Sign a PDF document on Server/Desktop

To sign an existing approval signature field in a PDF Document:

1$doc = new PDFDoc($docpath);
2
3// Retrieve the unsigned approval signature field.
4$found_approval_field = $doc->GetField($approval_field_name);
5$approval_digsig_field = new DigitalSignatureField($found_approval_field);
6
7// (OPTIONAL) Add more information to the signature dictionary.
8$approval_digsig_field->SetLocation('Vancouver, BC');
9$approval_digsig_field->SetReason('Document approval.');
10$approval_digsig_field->SetContactInfo('www.apryse.com');
11
12// (OPTIONAL) Add an appearance to the signature field.
13$img = Image::Create($doc->GetSDFDoc(), $appearance_img_path);
14$found_approval_signature_widget = new SignatureWidget($found_approval_field->GetSDFObj());
15$found_approval_signature_widget->CreateSignatureAppearance($img);
16
17// Prepare the signature and signature handler for signing.
18$approval_digsig_field->SignOnNextSave($private_key_file_path, $keyfile_password);
19
20// The actual approval signing will be done during the following incremental save operation.
21$doc->Save($outpath, SDFDoc::e_incremental);

Digitally sign PDF files
Full code sample which demonstrates using the digital signature API to digitally sign and/or certify PDF documents.

About Adding An Approval Signature to a PDF Document

The Apryse SDK enables approval signatures in PDF documents using a Digital Certificate, in accordance with the latest PDF specification. By leveraging public key infrastructure (PKI) technology, with a certificate issued by a trusted certificate authority (CA), a signer can use a certificate-based digital ID to guarantee the authenticity of a signature. Placement of a digital signature using a certificate can also guarantee that a document was not modified since the signature was placed, ensuring the authenticity of the document.

Apryse Docs Image

Image taken from Apryse WebViewer

Above is an example of a document containing a certified signature, guaranteed by a certificate generated by Apryse.com.

Did you find this helpful?

Trial setup questions?

Ask experts on Discord

Need other help?

Contact Support

Pricing or product questions?

Contact Sales