Macromedia ColdFusion 5 Training from the Source (With CD-ROM)
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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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