if($_GET['lang'] == 'en')
{
    header('Location:EN/index.php');
    exit;
}
elseif ($_GET['lang']== 'ger')
{
    header('Location:GER/index.php');
    exit;
}
elseif ($_GET['lang']== 'tr') 
{
    header('Location:TR/index.php');
    exit;
}