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fix filling forms in multiple files. (wrong buffer usage, invalid off…
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…sets).

fix deprecated coding (php 7.x).
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@codeshell
codeshell committed Nov 9, 2017
1 parent 98dd42f commit e376dc1
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5 changes: 3 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
@@ -1,9 +1,10 @@
# Form filling
The FPDM class allows to fill out PDF forms, i.e. populate fields of a PDF file. It is **developed by Olivier Plathey**, author of the [FDPF Library](http://www.fpdf.org/), and has been released as [Skript 93](http://www.fpdf.org/en/script/script93.php).

I created this repository for two reasons:
- make the current FPDM source available via [composer](https://packagist.org/packages/codeshell/fpdm)
I created this repository for the following reasons:
- make the current FPDM source available via [composer](https://packagist.org/packages/tmw/fpdm)
- fix compatibility issues with PHP 7.x
- bugfixing

This repository only contains the separate php class written for form filling. If you are looking for a repository containing the main FPDF Library, please head over to [github.com/Setasign/FPDF](https://github.com/Setasign/FPDF).

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91 changes: 45 additions & 46 deletions fpdm.php
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Expand Up @@ -64,45 +64,45 @@ class FPDM {
//@@@@@@@@@


var $pdf_source; //string: full pathname to the input pdf , a form file
var $fdf_source; //string: full pathname to the input fdf , a form data file
var $pdf_output; //string: full pathname to the resulting filled pdf

var $pdf_entries; //array: Holds the content of the pdf file as array
var $fdf_content; //string: holds the content of the fdf file
var $fdf_parse_needed;//boolean: false will use $fields data else extract data from fdf content
var $value_entries; //array: a map of values to faliclitate access and changes
var $positions; //array, stores what object id is at a given position n ($positions[n]=<obj_id>)
var $pdf_source = ''; //string: full pathname to the input pdf , a form file
var $fdf_source = ''; //string: full pathname to the input fdf , a form data file
var $pdf_output = ''; //string: full pathname to the resulting filled pdf

var $pdf_entries = array(); //array: Holds the content of the pdf file as array
var $fdf_content = ''; //string: holds the content of the fdf file
var $fdf_parse_needed = false;//boolean: false will use $fields data else extract data from fdf content
var $value_entries = array(); //array: a map of values to faliclitate access and changes
var $positions = array(); //array, stores what object id is at a given position n ($positions[n]=<obj_id>)

var $offsets; //array of offsets for objects, index is the object's id, starting at 1
var $pointer; //integer, Current line position in the pdf file during the parsing
var $offsets = array(); //array of offsets for objects, index is the object's id, starting at 1
var $pointer = 0; //integer, Current line position in the pdf file during the parsing

var $shifts; //array, Shifts of objects in the order positions they appear in the pdf, starting at 0.
var $shift; //integer, Global shift file size due to object values size changes
var $shifts = array(); //array, Shifts of objects in the order positions they appear in the pdf, starting at 0.
var $shift = 0; //integer, Global shift file size due to object values size changes

var $streams; //Holds streams configuration found during parsing
var $streams_filter; //Regexp to decode filter streams
var $streams = ''; //Holds streams configuration found during parsing
var $streams_filter = ''; //Regexp to decode filter streams

var $safe_mode; //boolean, if set, ignore previous offsets do no calculations for the new xref table, seek pos directly in file
var $check_mode; //boolean, Use this to track offset calculations errors in corrupteds pdfs files for sample
var $halt_mode; //if true, stops when offset error is encountered
var $safe_mode = false; //boolean, if set, ignore previous offsets do no calculations for the new xref table, seek pos directly in file
var $check_mode = false; //boolean, Use this to track offset calculations errors in corrupteds pdfs files for sample
var $halt_mode = false; //if true, stops when offset error is encountered

var $info; //array, holds the info properties
var $fields; //array that holds fields-Data parsed from FDF
var $info = array(); //array, holds the info properties
var $fields = array(); //array that holds fields-Data parsed from FDF

var $verbose; //boolean , a debug flag to decide whether or not to show internal process
var $verbose_level; //integer default is 1 and if greater than 3, shows internal parsing as well
var $verbose = false; //boolean , a debug flag to decide whether or not to show internal process
var $verbose_level = 1; //integer default is 1 and if greater than 3, shows internal parsing as well

var $support; //string set to 'native' for fpdm or 'pdftk' for pdf toolkit
var $flatten_mode; //if true, flatten field data as text and remove form fields (NOT YET SUPPORTED BY FPDM)
var $compress_mode; //boolean , pdftk feature only to compress streams
var $uncompress_mode; //boolean pdftk feature only to uncompress streams
var $security; //Array holding securtity settings
var $support = ''; //string set to 'native' for fpdm or 'pdftk' for pdf toolkit
var $flatten_mode = false; //if true, flatten field data as text and remove form fields (NOT YET SUPPORTED BY FPDM)
var $compress_mode = false; //boolean , pdftk feature only to compress streams
var $uncompress_mode = false; //boolean pdftk feature only to uncompress streams
var $security = array(); //Array holding securtity settings
//(password owner nad user, encrypt (set to 40 or 128 or 0), allow <permissions>] see pdfk help

var $needAppearancesTrue; //boolean, indicates if /NeedAppearances is already set to true
var $isUTF8; //boolean (true for UTF-8, false for ISO-8859-1)
var $needAppearancesTrue = false; //boolean, indicates if /NeedAppearances is already set to true
var $isUTF8 = false; //boolean (true for UTF-8, false for ISO-8859-1)

/**
* Constructor
Expand All @@ -112,7 +112,7 @@ class FPDM {
*@param string $fdf_source Source-Filename
*@param boolean $verbose , optional false per default
*/
function FPDM() {
function __construct() {
//==============

$args=func_get_args();
Expand Down Expand Up @@ -617,7 +617,7 @@ function Output($dest='', $name=''){
$this->Error($ret["return"]);
}

$this->buffer=$this->get_buffer($pdf_file);
//$this->buffer=$this->get_buffer($pdf_file);


$dest=strtoupper($dest);
Expand Down Expand Up @@ -649,13 +649,13 @@ function Output($dest='', $name=''){
header('Content-Type: application/pdf');
if(headers_sent())
$this->Error('Some data has already been output, can\'t send PDF file');
header('Content-Length: '.strlen($this->buffer));
header('Content-Length: '.strlen($this->get_buffer()));
header('Content-Disposition: inline; filename="'.$name.'"');
header('Cache-Control: private, max-age=0, must-revalidate');
header('Pragma: public');
ini_set('zlib.output_compression','0');
}
echo $this->buffer;
echo $this->get_buffer();
break;
case 'D':
//Download file
Expand All @@ -664,7 +664,7 @@ function Output($dest='', $name=''){
header('Content-Type: application/x-download');
if(headers_sent())
$this->Error('Some data has already been output, can\'t send PDF file');
header('Content-Length: '.strlen($this->buffer));
header('Content-Length: '.strlen($this->get_buffer()));
header('Content-Disposition: attachment; filename="'.$name.'"');

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
Expand All @@ -676,7 +676,7 @@ function Output($dest='', $name=''){
header('Cache-Control: private, max-age=0, must-revalidate');
header('Pragma: public,no-cache');
ini_set('zlib.output_compression','0');
echo $this->buffer;
echo $this->get_buffer();
break;
case 'F':
//Save to local file
Expand All @@ -685,12 +685,12 @@ function Output($dest='', $name=''){
if(!$f)
$this->Error('Unable to create output file: '.$name.' (currently opened under Acrobat Reader?)');

fwrite($f,$this->buffer,strlen($this->buffer));
fwrite($f,$this->get_buffer(),strlen($this->get_buffer()));
fclose($f);
break;
case 'S':
//Return as a string
return $this->buffer;
return $this->get_buffer();
default:
$this->Error('Incorrect output destination: '.$dest);
}
Expand Down Expand Up @@ -1111,7 +1111,7 @@ function get_xref_start_value() {
/**
* Read the offset of the xref table directly from file content
*
* @note content has been previously been defined in $this->buffer
* @note content has been previously been defined in $this->get_buffer()
* @param int $object_id an object id, a integer value starting from 1
* @return int the wished xrefstart offset value
*/
Expand All @@ -1138,15 +1138,15 @@ function get_offset_object_value($object_id) {
static $positions=null;
static $shifts=null;

if(is_null($offsets)) { //...variables content set once. This is the beauty of php :)
//if(is_null($offsets)) { //...variables content set once. This is the beauty of php :)

//!NOTE: xref table is ordered by object id (position's object is not defined linearly in the pdf !)
$positions=$this->_get_positions_ordered();
//Makes it 0 indexed as object id starts from 1 and positions starts from 0
$offsets=$this->_get_offsets_starting_from_zero();
//Shifts are already 0 indexed, don't change.
$shifts=$this->shifts;
}
//}

$p=$positions[$object_id];
$offset=$offsets[$p];
Expand All @@ -1158,13 +1158,13 @@ function get_offset_object_value($object_id) {
/**
* Reads the offset of the xref table directly from file content
*
* @note content has been previously been defined in $this->buffer
* @note content has been previously been defined in $this->get_buffer()
* @param int $object_id an object id, a integer value starting from 1
* @return int the wished offset
*/
function read_offset_object_value($object_id) {
//------------------------------
$buffer=$this->buffer;
$buffer=$this->get_buffer();
$previous_object_footer='';//'endobj' or comment;
$object_header=$previous_object_footer.'\n'.$object_id.' 0 obj';
$chars = preg_split('/'.$object_header.'/', $buffer, -1, PREG_SPLIT_OFFSET_CAPTURE);
Expand Down Expand Up @@ -1266,7 +1266,7 @@ function fix_xref_table() {
$extract_offset_value_from_file=($this->safe_mode||$this->check_mode);

//Get new file content (ie with values changed)
$this->buffer=$this->get_buffer();
//$this->get_buffer()=$this->get_buffer();

for($i=0;$i<$xLen;$i++) {

Expand Down Expand Up @@ -2112,5 +2112,4 @@ function Error($msg) {

}

unset($__tmp);
?>
unset($__tmp);

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