[RFC] Pipe Assignment Operator

Hi internals,

I'd like to open discussion on my (first!) RFC for the pipe assignment operator (|>=):
https://wiki.php.net/rfc/pipe_assignment_operator

It adds a compound assignment form of the pipe operator, so that
$x |>= callable is shorthand for $x = $x |> callable, with
support for chaining. Implementation with tests is at:
https://github.com/php/php-src/pull/22633

Looking forward to your feedback.

Thanks!
Caleb