“Java had some security issues for us, so that was off the table. PHP was just a better fit for us because of its ability to embed things with HTML pages,” says Kevin Dooley, senior IT specialist at the GAO and mastermind behind its survey application. “And of course it was free to try out, which makes a big difference.”
The part that I found interesting was that they developed their own language, QPL (Questionnaire Programming Language), implemented in C, which generates PHP code. Oh, and you can download the source.
via: PHP Everywhere