CssSelector converts CSS selectors to XPath expressions.
The component only goal is to convert CSS selectors to their XPath equivalents:
use Symfony\Component\CssSelector\CssSelector; print CssSelector::toXPath('div.item > h4 > a');
This component is a port of the Python lxml library, which is copyright Infrae and distributed under the BSD license.
Current code is a port of https://github.com/SimonSapin/cssselect@fd2e70