Joomla如何在自己的代码中获得用户的自定义字段值?

<?php 

//Joomla dependencies

define('_JEXEC', 1);    

define('JPATH_BASE', realpath(dirname(__FILE__) . '/../..'));

define( 'DS', DIRECTORY_SEPARATOR );

require_once JPATH_BASE . '/includes/defines.php';

require_once JPATH_BASE . '/includes/framework.php';



//initialize

$app = JFactory::getApplication('site');

$app->initialise();



//more global Joomla depencies

JLoader::import('joomla.application.component.controller');

JLoader::import('joomla.application.component.model'); 

jimport( 'joomla.user.helper' );



//Joomla user depencies    

JLoader::register('FieldsHelper', JPATH_ADMINISTRATOR . '/components/com_fields/helpers/fields.php'); 

if(!class_exists('UsersModelUser')) require(JPATH_ROOT.DS.'administrator'.DS.'components'.DS.'com_users'.DS.'models'.DS.'user.php');

if(!class_exists('FieldsModelField')) require(JPATH_ROOT.DS.'administrator'.DS.'components'.DS.'com_fields'.DS.'models'.DS.'field.php');



//get user and custom fields

$user = JFactory::getUser('user@email.com');

$jcFields = FieldsHelper::getFields('com_users.user', $user, true);

print_r($jcFields);