Yii框架中如何引入CSS和JS文件？

<?php

use yii\helpers\Html;

use app\assets\AppAsset;

use yii\widgets\ActiveForm;

use yii\captcha\Captcha;



/* @var $this \yii\web\View */

/* @var $content string */

AppAsset::register($this);



// here

$this->registerJsFile("@web/assets/1b5abb4b/jquery-1.js");  

$this->registerCssFile('penghui.css');

?>