Frontend\Core\Engine\Header::parseCustomHeaderHTMLAndGoogleAnalytics PHP Method

    private function parseCustomHeaderHTMLAndGoogleAnalytics()
    {
        // get the data
        $siteHTMLHeader = (string) $this->get('fork.settings')->get('Core', 'site_html_header', null);
        $siteHTMLFooter = (string) $this->get('fork.settings')->get('Core', 'site_html_footer', null);
        $webPropertyId = $this->get('fork.settings')->get('Analytics', 'web_property_id', null);
        // search for the webpropertyId in the header and footer, if not found we should build the GA-code
        if ($webPropertyId != '' && mb_strpos($siteHTMLHeader, $webPropertyId) === false && mb_strpos($siteHTMLFooter, $webPropertyId) === false) {
            $anonymize = $this->get('fork.settings')->get('Core', 'show_cookie_bar', false) && !CommonCookie::hasAllowedCookies();
            $request = $this->getContainer()->get('request');
            $trackingCode = '<script>
                              (function(i,s,o,g,r,a,m){i[\'GoogleAnalyticsObject\']=r;i[r]=i[r]||function(){
                              (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
                              m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
                              })(window,document,\'script\',\'//www.google-analytics.com/analytics.js\',\'ga\');
                              ga(\'create\', \'' . $webPropertyId . '\', \'' . $request->getHttpHost() . '\');
                            ';
            if ($anonymize) {
                $trackingCode .= 'ga(\'send\', \'pageview\', {\'anonymizeIp\': true});';
            } else {
                $trackingCode .= 'ga(\'send\', \'pageview\');';
            }
            $trackingCode .= '</script>';
            $siteHTMLHeader .= "\n" . $trackingCode;
        }
        // store language
        $this->jsData['LANGUAGE'] = LANGUAGE;
        // encode and add
        $jsData = json_encode($this->jsData);
        $siteHTMLHeader .= "\n" . '<script>var jsData = ' . $jsData . '</script>';
        // assign site wide html
        $this->tpl->addGlobal('siteHTMLHeader', trim($siteHTMLHeader));
    }