In PHP, how do I deal with the difference in encoded filenames on HFS+ vs. elsewhere?

Answer 1

Have you checked that both systems use the same locale?

What encoding is the PHP script using on both systems?

I would also try using strcmp instead of the equals operator. I'm not sure if the equals operator uses strcmp internally, but it's a simple thing to test out in your case.

Answer 2

It seems that Mac OS X/HFS+ is using character combinations instead of single characters. So the ó (U+00F3) is instead encoded as o (U+006F) + ´ (U+CC81, COMBINING ACUTE ACCENT). See also Apple’s Unicode Decomposition Table.

Answer 3

Solved: The Normalizer class can be used to detect NFD strings and convert them to NFC. It's available in PHP 5.3 or through the PECL Internationalization extension.

if (!normalizer_is_normalized($str)) {
   $str = normalizer_normalize($str);
}