在ASCII文件中包含UTF8文件

Question

In the project I'm working there are lots of ASCII files. A file that is included in all files needs to be UTF8 in order to work properly.

What problems I might face if I include an UTF8 file in ASCII and visa versa?

include 'x.php'

I couldn't find any free tool to convert files to UTF8 encoding in bulk, for windows.

Edit: x.php have a function to convert utf8 text to ascii. ascii encoded php files includes x.php and use the function.

Answer 1

A pure 7-bit ASCII file is an exact subset of UTF-8 (note that doesn't hold true for extended 8-bit ASCII). If you mix ASCII and UTF-8 files, the result will all be valid UTF-8. If you tried to convert ASCII to UTF-8, you'd end up with the same ASCII file; it's already valid UTF-8.

As long as whatever you're doing with those files handles UTF-8 correctly, you're already handling ASCII correctly as well.

You may want to read What Every Programmer Absolutely, Positively Needs To Know About Encodings And Character Sets To Work With Text.