array('_GET'=>1, '_SESSION'=>1, '_POST'=>1, '_COOKIE'=>1, '_REQUEST'=>1, '_FILES'=>1, '_SERVER'=>1, 'GLOBALS'=>1, '_ENV'=>1, 'DBSQLServerType'=>1);  

   foreach($superglobals as $gl=>$t) 
   { 
      unset($_REQUEST[$gl]); 
      unset($_GET[$gl]); 
      unset($_POST[$gl]); 
      unset($_COOKIE[$gl]); 
   } 
 
   $register_globals = ini_get_bool("register_globals"); 
   if (!$register_globals) 
   { 
      $HTTP_ENV_VARS = $_ENV; 
      foreach($_ENV as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
 
      $HTTP_GET_VARS = $_GET; 
      foreach($_GET as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
 
      $HTTP_POST_VARS = $_POST; 
      foreach($_POST as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
 
      $HTTP_POST_FILES = $_FILES; 
      foreach($_FILES as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
 
      $HTTP_COOKIE_VARS = $_COOKIE; 
       foreach($_COOKIE as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
 
      $HTTP_SERVER_VARS = $_SERVER; 
      foreach($_SERVER as $key => $val) 
         if(!isset($superglobals[$key])) 
            $GLOBALS[$key] = $val; 
   } 
}

<?// index.php 
// Пример 1. Установка глобальной переменной до функции 
function ShowGlobalValue() 
{ 
   echo $GLOBALS["value"]; 
} 
 
$value = 1; 
ShowGlobalValue(); // покажет 1 
?>

<?// index.php 
// Пример 2. Установка глобальной переменной внутри функции 
function SetGlobalValue() 
{ 
   $GLOBALS["value"] = "1"; 
} 
 
SetGlobalValue(); 
echo $value; // покажет 1 
?>

foreach($_GET as $key => $val) 
   if(!isset($superglobals[$key]))  
      $GLOBALS[$key] = $val;