File magic class proposal

Hi guys, I'm interesting in hear opinions about file-magic class handler for Pear. What's that? It's a system for doing real detections of file types, by reading its contents and comparing them with the "magic numbers" listed in a special file called magic. You could get a better idea calling the "file" command at a unix prompt and viewing the contents of the "/usr/share/magic" file. My idea is to provide two different methods for detecting file types: 1) Reading file contents (safe) 2) By file extension and provide two different kinds of returned information: 1) Human redeable description (in several languages) 2) Mime type To be a little standar I chose to use the gnome-vfs files for doing that (http://cvs.gnome.org/lxr/source/gnome-vfs/data/mime/): gnome-vfs-mime-magic (magic numbers) gnome-vfs.mime (file name extensions) gnome-vfs.keys.in (descriptions) Utilities of that? For example, to autodetect mime types while creating attachments, to restrict valid http file uploads by a browser supported image format, to find what kind of file is stored in a DB blob, to assign different applications to attachments in a web mail, etc. Do you find it good? More ideas? Tomas V.V.Cox