I don't know how well it works in a script, but I have used the "file" command to tell a file type.

# file filename
filename :ascii text

# file script.sh
script.sh :commands text

It works from the command line very well.


Here is another suggestion...

Are all of your files in one directory? If so, you can do a for loop.

for name in `ls *`
do
test -f $name
some other command
some other command
done

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