ID3 PHP Library
It is a bundle of PHP file or PHP library for handling audio/video files metadata such as mp3, avi, flac. This library provides both reading and writing metadata, based on ID3 tags, to audio/video files. This library consists of a lot function to handle reading and writing metadata of mp3 files.
We have designed a tool for editing metadata of mp3 file. You may check it here. MP3 Metadata editor.