{# This is a template fragment designed to be included in other templates See https://symfony.com/doc/current/book/templating.html#including-other-templates A common practice to better distinguish between templates and fragments is to prefix fragments with an underscore. That's why this template is called '_flash_messages.html.twig' instead of 'flash_messages.html.twig'#}{# The request method check is needed to prevent starting the session when looking for "flash messages": https://symfony.com/doc/current/session/avoid_session_start.html TIP: With FOSHttpCache you can also adapt this to make it cache safe: https://foshttpcachebundle.readthedocs.io/en/latest/features/helpers/flash-message.html#}{% if app.request.hasPreviousSession %} {% for type, messages in app.flashes %} {% for message in messages %} <div class="alert alert-{{ type }} alert-dismissible"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button> {{ message|trans|raw }} </div> {% endfor %} {% endfor %}{% endif %}