PHPBuilder.com has posted their latest and greatest article all about FDF support in PHP. FDF is the "Form Data Format" that you can use to put forms into PDFs and use them with PHP coding. Cool stuff...
Also, if you're new to the PHP world, and are still kind of getting your footing, be sure to check out PHPNewbie.net. They aim to be the one stop shop for all things for those new to PHP. So, far (with their new look and all), they are on the right track. So, hop on over and give them a look.