{{ form_start(iform,{ 'attr': { 'id': 'imagen_form' } }) }} <div class="row"> <div class="col-md-8"> {{ form_widget(iform) }} </div> <div class="col-md-4"> <br> <!--button class="btn">{{ button_label|default('Save') }}</button--> <button type="button" class="btn btn-success btn-sm" onclick="guardar_imagen();">Guardar</button> </div> </div> {{ form_end(iform) }}