Joomla Login redirect back to page to the previous page

If you want to redirect after login to the same page please use the code and enjoy ...

$return = JURI::getInstance()->toString();
$url    = 'index.php?option=com_user&view=login';
$url   .= '&return='.base64_encode($return);
$this->setRedirect($url, XiText::_('YOU_MUST_LOGIN_FIRST'));  // if you are in controller

or

JFactory::getApplication()->redirect($url, XiText::_('YOU_MUST_LOGIN_FIRST'));