PHP Extension Requires Chilkat v11.7.0+

Put a Letterhead Behind the First Page of a PDF

See more PDF Watermark Examples

Demonstrates the pdfPage type, which places a page of another PDF as the watermark. It is the way to use a letterhead, a cover overlay or a vector logo that was saved as a PDF, and unlike an image it stays sharp at any size because it is drawn, not resampled. "zOrder" set to back puts it behind the existing content, where a letterhead belongs, and "pages" set to first restricts it to page one. 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

//  The PDF used in this example is available at letterhead.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','pdfPage');
$json->UpdateString('pdf.path','qa_data/pdf/letterhead.pdf');

//  The page of the source PDF to use (1 by default).  "match" instead of a number places source
//  page n on target page n, which suits a set of per-page backgrounds.
$json->UpdateInt('pdf.page',1);

//  Behind the memo's own text, on page one, scaled to the page.
$json->UpdateString('zOrder','back');
$json->UpdateString('pages','first');
$json->UpdateString('scale.fit','page');
$json->UpdateString('id','letterhead');

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

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

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

//  Sample output:

//  id: letterhead pages: 1

?>