PHP ActiveX Requires Chilkat v11.0.0+

PDF Get Encryption and Permissions Information

See more PDF Signatures Examples

Determine if a PDF is encrypted, and the associated user permissions.

Note: Some PDFs are encrypted but not password-protected. In such cases, encryption is used primarily for preventing unauthorized modifications to the document, but it doesn't restrict access. Therefore, you can open and read the document without a password.

PHP ActiveX

<?php

$success = 0;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

$pdf = new COM("Chilkat.Pdf");

//  Load a PDF.
$success = $pdf->LoadFile('c:/someDir/sample.pdf');
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

//  Get information about the PDF that was collected in the call to LoadFile.
$ljd = new COM("Chilkat.JsonObject");
$pdf->GetLastJsonData($ljd);

$ljd->EmitCompact = 0;

print $ljd->emit() . "\n";

//  Sample output:

//  {
//    "pdfVersion": "1.6",
//    "encrypt": {
//      "filter": "/Standard",
//      "keyLength": 128,
//      "V": 4,
//      "R": 4,
//      "P": -1340,
//      "perm": {
//        "printLowResolution": "allowed",
//        "printHighResolution": "allowed",
//        "modifyOther": "not allowed",
//        "modifyAnnotations": "allowed",
//        "modifyForms": "not allowed",
//        "fillInForms": "allowed",
//        "assembleDoc": "allowed",
//        "extractAnyPurpose": "not allowed",
//        "extractAccessibility": "not allowed"
//      },
//      "method": "AESV2"
//    }
//  }

//  Use this online tool to generate parsing code from sample JSON: 
//  Generate Parsing Code from JSON

$pdfVersion = $ljd->stringOf('pdfVersion');
$Filter = $ljd->stringOf('encrypt.filter');
$KeyLength = $ljd->IntOf('encrypt.keyLength');
$V = $ljd->IntOf('encrypt.V');
$R = $ljd->IntOf('encrypt.R');
$P = $ljd->IntOf('encrypt.P');
$PrintLowResolution = $ljd->stringOf('encrypt.perm.printLowResolution');
$PrintHighResolution = $ljd->stringOf('encrypt.perm.printHighResolution');
$ModifyOther = $ljd->stringOf('encrypt.perm.modifyOther');
$ModifyAnnotations = $ljd->stringOf('encrypt.perm.modifyAnnotations');
$ModifyForms = $ljd->stringOf('encrypt.perm.modifyForms');
$FillInForms = $ljd->stringOf('encrypt.perm.fillInForms');
$AssembleDoc = $ljd->stringOf('encrypt.perm.assembleDoc');
$ExtractAnyPurpose = $ljd->stringOf('encrypt.perm.extractAnyPurpose');
$ExtractAccessibility = $ljd->stringOf('encrypt.perm.extractAccessibility');
$Method = $ljd->stringOf('encrypt.method');

?>