PHP Requires Chilkat v11.7.0+

A PDF Watermark That Only Appears When Printed

See more PDF Watermark Examples

Demonstrates a watermark that is invisible on screen and appears on paper, which is what a "printed copies are uncontrolled" marking needs. Two approaches can do it: an optional-content layer with layer.view off and layer.print on, which also gives the reader an entry in the layers panel of the viewer (layer.locked stops them switching it), and a Watermark annotation with annotation.view false and annotation.print true. annotation.fixedPrint keeps the printed size and position the same whatever paper it goes on. 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 is available at two_page_memo.pdf

$pdf = new Pdf();
try {
    $pdf->LoadFile('qa_data/pdf/two_page_memo.pdf');

    $json = new JsonObject();
    $json->UpdateString('type', 'text');
    $json->UpdateString('text', 'UNCONTROLLED WHEN PRINTED');
    $json->UpdateString('id', 'printonly');

    // As a layer: off on screen, on when printing, and locked so the reader cannot switch it on.
    $json->UpdateString('approach', 'layer');
    $json->UpdateString('layer.name', 'Print marking');
    $json->UpdateString('layer.view', 'off');
    $json->UpdateString('layer.print', 'on');
    $json->UpdateBool('layer.locked', true);

    $json->UpdateString('rotation', 'diagonal');
    $json->UpdateString('scale.fit', 'page');
    $json->UpdateNumber('scale.fitPercent', '70');
    $json->UpdateNumber('opacity', '0.3');

    $jsonOut = new JsonObject();
    $pdf->Watermark('add', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'layer id: ', $jsonOut->StringOf('id'), ' pages: ', $jsonOut->StringOf('pages'), "\n";

try {
    $pdf->WriteFile('qa_output/memo_print_only.pdf');

    // The same thing as an annotation instead.
    $pdf2 = new Pdf();
    $pdf2->LoadFile('qa_data/pdf/two_page_memo.pdf');

    $json2 = new JsonObject();
    $json2->UpdateString('type', 'text');
    $json2->UpdateString('text', 'UNCONTROLLED WHEN PRINTED');
    $json2->UpdateString('id', 'printonly2');
    $json2->UpdateString('approach', 'annotation');
    $json2->UpdateBool('annotation.view', false);
    $json2->UpdateBool('annotation.print', true);
    $json2->UpdateBool('annotation.fixedPrint', true);
    $json2->UpdateString('rotation', 'diagonal');
    $pdf2->Watermark('add', $json2, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'annotation id: ', $jsonOut->StringOf('id'), "\n";

// Sample output:

// layer id: printonly pages: 1-2
// annotation id: printonly2