[thelist] Basic PHP question about: 'Notice: Undefined variable'

[Chris Dempsey]

One of the Clients has asked us about an error on one of the sites they are
involved with but that we did not write.

It's written in PHP [I only use ASP] and is throwing an error on the page
which allows users to login to the admin area:

Notice: Undefined variable: PHP_SELF in e:\Websites\xxxx\admin\login.php on
line 12

The code on line 12 is:  $FF_LoginAction = $PHP_SELF;

The rest of the page appears to render correctly showing the login form.

Would I be correct in thinking that this simply means that the variable
PHP_SELF is undefined in the code?  As in is it equivalent to doing this in
ASP:

<%
	option explicit

	varWhatever = "something"
%>

Or is something more serious wrong with the code?

Thanks,

Chris.