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User who did this - Alex Hermann (axlh)
Attached to Project - sip-router Summary - Uninitialized $var returns 0 instead of <null> Task Type - Bug Report Category - Core Status - Assigned Assigned To - Andrei Pelinescu-Onciul Operating System - All Severity - Low Priority - Normal Reported Version - Development Due in Version - Undecided Due Date - Undecided Details - There is an annoying difference between an uninitialized $avp and $var. When the value is queried, the $avp returns <null> whereas the $var returns 0. The latter is wrong, as 0 is a meaningful value.
Suggested fix: uninitialized $var should return <null>
Example: $var(null) = $null; $avp(null) = $null; xlog("$$var(null) = $var(null)"); xlog("$$avp(null) = $avp(null)";
Output: $var(null) = 0 $avp(null) = <null>
More information can be found at the following URL: http://sip-router.org/tracker/index.php?do=details&task_id=141
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sip-router writes:
Details - There is an annoying difference between an uninitialized $avp and $var. When the value is queried, the $avp returns <null> whereas the $var returns 0. The latter is wrong, as 0 is a meaningful value.
this has been discussed before. check archives. if i remember correctly, vars are implemented in such a way that it is not possible to differentiate 0 from null.
-- juha
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Juha Heinanen -
sip-router