# [RFC] Partial Function Application: Handling of Optional Parameters - Thread: https://externals.io/message/130682 - Original archive: https://news-web.php.net/php.internals/130682 - Started by tim@bastelstu.be on 2026-04-21T17:52:06+00:00 - Messages: 2 - RFC: Partial Function Application: Handling of Optional Parameters (Implemented (PHP 8.6)) — https://externals.io/rfc/partial_function_application_optional_placeholder.md - Reply by email to internals@lists.php.net - More for agents: search with https://externals.io/search.md?q={query} · RFCs at https://externals.io/rfc.md · JSON API at https://externals.io/api · documentation at https://externals.io/llms.txt --- ## #130682 — tim@bastelstu.be — 2026-04-21T17:52:06+00:00 URL: https://externals.io/message/130682#130682 Hi as part of the design for a “PFA for $this” RFC, Arnaud and I came across one issue in the original design of PFA that makes it hard to do the “PFA for $this” follow-up in a way that does not violate user expectations. Specifically the handling of “optional parameters”. With the support of Larry as one of the original authors of the PFA RFC, we would like to propose an amendment to the PFA RFC that is unlikely to affect real-world use-cases, but that will enable these follow-ups and that will result in a more predictable behavior overall. Please find all details in the RFC at: https://wiki.php.net/rfc/partial_function_application_optional_placeholder Unless significant discussion happens, I expect the RFC to go to vote in 2 weeks, so that it can be incorporated in the PFA implementation right away. Best regards Tim Düsterhus --- ## #130761 — tim@bastelstu.be — 2026-05-04T07:12:30+00:00 URL: https://externals.io/message/130682#130761 · In reply to: #130682 Hi Am 2026-04-21 19:52, schrieb Tim Düsterhus: > Please find all details in the RFC at: > https://wiki.php.net/rfc/partial_function_application_optional_placeholder > > Unless significant discussion happens, I expect the RFC to go to vote > in 2 weeks, so that it can be incorporated in the PFA implementation > right away. Tomorrow very exciting two weeks of discussion will have passed. I plan to open voting later this week. Best regards Tim Düsterhus