[Freeswitch-users] empty var expression

Brian West brian at freeswitch.org
Tue Jan 18 03:46:25 MSK 2011

be careful... you shouldn't have anything if the variable doesn't exist but are you using lua or js?


On Jan 17, 2011, at 6:21 PM, Michael Collins wrote:

> Where is this variable getting or losing the "undef" value? Also, add this line to info and see what gets printed:
> <action application="log" data="WARNING $var contains '${var}'"/>
> That will print it out in purple letters to make it easier to see. FWIW, I tried this with various permutations of 'undefined' channel vars and expression="^$" always worked for me.
> -MC

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