[asterisk-users] AEL: how to check if variable is defined

[Richard Lyman]

Philipp Kempgen wrote:
*snipped
> But I guess it wouldn't hurt to add a DEFINED() function to
> Asterisk.
>
> if (DEFINED(myvariable)) {
>     // ...
> }
>   
Isn't that what ISNULL is for?