Arguments and votes
Maybe if the function names didn't need to be in quotes... As it is certainly not.
Still hard to read. No extra benefits.
The only clean solution is to use scalar types (string, int, float, boolean) and arrays like objects:
$result = "Hello World"->htmlentities()->split()->map(strtoupper(...))->filter(fn($v) => $v != 'O');
Chain, clean oop, readable, IDE hint, no value parameter, no prefixes and an opportunity to correct the functions inconsistency. It could works beside functions: strtoupper($name) and $name->toUpper().
I see no immediate benefit of the proposed solution over the userland implementations. The RFC mentions a shopping cart example, but I don't think that's cleaner than using league/pipeline or Laravel's pipeline.
It's a bit messy for the simpler examples as well.
The idea is a nice one, and one that I would welcome, but this proposal puts forward messy syntax that isn't clear!
