Twig - How to check if variable is a number / integer

php types twig symfony

PHP Snippet 1:

{% if foo is numeric %}...{% endif %}

PHP Snippet 2:

namespace MyNamespace;
class MyTwigExtension extends \Twig_Extension
{

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

    public function getTests()
    {
        return [
            new \Twig_Test('numeric', function ($value) { return  is_numeric($value); }),
        ];
    }
}

PHP Snippet 3:

services:
    my_twig_extension:
        autowire: true
        class: AppBundle\MyNamespace\MyTwigExtension
        tags:
            - { name: twig.extension }