Twig Template Class

<?php
/*

$template = new template(array(
    'all_head.twig', 'page.twig', 'all_foot.twig'),
    'template/', '/tmp');
$template->addJS('script.js');      # Also Takes arrays();
$template->addCSS('style.css');     # Also Takes arrays();
$template->title = 'Test Template and Twig';
echo $template;

all_head.twig
...
    <title>{{ title }}</title>

    <!-- Start JS -->
{% for js in javascript %}
    <script type="text/javascipt" src="{{ js }}"></script>
{% endof %}
    <!-- End JS -->
...


*/

class template {

    var $rendered = false;
    var $twig = null;
    var $pages = array();
    var $data = array();

    function __construct($pages, $path, $cache=false) {

        // Save the pages
        if (!is_array($pages))  $pages = array($pages);
        $this->pages = $pages;

        // Check that the pages are real
        foreach ($this->pages as $page) {
            if (!is_file($path.'/'.$page)) {
                die("Template file <em>$page</em> not found");
            }
        }

        // Load Twig
        require_once "Twig/lib/Twig/Autoloader.php";
        Twig_Autoloader::register();

        $twigLoader = new Twig_Loader_Filesystem($path);
        $this->twig = new Twig_Environment($twigLoader, array(
            'cache' =>  $cache,
        ));

        // Set up data
        $this->data = array(
            'javascript' => array(),
            'css' => array(),
        );

    }

    function render($return=false) {
        if (!$this->rendered) {
            if ($return) {
                $ret = '';
                foreach ($this->pages as $page) {
                    $ret .= $this->twig->render($page,  $this->data);
                }
            } else {
                $ret = true;
                foreach ($this->pages as $page) {
                    echo $this->twig->render($page, $this->data);
                }
            }


            $this->rendered = true;
            return $ret;
        } else {
            return false;
        }
    }

    function __toString() {
        return $this->render(true);
    }

    function addJavascript($path) {
        if (is_array($path)) {
            $this->data['javascript'] = array_merge($this->data['javascript'], $path);
        } else {
            $this->data['javascript'][] = $path;
        }
    }

    function addJS($path) {
        $this->addJavascript($path);
    }

    function addCSS($path) {
        if (is_array($path)) {
            $this->data['css'] = array_merge($this->data['css'], $path);
        } else {
            $this->data['css'][] = $path;
        }
    }

    function __set($key, $val) {
        $this->data[$key] = $val;
    }

    function __get($key) {
        echo "get $key";
        return $this->data[$key] = $val;
    }
}