`<?php
namespace backend\controllers;
use yii\web\Controller;
use Yii;
class AdminController extends Controller {

public function beforeAction($action){
	if(!Yii::$app->user->id){
		$this->redirect(['/site/login'])->send();
	}else{
		return true;
	}
}

}
?>`

可以在 beforeAction 里面判断

一般都是在before提前判断是否登录

`<?php
namespace backend\controllers;
use yii\web\Controller;
use Yii;
class AdminController extends Controller {

public function beforeAction($action){
	if(!Yii::$app->user->id){
		$this->redirect(['/site/login'])->send();
	}else{
		return true;
	}
}

}
?>`

`<?php
namespace backend\controllers;
use yii\web\Controller;
use Yii;
class AdminController extends Controller {

public function beforeAction($action){
	if(!Yii::$app->user->id){
		$this->redirect(['/site/login'])->send();
	}else{
		return true;
	}
}

}
?>`

 // //操作命名格式 action操作名
  // $actions = parent::actions();
  // $session = Yii::$app->session;
  // $admin_id=$session->get('admin_id');
  // if($admin_id==null){
  // 	$this->redirect(['/default/zz'])->send();
  // Yii::app()->user->setFlash('commentSubmitted ','zz');
  // $this->redirect('default/zz');
  // } 
public function beforeAction($action){
if(!Yii::$app->user->admin_id){
	$this->redirect(['/default/zz'])->send();
}else{
	return true;
}