PHP: rfc:pipe-operator-v3

PHP RFC introduces the pipe operator (|>), enabling function composition by passing values from the left side to a single-parameter callable on the right. This operator promises improved readability and efficiency by chaining multiple function calls without intermediary variables. The proposal outlines the operator's functionality, precedence, performance, and typical use cases, highlighting its benefits in simplifying code and supporting point-free style programming popular in other languages.