Name
Eval() — Evaluates any Asterisk variables located within a string
Synopsis
Eval(newvar
=string
)
Processes the given string
and
evaluates any variables contained in the string. The resulting value
is assigned to the variable newvar
.
This application is used in situations where a string is used in the dialplan, but any variables contained within it need to be evaluated first. This is often the case when the string is retrieved from a database or other external source.
; go through some convoluted steps to create a string that contains
; the unparsed variable ${UNIQUEID}
exten => 123,1,Set(ONE=\$)
exten => 123,2,Set(TWO=$[{UNIQUEID}])
; print the values to the console, to make sure it hasn't been parsed
exten => 123,3,NoOp(${ONE}${TWO})
; now evaluate the variables in the string
exten => 123,4,Eval(TEST=${ONE}${TWO})
; print the result to the console
exten => 123,5,NoOp(${TEST})
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