Contao\Automator::generateSitemap PHP Method

    public function generateSitemap($intId = 0)
    {
        $time = \Date::floorToMinute();
        $objDatabase = \Database::getInstance();
        $this->purgeXmlFiles();
        // Only root pages should have sitemap names
        $objDatabase->execute("UPDATE tl_page SET createSitemap='', sitemapName='' WHERE type!='root'");
        // Get a particular root page
        if ($intId > 0) {
            do {
                $objRoot = $objDatabase->prepare("SELECT * FROM tl_page WHERE id=?")->limit(1)->execute($intId);
                if ($objRoot->numRows < 1) {
                    break;
                }
                $intId = $objRoot->pid;
            } while ($objRoot->type != 'root' && $intId > 0);
            // Make sure the page is published
            if (!$objRoot->published || $objRoot->start != '' && $objRoot->start > $time || $objRoot->stop != '' && $objRoot->stop <= $time + 60) {
                return;
            }
            // Check the sitemap name
            if (!$objRoot->createSitemap || !$objRoot->sitemapName) {
                return;
            }
            $objRoot->reset();
        } else {
            $objRoot = $objDatabase->execute("SELECT id, language, sitemapName FROM tl_page WHERE type='root' AND createSitemap='1' AND sitemapName!='' AND (start='' OR start<='{$time}') AND (stop='' OR stop>'" . ($time + 60) . "') AND published='1'");
        }
        // Return if there are no pages
        if ($objRoot->numRows < 1) {
            return;
        }
        // Create the XML file
        while ($objRoot->next()) {
            $objFile = new \File('web/share/' . $objRoot->sitemapName . '.xml');
            $objFile->truncate();
            $objFile->append('<?xml version="1.0" encoding="UTF-8"?>');
            $objFile->append('<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">');
            // Find the searchable pages
            $arrPages = \Backend::findSearchablePages($objRoot->id, '', true);
            // HOOK: take additional pages
            if (isset($GLOBALS['TL_HOOKS']['getSearchablePages']) && is_array($GLOBALS['TL_HOOKS']['getSearchablePages'])) {
                foreach ($GLOBALS['TL_HOOKS']['getSearchablePages'] as $callback) {
                    $this->import($callback[0]);
                    $arrPages = $this->{$callback[0]}->{$callback[1]}($arrPages, $objRoot->id, true, $objRoot->language);
                }
            }
            // Add pages
            foreach ($arrPages as $strUrl) {
                $strUrl = rawurlencode($strUrl);
                $strUrl = str_replace(array('%2F', '%3F', '%3D', '%26', '%3A//'), array('/', '?', '=', '&', '://'), $strUrl);
                $strUrl = ampersand($strUrl, true);
                $objFile->append('  <url><loc>' . $strUrl . '</loc></url>');
            }
            $objFile->append('</urlset>');
            $objFile->close();
            // Add a log entry
            $this->log('Generated sitemap "' . $objRoot->sitemapName . '.xml"', __METHOD__, TL_CRON);
        }
    }