Re: [RFC] Case sensitive PHP

On Wed, Jun 17, 2026, at 12:30, fennic log wrote: > I would be fully in favour of this RFC, but there is 1 hurdle which cant be ignored. > > What should the PHP naming convention be for these? > > Without deciding on what it should be we would be creating a new issue of mix-mash of > uppercase, lowercase and camelcase classes for example > > Few examples > - DateTime is documented as Camelcase - > https://www.php.net/manual/en/class.datetime.php > - PDO is documented as uppercase - > https://www.php.net/manual/en/class..pdo.php > - mysqli is documentated as lowercase - > https://www.php.net/manual/en/set.mysqlinfo.php > - ArrayAccess is documented as camelcase - > https://www.php.net/manual/en/class.arrayaccess.php > > PHP mixing case of definitions, at least with current system, users can choose their preferred > convention and it will work. > If we change to be case sensitive, we risk introducing a giant headache for devs, as they need > to remember what different casing each different builtin class is. > It will become a the new ($haystack, $needle) - > ($needle, $haystack) problem, and won't gain love from the > community. > > > > On Wed, 17 Jun 2026 at 01:03, Jorg Sowa <jorg.sowa@gmail.com> wrote: >> Hello internals, >> I would like to revive the discussion about fully case-sensitive PHP. I have collected the >> points raised in previous discussions, and browsed all affected language features and >> functionalities. >> I still need to perform the impact analysis and the performance benchmarks. I will add them >> to the RFC and inform in the thread when I complete it. >> >> RFC: https://wiki.php.net/rfc/case_sensitive_php >> Kind regards, >> Jorg I honestly can’t think of anything good that this RFC would bring. It would bring this cased salad into every code base and require changing code if you use a consistent casing throughout your code base. Just so that *person* and *Person* are different? That just sounds confusing to me. I’m not sure the gain — which I’m also unsure what the gain even is — is worth it. — Rob