(PHP ActiveX) PDF Signatures with Built-in SVG Graphics

See more PDF Signatures Examples

This example demonstrates the built-in SVG graphics that can be applied to the appearance when signing a PDF.

Note: This example requires Chilkat v9.5.0.85 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Pdf')
$pdf = new COM("Chilkat.Pdf");

// Load a PDF to be signed.
// The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
$success = $pdf->LoadFile('qa_data/pdf/hello.pdf');
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

// Options for signing are specified in JSON.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");

// In most cases, the signingCertificateV2 and signingTime attributes are required.
$json->UpdateInt('signingCertificateV2',1);
$json->UpdateInt('signingTime',1);

// Specify the location/position, scale, and content of the signature's appearance.
$json->UpdateInt('page',1);
$json->UpdateString('appearance.y','top');
$json->UpdateString('appearance.x','left');
$json->UpdateString('appearance.fontScale','10.0');
$json->UpdateString('appearance.text[0]','Digitally signed by: cert_cn');
$json->UpdateString('appearance.text[1]','current_dt');
$json->UpdateString('appearance.text[2]','The crazy brown fox jumps over the lazy dog.');

// In addition to the above, this example adds a built-in SVG graphic to the appearance.
// The built-in SVG graphic is specified by a name, such as "green-check-grey-circle".
// The full list of graphic names and images are shown below.
$json->UpdateString('appearance.image','green-check-grey-circle');

// The graphic can be placed "left", "center", or "right".
// If "center", then the graphic is displayed behind the text.
$json->UpdateString('appearance.imagePlacement','left');

// The graphic's opacity can range from 1 to 100.
// Centered graphics look best with less opacity (50 or less).
// In this example, we'll keep the opacity at 100.
$json->UpdateString('appearance.imageOpacity','100');

// Here's an example of the signature's appearance if we centered the SVG graphic with an opacity of 40%


// Load the signing certificate. (Use your own certificate.)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert')
$cert = new COM("Chilkat.Cert");
$success = $cert->LoadPfxFile('qa_data/pfx/myPdfSigningCert.pfx','secret');
if ($success == 0) {
    print $cert->LastErrorText . "\n";
    exit;
}

// Tell the pdf object to use the certificate for signing.
$success = $pdf->SetSigningCert($cert);
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

$success = $pdf->SignPdf($json,'qa_output/hello_signed.pdf');
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

print 'The PDF has been successfully cryptographically signed.' . "\n";

// The appearance of the signature appears in Adobe Acrobat as shown here:



// The SVG icon graphics are embedded within the Chilkat library, 
// and were graciously provided by uxwing - Free SVG Icons 
// 
// The uxwing licensing terms are reproduced here and can be verified at uxwing licensing

// Icons from uxwing.com are free (see https://uxwing.com/license/)
// 	- All icons on UXWing free to download, and use personal, commercial projects.
// 	- Attribution and Credit is NOT required, however, any credit will be much appreciated.
// 	- There is no limit to the number of times you can use.
// 	- You may modify the resources according to your requirements.

// The set of SVG names and the corresponding graphics are shown below.
// 
// For example, if we specify "green-check-green-circle"
$json->UpdateString('appearance.image','green-check-green-circle');
// We get:


// "application-approved"


// "application-rejected"


// "document-accepted"


// "approved"


// "blue-check-mark"


// "green-check-mark"


// "green-check-grey-circle"


// "red-x-red-circle"


// "rejected"


// "result-failure"


// "result-pass"


// "signature"


// "document-check"


// "document-x"


// "red-x-grey-circle"


?>