如何修复iTunes Feed上的Unicode字符问题

I am trying to pull applications from the Apple App Store using their authorised flat feed. However, I am having a tough time dealing with the encoding issues. Here are some examples :

A Japanese app titled

ホームページ用和英辞典

is displayed as

ホームページ用和英辞å

Not just that, even commonly used special characters like '(apostrophe), “(quote) are displayed with characters like ’ and “.

Can someone please help me with how this issue can be sorted out?

Edited to Add : I am working on PHP

What character set is the feed provided in, and what character set are you declaring your document to be? It's pretty common for people starting out to be sending ISO-8859-1, while reading in a UTF-8 feed. You'll want those two to match for simplicity.

These two articles may also be of interest while dealing with these issues

It looks like you are either not retaining the original character coding or you are outputting Unicode into a non Unicode coded stream.