Variable Scope

The primary differences between variable types are where they exist, how long they exist, and where their values are stored. These considerations are referred to as a variable's scope.

The table below describes the ColdFusion Express variables by their scope.

Variable Type Scope
Local The page on which it is created.
Query The page on which it is created.
Form The action page that's associated with a form.
URL The target page for the hyperlink.
Cookie All browser sessions.
CGI All sessions.
Application The specific application for which it is created.

You will learn more about scope on an as needed basis throughout this book.