[wirehopper]

I like xpdf

Xpdf: Download
http://snipplr.com/view/22825/count-...ages-in-a-pdf/

[adrianbj]

PDF1.5
http://ian.umces.edu/pdfs/ian_presen...1124145318.pdf

I have tried saving as different versions, even extracting pages and recombining to make a new pdf - can't seem to get page count tags into it.

Any help figuring this out would be great.

[Baboum]

I tried adding this to count the number of 'Type/Page' appearing in the document, and that worked until I tried with you document :

PHP Code:

    if ($max===0){

            if ($fp = @fopen($file,"r")) {   

            while(!feof($fp)) {

                $line = fgets($fp,255);

                if (preg_match('/\/Type\/Page/', $line)) $max++;

            }    

            fclose($fp);

        }

    }

    return $max; 

That returned 28 pages instead of 16. So I just had a look at Count The Number of Pages in a PDF - PHP - Snipplr (thanks wirehopper ) and the first message gave me the solution (using Ubuntu Karmic) :

PHP Code:

exec('pdfinfo '.$file.' | awk \'/Pages/ {print $2}\''); 

It worked perfectly on your document. I will keep this one. Simple, fast and efficient.

[adrianbj]

I actually went with a combined approach. Since I have exec disabled on my server I wanted to stick with a PHP based solution, so ended up with this:

Code:

function getNumPagesPdf($filepath){
	$fp = @fopen(preg_replace("/\[(.*?)\]/i", "",$filepath),"r");
	$max=0;
	while(!feof($fp)) {
			$line = fgets($fp,255);
			if (preg_match('/\/Count [0-9]+/', $line, $matches)){
					preg_match('/[0-9]+/',$matches[0], $matches2);
					if ($max<$matches2[0]) $max=$matches2[0];
			}
	}
	fclose($fp);
	if($max==0){
		$im = new imagick($filepath);
		$max=$im->getNumberImages();
	}
	
	return $max;
}

If it can't figure things out because there are no Count tags, then it uses the imagick php extension. The reason I do a two-fold approach is because the latter is quite slow.

[Baboum]

I confirm that the Imagemagick solution is quite slow. That's why I didn't use it. I fear that too much users using it at the same time might crash my server .

[adrianbj]

Agreed, it is very slow, but also very effective, so I ended up using this code at the time the PDF is uploaded via my CMS. The result is then stored in the database along with all the other data about the file. Should circumvent any speed/load issues.

[adrianbj]

Just wanted to add that unfortunately the "preg_match('/\/Count [0-9]+/', $line, $matches" approach actually mis-reports sometimes, so you cannot rely on my two-fold approach. Even if it returns a number other than zero, it does not mean it is going to be correct. It usually is, but I have had at least half a dozen time now when it has been wrong. Sometimes off by only a few, but other times not even close!

[adrianbj]

imagemagick really did end up being too slow on PDFs with hundreds of pages, so I have FPDI a go and it seems quick and accurate so far. I used it with tcpdf since I am already using that, rather than FPDF, which is the default. Don't forget that you will also need FPDF_TPL. You can get both from here:
http://www.setasign.de/products/pdf-.../fpdi/fpdi.php

require_once('../../tcpdf/tcpdf.php');
require_once('../../fpdi/fpdi.php');

$pdf =& new FPDI();

$pagecount = $pdf->setSourceFile($filepath);
return $pagecount;