Pressbooks\CustomCss::getBaseTheme PHP Метод

    static function getBaseTheme($slug)
    {
        $filename = static::getCustomCssFolder() . sanitize_file_name($slug . '.css');
        if (!file_exists($filename)) {
            return false;
        }
        $theme = get_file_data($filename, array('ThemeURI' => 'Theme URI'));
        $theme_slug = str_replace(array('http://pressbooks.com/themes/', 'https://pressbooks.com/themes/'), array('', ''), $theme['ThemeURI']);
        return untrailingslashit($theme_slug);
    }