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ColdFusion 9 Developer Tutorial

You're reading from   ColdFusion 9 Developer Tutorial Create robust professional web applications with ColdFusion

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Product type Paperback
Published in Jul 2010
Publisher Packt
ISBN-13 9781849690249
Length 388 pages
Edition 1st Edition
Languages
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Author (1):
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John Farrar John Farrar
Author Profile Icon John Farrar
John Farrar
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Table of Contents (22) Chapters Close

ColdFusion 9 Developer Tutorial
Credits
About the Author
About the Reviewers
1. Preface
1. Web Pages—Static to Dynamic 2. Basic CFCs and Database Interaction FREE CHAPTER 3. Power CFCs and Web Forms 4. ORM Database Interaction 5. Application, Session, and Request Scope 6. Authentication and Permissions 7. CFScript 8. CF AJAX User Interface 9. CF AJAX Forms 10. CF AJAX Programming 11. Introduction to Custom Tags 12. ColdFusion Powered Views 13. Control Logic Processing 14. Guide to Unit Testing Beyond this Book Tools and Resources Index

Scope visibility


There are some places where variable scopes can be seen or used from other code pages, and others where they cannot. In this chapter, the creation and management of several aspects of these variables will be explained just by referring to the code. Scope just identifies and determines where something is visible. Each variable type listed in the following table has a specific range of code that can see the variable's structure for each of the scopes:

Variable scope

Visibility (ability to interact with it)

Application

To all ColdFusion code in this unique application while it persists.

Request

To all the ColdFusion code within the same request.

Session

To all the ColdFusion code in this unique application while the unique session persists and only to the connections that identify themselves to the server as that session.

There are a few other scopes that are available. These include the client scope and the server scope. These are usually avoided, but may be of use...

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