How to create a function in twig to calculate the age of a person using Symfony

I have this PHP code that works but I would like to be able to use the same but within twig in symfony.

<?php
    $cumpleanos = new DateTime("1982-06-03");
    $hoy = new DateTime();
    $annos = $hoy->diff($cumpleanos);
    echo $annos->y;

Answer

To make this code guide me in this post: https://es.stackoverflow.com/a/73288/6524

The only variant in the file EdadUsuarioExtension.php

<?php

namespace AppBundleTwig;

//Extension muestra la edad del usuario
class EdadUsuarioExtension extends Twig_Extension
{
    public function getFunctions()
    {
        return array(
            new Twig_SimpleFunction('edad_usuario', array($this, 'edad_usuario')),
        );   
    }

    public function getName()
    {
        return 'edad_usuario_extension';
    }

    public function edad_usuario($fecha)
    {
        $cumpleanos = new DateTime($fecha);
        $hoy = new DateTime();
        $edad = $hoy->diff($cumpleanos);
    
        return $edad->y;
    }
}