PHP Extension Requires Chilkat v11.7.0+

Extract Text from a PDF that Forbids Copying

See more PDF Text Extraction Examples

Demonstrates a PDF that opens without a password but whose permissions do not allow copying text. The "text", "markdown", "search" and "tables" operations fail with that reason; "assess" always works. Loading the PDF with the OwnerPassword property set grants owner rights, and extraction works. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

//  The PDF used in this example (owner password: owner-secret; copying not permitted) is available at no_copy_permission.pdf

$pdf = new CkPdf();
$json = new CkJsonObject();
$jsonOut = new CkJsonObject();

//  The PDF opens without a password.
$success = $pdf->LoadFile('qa_data/pdf/no_copy_permission.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

//  Extracting text is refused, because the PDF's permissions do not allow copying.
$success = $pdf->ExtractText('text',$json,$jsonOut);
if ($success == false) {
    print 'Extraction refused: ' . $pdf->lastErrorText() . "\n";
}

//  "assess" reports only counts and ratings, never text, so it is always allowed.
$success = $pdf->ExtractText('assess',$json,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print 'rating: ' . $jsonOut->stringOf('quality.rating') . "\n";

//  Load with the owner password to get owner rights, which include copying.
$pdf->put_OwnerPassword('owner-secret');
$success = $pdf->LoadFile('qa_data/pdf/no_copy_permission.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

$success = $pdf->ExtractText('text',$json,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print $jsonOut->stringOf('text') . "\n";

//  Sample output:

//  Extraction refused: ChilkatLog:
//    ExtractText:
//      ...
//        The PDF's permissions do not allow copying or extracting text (load it with the owner password to extract).
//      ...
//  rating: good
//  Visitor Leaflet
//  
//  Welcome to the harbor lighthouse. The tower is open on weekends from July to September.
//  
//  Please keep to the marked paths and do not climb on the breakwater.
//  
//  The lantern room is closed in high winds.

?>