<form action="#" method="get" class="sidebar-form"> <div class="input-group"> <input type="text" name="q" class="form-control" placeholder="{{ 'Search'|trans({}, 'AdminLTEBundle') }}..."/> <span class="input-group-btn"> <button type='submit' name='search' id='search-btn' class="btn btn-flat"><i class="fas fa-search"></i></button> </span> </div></form>