However, it does change this: 7f8954 into 7F8954.
What? I thought that's what you wanted it to do...

SORRY! It should say that it does NOT convert 7f8954 to 7F8954
I'm confused now. You mean $fields[0] = uc($fields[0]); isn't converting 7f8954 to 7F8954?

$fields[0] = "7f8954";
$fields[0] = uc($fields[0]);
[download]

$fields[0] should now have a value of "7F8954"

$fields[0] =~ tr/a-z/A-Z/; will also work.

Joshua