coldfusion ignore undefined variables

4
votes

if I use 

<cfoutput>#somevariable#</cfoutput>

and somevariable is not defined I get an error, how can I prevent the error from occourring? is there a simple way of implementing a conditional that doesn't require a bunch of extra lines?

2
coldfusion

2 Answers

11
votes
<cfparam name="somevariable" default="" />

If you're on cf 9 you can use a ternary operation, but cfparam is more 'best practicey'.

#isDefined("somevariable") ? somevariable : 'default string'#
1
votes

You can test for the variable

<cfoutput>
    <cfif isDefined("somevariable")>
        #somevariable#
    <cfelse>
        handle default scenario here
    </cfif>
</cfoutput>

or you could use inline conditional

<cfoutput>
    #IIF(isDefined("somevariable"),de(somevariable),de(""))#
</cfoutput>