Yii2框架视图(View)操作及Layout的使用方法分析

<?php
namespace app\controllers;
use yii\helpers\Url;
use yii\web\Controller;
class DefaultController extends Controller
{
  public function actionIndex()
  {
//    echo Url::toRoute(['index','id'=>11],true);
//    //http://localhost/yiipro/web/default/index?id=11
//
//    echo Url::base();
//    ///yiipro/web
    // 返回视图
    return $this->render('index');
  }
}

return $this->render('index',['username'=>'张三','age'=>22]);

<p><?php echo \yii\helpers\Html::encode($username); ?></p>
<p><?php echo \yii\helpers\Html::encode($age); ?></p>

yii\base\Application::$layout = 'main'
app\module\admin\Module::$layout = 'main';

public $layout = 'default';