Site2Extension.php

<?php
namespace UserFrosting\Sprinkle\Site2\Twig;

use Interop\Container\ContainerInterface;



class Site2Extension extends \Twig_Extension
{

    
    protected $services;

    /**
     * Constructor.
     *
     * @param ContainerInterface $services The global container object, which holds all your services.
     */
    public function __construct(ContainerInterface $services)
    {
        $this->services = $services;
    }

    /**
     * Get the name of this extension.
     *
     * @return string
     */
    public function getName()
    {
        return 'userfrosting/Site2';
    }

    /**
     * Adds Twig global variables `twigVar`.
     *
     * @return array[mixed]
     */
    public function getGlobals()
    {
        $yourVar = [
            'myfields' => 'test'
        ];

        return $yourVar;
    }
}