Book Image

Railo 3 Beginner's Guide

By : Mark Drew , Gert Franz, Paul Klinkenberg, Jordan Michaels
Book Image

Railo 3 Beginner's Guide

By: Mark Drew , Gert Franz, Paul Klinkenberg, Jordan Michaels

Overview of this book

<p>Railo Server is one of the quickest ways to start developing complex web applications online. Widely considered as the fastest CFML (ColdFusion Markup Language) engine, Railo allows you to create dynamic web pages that can change depending on user input, database lookups, or even the time of day.</p> <p>Railo 3 Beginner's Guide will show you how to get up and running with Railo, as well as developing your web applications with the greatest of ease. You will learn how to install Railo and the basics of CFML to allow you to gradually build up your knowledge, and your dynamic web applications, as the book progresses.</p> <p>Using Packt’s Beginner's Guide approach, this book will guide you, with step-by-step instructions, through installing the Railo Server on various environments. You will learn how to use caches, resources, Event Gateways and special scripting functions that will allow you to create webpages with limitless functionality. You will even explore methods of extending Railo by adding your own tags to the server and building custom extensions. Railo 3 Beginner's Guide is a must for anyone getting to grips with Railo Server.</p>
Table of Contents (16 chapters)
Railo 3
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface

Time for action - using the REQUEST Scope


To demonstrate how this works, let's see what is in the request, include another file, set variables there and see what we end up with. Let's get started:

  1. 1. In the index.cfm file you created, put the following code:

    <cfdump var="#REQUEST#" label="Initial request">
    <cfset REQUEST.myNewVar = "Hello there!">
    <cfdump var="#REQUEST#" label="Now with our added variable">
    <cfinclude template="included.cfm">
    
  2. 2. Now, let's create another file in which we'll include the <cfinclude> tag. We'll name it as included.cfm and put the following code inside it:

    <cfdump var="#REQUEST#" label="Showing the request scope in an included file">
    
  3. 3. Save the file and now run it in the web browser by going to http://localhost:8888/myApp; we should see the following:

What just happened?

As you can see, the value that we added in index.cfm is available in the request scope of the included file.

The REQUEST scope is available to ALL the templates...