--- title: [RFC] Primary Constructors | daily.dev description: A PHP internals mailing list thread discussing the proposed Primary Constructors RFC for PHP. The RFC author Rob Landers proposes a new syntax allowing class... canonical: https://daily.dev/posts/rfc-primary-constructors-gvpxifvw8 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: [RFC] Primary Constructors | daily.dev og:description: A PHP internals mailing list thread discussing the proposed Primary Constructors RFC for PHP. The RFC author Rob Landers proposes a new syntax allowing class... og:url: https://daily.dev/posts/rfc-primary-constructors-gvpxifvw8 og:image: https://api.daily.dev/og/posts/gvPXiFvW8.png og:image:alt: [RFC] Primary Constructors 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. # [RFC] Primary Constructors **[externals.io](https://daily.dev/sources/externals)** · 38 min read · 0 upvotes · 0 comments ## Summary A PHP internals mailing list thread discussing the proposed Primary Constructors RFC for PHP. The RFC author Rob Landers proposes a new syntax allowing class constructor parameters to be declared at the class level (e.g., `class Money(public readonly int $amount) {}`), saving boilerplate. The main debate centers on whether primary constructors should support a body for initialization/validation logic. Critics argue that omitting body support makes the feature incomplete and creates inconsistencies, especially for readonly classes where property hooks don't work. The RFC author defends the limited scope, citing that 30-70% of real-world constructors could benefit even without bodies, and suggests body support could be a follow-up RFC. A broader concern raised is PHP's pattern of shipping minimal features that never get completed. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [\[RFC\] Primary Constructors](https://daily.dev/posts/rfc-primary-constructors-wxnr1pmjb) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Primary Constructors](https://daily.dev/posts/rfc-primary-constructors-rwbey9qr0) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Primary Constructors](https://daily.dev/posts/rfc-primary-constructors-rmjnswd5v) · externals.io · 0 upvotes · 0 comments --- Tags: [#general-programming](https://daily.dev/tags/general-programming), [#php](https://daily.dev/tags/php) [View this post on daily.dev](https://daily.dev/posts/rfc-primary-constructors-gvpxifvw8) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"[RFC] Primary Constructors","url":"https://daily.dev/posts/rfc-primary-constructors-gvpxifvw8","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/rfc-primary-constructors-gvpxifvw8"},"datePublished":"2026-06-29T19:43:21.658Z","dateModified":"2026-06-29T19:43:47.035Z","description":"A PHP internals mailing list thread discussing the proposed Primary Constructors RFC for PHP. 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