Exporting a PDF to an webserver via URL

Question

Hello all together,
I already tried a few forums but I couldn't find anything that would help me.
So: I created a form with Acrobat Pro. After this I inserted a button to send this form to a PHP-script. Now I have to questions:
1. Which key is needed to read the file out of the http-header? I think it should have been sent with the POST-method. Is this right (but with print_r($_POST); I get printed an empty array)?
2. The button to send the form isn't working in Adobe Reader on iPhone (iOS 7). I can see the button but I can't click it. Ist this a bug or is this just not supported?
Many thanks in advance for your help!
Best regards,
Stefan
PS: I'd like to get this file automatically saved on my webspace. How could I handle this? I tried move_uploaded_file() but I can't realise this without the key...

Answer 1

Ah, ok. Get it. Now I finished writing the script. If someone would like to use it, here it is (shortened):
<?php
$filename = 'FILENAME.pdf';
$content = $HTTP_RAW_POST_DATA;
if (!$handle = fopen($filename, "w+"))
   print "Kann die Datei $filename nicht öffnen";
   exit;
// Schreibe $content in die geöffnete Datei.
if (!fwrite($handle, $content))
  print "Kann in die Datei $filename nicht schreiben";
  exit;
          $from = "FILENAME.pdf";
          $to = "NEW_DIR/NEW_FILE.pdf";
  rename($from, $to);
  fclose($handle);
?>
Thank you George for your quick help!