Creating user-defined functions - Adobe Inc.
https://helpx.adobe.com/coldfusion/developing-applications/building-blocks-of-coldfusion-applications/writing-and-calling-user-defined-functions/creating-user-defined-functions.html
WEBApr 27, 2021 · Using a CFML tag in a user-defined function. The most important advantage of using the cffunction tag over defining a function in CFScript is that you can include CFML tags in the function. Thus, UDFs can encapsulate activities, such as database lookups, that require ColdFusion tags.
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