Internal Structures

Due to their speed and versatility, structures are employed by ColdFusion for much of its internal data. The following variable prefixes are structures in ColdFusion:

• APPLICATION

• ATTRIBUTES

• CFCATCH

• CFERROR

• CFFILE

• CFFTP

• CFHTTP

• CGI

• CLIENT

• COOKIE

• FORM

• REQUEST

• SERVER

• SESSION

• THIS

• THISTAG

• URL

• VARIABLES

You may use <cfdump> to display the members of any structure. For example, to dump all CGI variables, you can use the following:

 <cfdump var="#CGI#"> 

TIP

Knowing about structures translates into a stronger grasp of ColdFusion in general. You can flush SESSION variables, for example, by issuing StructClear(session).

SESSION variables were covered in Chapter 11, "Session State Management."