yii2 session:curd

<?php
namespace frontend\controllers;
use Yii;
class IndexController extends \yii\web\Controller
{
	
	public function actionSite()
	{
		//设置session
		/*Yii::$app->session->set('name',666);
		var_dump($_SESSION);*/
		//修改session
		/*Yii::$app->session['name']="CYG";
		var_dump($_SESSION);*/
		删除session
		/*Yii::$app->session->remove("name");
		var_dump($_SESSION);*/
	}

}