FDF File Processing

I have government PDF forms that need to be filled out with data resides in our database.

The idea is that a user of our system requests a form for a particular party and when the form is pulled up it is auto populated with the parties information. It appears this is what FDF is for. I can define the values of the fields that are to be populated with some PHP and the data from our database.

After some research it appears FDF is not native to PHP 5.3. Is there something else in its place? Was there a particular reason it wasn’t included in 5.3? Is there a better alternative to what I’m trying to do?

TL;DR - I have government PDF’s that I need to auto fill. Whats the best way?