example/views/layouts/main.php
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title><?=$this->e($title, ['ucfirst', 'replace' => ['oo', 'ooo']])?></title>
</head>
<body>
<header>
Tooolooop example page
</header>
<main>
<?=$this->block()?>
</main>
<?=$this->load('partials/sidebar', ['sidebarMessage' => '<Escaped sidebar content>'])?>
<?=$this->block('footer')?>
</body>
</html>