This is also a problem, IMO, in having this optimization in PHP. Anonymous functions are instances of a Closure class, which means that the `===` operator should return false for `foo() === foo()` just like it would for `new MyClass() === new MyClass()`.

But, since when has PHP ever prioritized correctness or consistency over trivial convenience? (I know it's anti-cool these days to hate on PHP, but I work with PHP all the time and it's still a terrible language even in 2026)

Its bad indeed. Its unfixable at this point. We just get bolton features.