Problem with submitting form while viewing in browser

Below is the php-pdftk.php.  Can  you tell me if I need to make a change...specifically to the /F key issue, which I do not really understand?  I have submitted a form to this page and it pulls the fillable pdf and merges the file.  The problem is that when I press the submit button (which is a generic submit button form acrobat.pdf...and which works 100% outside of the browser) it throws the error I stated in the opening post of this thread.

<?php

##################################################################################################################

#

# pdftk-php Class

# http://code.google.com/p/pdftk-php/

# http://www.pdfhacks.com/forge_fdf/

#

# License: Released under New BSD license - http://www.opensource.org/licenses/bsd-license.php

#

# Purpose: Contains functions used to inject data from MySQL into an empty PDF form

#

# Authors: Andrew Heiss (www.andrewheiss.com), Sid Steward (http://www.oreillynet.com/pub/au/1754)

#

# History:

# 8/26/08 - Initial programming

#

# Usage:

# $pdfmaker = new pdftk_php;

#

# $fdf_data_strings = array();

# $fdf_data_names = array();

# $fields_hidden = array();

# $fields_readonly = array();

# $pdf_original = "string"; = filename of the original, empty pdf form

# $pdf_filename = "string"; = filename to be used for the output pdf

#

# $pdfmaker->make_pdf($fdf_data_strings, $fdf_data_names, $fields_hidden, $fields_readonly, $pdf_filename);

#

##################################################################################################################

  class pdftk_php {

#############################################################################

#

# Function name: makePDF

#

# Purpose: Generate an FDF file from db data, inject the FDF in an empty PDF form

#

# Incoming parameters:

# $fetched_array - one row of fetched MySQL data saved as a variable

#

# Returns: Downloaded PDF file

#

# Notes:

# * For text fields, combo boxes and list boxes, add field values as a name => value pair to $fdf_data_strings. An example of $fdf_data_strings is given in /example/download.php

# * For check boxes and radio buttons, add field values as a name => value pair to $fdf_data_names.  Typically, true and false correspond to the (case sensitive) names "Yes" and "Off".

# * Any field added to the $fields_hidden or $fields_readonly array must also be a key in $fdf_data_strings or $fdf_data_names; this might be changed in the future

# * Any field listed in $fdf_data_strings or $fdf_data_names that you want hidden or read-only must have its field name added to $fields_hidden or $fields_readonly; do this even if your form has these bits set already

#

#############################################################################

  public function make_pdf($fdf_data_strings, $fdf_data_names, $fields_hidden, $fields_readonly, $pdf_original, $pdf_filename) {

  // Create the fdf file

  $fdf = $this->forge_fdf('', $fdf_data_strings, $fdf_data_names, $fields_hidden, $fields_readonly);

  // Save the fdf file temporarily - make sure the server has write permissions in the folder you specify in tempnam()

  $fdf_fn = tempnam(".", "fdf");

  $fp = fopen($fdf_fn, 'w');

  if($fp) {

  fwrite($fp, $fdf);

  fclose($fp);

  // Send a force download header to the browser with a file MIME type

  // header("Content-Type: application/force-download");

                // header("Content-Type: application/pdf");

  // header("Content-Disposition: attachment; filename=\"$pdf_filename\"");

  // Actually make the PDF by running pdftk - make sure the path to pdftk is correct

  // The PDF will be output directly to the browser - apart from the original PDF file, no actual PDF wil be saved on the server.

  passthru("C:\PDFtk\bin\pdftk.exe $pdf_original fill_form $fdf_fn output - ");

  // delete temporary fdf file

  unlink( $fdf_fn );

  }

  else { // error

  echo 'Error: unable to write temp fdf file: '. $fdf_fn;

  }

  } // end of make_pdf()

  protected function forge_fdf($pdf_form_url, &$fdf_data_strings, &$fdf_data_names, &$fields_hidden, &$fields_readonly) {

  /* forge_fdf, by Sid Steward

    version 1.1

    visit: www.pdfhacks.com/forge_fdf/

    PDF can be particular about CR and LF characters, so I spelled them out in hex: CR == \x0d : LF == \x0a

  */

  $fdf = "%FDF-1.2\x0d%\xe2\xe3\xcf\xd3\x0d\x0a"; // header

  $fdf.= "1 0 obj\x0d<< "; // open the Root dictionary

  $fdf.= "\x0d/FDF << "; // open the FDF dictionary

  $fdf.= "/Fields [ "; // open the form Fields array

  $fdf_data_strings = $this->burst_dots_into_arrays( $fdf_data_strings );

  $this->forge_fdf_fields_strings( $fdf,

  $fdf_data_strings,

  $fields_hidden,

  $fields_readonly );

  $fdf_data_names= $this->burst_dots_into_arrays( $fdf_data_names );

  $this->forge_fdf_fields_names( $fdf,

   $fdf_data_names,

   $fields_hidden,

   $fields_readonly );

  $fdf.= "] \x0d"; // close the Fields array

  // the PDF form filename or URL, if given

  if( $pdf_form_url ) {

  $fdf.= "/F (".$this->escape_pdf_string($pdf_form_url).") \x0d";

  }

  $fdf.= ">> \x0d"; // close the FDF dictionary

  $fdf.= ">> \x0dendobj\x0d"; // close the Root dictionary

  // trailer; note the "1 0 R" reference to "1 0 obj" above

  $fdf.= "trailer\x0d<<\x0d/Root 1 0 R \x0d\x0d>>\x0d";

  $fdf.= "%%EOF\x0d\x0a";

  return $fdf;

  }

  public function escape_pdf_string( $ss ) {

   $backslash= chr(0x5c);

   $ss_esc= '';

   $ss_len= strlen( $ss );

   for( $ii= 0; $ii< $ss_len; ++$ii ) {

  if( ord($ss{$ii})== 0x28 ||  // open paren

  ord($ss{$ii})== 0x29 ||  // close paren

  ord($ss{$ii})== 0x5c )   // backslash

   {

  $ss_esc.= $backslash.$ss{$ii}; // escape the character w/ backslash

   }

  else if( ord($ss{$ii}) < 32 || 126 < ord($ss{$ii}) ) {

   $ss_esc.= sprintf( "\\%03o", ord($ss{$ii}) ); // use an octal code

  }

  else {

   $ss_esc.= $ss{$ii};

  }

   }

   return $ss_esc;

  }

  protected function escape_pdf_name( $ss ) {

   $ss_esc= '';

   $ss_len= strlen( $ss );

   for( $ii= 0; $ii< $ss_len; ++$ii ) {

  if( ord($ss{$ii}) < 33 || 126 < ord($ss{$ii}) ||

  ord($ss{$ii})== 0x23 ) // hash mark

   {

  $ss_esc.= sprintf( "#%02x", ord($ss{$ii}) ); // use a hex code

   }

  else {

   $ss_esc.= $ss{$ii};

  }

   }

   return $ss_esc;

  }

  // In PDF, partial form field names are combined using periods to

  // yield the full form field name; we'll take these dot-delimited

  // names and then expand them into nested arrays, here; takes

  // an array that uses dot-delimited names and returns a tree of arrays;

  //

  protected function burst_dots_into_arrays( &$fdf_data_old ) {

   $fdf_data_new= array();

   foreach( $fdf_data_old as $key => $value ) {

  $key_split= explode( '.', (string)$key, 2 );

  if( count($key_split)== 2 ) { // handle dot

   if( !array_key_exists( (string)($key_split[0]), $fdf_data_new ) ) {

  $fdf_data_new[ (string)($key_split[0]) ]= array();

   }

   if( gettype( $fdf_data_new[ (string)($key_split[0]) ] )!= 'array' ) {

  // this new key collides with an existing name; this shouldn't happen;

  // associate string value with the special empty key in array, anyhow;

  $fdf_data_new[ (string)($key_split[0]) ]=

   array( '' => $fdf_data_new[ (string)($key_split[0]) ] );

   }

   $fdf_data_new[ (string)($key_split[0]) ][ (string)($key_split[1]) ]= $value;

  }

  else { // no dot

   if( array_key_exists( (string)($key_split[0]), $fdf_data_new ) &&

   gettype( $fdf_data_new[ (string)($key_split[0]) ] )== 'array' )

  { // this key collides with an existing array; this shouldn't happen;

   // associate string value with the special empty key in array, anyhow;

   $fdf_data_new[ (string)$key ]['']= $value;

  }

   else { // simply copy

  $fdf_data_new[ (string)$key ]= $value;

   }

  }

   }

   foreach( $fdf_data_new as $key => $value ) {

  if( gettype($value)== 'array' ) {

   $fdf_data_new[ (string)$key ]= $this->burst_dots_into_arrays( $value ); // recurse

  }

   }

   return $fdf_data_new;

  }

  protected function forge_fdf_fields_flags( &$fdf,

  $field_name,

  &$fields_hidden,

  &$fields_readonly ) {

   if( in_array( $field_name, $fields_hidden ) )

  $fdf.= "/SetF 2 "; // set

   else

  $fdf.= "/ClrF 2 "; // clear

   if( in_array( $field_name, $fields_readonly ) )

  $fdf.= "/SetFf 1 "; // set

   else

  $fdf.= "/ClrFf 1 "; // clear

  }

  protected function forge_fdf_fields( &$fdf,

   &$fdf_data,

   &$fields_hidden,

   &$fields_readonly,

   $accumulated_name,

   $strings_b ) // true <==> $fdf_data contains string data

  //

  // string data is used for text fields, combo boxes and list boxes;

  // name data is used for checkboxes and radio buttons, and

  // /Yes and /Off are commonly used for true and false

  {

   if( 0< strlen( $accumulated_name ) ) {

  $accumulated_name.= '.'; // append period seperator

   }

   foreach( $fdf_data as $key => $value ) {

  // we use string casts to prevent numeric strings from being silently converted to numbers

  $fdf.= "<< "; // open dictionary

  if( gettype($value)== 'array' ) { // parent; recurse

   $fdf.= "/T (".$this->escape_pdf_string( (string)$key ).") "; // partial field name

   $fdf.= "/Kids [ ";                                    // open Kids array

   // recurse

   $this->forge_fdf_fields( $fdf,

  $value,

  $fields_hidden,

  $fields_readonly,

  $accumulated_name. (string)$key,

  $strings_b );

   $fdf.= "] "; // close Kids array

  }

  else {

   // field name

   $fdf.= "/T (".$this->escape_pdf_string( (string)$key ).") ";

   // field value

   if( $strings_b ) { // string

  $fdf.= "/V (".$this->escape_pdf_string( (string)$value ).") ";

   }

   else { // name

  $fdf.= "/V /".$this->escape_pdf_name( (string)$value ). " ";

   }

   // field flags

   $this->forge_fdf_fields_flags( $fdf,

   $accumulated_name. (string)$key,

   $fields_hidden,

   $fields_readonly );

  }

  $fdf.= ">> \x0d"; // close dictionary

   }

  }

  protected function forge_fdf_fields_strings( &$fdf,

   &$fdf_data_strings,

   &$fields_hidden,

   &$fields_readonly ) {

   return

  $this->forge_fdf_fields( $fdf,

   $fdf_data_strings,

   $fields_hidden,

   $fields_readonly,

   '',

   true ); // true => strings data

  }

  protected function forge_fdf_fields_names( &$fdf,

  &$fdf_data_names,

  &$fields_hidden,

  &$fields_readonly ) {

   return

  $this->forge_fdf_fields( $fdf,

   $fdf_data_names,

   $fields_hidden,

   $fields_readonly,

   '',

   false ); // false => names data

  }

  }

?>

If the server-side PHP script is responding with a FDF file, be sure to include the /F key in the FDF response file outputted by the server. If the form is submitted from a web browser it will look for the /F key in the FDF file. If the form is submitted from Standalone Adobe Reader, then it doesn't need the /F file parameter in the FDF response.

If you are redirecting to a URL, be sure to include http:// at the beginning of the URL instead of starting he URL with www.

By the way; where did you get the script? Did you develop it or purchase it?

Let me know if this works.