ngds/common/components/Controller.php

<?php
/**
 * Created by PhpStorm.
 * User: Leo
 * Date: 2017/9/3
 * Time: 下午3:05
 */

namespace common\components;


use common\helpers\Tool;
use yii\base\ActionEvent;
use yii\helpers\Json;
use yii\helpers\Url;

class Controller extends \yii\web\Controller {

    /**
     * @return array
     */
    public function actions() {
        return [
            'captcha' =>  [
                'class' => 'common\helpers\CaptchaAction',
                'width' => 120,
                'height' => 40,
                'padding' => 0,
                'minLength' => 4,
                'maxLength' => 4,
                'offset'=>8,        //设置字符偏移量 有效果
                'testLimit'=>1,
            ],
        ];
    }

    /**
     * 不允许直接访问ajax页面
     * @param $action
     * @return bool
     * @throws \yii\web\BadRequestHttpException
     */
    protected function checkAjax(&$action){
        $currentAction = $action->id;
        if(strpos($currentAction ,'ajax-')===0){
            if(!\Yii::$app->request->getIsAjax()){
                throw new \yii\web\BadRequestHttpException('无法完成您的请求');
            }
        }
        return true;
    }

}