How to check if a block exists in a twig template – Symfony2

You can solve it like this, if you want to display a certain block only if it has content. Hope, this is what you’re looking for.

Example index.html.twig

{% set _block = block('dynamic') %}
{% if _block is not empty %}
    {{ _block|raw }}
{% endif %}

Example part.html.twig

{% extends "index.html.twig" %}

{% block dynamic %}
    Block content goes here.
{% endblock %}