在firefox中,使用基于cookie的if statment重定向时使用header('location:')会产生奇怪的错误

例如,我试图将我的访客重新引导到 http://localhost/site/test.php?lang=en_US

if (isset($_COOKIE['country'])) 
{
        $country = $_COOKIE['country'];
        header('Location: test.php?lang=en_US');  

        if ($country == "NO"){              
        header('Location: test.php?lang=no_NO');    
        }                       
}
else
{
    header('Location: test.php?lang=en_US');  
}

但我在firefox中发现了一个奇怪的错误: The page isn't redirecting properly

找到了解决方案:

if (!isset($_GET['lang']))
{

        if (isset($_COOKIE['country'])) 
        {
                $country = $_COOKIE['country'];
                $redirect = "en_US";

                if ($country == "NO"){              
                $redirect = "no_NO";    
                header('Location: crime.php?lang='.$redirect); 
                }   

                if ($country == "EN"){              
                $redirect = "en_US";    
                header('Location: crime.php?lang='.$redirect); 
                }   

        }
        else
        {
            header('Location: crime.php?lang=en_US'); 
        }


}