{# This is a template fragment designed to be included in other templates See https://symfony.com/doc/current/templates.html#including-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 check is needed to prevent starting the session when looking for "flash messages": https://symfony.com/doc/current/session.html#avoid-starting-sessions-for-anonymous-users 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 %} <div class="messages"> {% for type, messages in app.flashes %} {% for message in messages %} {# Bootstrap alert, see https://getbootstrap.com/docs/3.4/components/#alerts #} <div class="alert alert-dismissible alert-{{ type }} fade in" role="alert"> <button type="button" class="close" data-dismiss="alert" aria-label="{{ 'action.close'|trans }}"> <span aria-hidden="true">×</span> </button> {{ message|trans }} </div> {% endfor %} {% endfor %} </div>{% endif %}