The function sets the document title according to global configuration options.

• string $title - The page title
• return void

public function setDocumentTitle($title)
 {
 $app = \JFactory::getApplication();

// Check for empty title and add site name if param is set
 if (empty($title))
 {
 $title = $app->get('sitename');
 }
 elseif ($app->get('sitename_pagetitles', 0) == 1)
 {
 $title = \JText::sprintf('JPAGETITLE', $app->get('sitename'), $title);
 }
 elseif ($app->get('sitename_pagetitles', 0) == 2)
 {
 $title = \JText::sprintf('JPAGETITLE', $title, $app->get('sitename'));
 }

$this->document->setTitle($title);
 }