如何使用PHP密码保护上传的PDF [英] How to password protect an uploaded PDF in PHP
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问题描述
我有一个Web应用程序,用户可以在其中上传PDF文档.是否可以使用PHP库对PDF文件进行密码保护?我需要该库来保留原始PDF的所有方面(即大小,字体,分辨率等).
I have a web application where users can upload PDF documents. Is there a PHP library that I can use to password protect the PDF file? I need the library to preserve all aspects of the original PDF (i.e. size, fonts, resolution, etc).
推荐答案
<?php
function pdfEncrypt ($origFile, $password, $destFile){
//include the FPDI protection http://www.setasign.de/products/pdf-php-solutions/fpdi-protection-128/
require_once('fpdi/FPDI_Protection.php');
$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);
$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 );
?>
编辑 使用的原始图书馆资源.请注意,我上面的答案未使用原始来源的脚本进行过测试.我是从上面的第三方链接下载的,但没有检查它们是否完全相同.
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.
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