How to access class constants in Twig?

Question

I have a few class constants in my entity class, e.g.:

class Entity {
    const TYPE_PERSON = 0;
    const TYPE_COMPANY = 1;
}

In normal PH

Answer 1

In book best practices of Symfony there is a section with this issue:

Constants can be used for example in your Twig templates thanks to the constant() function:

// src/AppBundle/Entity/Post.php
namespace AppBundle\Entity;

class Post
{
    const NUM_ITEMS = 10;

   // ...
}

And use this constant in template twig:

    Displaying the {{ constant('NUM_ITEMS', post) }} most recent results.

Here the link: http://symfony.com/doc/current/best_practices/configuration.html#constants-vs-configuration-options