Sure.
Assuming you have some kind of web server running PHP that can accept uploads then you need to make a php file something like this:
Code:
<?php
//n.b. this script is for demo purposes only is is in no way suitable for real-world use!
$XFDFData = file_get_contents('php://input');
//make a file name using a time stamp - not necessarily guaranteed to be unique...
$theFileName = date("Y-m-d H-i-s").".xfdf";
//write the received data to the file
$fd = fopen($theFileName, "w");
fwrite($fd, $XFDFData, strlen($XFDFData)); //write into a file
fclose($fd);
//output some kind of response
echo "<html><body>Got it!</body></html>";
?>
As per my commend in the above code,
that's a long way from being production ready code! It's just to show the general idea. Let's say that you save it as uploads.php.
All you then need to do is create a submit button in your web form, and point it to your script. See my screen shot.
Submitted xfdf should now appear in the same folder as your upload.php script, assuming permissions etc allow.
That's the general idea, anyway.
Note that viewers would need to download the PDF and submit it. If you want them to fill it in whilst on your web page then I'd suggest an html form would be a much better option - there are plugins that'll do that for you. I use
http://contactform7.com for the support form at
http://www.ghostotter.com Works fine for me.
