Adobe ColdFusion 9 Web Application Construction Kit, Volume 2: Application Development

Chapter 22 Building User-Defined Functions

IN THIS CHAPTER

Thinking About Extending CFML 3

Functions Turn Input into Output 4

Building Your First UDF 4

Creating Libraries of Related UDFs 13

Creating General-Purpose UDFs 18

Sharing UDF Libraries with Others 21

This chapter introduces you to the world of user-defined functions (UDFs). You can create your own functions to do just about anything you can think of. User-defined functions are easy to write and even easier to use. You use them just like ColdFusion’s built-in functions.

Thinking About Extending CFML

Throughout this book, you have been learning how to use CFML’s built-in tags and functions to produce dynamic Web pages. You have used tags like <cfquery> and <cfoutput> to display information ...