<?php
namespace common\components;
 
use yii\web\Response;
 
class CaptchaAction extends \yii\captcha\CaptchaAction
{

 
    /**
     * 默认验证码刷新页面不会自动刷新
     */
    public function run()
    {
        ob_clean();
        $this->setHttpHeaders();
        \Yii::$app->response->format = Response::FORMAT_RAW;
        return $this->renderImage($this->getVerifyCode(true));
    }
 
}