In ColdFusion, how can I determine if a variable exists within the querystring without throwing an error attempting to check it?
In ColdFusion, how can I determine if a variable exists within the querystring without
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In ColdFusion, how can I determine if a variable exists within the querystring without throwing an error attempting to check it?
There are two options.
The first is to use cfparam to define a default value eg:
This ensures that you can always refer to url.varname
The second is to use isDefined or structKeyExists to test for the presence of the variable:
or