Embed data into PDF form on web server

sure it is
http://www.devarticles.com/c/a/PHP/Use-PHP-to-Create-Dynamic-pdf-Files/

hi tomvergote
The given link is to create a pdf file from scratch, and it is using PDFLib that is not free for commercial use :(

While i already have a pdf file with form created in Adobe Acrobat, and i want to insert data into that file on web server.

maybe a bit of a brute force way, but try to open a pdf in notepad or another text editor, as you can see it's plain text.
you could put strings in your pdf like "MYOWNCUSTOMFIELD0001" and then have php open the pdf file as plain text and do a string replace

I work a lot with PDFs and here are a couple more alternatives (not sure the brute force way would work as I've tried to modify PDFs with notepad and it always ends up damaging the file):

1) ActivePDF Toolkit provides a way tool to do that (I've used Toolkit and would recommend it .. their other tools I'm not so sure I'd recommend)
http://www.activePDF.com ... (this is not free, but already has built in methods for form filling from a database or whatever)
2) Ghostscript tools can also do this if I recall (I've used it for generating PDFs and applying security and things, but not for form filling)
http://www.cs.wisc.edu/~ghost/   It's free (GNU public licence) but will require a bit of extra coding to work with it .. for what I've used it for it works flawlessly

I have tried the given solutions, but it is not upto my needs.

At last i found a pdftk tool from www.accesspdf.com that can do what i want