The PHP project has had a long-standing but unwritten, vague, and inconsistently applied proscription against mentioning or using third-party PHP projects on the grounds that it implies some sort of endorsement over other third-party projects. This has impacted the web projects (bugs.php.net, etc) and documentation in ways that seem harmful to the overall PHP community.
Adopt this statement of principle:
The web, documentation, infrastructure, and any auxiliary projects within the PHP Project can use or document the existence of third-party PHP projects as part of their roles in supporting the overall PHP community. Such use does not represent endorsement of those third-party projects by the PHP Project.