$app = JFactory::getApplication();
$pageclass = $app->getParams()->get('pageclass_sfx', '');
 
$jinput = JFactory::getApplication()->input;
$option = $jinput->getCmd('option'); // This gets the component
$view   = $jinput->getCmd('view');   // This gets the view
$layout = $jinput->getCmd('layout'); // This gets the view's layout

Protostar example: Use Fluid Layout for category menu items with Class ' liquid'

<div class="container<?php echo ($params->get('fluidContainer') ? '-fluid' : ''); ?><?php if( $pageclass == ' liquid' && $view == 'category' ) { echo '-fluid'; } ?>">

Override: components/com_fields/layouts/field/render.php

Remove colon in this line:

<span class="field-label"><?php echo htmlentities($label, ENT_QUOTES | ENT_IGNORE, 'UTF-8'); ?>: </span>

<?php echo JText::_('COM_CONTENT_READ_MORE_TITLE'); ?>

?tmpl=component

https://www.yourdomain.com/page.html?tmpl=component

	<?php
		jimport('joomla.application.module.helper');
		$modules = JModuleHelper::getModules('adsense');
		$options = array('style' => 'xhtml');
		foreach($modules as $module) {
			echo JModuleHelper::renderModule($module, $options, null);
		}
	?>

Access component parameters from inside own component

To access component params in component itself, I use JFactory::getApplication() like below:

$app = JFactory::getApplication();
$params = $app->getParams();
$param = $params->get('show_create_date');

To access component parameters from another component:

$content_params = JComponentHelper::getParams( 'com_content' );
$show_date = $content_params->get( 'show_create_date' );

Or even shortcut:

$show_date = JComponentHelper::getParams('com_content')->get('show_create_date');

Get module parameters from template's index.php file:

$module = JModuleHelper::getModule('mod_headlineticker');
$headLineParams = new JRegistry($module->params);
$tickercount = (int) $headLineParams['count'];

Get plugin parameters from inside a plugin

$param = $this->params->get('paramName', defaultValue);

Get plugin parameters anywhere inside Joomla

// Get plugin 'relatedarticles' of type 'content'
$plugin = JPluginHelper::getPlugin('content', 'relatedarticles');
// Check if plugin is enabled
if ($plugin)
{
    // Get plugin params
    $pluginParams = new JRegistry($plugin->params);
    $catids = $pluginParams->get('catids');
}

Access Current Menu parameters:

$app = JFactory::getApplication();
// Get active menu
$currentMenuItem = $app->getMenu()->getActive();
// Get params for active menu
$params = $currentMenuItem->params;
// Access param you want
$yourParameter = $params->get('yourParameter');

Access Menu parameters from a known Itemid:

$app = JFactory::getApplication();
// Get Itemid from URL
$input  = JFactory::getApplication()->input;
$itemId = $input->get->get('Itemid', '0', 'INT');
// Get menu from Itemid
$menuItem = $app->getMenu()->getItem($itemId);
// Get params for menuItem
$params = $menuItem->params;
// Access param you want
$yourParameter = $params->get('yourParameter');

Template parameters from inside a template

$param = $this->params->get('paramName', defaultValue);

Template parameters from outside a template

$app = JFactory::getApplication('site');
$template = $app->getTemplate(true);
$param = $template->params->get('paramName', defaultValue);

https://docs.joomla.org/How_do_you_recover_or_reset_your_admin_password%3F/de

INSERT INTO `YOURPREFIX_usergroups` (`id`, `parent_id`, `lft`, `rgt`, `title`) VALUES
(1, 0, 1, 18, 'Public'),
(2, 1, 8, 15, 'Registered'),
(3, 2, 9, 14, 'Author'),
(4, 3, 10, 13, 'Editor'),
(5, 4, 11, 12, 'Publisher'),
(6, 1, 4, 7, 'Manager'),
(7, 6, 5, 6, 'Administrator'),
(8, 1, 16, 17, 'Super Users'),
(9, 1, 2, 3, 'Guest');

INSERT INTO `YOURPREFIX_viewlevels` (`id`, `title`, `ordering`, `rules`) VALUES
(1, 'Public', 0, '[1]'),
(2, 'Registered', 1, '[6,2,8]'),
(3, 'Special', 2, '[6,3,8]'),
(5, 'Guest', 0, '[9]'),
(6, 'Super Users', 0, '[8]');

INSERT INTO `YOURPREFIX_assets` (`id`, `parent_id`, `lft`, `rgt`, `level`, `name`, `title`, `rules`) VALUES
(1, 0, 1, 1628, 0, 'root.1', 'Root Asset', '{"core.login.site":{"6":1,"2":1,"14":1,"10":1},"core.login.admin":{"6":1,"14":1,"10":1},"core.login.offline":{"6":1},"core.admin":{"8":1},"core.manage":{"7":1},"core.create":{"6":1,"3":1},"core.delete":{"6":1},"core.edit":{"6":1,"4":1},"core.edit.state":{"6":1,"5":1},"core.edit.own":{"6":1,"3":1}}');