Adobe ColdFusion 8 Web Application Construction Kit, Volume 1: Getting Started

Deleting Client Variables

Once set, client variables are stored semi-permanently: they’re deleted only if a user’s browser doesn’t return to your site for 90 days. In the next section, you learn how to adjust the number of days that the variables are kept, but sometimes you will need to delete a client variable programmatically.

Note

It’s important to understand that a client doesn’t have its own expiration date. Client variables don’t expire individually; the whole client record is what expires. So, it’s not that a client variable is deleted 90 days after it is set. Rather, the client variable (and all other client variables assigned to the user’s machine) is deleted after the user lets 90 days pass before revisiting any pages in the application. ...