如何創建受密碼保護的pdf文件

Question

我正在使用html2fpdf創建PDF文檔。現在，一旦我創建了該文件，我想確保PDF文件受密碼保護。這怎麼能在PHP中完成？

Answer 1

下載我從a blog post on the ID Security Suite site使用庫：我得到這個it..Try一個我張貼這裏的答案

<?php 
    function pdfEncrypt ($origFile, $password, $destFile){ 
     require_once('FPDI_Protection.php'); 
     $pdf =& new FPDI_Protection(); 
     $pdf->FPDF('P', 'in'); 
     //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 (I suggest using the email adress of the purchaser). 
    $password = "testpassword"; 
    //Name of the original file (unprotected). 
    $origFile = "sample.pdf"; 
    //Name of the destination file (password protected and printing rights removed). 
    $destFile ="sample_protected.pdf"; 
    //Encrypt the book and create the protected file. 
    pdfEncrypt($origFile, $password, $destFile); 
?> 

Answer 2

我從來沒有找到一個直接的PHP解決這個問題。我最終使用pdftk並使用shell_exec()在生成/上傳PDF文件後調用二進制文件。

它接受一個語法如下：

pdftk 'inputfile.pdf' output 'outputfile.pdf' user_pw pass1234 owner_pw pass4321