Config.php

<?php
class Config {
    public static $paths = [
		'base'   => '/index.php',
		'views'  => 'views/',
		'foo'    => 'bar'
	];
	public static function path($path) {
		return static::$paths[$path];
	}
}

Foo.php

<?php
class Foo extends Config {
    public static function get($result) {
		return $result;
	}
}

index.php

<?php
function __autoload($class) {
	include('./classes/'.$class.'.php');
}

Bob::get('/', function() {
	/**
	 *  just imagine there would be views/head.php, views/blog.php and views/foot.php
	 */
	View::add('head');
	View::add('blog', ['foo' => Foo::get('bar')]);
	View::add('foot');
	
	/**
	 * this route would result in something like this:
	 * 
	 * <?php
	 * include('views/head.php');
	 * $foo = Foo::get('bar'); // => 'bar'
	 * include('views/blog.php');
	 * unset($foo);
	 * include('views/foot.php');
	 * ?>
	 */
});

Bob::go(Config::path('base'));

View.php

<?php
class View extends Config {
    public static function add($view, $data = []) {
		if(!is_array($data))
			$data = ['data' => $data];
		/**
		 * $data['foo'] = 'bar'; => $foo = 'bar';
		 */
		foreach($data as $key => $var)
			${$key} = $var;
		include(Config::path('views').$view.'.php');
	}
}