Variables are created in different ways depending on the variable type. The table below describes how ColdFusion Express supported variables are created.
|Local||The CFSET or CFPARAM tag.|
|Query||The CFQUERY tag.|
|Form||Passes from the HTML form to the action page.|
|URL||Passes from the query string (?) at the end of a URL to a target page.|
|Cookie||The CFSET or CFCOOKIE tag.|
|CGI||Passes from the browser and server during a browser request.|
|Application||The CFSET or CFPARAM tag.|
During this chapter, you will create and reference a local variable, learn how to reference some CGI variables and, learn how to set cookie variables. You will create other variables on an as needed basis throughout this book. For example, you will create and reference query variables in Chapter 5, Building Pages that Retrieve Data and form variables in Chapter 7, Using Forms and Action Pages.