PDF Funzioni

Remarks about Deprecated PDFlib Functions

Starting with PHP 4.0.5, the PHP extension for PDFlib is officially supported by PDFlib GmbH. This means that all the functions described in the PDFlib Reference Manual are supported by PHP 4 with exactly the same meaning and the same parameters. However, with PDFlib Version 5.0.4 or higher all parameters have to be specified. For compatibility reasons, this binding for PDFlib still supports most of the deprecated functions, but they should be replaced by their new versions. PDFlib GmbH will not support any problems arising from the use of these deprecated functions. The documentation in this section indicates old functions as "Deprecated" and gives the replacement function to be used instead.

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User Contributed Notes 25 notes

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2
sebastien at malot dot fr
8 months ago
Do you have a sample pdf ?
Can you try those classes :

http://gist.github.com/smalot/6183152
or
http://www.zikko.se/resources/extractFromPDF.php

can you see your links on the extracted content ?
BR
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2
thodge at ipswich dot qld dot gov dot au
8 years ago
Yet another addition to the PDF text extraction code last posted by jorromer. The code only seemed to work for PDF 1.2 (Acrobat 3.x) or below. This pdfExtractText function uses regular expressions to cover cases I have found in PDF 1.3 and 1.4 documents. The code also handles closing brackets in the text stream, which were ignored by the previous version. My regular expression skills are somewhat lacking, so improvements may possible by a more skilled programmer. I'm sure there are still cases that this function will not handle, but I haven't come across any yet...

<?php

function pdf2string($sourcefile) {

   
$fp = fopen($sourcefile, 'rb');
   
$content = fread($fp, filesize($sourcefile));
   
fclose($fp);

   
$searchstart = 'stream';
   
$searchend = 'endstream';
   
$pdfText = '';
   
$pos = 0;
   
$pos2 = 0;
   
$startpos = 0;

    while (
$pos !== false && $pos2 !== false) {

       
$pos = strpos($content, $searchstart, $startpos);
       
$pos2 = strpos($content, $searchend, $startpos + 1);

        if (
$pos !== false && $pos2 !== false){

            if (
$content[$pos] == 0x0d && $content[$pos + 1] == 0x0a) {
               
$pos += 2;
            } else if (
$content[$pos] == 0x0a) {
               
$pos++;
            }

            if (
$content[$pos2 - 2] == 0x0d && $content[$pos2 - 1] == 0x0a) {
               
$pos2 -= 2;
            } else if (
$content[$pos2 - 1] == 0x0a) {
               
$pos2--;
            }

           
$textsection = substr(
               
$content,
               
$pos + strlen($searchstart) + 2,
               
$pos2 - $pos - strlen($searchstart) - 1
           
);
           
$data = @gzuncompress($textsection);
           
$pdfText .= pdfExtractText($data);
           
$startpos = $pos2 + strlen($searchend) - 1;

        }
    }

    return
preg_replace('/(\s)+/', ' ', $pdfText);

}

function
pdfExtractText($psData){

    if (!
is_string($psData)) {
        return
'';
    }

   
$text = '';

   
// Handle brackets in the text stream that could be mistaken for
    // the end of a text field. I'm sure you can do this as part of the
    // regular expression, but my skills aren't good enough yet.
   
$psData = str_replace('\)', '##ENDBRACKET##', $psData);
   
$psData = str_replace('\]', '##ENDSBRACKET##', $psData);

   
preg_match_all(
       
'/(T[wdcm*])[\s]*(\[([^\]]*)\]|\(([^\)]*)\))[\s]*Tj/si',
       
$psData,
       
$matches
   
);
    for (
$i = 0; $i < sizeof($matches[0]); $i++) {
        if (
$matches[3][$i] != '') {
           
// Run another match over the contents.
           
preg_match_all('/\(([^)]*)\)/si', $matches[3][$i], $subMatches);
            foreach (
$subMatches[1] as $subMatch) {
               
$text .= $subMatch;
            }
        } else if (
$matches[4][$i] != '') {
           
$text .= ($matches[1][$i] == 'Tc' ? ' ' : '') . $matches[4][$i];
        }
    }

   
// Translate special characters and put back brackets.
   
$trans = array(
       
'...'                => '…',
       
'\205'                => '…',
       
'\221'                => chr(145),
       
'\222'                => chr(146),
       
'\223'                => chr(147),
       
'\224'                => chr(148),
       
'\226'                => '-',
       
'\267'                => '•',
       
'\('                => '(',
       
'\['                => '[',
       
'##ENDBRACKET##'    => ')',
       
'##ENDSBRACKET##'    => ']',
       
chr(133)            => '-',
       
chr(141)            => chr(147),
       
chr(142)            => chr(148),
       
chr(143)            => chr(145),
       
chr(144)            => chr(146),
    );
   
$text = strtr($text, $trans);

    return
$text;

}

?>
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2
uwe at steinmann dot cx
9 years ago
Those looking for a free replacement of pdflib may consider
pslib at http://pslib.sourceforge.net which produces PostScript but it can be easily turned into PDF by Acrobat Distiller or ghostscript. The API is very similar and even hypertext functions are supported. There
is also a php extension for pslib in PECL, called ps.
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1
SID TRIVEDI
6 years ago
/*
Folks, There is an excellent tutorial from Rasmus Lerdorf available at (It does not support I.E.)

http://talks.php.net/show/osconpdf/

Where PHP Mastermind Guru (Father) explained nicely about text, fonts, images and their attributes with working snippets.

Another tutorial can be found at

www.devshed.com/c/a/PHP/Building-PDF-Documents-with-PHP-5

Hence following is the various size of PDF Document.

Origin is at the lower left and the basic unit is the DTP pt.

1 pt = 1/72 inch = 0.35277777778 mm

Some common page sizes

Format          Width   Height
US-Letter      612      792
US-Legal       612      1008
US-Ledger     1224     792
11x17           792      1224
A0                2380    3368
A1                1684    2380
A2                1190    1684
A3                842      1190
A4                595      842
A5                421      595
A6                297      421
B5                501      709

*/
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0
bolyde at gmail dot com
5 years ago
Hi,
To find the page number of a PDF File, i find this :

<?php
public function getNumPagesInPDF(array $arguments = array())
{
@list(
$PDFPath) = $arguments;
$stream = @fopen($PDFPath, "r");
$PDFContent = @fread ($stream, filesize($PDFPath));
if(!
$stream || !$PDFContent)
    return
false;
   
$firstValue = 0;
$secondValue = 0;
if(
preg_match("/\/N\s+([0-9]+)/", $PDFContent, $matches)) {
   
$firstValue = $matches[1];
}
 
if(
preg_match_all("/\/Count\s+([0-9]+)/s", $PDFContent, $matches))
{
   
$secondValue = max($matches[1]);
}
return ((
$secondValue != 0) ? $secondValue : max($firstValue, $secondValue));
}
?>
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0
info at tecnick dot com
6 years ago
For those of us that do not want to pay for a commercial license to use PDFlib I suggest TCPDF:

http://tcpdf.sf.net

TCPDF is an Open Source PHP class for generating PDF files on-the-fly without requiring external extensions. This class is already adopted by a large number of php projects such as phpMyAdmin, Drupal, Joomla, Xoops, TCExam, etc. 

Starting from 2.1 version TCPDF supports UTF-8 Unicode and bidirectional languages such as Arabic and Hebrew.
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0
Ken McColl
6 years ago
To get this to work on Windows do not use escapeshellcmd()

From online help:
Following characters are preceded by a backslash: #&;`|*?~<>^()[]{}$\, \x0A and \xFF. ' and " are escaped only if they are not paired. In Windows, all these characters plus % are replaced by a space instead.

So you are probably passing duff paths to pdf2text.exe

Removing escapeshellcmd worked for me. Just make darned sure you are in control of what is being passed through to your system call.
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0
kangaroo232002 at yahoo dot co dot uk
6 years ago
To extend alex's example earlier, you can use a couple of switches inside the pdf doc to give you the total number of pages, without using any ext. I would have added the whole code, however the site keeps on saying "line is too long... yadayada".

Open the doc using fopen("$file", "rb"); (for reading)

Test the first approx 1000b for the following regex
<?php
if(preg_match("/\/N\s+([0-9]+)/", $contents, $found)) {
    return
$found[1];
}
?>

If that doesn't return anything, you have to read the rest of the file:

<?php

preg_match_all
("/\/Type\s*\/Pages\s*\/Kids\s+
\[.*?\]\s*\/Count\s+([0-9]+)/"
);

?>

This may return more than one, so look through for the highest value, which is the total number of pages in your doc.
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0
brendandonhue at comcast dot net
7 years ago
Here is a function to test whether a file is a PDF without using any external library.
<?php
define
('PDF_MAGIC', "\\x25\\x50\\x44\\x46\\x2D");
function
is_pdf($filename) {
  return (
file_get_contents($filename, false, null, 0, strlen(PDF_MAGIC)) === PDF_MAGIC) ? true : false;
}
?>
It's not checking if the whole file is valid, just if the correct header is present at the beginning of the file.
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0
MAGnUm at magnumhome dot servehttp.com
7 years ago
domPDF is also a great PDF creation interface. it basically converts your code to CSS and then builds the PDF from that with the absolute positions, and what not...
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0
ontwerp AT zonnet.nl
8 years ago
I was searching for a lowcost/opensource option for combining static html files [as templates] and dynamic output from perl or php routines etc. And the sooner or later I found out that this was the most stable, 'speedest' and customizeable way to produce usable pdf 's with nice formatting :

1] create html page output [perl-> html output, direct html output from any app or php echo's etc. [sort these html files locally]

2] parse all html [inluding webimages links, tables font formatting etc] to [E]PS files with the perl app : html2ps [as mentioned beneath]
http://user.it.uu.se/~jan/html2ps.html [sort all ps files by future pdf page positions]

3] use the free ps2pdf/ps2pdfwr linux application
http://www.ps2pdf.com/convert/index.htm [uses gostscript, ghostview libs and so on etc]
Has great formatting options like headers, footers, numbering etc
[sort pdf files]

4] convert all pdf files to 1 pdf file with : pdftk [pdftoolkit], deliveres optional compressions/encryption, background stamps etc

One should ask why using different scripts :
- combination perl/php is great : perl is speedier at some issues like conversion to ps files in my experience
- ps to pdf is quickier then direct php to pdf [in my exp.!]
- I have total control over every files whenever i change html files as a template I use only editors or other app. for it [online or offline].

p.s. I had to make a opensource solution for creating simpel report analyses that's based on things like :
- first page [name / title / #/ date]
- some static info [like introduction, copyrights etc]
- some dynamic info [outputted from php->dbase queries] combined
with html tags/images etc.

And this all mixed [so seperated in files for transparancy]. Also the 3 way manner : data-> html, html->ps, ps->pdf, is easier and quickier to program or adjust in every step.

Correct me if i'm wrong [mail me to]

ing. Valentijn Langendorff
Design & Technologist
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0
ragnar at deulos dot com
8 years ago
After one hole day understanding how pdflib works i got the conclusion that its enough hard to draw just with words to furthermore for drawing a line maybe you will need something like four lines of code, so i did my own functions to do the life easier and the code more understable to modify and draw. I also made a function that will draw a rect with the corners round and the posibility even to fill it ;)

You can get it from http://www.deulos.com/pdf_php.php

feel free to make suggestions or whatever u like ;o)
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0
jorromer at uchile dot cl -- Krash
8 years ago
I recently use mattb code below for the extraction of text from PDF files. I modify this code for only extract text fields.

Hope i can help some one

Here is the Function

<?php

  $text
= pdf2string("file.pdf");
  echo
$text;

  function
pdf2string($sourcefile){
   
$fp = fopen($sourcefile, 'rb');
   
$content = fread($fp, filesize($sourcefile));
   
fclose($fp);

   
$searchstart = 'stream';
   
$searchend = 'endstream';
   
$pdfdocument = '';
   
$pos = 0;
   
$pos2 = 0;
   
$startpos = 0;
  
    while(
$pos !== false && $pos2 !== false ){
     
$pos = strpos($content, $searchstart, $startpos);
     
$pos2 = strpos($content, $searchend, $startpos + 1);
    
      if (
$pos !== false && $pos2 !== false){
        if (
$content[$pos]==0x0d && $content[$pos+1]==0x0a) $pos+=2;
        else if (
$content[$pos]==0x0a) $pos++;

        if (
$content[$pos2-2]==0x0d && $content[$pos2-1]==0x0a) $pos2-=2;
        else if (
$content[$pos2-1]==0x0a) $pos2--;

       
$textsection = substr($content, $pos + strlen($searchstart) + 2, $pos2 - $pos - strlen($searchstart) - 1);
       
$data = @gzuncompress($textsection);
       
$data = ExtractText2($data);
       
$startpos = $pos2 + strlen($searchend) - 1;
       
        if (
$data === false){
          return -
1;}
         
       
$pdfdocument .= $data;}}
   return
$pdfdocument;}

function
ExtractText2($postScriptData){
 
$sw = true;
 
$textStart = 0;
 
$len = strlen($postScriptData);

  while (
$sw){
   
$ini = strpos($postScriptData, '(', $textStart);
   
$end = strpos($postScriptData, ')', $textStart+1);
    if ((
$ini>0) && ($end>$ini)){
     
$valtext = strpos($postScriptData,'Tj',$end+1);
      if (
$valtext == $end + 2)
       
$text .= substr($postScriptData,$ini+1,$end - $ini - 1);}
     
   
$textStart = $end + 1;
    if (
$len<=$textStart) $sw=false;
   
    if ((
$ini == 0) && ($end == 0)) $sw=false;}
 
 
$trans = array("\\341" => "a","\\351" => "e","\\355" => "i","\\363" => "o","\\223" => "","\\224" => "");
 
$text  = strtr($text, $trans);
  return
$text;
}
?>
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0
webadmin at secretscreen dot com
9 years ago
I found this info about pdflib scope on a Chinese (I think) site and translated it.  I was trying to do pdf_setfont and kept getting the wrong scope error.  Turns out it has to be in the Page scope.  So pdf_setfont will only work when called between pdf_begin_page and pdf_end_page.

#########################################
When API of the PDFlib is called, the error, Can't - IN 'document' scope occurs
There is a concept of " the scope " in the PDFlib, as for all API of the PDFlib it is called with some scope, the *1 which is decided This error occurs when it is called other than the scope where API is appointed. The chart below in reference, please verify API call position.

Path: PDF_moveto (), PDF_circle (), PDF_arc (), PDF_arcn (), PDF_rect () in each case PDF_stroke (), PDF_closepath_stroke (), PDF_fill (), PDF_fill_stroke (), PDF_closepath_fill_stroke (), PDF_clip (), PDF_endpath () the between

Page: PDF_begin_page () with PDF_end_page () in between outside path 

Template: PDF_begin_template () with PDF_end_template () in between outside path 

Pattern: PDF_begin_pattern () with PDF_end_pattern () in between outside path 

Font: PDF_begin_font () with PDF_end_font () in between outside glyph 

Glyph: PDF_begin_glyph () with PDF_end_glyph () in between outside path 

Document: PDF_open_* () with PDF_close () in between outside page tempalte and pattern 

Object: The PDF_new () with the PDF_delete () it belongs to the other no scope in between the place

Null: Outside object 

Any: All scopes other than 

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

Hope this helps others as much as it helped me!!!
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0
chu61 dot tw at gmail dot com
9 years ago
How to get how many pages in a PDF? I read PDF spec. V1.6 and find this:

PDF set  a "Page Tree Node" to define the ordering of pages in the document. The tree structure allows PDF applications, using little memory to quickly open a document containing thousands of pages.

If a PDF have 63 pages, the page tree node will like this...

2 0 obj
<< /Type /Pages
    /Kidsn [ 4 0 R
               10 0 R
             ]
     /Count 63        <---- YES, got it
>>
endobj

[P.S]   a  PDF may not only a pages tree node, The right answer is in "root page tree node", if  /Count XX with  /Parent XXX node, it not "root page tree node"

SO, You must find the node with /Count XX and Without /Parent  terms, and you'll get total pages of PDF

%PDF-1.0  ~  %PDF-1.5 all works

Alex form Taipei,Taiwan
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0
bmironov at jonview dot com
10 years ago
RedHat 9 + Apache 2.0 + PHP 4.3.2 + Oracle 9i + PDFlib 5.0.1 (binary distribution)

It seems to be a working bundle if you do some magic with ./configure:

RedHat 9:
kernel-2.4.20-18.9

Apache 2.0.46:
./configure --enable-so --enable-rewrite=shared --enable-status --enable-mpm=prefork

PHP 4.3.2:
./configure \
--program-prefix= \
--prefix=/usr \
--exec-prefix=/usr \
--bindir=/usr/bin \
--sbindir=/usr/sbin \
--sysconfdir=/etc \
--datadir=/usr/share \
--includedir=/usr/include \
--libdir=/usr/lib \
--libexecdir=/usr/libexec \
--localstatedir=/var \
--sharedstatedir=/usr/com \
--mandir=/usr/share/man \
--infodir=/usr/share/info \
--with-config-file-path=/etc \
--with-config-file-scan-dir=/etc/php.d \
--without-tsrm-pthreads \    # !!!!!!!!!!!!!!!!!!!!
--with-zlib \
--with-gd \
--enable-gd-native-ttf \
--with-ttf \
--without-mysql \
--with-apxs2filter=/usr/local/apache2/bin/apxs \
--with-oci8 \
--enable-sigchild \
--enable-inline-optimization

Oracle9i:
ln -s $ORACLE_HOME/rdbms/public/nzerror.h $ORACLE_HOME/rdbms/demo/nzerror.h

ln -s $ORACLE_HOME/rdbms/public/nzt.h $ORACLE_HOME/rdbms/demo/nzt.h

ln -s $ORACLE_HOME/rdbms/public/ociextp.h $ORACLE_HOME/rdbms/demo/ociextp.h

If you want to use bundled GD-library then:
1) install following packages: libjpeg, libjpeg-devel, libpng, libpng-devel, freetype, freetype-devel, libtiff, libtiff-devel, zlib, zlib-devel

2) ln -s /usr/lib/libjpeg.so.62 /usr/lib/libjpeg.so
ln -s /usr/lib/libpng.so.62 /usr/lib/libpng.so

It seems to be a working combination, because it is NOT give you:
1) error message in Apache's error_log:
Module compiled with module API=20020429, debug=0, thread-safety=0
PHP compiled with module API=20020429, debug=0, thread-safety=1

2) error message in Apache's error_log:
[notice] child pid 12345 exit signal Segmentation fault (11)

3) MS Internet Explorer can show PDF-output from your PHP-script via Acrobat plug-in and does not crush. No confusing messages about opening "Adobe Acrobat Control for ActiveX".

Hope it will save you some time.

Good luck,
Boris
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0
pbierans at lynet dot de
12 years ago
Load extension, open a PDF, add a font, modify PDF in memory and send
it to browser:

<?php
 
// no cache headers:
 
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
 
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
 
header("Cache-Control: no-store, no-cache, must-revalidate");
 
header("Cache-Control: post-check=0, pre-check=0", false);
 
header("Pragma: no-cache");

 
$ext_name="libpdf_php.so";
   
// libpdf_php.so is the PDFLIB for SunOS by "PDFlib GmbH"
    // visit http://www.pdflib.com

  // if the extension is not automatically loaded by Apache
  // dl() will try to load it on demand:
 
if (!extension_loaded($ext_name) && !@dl($ext_name))
  {
   
?>
    <table width="100%" border="0"><tr><td align="center">
      <table style="border: solid #f0f0f0 2px;"><tr>
        <td valign="middle" style="padding: 20px; margin: 0px;">
          <p style="font-family: arial; font-size: 12px; ">
          <b>Sorry,</b><br>
          &nbsp;<br>
          A PDF can not be generated right now.<br>
          The administrator has been informed and will fix this as
          soon as possible.<br>
          Please try again later.
        </p>
      </td></tr></table>
    </td></tr></table>
    <?php
    mail
('admin@domain.com','Error: PDFLib not found',
        
'Called by script:\n  '.$SCRIPT_FILENAME.'?'.$QUERY_STRING,
        
"From: warnings@domain.com\n");
    exit;
  }
// verify that extension is usable

  // unique serial number:
 
srand(microtime()*10000);
 
$usnr= gmdate("Ymd-His-").rand(1000,9999).'-';
 
$pdf_file=$usnr.'result.pdf';
 
$src_file='source.pdf';

 
// create pdf object
 
$pdf = pdf_new();
 
pdf_open_file($pdf);
 
pdf_set_parameter($pdf, 'serial',      'if-you-have-one');

 
// fonts to embed, they are in the folder of this file:
 
pdf_set_parameter($pdf, 'FontAFM',     'TradeGothic=Tg______.afm');
 
pdf_set_parameter($pdf, 'FontOutline', 'TradeGothic=Tg______.pfb');
 
pdf_set_parameter($pdf, 'FontPFM',     'TradeGothic=Tg______.pfm');

 
// load the source file:
 
$src_doc   =pdf_open_pdi($pdf,$src_file,'', 0);
 
$src_page  =pdf_open_pdi_page($pdf,$src_doc,1,'');
 
$src_width =pdf_get_pdi_value($pdf,'width' ,$src_doc,$src_page,0);
 
$src_height=pdf_get_pdi_value($pdf,'height',$src_doc,$src_page,0);

 
pdf_begin_page($pdf, $src_width, $src_height);
  {
   
// place the sourcefile to the background of the actual page:
   
pdf_place_pdi_page($pdf,$src_page,0,0,1,1);
   
pdf_close_pdi_page($pdf,$src_page);

   
// modify the page:
   
pdf_set_font($pdf, 'TradeGothic', 8, 'host');
   
pdf_show_xy($pdf, 'Now: '.gmdate("Y-m-d H:i:s"),50,50);
  }
 
pdf_end_page($pdf);
 
pdf_close($pdf);

 
// prepare output:
 
$pdfdata = pdf_get_buffer($pdf); // to echo the pdf-data
 
$pdfsize = strlen($pdfdata);     // IE requires the datasize

  // real datatype headers:
 
header('Content-type: application/pdf');
 
header('Content-disposition: attachment; filename="'.$pdf_file.'"');
 
header('Content-length: '.$pdfsize);
  echo
$pdfdata;
  exit;
// keep this one so no #13#10 or #32 will be written
?>
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-1
sebastien at malot dot fr
5 months ago
Hi,

I post this comment here because I always wanted to extract text from PDF files, but I never found it.
So now, I spread my tresor.

So spend much time in creating a PHP library to extract text from pages.
Based on TCPDF parser class, now my lib can handle many cases such as multiple charset encoding, base64 and octal encoding ...

Project webiste : http://www.pdfparser.org

<?php

// Include Composer autoloader if not already done.
include 'vendor/autoload.php';
 
// Parse pdf file and build necessary objects.
$parser = new \Smalot\PdfParser\Parser();
$pdf    = $parser->parseFile('document.pdf');
 
// Retrieve all pages from the pdf file.
$pages  = $pdf->getPages();
 
// Loop over each page to extract text.
foreach ($pages as $page) {
    echo
$page->getText();
}

?>

Don't hesitate to report any bug on github issue report tool.

Thanks
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-1
shajacse786 at gmail dot com (Mansoor H)
8 months ago
How to read hyperlink on PDF File from web URL using PHP v5.3?
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-1
spingary at yahoo dot com
8 years ago
I was having trouble with streaming inline PDf's using PHP 5.0.2, Apache 2.0.54.

This is my code:

<?
header("Pragma: public");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: must-revalidate");
header("Content-type: application/pdf");
header("Content-Length: ".filesize($file));
header("Content-disposition: inline; filename=$file");
header("Accept-Ranges: ".filesize($file));
readfile($file);
exit();
?>
It would work fine in Mozilla Firefox (1.0.7) but with IE (6.0.2800.1106) it would not bring up the Adobe Reader plugin and instead ask me to save it or open it as a PHP file.

Oddly enough, I turned off ZLib.compression and it started working.  I guess the compression is confusing IE.  I tried leaving out the content-length header thinking maybe it was unmatched filesize (uncompressed number vs actual received compressed size), but then without it it screws up Firefox too. 

What I ended up doing was disabling Zlib compression for the PDF output pages using ini_set:

<?
ini_set('zlib.output_compression','Off');
?>

Maybe this will help someone. Will post over in the PDF section as well.
up
-1
michi (Alt+Q) marel.at
9 years ago
<?PHP
/* A little helpful function to calculate millimeters to points */
function calcToPt($intMillimeter) {
 
$intPoints = ($intMillimeter*72)/25.4;
 
$intPoints = round($intPoints);
  return
$intPoints;
}

/* For example: Create DIN A4 210x297 mm */
pdf_begin_page( $pdf, calcToPt(210), calcToPt(297)); // 595x842 pt
?>
up
-1
luc at phpt dot org
7 years ago
I am trying to extract the text from PDF files and use it to feed a search engine (Intranet tool). I tried several functions "PDF2TXT" posted below, but not they do not produce the expected result. At least, all words need to be separated by spaces (then used as keywords), and the "junk" codes removed (for example: binary data, pictures...). I start modifying the interesting function posted by Swen, and here is the my current version that starts to work quite well (with PDF version 1.2). Sorry for having a quite different style of programming. Luc

<?php
// Patch for pdf2txt() posted Sven Schuberth
// Add/replace following code (cannot post full program, size limitation)

// handles the verson 1.2
// New version of handleV2($data), only one line changed
function handleV2($data){
       
   
// grab objects and then grab their contents (chunks)
   
$a_obj = getDataArray($data,"obj","endobj");
   
    foreach(
$a_obj as $obj){
       
       
$a_filter = getDataArray($obj,"<<",">>");
   
        if (
is_array($a_filter)){
           
$j++;
           
$a_chunks[$j]["filter"] = $a_filter[0];

           
$a_data = getDataArray($obj,"stream\r\n","endstream");
            if (
is_array($a_data)){
               
$a_chunks[$j]["data"] = substr($a_data[0],
       
strlen("stream\r\n"),
       
strlen($a_data[0])-strlen("stream\r\n")-strlen("endstream"));
            }
        }
    }

   
// decode the chunks
   
foreach($a_chunks as $chunk){

       
// look at each chunk and decide how to decode it - by looking at the contents of the filter
       
$a_filter = split("/",$chunk["filter"]);
       
        if (
$chunk["data"]!=""){
           
// look at the filter to find out which encoding has been used           
           
if (substr($chunk["filter"],"FlateDecode")!==false){
               
$data =@ gzuncompress($chunk["data"]);
                if (
trim($data)!=""){
           
// CHANGED HERE, before: $result_data .= ps2txt($data);   
                   
$result_data .= PS2Text_New($data);
                } else {
               
                   
//$result_data .= "x";
               
}
            }
        }
    }
    return
$result_data;
}

// New function - Extract text from PS codes
function ExtractPSTextElement($SourceString)
{
$CurStartPos = 0;
while ((
$CurStartText = strpos($SourceString, '(', $CurStartPos)) !== FALSE)
    {
   
// New text element found
   
if ($CurStartText - $CurStartPos > 8) $Spacing = ' ';
    else    {
       
$SpacingSize = substr($SourceString, $CurStartPos, $CurStartText - $CurStartPos);
        if (
$SpacingSize < -25) $Spacing = ' '; else $Spacing = '';
        }
   
$CurStartText++;

   
$StartSearchEnd = $CurStartText;
    while ((
$CurStartPos = strpos($SourceString, ')', $StartSearchEnd)) !== FALSE)
        {
        if (
substr($SourceString, $CurStartPos - 1, 1) != '\\') break;
       
$StartSearchEnd = $CurStartPos + 1;
        }
    if (
$CurStartPos === FALSE) break; // something wrong happened
   
    // Remove ending '-'
   
if (substr($Result, -1, 1) == '-')
        {
       
$Spacing = '';
       
$Result = substr($Result, 0, -1);
        }

   
// Add to result
   
$Result .= $Spacing . substr($SourceString, $CurStartText, $CurStartPos - $CurStartText);
   
$CurStartPos++;
    }
// Add line breaks (otherwise, result is one big line...)
return $Result . "\n";
}

// Global table for codes replacement
$TCodeReplace = array ('\(' => '(', '\)' => ')');

// New function, replacing old "pd2txt" function
function PS2Text_New($PS_Data)
{
global
$TCodeReplace;

// Catch up some codes
if (ord($PS_Data[0]) < 10) return '';
if (
substr($PS_Data, 0, 8) == '/CIDInit') return '';

// Some text inside (...) can be found outside the [...] sets, then ignored
// => disable the processing of [...] is the easiest solution

$Result = ExtractPSTextElement($PS_Data);

// echo "Code=$PS_Data\nRES=$Result\n\n";

// Remove/translate some codes
return strtr($Result, $TCodeReplace);
}

?>
up
-1
Mansoor H
8 months ago
How to read pdf file hyperlinks using php?
up
-1
donatas at spurgius dot com
9 years ago
I've been looking for a way to extract plain text from PDF documents (needed to search for text inside 'em). Not being able to find one I wrote the needed functions myself. here you go folks.

<?php
 
function pdf2string ($sourceFile)
  {
   
$textArray = array ();
   
$objStart = 0;
   
   
$fp = fopen ($sourceFile, 'rb');
   
$content = fread ($fp, filesize ($sourceFile));
   
fclose ($fp);
   
   
$searchTagStart = chr(13).chr(10).'stream';
   
$searchTagStartLenght = strlen ($searchTagStart);
   
    while (((
$objStart = strpos ($content, $searchTagStart, $objStart)) && ($objEnd = strpos ($content, 'endstream', $objStart+1))))
    {
     
$data = substr ($content, $objStart + $searchTagStartLenght + 2, $objEnd - ($objStart + $searchTagStartLenght) - 2);
     
$data = @gzuncompress ($data);
     
      if (
$data !== FALSE && strpos ($data, 'BT') !== FALSE && strpos ($data, 'ET') !== FALSE)
      {
       
$textArray [] = ExtractText ($data);
      }
     
     
$objStart = $objStart < $objEnd ? $objEnd : $objStart + 1;
    }
   
    return
$textArray;
  }
 
  function
ExtractText ($postScriptData)
  {
    while (((
$textStart = strpos ($postScriptData, '(', $textStart)) && ($textEnd = strpos ($postScriptData, ')', $textStart + 1)) && substr ($postScriptData, $textEnd - 1) != '\\'))
    {
     
$plainText .= substr ($postScriptData, $textStart + 1, $textEnd - $textStart - 1);
      if (
substr ($postScriptData, $textEnd + 1, 1) == ']') //this adds quite some additional spaces between the words
     
{
       
$plainText .= ' ';
      }
     
     
$textStart = $textStart < $textEnd ? $textEnd : $textStart + 1;
    }
   
    return
stripslashes ($plainText);
  }
?>
up
-2
bondo2 at bondo2 dot info
5 years ago
<?php

//getting new instance
$pdfFile = new_pdf();

PDF_open_file($pdfFile, " ");

//document info
pdf_set_info($pdfFile, "Auther", "Ahmed Elbshry");
pdf_set_info($pdfFile, "Creator", "Ahmed Elbshry");
pdf_set_info($pdfFile, "Title", "PDFlib");
pdf_set_info($pdfFile, "Subject", "Using PDFlib");

//starting our page and define the width and highet of the document
pdf_begin_page($pdfFile, 595, 842);

//check if Arial font is found, or exit
if($font = PDF_findfont($pdfFile, "Arial", "winansi", 1)) {
   
PDF_setfont($pdfFile, $font, 12);
} else {
    echo (
"Font Not Found!");
   
PDF_end_page($pdfFile);
   
PDF_close($pdfFile);
   
PDF_delete($pdfFile);
    exit();
}

//start writing from the point 50,780
PDF_show_xy($pdfFile, "This Text In Arial Font", 50, 780);
PDF_end_page($pdfFile);
PDF_close($pdfFile);

//store the pdf document in $pdf
$pdf = PDF_get_buffer($pdfFile);
//get  the len to tell the browser about it
$pdflen = strlen($pdfFile);

//telling the browser about the pdf document
header("Content-type: application/pdf");
header("Content-length: $pdflen");
header("Content-Disposition: inline; filename=phpMade.pdf");
//output the document
print($pdf);
//delete the object
PDF_delete($pdfFile);
?>
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