ktsirig

Hi!
I am trying to validate that a file submitted through a form is a TEXT file.
When I use $_FILES['userfile_PFAM']['type']=='text/plain' it works, but only for files with .txt extension.

But the user may also have a file containing text data and may not have given the .txt extension (for example I found that application/octet-stream also reffers to TEXT files).
Does anybody know which of the MIME types of PHP must I check for? The MIME types that reffer to TEXT I mean.

Thanx!