[asterisk-users] Check if a variable is set

[Ishfaq Malik]

Hi

Is there any way to check if a variable is set in asterisk? I've had a 
look around and can't find a purpose built function for it.

I'm going to be using it to see if an argument has been passed with a 
macro or not (e.g. see if ${ARG3} is set or not)

Thanks in advance

Ish
-- 
Ishfaq Malik
Software Developer
PackNet Ltd

Office:   0161 660 3062