@EXT[filename]: Returns the extension from a filename, without a leading
period. On HPFS drives the extension can be up to 64 characters long. On
traditional FAT drives it can be up to 3 characters long.
Created using Inf-PHP v.2 (c) 2003 Yuri Prokushev
Created using Inf-HTML v.0.9b (c) 1995 Peter Childs