session，cookie共用，session丢失之有关问题，1周了

$session['userInfo']='用户中心';

query("select authority from setting_user where number='".$number."' and password='".$pass."'");
    $r=$q->fetch_array(MYSQLI_USE_RESULT);
    (int)$authority=$r['authority'];//权限分配
    
    if($q->num_rows>0){
        //分配显示名
        $qShow=$m->query("select * from setting_display where user='".$number."' order by id desc limit 1");
        $rShow=$qShow->fetch_array(MYSQLI_USE_RESULT);{
            $_SESSION['receiving']=$rShow['receiving']?$rShow['receiving']:NULL;
            $_SESSION['po']=$rShow['po']?$rShow['po']:NULL;
                        // 很多session 在这里


            
            if($_POST['remeberMe']){
            setcookie("u",$number,time()+3600);
            setcookie("p",$pass,time()+3600);
            }
        }
        $_SESSION['auth']=$number;

        switch($authority){

            case 1:echo "";$_SESSION['admin']=1;break;
            default:echo "";$_SESSION['admin']=NULL;break;
            }
    }
    else{
            echo ""; 
        }
}
?>