Shoutbox

Hey guys,
I'm working on a script, but my ftp functions have fallen through, due to a limitation in the server.  I've found out that I can upload to the same server using a base64 string, and also found a script snippet to convert from b64, but I cant find anything to convert to it.  Could anyone help me to do this, or recommend anywhere that I may be able to find some help?
Cheers
Leroux