PHP Requires Chilkat v11.7.0+

Extract Text from a PDF that Forbids Copying

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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. Chilkat2 PHP

<?php

use Chilkat2\JsonObject;
use Chilkat2\Pdf;

// 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 Pdf();
$json = new JsonObject();
$jsonOut = new JsonObject();

// The PDF opens without a password.
try {
    $pdf->LoadFile('qa_data/pdf/no_copy_permission.pdf');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Extracting text is refused, because the PDF's permissions do not allow copying.
try {
    $pdf->ExtractText('text', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo 'Extraction refused: ', $e->getMessage(), "\n";
}

// "assess" reports only counts and ratings, never text, so it is always allowed.
try {
    $pdf->ExtractText('assess', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'rating: ', $jsonOut->StringOf('quality.rating'), "\n";

// Load with the owner password to get owner rights, which include copying.
$pdf->OwnerPassword = 'owner-secret';
try {
    $pdf->LoadFile('qa_data/pdf/no_copy_permission.pdf');

    $pdf->ExtractText('text', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo $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.