Method displayCustomCSS

public static function displayCustomCSS($customCss)
{
    if ($customCss != '') {
        $customCss = str_replace('background: url(images/', 'background: url(' . Uri::base(true) . '/media/com_phocagallery/images/', $customCss);
        $document = Factory::getDocument();
        $document->addCustomTag("\n <style type=\"text/css\"> \n" . strip_tags($customCss) . "\n </style> \n");
    }
}