From the Internals PHP list:
For over a decade, Microsoft has helped fund build infrastructure for the PHP for Windows community. We decided to transition out of this effort starting with the upcoming release and as part of our yearly review of this investment. During this transition, we will work with members of the community who choose to take this packaging on. While we will no longer work on PHP builds for Windows, expect to see us remain involved in PHP in many ways across MS as we continue supporting PHP developers and collaborating with the community on security fixes.
But seriously, who uses PHP for Windows? I use it in WSL