How to password protect an uploaded PDF in PHP [closed]

Answer 1

Download the library used: Protect PDF in PHP

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);
    $pdf->addPage();
    $pdf->useTemplate($tplidx);
}

// 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
$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 );
?>

EDIT Original source of library used. Please note that my answer above was not tested using the script from the original source. I downloaded from the third party link above and I didn't check if they're exactly the same.