[php-langspec][Issue #233] - Unicode codepoints are used in the specification, but the specification does not define encoding

You can view the Issue on github:
https://github.com/php/php-langspec/issues/233

Comment by IMSoP:
Yes, which is why I placed the emphasis on **the specification** using ASCII, rather than **the language** using ASCII. It would be possible to write the entire specification without any reliance on ASCII, by specifying every byte numerically; it's just more convenient for programmers to use a different notation.