Joomla Developer Manual

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\Component\ComponentName\ClientName
  • Acme\Component\Backup\Site
  • Acme\Component\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