PHP Extension 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. 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 is available at two_page_memo.pdf

$pdf = new CkPdf();
$success = $pdf->LoadFile('qa_data/pdf/two_page_memo.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

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

print 'layer id: ' . $jsonOut->stringOf('id') . ' pages: ' . $jsonOut->stringOf('pages') . "\n";

$success = $pdf->WriteFile('qa_output/memo_print_only.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

//  The same thing as an annotation instead.
$pdf2 = new CkPdf();
$success = $pdf2->LoadFile('qa_data/pdf/two_page_memo.pdf');
if ($success == false) {
    print $pdf2->lastErrorText() . "\n";
    exit;
}

$json2 = new CkJsonObject();
$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');
$success = $pdf2->Watermark('add',$json2,$jsonOut);
if ($success == false) {
    print $pdf2->lastErrorText() . "\n";
    exit;
}

print 'annotation id: ' . $jsonOut->stringOf('id') . "\n";

//  Sample output:

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

?>