Undefined HTTP_POST_FILES

[Anon]

Hi

I can't use HTTP_POST_FILES as it is recommended in PHP manual. It always display 'Undefined variable HTTP_POST_FILES'. And I have some confusion on these problems.
1) What are the differences between used of $HTTP_POST_FILES['userfile']['name'] and $userfile (with register_global = On)
2) When I turned register_global to be Off, I got the problem. I can't use this:
href="http://directory/script.php?argm=10"

It will display 'Undefined variable $argm' in my script.php file. So, how can I send my variables from one page to the another page without using session.

Thank you

[Anon]

If register_globals=off (as recommended by php.net) you can access your variable from http://directory/script.php?argm=10 by using $_GET['argm'].