Get joomla component/module/plugin params
<?php
// get plugin params
$plugin = JPluginHelper::getPlugin('system', 'debug');
$params = new JRegistry($plugin->params);
echo $params->get('profile');
// get module params
$module = JModuleHelper::getModule('mod_articles_latest');
$params = new JRegistry($module->params);
echo $params->get('count');
// get component params
$component = JComponentHelper::getParams('com_media');
$params = $component->get('upload_extensions');
echo $params
?>