Check if a variable is a date with Twig

Question

I have an array of variables that I want to display in a Twig template and each variable can be either a string or a date.

If the variable is a date, I want to apply

Answer 1

You could add a class(my_var) function, for example:

// src/AppBundle/Twig/HelperExtension.php

namespace AppBundle\Twig;

use Twig_Extension;
use Twig_SimpleFunction;

class HelperExtension extends Twig_Extension
{
    public function getFunctions()
    {
        return array(
            new Twig_SimpleFunction('class', array($this, 'getClassName')),
        );
    }

    public function getClassName($object)
    {
        if (!is_object($object)) {
            return null;
        }
        return get_class($object);
    }
}

Usage:

{% if class(my_var) == 'DateTime' %}
    ...
{% endif %}