Twig filter that converts a JSON string to object

JsonDecodeExtension.php

<?php

/*
 * Installation:
 * =============
 * # services.yml
 * services:
 *     # ...
 *     acme.twig.json_decode:
 *         class: Acme\AcmeBundle\Twig\JsonDecodeExtension
 *         tags:
 *           - { name: twig.extension }
 * Usage:
 * ======
 * {% set customerProperties = entity.properties | jsonDecode %}
 * 
 * {{ customerProperties.firstName }}
 */

namespace Acme\AcmeBundle\Twig;

class JsonDecodeExtension extends \Twig_Extension
{
    public function getFilters()
    {
        return array(
            "jsonDecode" => new \Twig_Filter_Method($this, "jsonDecode")
        );
    }

    public function jsonDecode($string)
    {
        return \json_decode($string);
    }
    
    public function getName()
    {
        return "jsonDecode.extension";
    }
}