They take inspiration from everything! I think that's one of the most interesting aspects of PHP design since version 5.0 is that they sort of unpretentiously take the good concept and syntax ideas from any language that has them.

Definitely some JS influence plus a little Swift and Java. PHP seems to be evolving faster than it has in years

That's a funny thing to say, considering those took inspiration from other languages.

Probably FB’s Hack and similar efforts were influences first, since they predate the rise of TS.

On the other hand, though, PHP’s always tended to be a borrowing language that accumulates features from elsewhere, so there probably is some TS influence.