JPluginHelper::isEnabled('system', 'languagecode');
JPluginHelper::isEnabled('system');
$plugin = JPluginHelper::getPlugin('system', 'languagecode'); if ($plugin && $plugin->isEnabled()) { // plugin is enabled }This code first retrieves the "languagecode" plugin in the "system" group using the getPlugin() function. Then it checks if the plugin is enabled using the isEnabled() function of the plugin object. These examples suggest that JPluginHelper belongs to the Joomla! package library.