TWIG Base64 extension for Symfony

Base64.php

<?php

namespace Vendor\Bundle\Twig;

/*
services.yml:
twig.base64:
    class: Vendor\Bundle\Twig\Base64
    tags :
        - { name: twig.extension }
 */


class Base64 extends \Twig_Extension {

    public function getFilters(){
        return array(
            new \Twig_SimpleFilter('base64_encode', 'base64_encode'),
            new \Twig_SimpleFilter('base64_decode', 'base64_decode')
        );
    }

    public function getName(){
        return "base64";
    }
}

With more recents versions of Twig:

<?php

namespace Vendor\Bundle\Twig;

use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;

class Base64 extends AbstractExtension
{
    public function getFilters()
    {
        return [
            new TwigFilter('base64_encode', 'base64_encode'),
            new TwigFilter('base64_decode', 'base64_decode'),
        ];
    }
}