Re: [RFC] Case sensitive PHP

On 2026-06-17 03:03, Jorg Sowa wrote:

Hello internals, I would like to revive the discussion about fully case-sensitive PHP. I have collected the points raised in previous discussions, and browsed all affected language features and functionalities. I still need to perform the impact analysis and the performance benchmarks. I will add them to the RFC and inform in the thread when I complete it. RFC: https://wiki.php.net/rfc/case_sensitive_php Kind regards, Jorg

Hey, 1. I don't think it's necessary to mess with ::class here. People are used to it not doing any checks. If it started doing some checks it would get confusing: why does it tell me if the case is wrong but says nothing if the class doesn't exist? And the warning is fired conditionally on whether the class is already loaded or not, which, according to RFC, is not a cool behaviour. Besides that wrong case warning would disappear and go back to silent in PHP 9.0, right? 2. Is the end goal in PHP 9.0 such that ActivityLog and Activitylog could both be defined as separate classes? And I can define my own StdClass? Or would definitions that only differ by case still be separate? BR, Juris