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

Edit: I've found better solution, read about it here.

---

• Read more about how to create and register extension in Twig documentation.
• Read about Twig extensions in Symfony2 documentation.

---

Let's say you have class:

namespace MyNamespace;
class MyClass
{
    const MY_CONSTANT = 'my_constant';
    const MY_CONSTANT2 = 'const2';
}

Create and register Twig extension:

class MyClassExtension extends \Twig_Extension
{
    public function getName()
    { 
        return 'my_class_extension'; 
    }

    public function getGlobals()
    {
        $class = new \ReflectionClass('MyNamespace\MyClass');
        $constants = $class->getConstants();

        return array(
            'MyClass' => $constants
        );
    }
}

Now you can use constants in Twig like:

{{ MyClass.MY_CONSTANT }}