参考書籍：http://amzn.to/2hR0rdQ

コントローラーの$this->render第二引数に配列で渡すと、Twig側で拾えます。

before

<?php

namespace AppBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;

class ConcertController extends Controller
{
    /**
     * @Route("/page/")
     **/
    public function indexAction()
    {
        return $this->render('Page/index.html.twig');
    }
}

after

<?php

namespace AppBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;

class ConcertController extends Controller
{
    /**
     * @Route("/page/")
     **/
    public function indexAction()
    {
        $information = "add new concert";
        $args = [
            'informations' => [
                '201610' => 'Add new page',
                '201611' => 'Add news page',
                '201612' => 'Delete old page',
            ],
            'title' => 'Example Site'
        ];
        return $this->render(
            'Page/index.html.twig',
            $args
        );
    }
}

Twigで拾う

渡した値は、第二引数のキー名で拾えます。

<html>
<body>
    <h1>{{ title }}</h1>
    <ul>
        {% for key, item in informations %}
            <li>{{ key }}: {{ item }}</li>
        {% endfor %}
    </ul>
</body>
</html>

出力