[asterisk-users] Check if a variable is set

[Ishfaq Malik]

I'm basically trying to make an argument optional in a macro, I'm 
starting to think it's not possible

If I do this in my macro
exten => s,2,ExecIf(EXISTS(${ARG3})=1 & ${ARG3}=1|<whatever I want to do>

I see this in the console
Executing [s at macro-extcall:2] ExecIf("SIP/PACK501-08222428", "EXISTS()=1 
& =1|<whatever I want to do>

As I didn't pass a third argument.

Essentially, what I'm trying to do in php terms would be this
if(isset($var) && $var==1)

Ish

ABBAS SHAKEEL wrote:
> Sorry its macro I called it a function.
>
> This link will be helpful to you
> http://www.voip-info.org/wiki/index.php?page=Asterisk+variables
>
>
> On Fri, Oct 16, 2009 at 3:13 PM, ABBAS SHAKEEL 
> <shakeel.abbas.qau at gmail.com <mailto:shakeel.abbas.qau at gmail.com>> wrote:
>
>     If you want to check in Console then NOOP can be used .
>     if in case of function call you can check its length if there
>     exists some thing
>
>
>     On Fri, Oct 16, 2009 at 3:04 PM, Ishfaq Malik <ish at pack-net.co.uk
>     <mailto:ish at pack-net.co.uk>> wrote:
>
>         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
>
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>
>
>
>     -- 
>     Best Regards
>     Shakeel Abbas
>
>
>
>
> -- 
> Best Regards
> Shakeel Abbas
>
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>
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-- 
Ishfaq Malik
Software Developer
PackNet Ltd

Office:   0161 660 3062