Call static function in Twig - twig

Question

I am pretty new to Twig. I have a class called Session and a static function called get I want to return the content of Session::get('user_name'). Is it even possible without modifying anything?
I tried {{ constant('Namespace\\Session::get("user_name")') }} and {{ Session.get('user_name') }} but it doesn't seem to work.

Answer 1

You could use Twig Extension like below:
class CustomExtension extends \Twig_Extension {
public function getFunctions() {
return array(
new \Twig_SimpleFunction('static_call', array($this, 'staticCall')),
);
}
function staticCall($class, $function, $args = array()) {
if (class_exists($class) && method_exists($class, $function)) {
return call_user_func_array(array($class, $function), $args);
}
return null;
}
}
Usage in in twig:
{{ static_call('AppBundle\\Entity\\YourEntity', 'GetSomething', ['var1', 'var2']) }}

Answer 2

I found the answer. I simply added the following code right after new Twig_Enviroment($twig_loader)
$twig = new Twig_Environment($twig_loader);
$twig->addFunction('_call', new Twig_Function_Function(
function($class, $function, $arguments = array())
{
return call_user_func(array($class, $function), $arguments);
})
);
In Twig
{{ _call('Session', 'get', 'user_name')|raw }}