Joomla! Documentation™

Joomla! 

4.0

Base Namespaces

The recommended naming conventions in Joomla 4 are the following:

Components

Core Components

• Joomla\Component\<ComponentName>\<ClientName>
  • Joomla\Component\Content\Site
  • Joomla\Component\Content\Administrator

3rd Party Components

• <CompanyName>\<ComponentName>\<ClientName>
  • Acme\Backup\Site
  • Acme\Backup\Administrator

Example locations

Joomla\Component\Content\Site\Controller
components/com_content/Controller/ArticleController.php

Joomla\Component\Content\Administrator\Controller
administrator/components/com_content/Controller/ArticlesController.php

Modules

Core Modules

• Joomla\Module\<ModuleName>\<ClientName>
  • Joomla\Module\UsersLatest\Site
  • Joomla\Module\Quickicon\Administrator

3rd Party Modules

• <CompanyName>\Module\<ModuleName>\<ClientName>
  • Acme\Module\SubscriptionStatus\Site
  • Acme\Module\LastBackupStatus\Administrator

Example locations

Joomla\Module\Quickicon\Administrator\Dispatcher
administrator/modules/mod_quickicon/Dispatcher/Dispatcher.php

Joomla\Module\UsersLatest\Site\Helper
modules/mod_users_latest/Helper/UsersLatestHelper.php

Plugins

Core Plugins

• Joomla\Plugin\<PluginGroup>\<PluginName>
  • Joomla\Plugin\System\Debug
  • Joomla\Plugin\Quickicon\Joomlaupdate

3rd Party Plugins

• <CompanyName>\Plugin\<PluginGroup>\<PluginName>\
  • Acme\Plugin\System\BackupOnDemand

Example locations

Joomla\Plugin\System\Debug
plugins/system/debug/DataFormatter.php

Joomla\Plugin\Quickicon\Joomlaupdate\Extension
plugins/quickicon/joomlaupdate/Extension/Joomlaupdate.php

Framework

Joomla Framework Library

• Joomla
  • Joomla\Session
  • Joomla\Image

Joomla CMS Library

• Joomla\CMS
  • Joomla\CMS\Mail
  • Joomla\CMS\MVC

Example locations

Joomla\Session
libraries/vendor/joomla/session/src/Session.php

Joomla\CMS\Mail
libraries/src/Mail/Mail.php