--- title: What's new in PHP 8.6 | daily.dev description: PHP 8.6, scheduled for release on November 19, 2026, introduces several notable features: partial function application (PFA) for prefilling closure parameters,... canonical: https://daily.dev/posts/what-s-new-in-php-8-6-eixar55ou twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: What's new in PHP 8.6 | daily.dev og:description: PHP 8.6, scheduled for release on November 19, 2026, introduces several notable features: partial function application (PFA) for prefilling closure parameters,... og:url: https://daily.dev/posts/what-s-new-in-php-8-6-eixar55ou og:image: https://api.daily.dev/og/posts/eiXar55Ou.png og:image:alt: What's new in PHP 8.6 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # What's new in PHP 8.6 **[stitcher.io](https://daily.dev/sources/stitcher)** · 15 min read · 103 upvotes · 7 comments ## Summary PHP 8.6, scheduled for release on November 19, 2026, introduces several notable features: partial function application (PFA) for prefilling closure parameters, readonly property defaults (now allowed when implementing interfaces with property hooks), a new low-level Polling API for I/O multiplexing with epoll/WSAPoll backends, a built-in clamp() function, new isReadable/isWriteable reflection methods, function parameter doc comments via ReflectionParameter::getDocComment(), a SortDirection enum, debuggable enums via __debugInfo(), and improved session security defaults (HttpOnly, SameSite=Lax). The release also includes a large set of deprecations covering legacy functions (is_double, is_integer, is_long, doubleval, strcoll, metaphone, spl_classes, spl_object_hash), ArrayIterator methods, SplFileObject CSV methods, returning from finally blocks and constructors/destructors, and reserving keywords like let, is, and namespace for future syntax. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@dchosenone** · 2 upvotes > Releasing PHP on GTA 6 release date is diabolical **@agustinbarrientos** · 1 upvotes > The polling API might be the sleeper feature for ReactPHP and Amp now that they have a native path beyond `stream_select`. **@baptistecrouzet** · 1 upvotes > Always good articles about PHP ! **@harispatel62** · 0 upvotes > Nice Explaination **@haohmaru444** · 0 upvotes > php ftw --- Tags: [#php](https://daily.dev/tags/php) [View this post on daily.dev](https://daily.dev/posts/what-s-new-in-php-8-6-eixar55ou) ```json 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feature for ReactPHP and Amp now that they have a native path beyond stream_select.","datePublished":"2026-08-06T18:59:56.754Z","url":"https://daily.dev/posts/eiXar55Ou#c-jLdglLEtP","author":{"@type":"Person","name":"Agustin Barrientos","url":"https://daily.dev/agustinbarrientos","image":"https://media.daily.dev/image/upload/s--5ayxQnqn--/f_auto/v1788281802/avatars/avatar_wQYYVe5Tbj0NJ7C7qPoa8?_a=BAMAMicg0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"Always good articles about PHP !","datePublished":"2026-08-04T09:45:56.056Z","url":"https://daily.dev/posts/eiXar55Ou#c-cotacPPkZ","author":{"@type":"Person","name":"Baptiste 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