mod_whosonline - нужен вывод имени, а не логина! - Модули и плагины

if ($showmode > 0) {
	$query = "SELECT DISTINCT u.name" //new
//old	$query = "SELECT DISTINCT a.username"
	."\n FROM #__session AS a"        
	."\n LEFT JOIN #__users AS u"     //new
        ."\n ON a.username=u.username"    //new
	."\n WHERE a.guest = 0"
	;
	$database->setQuery($query);
	$rows = $database->loadObjectList();
	
	if ( count( $rows ) ) {
		// output
		$output .= '<ul>';
	foreach($rows as $row) {
			$output .= '<li>';
			$output .= '<strong>';
			$output .= $row->name; //new
//old			$output .= $row->username;
			$output .= '</strong>';
			$output .= '</li>';
	}
		$output .= '</ul>';
	}
}