Untitled

<?function startSession(){        if(!session_id())        {                session_start();        }}function isLoggedIn(){        if(isset($_SESSION['name'])) return true;}function setLoginName($name){        $_SESSION['name'] = $name;}function clearLoginName(){        unset($_SESSION['name']);}function getLoginName(){        if(isset($_SESSION['name']))        {                return $_SESSION['name'];        }}function setError($message){        $_SESSION['error'] = $message;}function getError(){        if(isset($_SESSION['error'])) return $_SESSION['error'];        return null;}function clearError(){        unset($_SESSION['error']);}?>