BookStack\Services\ExportService::pageToContainedHtml PHP Метод

    public function pageToContainedHtml(Page $page)
    {
        $cssContent = file_get_contents(public_path('/css/export-styles.css'));
        $pageHtml = view('pages/export', ['page' => $page, 'css' => $cssContent])->render();
        return $this->containHtml($pageHtml);
    }