JToolbarHelper::addNew('newitem', 'New Item');
JToolbarHelper::save('saveitem', 'Save Item');
JToolbarHelper::cancel('cancelitem', 'Cancel Item');This code will create a button with the label "Cancel Item" and the action "cancelitem". In summary, JToolbarHelper is a part of the Joomla PHP framework that enables the easy creation of toolbars for backend websites.