[pmwiki-devel] Testing empty string

[marc]

Jiri Hladuvka / OBUTEX said...
> Hans napsal(a):
> >
> > BTW, what is the difference between NULL and ""
> > (and 0 for that matter)?
>
> I'm not php coder but in some other languages NULL is the value
> of the variable that is defined but with no initial value.

Just to be complete, this isn't true for all languages. Initialisation 
is language independent. For example, Java initialises primitive 
variables to zero or false (member variables, that is, you can't declare 
a variable inline without initialising it), although object references 
are created as null.

-- 
Cheers,
Marc