php中登录后跳转回原来要访问的页面实例_PHP教程

$url = $_SERVER['HTTP_REFERER'];
header("location:$url");

protected function checkLogin() {
       if (没有登录){          
       $thisurl = "http://".$_SERVER["HTTP_HOST"].$_SERVER['PHP_SELF'];//当前URL
       $thisurl = urlencode($thisurl);//这里要注意需要把获取到的url转码，不然后面不好传递URL
           redirect("http://".$_SERVER["HTTP_HOST"]."/cityosweb/default.php/Index/login?url=".$thisurl);           
       }
   }

$this->checkLogin();

public function login() {
        $url = $_GET['url'];
        $this->assign('url',$url);
        $this->assign('title','Login');
        $this->display('user/reg_new.html');
    }