On Fri, 18 Jun 2021 at 9:48 am, Marc Bennewitz <marc@mabe.berlin> wrote:
> Not sure but what happens if you have like a DB connection in big5, > sjis, ... and add an integer as ASCII char into it? But that's the only > edge case I can think of. The integer character code points are the same in all three. PHP represents integers with the western arabic numerals 0-9, so as long as their code points are the same, nothing changes between any of the charsets. While I’ve not checked all other character encodings (far too many), the ones I did check were the most-used character encodings and they all used extended ASCII (that includes big5 and Shift JIS). The only exception is that there is something called EBCDIC (an old IBM character encoding descended from punch cards), but it’s very deprecated and PHP doesn’t work with it anyway - PHP explicitly has not supported it since 8.0 “EBCDIC targets are no longer supported, though it's unlikely that they were still working in the first place.” https://www.php.net/manual/en/migration80.other-changes.php
