PHP Requires Chilkat v11.7.0+

Tile a Watermark Across a PDF Page

See more PDF Watermark Examples

Demonstrates a tiled watermark, which repeats the stamp over the whole page instead of placing it once. Tiling overrides position.align; tile.spacingX and spacingY set the gaps, and tile.stagger offsets alternate rows by half a tile so the pattern does not line up in columns. A faint tiled stamp carrying the name or address is the usual way to mark a document so that a leaked copy can be traced back, and zOrder back keeps it behind the text where it does not hinder reading. 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 long_report.pdf

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

    $json = new JsonObject();
    $json->UpdateString('type', 'text');

    // {date:FORMAT} is replaced per page when the watermark is added.  The other placeholders are
    // {page}, {pages} and {filename}; {{ gives a literal brace.
    $json->UpdateString('text', 'jdoe@example.com  {date:yyyy-MM-dd}');
    $json->UpdateString('id', 'trace');
    $json->UpdateString('zOrder', 'back');
    $json->UpdateNumber('font.size', '14');
    $json->UpdateNumber('opacity', '0.15');
    $json->UpdateNumber('rotation', '30');

    $json->UpdateBool('tile.enabled', true);
    $json->UpdateNumber('tile.spacingX', '60');
    $json->UpdateNumber('tile.spacingY', '80');
    $json->UpdateBool('tile.stagger', true);

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

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

try {
    $pdf->WriteFile('qa_output/report_traced.pdf');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Sample output:

// id: trace pages: 1-3