How to know which version of Symfony I have?

app/console --version

Rendering a Form in a Twig Template with Symfony2

        {{ form_widget(search_form.term) }}
        {{ form_widget(search_form.type) }}
        {{ form_widget(search_form.pool) }}
        {{ form_widget(search_form._token) }}

Symfony2 - convert datetime to string in a twig template

{{ game.gameDate|date('Y-m-d') }}

{{ item.gameDate|date('Y-m-d H:i:s') }}

How to use dump in TWIG?

{{ dump(product) }}

How to var_dump variables in twig templates?

{{ dump(user) }}