I've released the code for our web-based perceptual study as a github repo. It's a combination of client-side javascript to serve up the survey questions and server-side php scripts to save the response to plain text files. This is a good set up for smallish surveys ~100/200 subjects. I found that it was much easier to work with organized plain text files than setting up an SQL database.
Hopefully it's easy to see how to edit the php scripts/files/etc. to make use of this for your projects.