Conduct Web experiments using PHP, Part 1

By Paul Meagher
2005-03-16

VLOG package

The main purpose of the visitor-logging package is to supply a visitor ID to the stimulus-response package so the allotment of stimulus codes to site visitors is properly managed and visitor responses (or lack thereof) are properly logged. To learn more about the VLOG package, you can consult my developerWorks tutorial "Web site User Modeling with PHP" in which I discuss an earlier procedural version of this user-tracking code (see Resources).

For the purposes of this article, all you need to know is that the VLOG package tracks visitors across sessions through a persistent identity cookie (in this example, $_COOKIE['vis_id']).

Tutorial pages:

Use categorical data analysis tools to analyze factorial Web experiments
A question of design
Goal decomposition
VLOG package
Database Schema
WebOffer table
SR package
Generating the design
Assigning stimulus codes
Logging responses
Understanding the demo
Demo source code
In conclusion
Resources

First published by IBM developerWorks

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