FluidXml\CssTranslator::xpath PHP Method

    public static function xpath($css)
    {
        $xpath = $css;
        $stack = [];
        $index = 0;
        foreach (self::MAP as $o) {
            // The regexes have a common wrapper.
            list($search, $replace, $id, $repeat) = $o;
            $search = "/{$search}/xi";
            do {
                $prev_xpath = $xpath;
                self::tokenize($search, $replace, $id, $xpath, $stack, $index);
            } while ($repeat && $xpath !== $prev_xpath);
        }
        self::translateStack($stack, $xpath);
        $xpath = \trim($xpath);
        $xpath = ".//{$xpath}";
        $xpath = \str_replace('|', '|.//', $xpath);
        $xpath = \str_replace('.///', '/', $xpath);
        return $xpath;
    }