How to Dump Debug Information in Twig Templates
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How to Dump Debug Information in Twig Templates
When using PHP, you can use the dump() function from the VarDumper component if you need to quickly find the value of a variable passed. This is useful, for example, inside your controller:
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// src/AppBundle/Controller/ArticleController.php
namespace AppBundle\Controller;
// ...
class ArticleController extends Controller
{
public function recentListAction()
{
$articles = ...;
dump($articles);
// ...
}
}
Note
The output of the dump()
function is then rendered in the web developer
toolbar.
The same mechanism can be used in Twig templates thanks to dump()
function:
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{# app/Resources/views/article/recent_list.html.twig #}
{{ dump(articles) }}
{% for article in articles %}
<a href="/article/{{ article.slug }}">
{{ article.title }}
</a>
{% endfor %}
The variables will only be dumped if Twig's debug
setting (in config.yml
)
is true
. By default this means that the variables will be dumped in the
dev
environment but not the prod
environment.