视图文件: `about.php`和`index1.php` index1.php代码 ***** ``` <h1>this is index1</h1> <?php echo $this->render('about',[ 'v_hello_str'=>'hello_world' ]); ?> ``` ***** about.php代码 ``` <h1>this is about</h1> <h1><?=$v_hello_str; ?></h1> ```