[FIXED] How to check if a block exists in a twig template - Symfony2

Issue

Imagine I have something like this in my twig template

{% block posLeft %}
   -----
{%endblock%}

Is there any way to check for existance of the posLeft block without calling to:

block("posLeft") 

And check the return value of the posBlock to varify the existance. I am a newbie in Symfony2 + Twig.

Solution

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 %}

Answered By - insertusernamehere

Answer Checked By - David Goodson (PHPFixing Volunteer)