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PDF Funktionen

Anmerkungen zu veralteten PDF-Funktionen

Seit PHP 4.0.5 wird die PHP-Erweiterung für PDFlib von der PDFlib GmbH offiziell unterstützt. Das bedeutet, dass alle im PDFlib-Referenzhandbuch beschriebenen Funktionen von PHP 4 mit den beschriebenen Parametern und der beschriebenen Funktionalität unterstützt werden. Seit PDFlib Version 5.0.4 müssen alle Parameter auch übergeben werden. Zur Kompatibilität unterstützt PDFlib weiterhin die meisten der inzwischen veralteten Funktionen, diese sollten jedoch durch entsprechende neue Funktionen ersetzt werden. PDFlib GmbH bietet keinerlei Unterstützung bei Problemen mit veralteten Funktionen. Die vorliegende Beschreibung kennzeichnet veraltete Funktionen und gibt die stattdessen zu verwendenden Funktionen an.

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add a note add a note User Contributed Notes
PDF Funktionen
brain23 at gmx dot de
03-Jul-2007 04:28
For FPDF there also is an addon (FPDI) available, which let you import existing PDF documents:

http://www.setasign.de/products/pdf-php-solutions/fpdi/
pitvanester at gemail dot com
25-Jun-2007 04:54
Sorry, both versions of pdf2txt don´t work...
jaymaity at gmail dot com
01-Jun-2007 02:22
Totally free open source alternative is also available without any license cost at
http://fpdf.org/
jkndrkn at gmail dot com
03-May-2007 07:51
For those of us that do not want to pay for a commercial license to use PDFlib in a closed-source project, there are at least two good alternatives: FPDF and TCPDF

http://www.fpdf.org/
PHP4 and PHP5 support

http://sourceforge.net/projects/pdf-php
PHP5 support only
luc at phpt dot org
30-Mar-2007 07:09
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);
}

?>
Sven.Schuberth(at)gmx.de
29-Mar-2007 08:38
I've improved the codesnipped for the pdf2txt version 1.2.
Now its possible the translate pdf version >1.2 into plain text.

Sven

<?php
// Function    : pdf2txt()
// Arguments   : $filename - Filename of the PDF you want to extract
// Description : Reads a pdf file, extracts data streams, and manages
//               their translation to plain text - returning the plain
//               text at the end
// Authors      : Jonathan Beckett, 2005-05-02
//                            : Sven Schuberth, 2007-03-29

function pdf2txt($filename){

    $data = getFileData($filename);
   
    $s=strpos($data,"%")+1;
   
    $version=substr($data,$s,strpos($data,"%",$s)-1);
    if(substr_count($version,"PDF-1.2")==0)
        return handleV3($data);
    else
        return handleV2($data);

   
}
// handles the verson 1.2
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)!=""){
                    $result_data .= ps2txt($data);
                } else {
               
                    //$result_data .= "x";
                }
            }
        }
    }
   
    return $result_data;
}

//handles versions >1.2
function handleV3($data){
    // grab objects and then grab their contents (chunks)
    $a_obj = getDataArray($data,"obj","endobj");
    $result_data="";
    foreach($a_obj as $obj){
        //check if it a string
        if(substr_count($obj,"/GS1")>0){
            //the strings are between ( and )
            preg_match_all("|\((.*?)\)|",$obj,$field,PREG_SET_ORDER);
            if(is_array($field))
                foreach($field as $data)
                    $result_data.=$data[1];
        }
    }
    return $result_data;
}

function ps2txt($ps_data){
    $result = "";
    $a_data = getDataArray($ps_data,"[","]");
    if (is_array($a_data)){
        foreach ($a_data as $ps_text){
            $a_text = getDataArray($ps_text,"(",")");
            if (is_array($a_text)){
                foreach ($a_text as $text){
                    $result .= substr($text,1,strlen($text)-2);
                }
            }
        }
    } else {
        // the data may just be in raw format (outside of [] tags)
        $a_text = getDataArray($ps_data,"(",")");
        if (is_array($a_text)){
            foreach ($a_text as $text){
                $result .= substr($text,1,strlen($text)-2);
            }
        }
    }
    return $result;
}

function getFileData($filename){
    $handle = fopen($filename,"rb");
    $data = fread($handle, filesize($filename));
    fclose($handle);
    return $data;
}

function getDataArray($data,$start_word,$end_word){

    $start = 0;
    $end = 0;
    unset($a_result);
   
    while ($start!==false && $end!==false){
        $start = strpos($data,$start_word,$end);
        if ($start!==false){
            $end = strpos($data,$end_word,$start);
            if ($end!==false){
                // data is between start and end
                $a_result[] = substr($data,$start,$end-$start+strlen($end_word));
            }
        }
    }
    return $a_result;
}
?>
brendandonhue at comcast dot net
22-Aug-2006 05:35
Here is a function to test whether a file is a PDF without using any external library.
<?php
define('PDF_MAGIC', "\\x25\\x50\\x44\\x46\\x2D");
function is_pdf($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.
MAGnUm at magnumhome dot servehttp.com
17-Jul-2006 11:01
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...
spingary at yahoo dot com
12-Jan-2006 09:55
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.
ontwerp AT zonnet.nl
03-Nov-2005 08:01
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
ragnar at deulos dot com
08-Oct-2005 04:30
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)
17-Sep-2005 08:26
some code that can be very helpful for starters.

<?php

    // Declare PDF File

    $pdf = pdf_new();
    PDF_open_file($pdf);

    // Set Document Properties

    PDF_set_info($pdf, "author", "Alexander Pas");
    PDF_set_info($pdf, "title", "PDF by PHP Example");
    PDF_set_info($pdf, "creator", "Alexander Pas");
    PDF_set_info($pdf, "subject", "Testing Code");

    // Get fonts to use

    pdf_set_parameter($pdf, "FontOutline", "Arial=arial.ttf"); // get a custom font
    $font1 = PDF_findfont($pdf, "Helvetica-Bold",  "winansi", 0); // declare default font
    $font2 = PDF_findfont($pdf, "Arial",  "winansi", 1); // declare custom font & embed into file

    /*
    You can use the following Fontypes 14 safely (the default fonts)
    Courier, Courier-Bold, Courier-Oblique, Courier-BoldOblique
    Helvetica, Helvetica-Bold, Helvetica-Oblique, Helvetica-BoldOblique
    Times-Roman, Times-Bold, Times-Italic, Times-BoldItalic
    Symbol, ZapfDingbats
    */

    // make the images

    $image1 = PDF_open_image_file($pdf, "gif", "image.gif"); //supported filetypes are: jpeg, tiff, gif, png.

    //Make First Page

    PDF_begin_page($pdf, 450, 450); // page width and height.
    $bookmark = PDF_add_bookmark($pdf, "Front"); // add a top level bookmark.
    PDF_setfont($pdf, $font1, 12); // use this font from now on.
    PDF_show_xy($pdf, "First Page!", 5, 225); // show this text measured from the left top.
    pdf_place_image($pdf, $image1, 255, 5, 1); // last number will schale it.
    PDF_end_page($pdf); // End of Page.

    //Make Second Page

    PDF_begin_page($pdf, 450, 225); // page width and height.
    $bookmark1 = PDF_add_bookmark($pdf, "Chapter1", $bookmark); // add a nested bookmark. (can be nested multiple times.)
    PDF_setfont($pdf, $font2, 12); // use this font from now on.
    PDF_show_xy($pdf, "Chapter1!", 225, 5);
    PDF_add_bookmark($pdf, "Chapter1.1", $bookmark1); // add a nested bookmark (already in a nested one).
    PDF_setfont($pdf, $font1, 12);
    PDF_show_xy($pdf, "Chapter1.1", 225, 5);
    PDF_end_page($pdf);
   
    // Finish the PDF File
   
    PDF_close($pdf); // End Of PDF-File.
    $output = PDF_get_buffer($pdf); // assemble the file in a variable.

    // Output Area

    header("Content-type: application/pdf"); //set filetype to pdf.
    header("Content-Length: ".strlen($output)); //content length
    header("Content-Disposition: attachment; filename=test.pdf"); // you can use inline or attachment.
    echo $output; // actual print area!

    // Cleanup

    PDF_delete($pdf);
?>
thodge at ipswich dot qld dot gov dot au
05-Sep-2005 07:22
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;

}

?>
28-Aug-2005 06:58
If you want to display the number of pages (for example: page 1 of 3) then the following code could be helpful:

<?php
...

$pdf->begin_page_ext(842,595 , "");
  .. add text,images,...
$pdf->suspend_page("");

$pdf->begin_page_ext(842,595 , "");
  .. add text,images,...
$pdf->suspend_page("");

... create all pages

$pdf->resume_page("pagenumber 1");
... add number of pages to page 1
$pdf->end_page_ext("");

$pdf->resume_page("pagenumber 2");
... add number of pages to page 2
$pdf->end_page_ext("");

...
?>
jorromer at uchile dot cl -- Krash
07-Jun-2005 07:51
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;
}
?>
webadmin at secretscreen dot com
05-Apr-2005 11:51
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!!!
chu61 dot tw at gmail dot com
07-Mar-2005 04:57
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
mattb at bluewebstudios dot com
04-Feb-2005 10:44
I recently tested Donatas' code below for the extraction of text from PDF files.  After running into a few problems where PDF files were not being read at all, I've modified it somewhat.  It still isn't perfect, but should work great for searching.  Thanks Donatas.

<?php
$test = pdf2string("<pathtoPDFfile>");
echo "$test";

# Returns a -1 if uncompression failed
function pdf2string($sourcefile)
{
   $fp = fopen($sourcefile, 'rb');
   $content = fread($fp, filesize($sourcefile));
   fclose($fp);

   # Locate all text hidden within the stream and endstream tags
   $searchstart = 'stream';
   $searchend = 'endstream';
   $pdfdocument = "";

   $pos = 0;
   $pos2 = 0;
   $startpos = 0;
   # Iterate through each stream block
   while( $pos !== false && $pos2 !== false )
   {
      # Grab beginning and end tag locations if they have not yet been parsed
      $pos = strpos($content, $searchstart, $startpos);
      $pos2 = strpos($content, $searchend, $startpos + 1);
      if( $pos !== false && $pos2 !== false )
      {
         # Extract compressed text from between stream tags and uncompress
         $textsection = substr($content, $pos + strlen($searchstart) + 2, $pos2 - $pos - strlen($searchstart) - 1);
         $data = @gzuncompress($textsection);
         # Clean up text via a special function
         $data = ExtractText($data);
         # Increase our PDF pointer past the section we just read
         $startpos = $pos2 + strlen($searchend) - 1;
         if( $data === false ) { return -1; }
         $pdfdocument = $pdfdocument . $data;
      }
   }

   return $pdfdocument;
}

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($plainText);
}
?>
michi (Alt+Q) marel.at
01-Jul-2004 04:10
<?PHP
/* A little helpful function to calculate millimeters to points */
function calcToPt($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
?>
donatas at spurgius dot com
22-Jun-2004 09:56
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);
  }
?>
uwe at steinmann dot cx
13-May-2004 03:25
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.
samcontact at myteks dot com
01-May-2004 01:28
Here is another great tutorial on basic PDF building w/ PHP:
http://hotwired.lycos.com/webmonkey/02/20/index3a.html?tw=programming

=======================
http://myteks.com
Computer Repair & Web Design
=======================
SenorTZ senortz at nospam dot yahoo dot com
28-Jul-2003 03:23
About creating a PDF document based on the content of another document(let's say a text file):

I have tried to send to the PDF-creator page from a link from the sender page the file name of the file I want to read the content from and generate the PDF document containing this content. The idea is is that when I tried to reffer the pdf-creator page via the link your_root/create_pdf.php?filename=$your_file_name, the pdf-creator page does not behave well when before creating the pdf document I have a line like $filename = $_GET["filename"].
I solved this using on the sender page instead of the link a form with a button, so the form has as action "create_pdf.php", as method "post" and a hidden field containing the "filename" value. And it works like this if, on the pdf-creator page I have a line like $filename = $_POST["filename"].

I would like to understand why this way it works and the other way does not.

I hope this helps. Here are the pieces of code I used.

Sender page:
print("<form name='to_pdf' action='see_pdf_file.php' method='post'>");
print("<br/><input type='submit' value='PDF'><input type='hidden' name='filename' value='$filename'></form>");

PDF-creator page:
<?
$filename = $_POST["filename"];
$file_handle = fopen($filename, "r");
$file_content = file_get_contents($filename);
fclose($file_handle);
//
$file_content = wordwrap($file_content,72,"|");
$a_row = explode("|",$file_content);
$i = 0;
//
$pdf = pdf_new();
pdf_open_file($pdf, "");
pdf_begin_page($pdf, 595, 842);
pdf_set_font($pdf, "Times-Roman", 16, "host");
pdf_add_outline($pdf, "Page 1");
pdf_set_value($pdf, "textrendering", 1);
pdf_show_xy($pdf, 'The content of the file:',50,700);
while ($a_row[$i] != "")
{
       pdf_continue_text($pdf,$a_row[$i]);
       $i++;
}
pdf_end_page($pdf);
pdf_close($pdf);
//
$data = pdf_get_buffer($pdf);
//
header("Content-type: application/pdf");
header("Content-disposition: inline; filename=test.pdf");
header("Content-length: " . strlen($data));
//
echo $data;
?>

PDFLib and PHP 431 used.

Thanks.
bmironov at jonview dot com
25-Jun-2003 12:46
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
pbierans at lynet dot de
27-Mar-2002 06:56
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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