Re: [RFC] __exists(), a magic method for distinguishing "missing" from "set to null"

Hi there, Le sam. 30 mai 2026 à 14:24, Nicolas Grekas <nicolas.grekas+php@gmail.com> a écrit : > Dear internals, > > Le ven. 1 mai 2026 à 11:37, Nicolas Grekas <nicolas.grekas+php@gmail..com> > a écrit : > >> Dear internals, >> >> It's my pleasure to submit this new RFC to yours. >> Please have a look and let me know: >> https://wiki.php.net/rfc/exists-magic-method >> >> TL;DR: I'm proposing a new opt-in magic method: >> >> public function __exists(string $name): bool; >> >> It'd let userland tell "set to null" apart from "missing" on >> objects, >> it'd restore >> isset() <=> ?? equivalence on magic properties, and it'd fixe GH-12695 as >> a >> corollary. It's forward-compatible as a regular method on PHP <= 8.5 >> (probeable >> via method_exists()), and would be magic on 8.6+. >> > > Following the feedback received so far, you might have seen that I've > split the materialized property check into a separate PR/thread, see > https://externals.io/message/131068 > > I therefore updated the text of the RFC, now at v0.2, to account for that > materialization issue being addressed separately. > I also updated the wording to mention the points that have been discussed > and simplify the wording a bit (less repetitions, less C-side stuff). > > I didn't update the implementation yet, but technically the TL;DR of this > new iteration is that it brings nothing new: it's only a refacto of the > presentation. > > This message starts a new discussion period. > Friendly before-opening-the-vote reminder about this RFC. I plan to start the vote this Sunday. Cheers, Nicolas