// 登錄統(tǒng)一驗證
public function beforeAction( $action ){
//  驗證是否登錄
   $is_login = $this->checkLoginStatus();
    if (in_array($action->getUniqueId(), $this->allowAllAction ) ) {
      return true;
    }
// 是否已經(jīng)登錄了 沒有登錄的話 判斷登錄方式
    if(!$is_login) {
//  如果是ajax方式進(jìn)行請求
      if ( \Yii::$app->request->isAjax) {
        $this->renderJSON([], "未登錄,請返回用戶中心", -302);
      } else {
        $this->redirect( UrlService::buildWebUrl("/user/login") );
      }
      return false;
    }
}

class UserController extends BaseWebController

<?php
namespace frontend\controllers;
use Yii;
use yii\web\Controller;
class PublicController extends Controller{
 public function beforeAction($action){
  $cookie = \Yii::$app->request->cookies;
  //取出存入的cookie值 括號里寫自己定義的cookie名字
  $user_cookie = $cookie->get('user_id');
  //判斷是否有cookie
  if(!isset($user_cookie)){
   echo "<script>alert('請先登錄');location.href='?r=login/login'</script>";
  }
  return parent::beforeAction($action);
 }
}

public function beforeAction($action)
{
  if(!parent::beforeAction($action))
  {
   return false;
  }
}