How to Decode JSON Data in Twig Templates?

Decoding JSON Data in Twig: A Step-by-Step Guide

Decoding JSON data in Twig templates can enhance the flexibility of your applications by allowing you to access and manipulate structured data efficiently.

To decode JSON data in Twig, you can leverage a custom Twig extension. Here's a step-by-step guide:

1. Create a Twig Extension Class:

namespace Acme\DemoBundle\Twig\Extension;

use Symfony\Component\DependencyInjection\ContainerInterface;  
use \Twig_Extension;

class VarsExtension extends Twig_Extension
{
    protected $container;
 
    public function __construct(ContainerInterface $container) 
    {
        $this->container = $container;
    }
      
    public function getName() 
    {
        return 'some.extension';
    }
    
    public function getFilters() {
        return array(
            'json_decode'   => new \Twig_Filter_Method($this, 'jsonDecode'),
        );
    }

    public function jsonDecode($str) {
        return json_decode($str);
    }
}

2. Register the Extension Service:

In your Services.xml file, register the Twig extension service:

<service>

3. Decode JSON Data in Twig:

Now, you can decode JSON data in your Twig templates using the 'json_decode' filter:

{% set obj = form_label(category) | json_decode %}

By following these steps, you can easily decode JSON data in Twig templates, giving you greater flexibility and control over your data handling.

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