Form generation on the fly / Dynamic forms / forms generated from models

[McAtze]

Has anyone tips with building applications similar too wufoo.com? I am building an app where the logged in user creates forms in a similar manner...what i am wondering is if zend, symfony or yii is best suited for this?I will be collecting tips here for other to see easier.advantages of the frameworks that could help with this:

• Symfony has doctrine (but forms are deployed by running a script?)
• Zend has its form and subformintegrations (and perhaps integratingdoctrine is possible?)
• Zend has form_decorators but they have a high threshold to learn.
• yii has its form builder and a good PDO database connection

or are there any other frameworks that simplify "form generation on the fly"? PS. djangos solution is very interesting but it needs to be in php.