How to use PHP Closure to write a simple template engine

simple_php_template_engine.md

File: index.php

class Article
{
    private $title = "This is an article";
}

class Post
{
    private $title = "This is a post";
}

class Template
{

    function render($context, $tpl)
    {

        $closure = function($tpl)
        {
            ob_start();
            include $tpl;
            return ob_end_flush();
        };

        $closure = $closure->bindTo($context, $context);
        $closure($tpl);

    }

}

$article = new Article();
$post = new Post();
$template = new Template();

$template->render($article, 'tpl.php');
$template->render($post, 'tpl.php');

File: tpl.php

<h1><?php echo $this->title;?></h1>