Am 17.09.2021 um 10:43 schrieb Nikita Popov <nikita....@gmail.com>: > The locale-sensitivity of strtolower() only works with legacy > single-byte encodings and as such is of questionable usefulness even in > cases where it is not actively harmful. > > That said, I do think this change requires an RFC.
I agree that this is a big enough BC to require an RFC and I'd recommend a phase where strtolower in combination with locales where it *did* make something useful to show a deprecation warning to allow migration away from strtolower in those cases. - Chris
