设置session和cookie的类，安全。

 

<?
class h863_global
{
    static function set_global($key,$value)
    {
        if($value=="")
        {
            $_SESSION[$key]=$value;
            unset($_SESSION[$key]);
            setcookie($key,$value,time()-9999,"/");
        }
        else
        {
            session_start();
            $_SESSION[$key]=$value;
            setcookie($key,$value,0,"/");
        }
    }
    static function get_global($key)
    {
        if($_SESSION[$key]!="")
        {
            return $_SESSION[$key];
        }
        if($_COOKIE[$key]!="")
        {
            return $_COOKIE[$key];
        }
        return "";
    }
    static function isnon_global($key)
    {
        if($_SESSION[$key]!="")
        {
            return true;
        }
        if($_COOKIE[$key]!="")
        {
            return true;
        }
        return false;
    }
}
?>