Check if variable is string or array in Twig

Question

Is it possible to check if given variable is string in Twig ?

Expected solution:

messages.en.yml:

hello:
  stranger         


        

Answer 1

I found iterable to not be good enough since other objects can also be iterable, and are clearly different than an array.

Therefore adding a new Twig_SimpleTest to check if an item is_array is much more explicit. You can add this to your app configuration / after twig is bootstrapped.

$isArray= new Twig_SimpleTest('array', function ($value) {
    return is_array($value);
});
$twig->addTest($isArray);

Usage becomes very clean:

{% if value is array %}
    
{% else %}
    
{% endif % }