Support for diffing unicode characters

[nullzero]

Hello! I found that this code cannot be used to diff between unicode characters. When trying to do that, the highlighted lines became blank. This issue can be fixed easily - Just use multibyte string function[1] instead of string function. Also, replace string indexing to mb_substr($str, $i, 1).

Cheers

Links [1] - http://php.net/manual/en/ref.mbstring.php

[JBlond]

Thanks for the mb string hint. I added unicode support in JBlond/php-diff