I am looking for a tiny PHP script which allows web-based note taking. 

I do not want a database, so notes should be stored in files. I even do not need a hierarchy. 

One PHP file would be great but the actual premise is no database. It should be installed on a plugPC with limited disk space. So less than 300kb would be good.

Maybe it’s too simple for anybody to bother to upload and provide such a trivial tool.