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Password protect a PDF document in PHP

07 Oct 2008
 by Cristina Mailat | in: News, Security

Check bellow the solution I found for on the fly protecting a PDF file in PHP. For resolving this problem I wanted a FREE library. Download the library used: Protect PDF in PHP from and use the code bellow for password protect a PDF file using PHP.


function pdfEncrypt ($origFile, $password, $destFile){
//include the FPDI protection http://www.setasign.de/products/pdf-php-solutions/fpdi-protection-128/

$pdf =& new FPDI_Protection();
// set the format of the destinaton file, in our case 6×9 inch
$pdf->FPDF(‘P’, ‘in’, array(’6′,’9′));

//calculate the number of pages from the original document
$pagecount = $pdf->setSourceFile($origFile);

// copy all pages from the old unprotected pdf in the new one
for ($loop = 1; $loop <= $pagecount; $loop++) {
$tplidx = $pdf->importPage($loop);

// protect the new pdf file, and allow no printing, copy etc and leave only reading allowed
$pdf->SetProtection(array(), $password, ”;
$pdf->Output($destFile, ‘F’);

return $destFile;

//password for the pdf file (I suggest using the email adress of the purchaser)
$password = “info@domain.com”;

//name of the original file (unprotected)
$origFile = “book.pdf”;

//name of the destination file (password protected and printing rights removed)
$destFile =“book_protected.pdf”;

//encrypt the book and create the protected file
pdfEncrypt($origFile, $password, $destFile );

Published: 07 Oct 2008  by Cristina Mailat, in: News, Security Tags: , , RSS feed for comments on this post.

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