I have not seen "PHP" listed as a language used in any Hacker News job posting in a very long time. Everything is Javascript/Typescript now, with the occasional Rust, C/C++, Golang, Python, Ruby. I never see PHP ever.
I count 5 based on that link. And only 2 are in USA, so my apologies, should have said "PHP + allowed to work in USA (remote/hybrid/onsite)". two is greater than zero, so hurray I guess...