--- title: "[RFC] Case sensitive PHP" url: https://daily.dev/posts/rfc-case-sensitive-php-3mpdyw5b3 source_url: https://externals.io/message/131345 type: article source: "externals.io" published: 2026-06-17T11:12:36.077Z updated: 2026-06-17T11:12:56.638Z tags: ["php", "language-design"] reading_time: 6 upvotes: 0 comments: 0 language: 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] Case sensitive PHP **[externals.io](https://daily.dev/sources/externals)** · 6 min read · 0 upvotes · 0 comments ## Summary A PHP RFC proposing to make the language fully case-sensitive is being discussed on the PHP internals mailing list. Currently, PHP treats class names, function names, and other identifiers case-insensitively. The RFC author Jorg Sowa is reviving the discussion and still needs to complete impact analysis and performance benchmarks. Supporters like Seifeddine Gmati argue it would simplify static analysis by eliminating the need for name normalization. Critics raise concerns about PHP's inconsistent built-in naming conventions (DateTime vs PDO vs mysqli) creating confusion once case-sensitivity is enforced, and Rob Landers questions whether the gain justifies the migration cost. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [\[RFC\] Case sensitive PHP](https://daily.dev/posts/rfc-case-sensitive-php-ldj9l91ce) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Case sensitive PHP](https://daily.dev/posts/rfc-case-sensitive-php-6xtalepas) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Case sensitive PHP](https://daily.dev/posts/rfc-case-sensitive-php-npomkgpbs) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Case sensitive PHP](https://daily.dev/posts/rfc-case-sensitive-php-7bbb61l4f) · externals.io · 0 upvotes · 0 comments - [\[RFC\] Case sensitive PHP](https://daily.dev/posts/rfc-case-sensitive-php-eaz27adpk) · externals.io · 0 upvotes · 0 comments --- Tags: [#php](https://daily.dev/tags/php), [#language-design](https://daily.dev/tags/language-design) [View this post on daily.dev](https://daily.dev/posts/rfc-case-sensitive-php-3mpdyw5b3)