YII behaviors使用

文件 frontend/libs/FilterTest.php

<?php
/**
 * Created by PhpStorm.
 * Date: 2016/5/27
 * Time: 14:16
 */
namespace frontend\libs;
use Yii;
use yii\base\Action;
use yii\base\ActionFilter;

class FilterTest extends ActionFilter{

    //在action以前運行，可用來過濾輸入
    public function beforeAction($action) {
        echo '在調用action前顯示<br/>';
        return TRUE;//若是返回值爲false,則action不會運行
    }

    //在action以後運行，可用來過濾輸出
    public function afterAction($action, $result) {
        return $result.'在調用action後顯示<br/>';//能夠對action輸出的$result進行過濾，retun的內容會直接顯示
    }
}

frontend/controllers/TestbehaviorController.php

<?php
/**
 * Created by PhpStorm.
 * Date: 2016/5/27
 * Time: 14:19
 */
  namespace frontend\controllers;

  use yii\web\controller;

class TestbehaviorController extends Controller{

    public function behaviors(){
        return [
            'test'=>[
              'class'=>'frontend\libs\FilterTest',//調用過濾器
            ],
        ];
    }
    public function actionFilter(){
        return "當前action顯示<br/>";//返回的內容會遞交給過濾器，由afterAction處理
    }
}