ISDEFINED

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Used to determine whether or not a variable exists. Returns true if the variable does exist, false if it does not.

Syntax

 IsDefined("Name_of_variable") 

Parameters

IsDefined needs to know the name of the variable of which you want to check the existence.

Example

 <!--- Display a message if a product was added --->  <cfif IsDefined("url.message") AND url.message EQ "Product Added">   ** Product Added ** </cfif> 

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