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(PHP Extension) PDF Signature Appearance Text Substitution KeywordsSee more PDF Signatures ExamplesThis example demonstrates the text substitution keywords that can be used in the PDF signature's appearance text. Note: This example requires Chilkat v9.5.0.85 or greater.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $pdf = new CkPdf(); // Load a PDF to be signed. $success = $pdf->LoadFile('qa_data/pdf/empty.pdf'); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } // Options for signing are specified in JSON. $json = new CkJsonObject(); // In most cases, the signingCertificateV2 and signingTime attributes are required. $json->UpdateInt('signingCertificateV2',1); $json->UpdateInt('signingTime',1); // Put the signature on page 1, top left $json->UpdateInt('page',1); $json->UpdateString('appearance.y','top'); $json->UpdateString('appearance.x','left'); // Use a font scale of 7.0 $json->UpdateString('appearance.fontScale','7.0'); // The appearance of the PDF signature can contain any number of text lines. // Chilkat has defined a number of special keywords that can be used in any text line. // Each keyword is replaced with the actual value. // For example, "cert_cn" is replaced with the certificate subject's common name (CN). // Here we are creating a signature with many lines of text, to demonstrate each // keyword. $json->UpdateString('appearance.text[0]','Date/time in PDF format: current_dt'); $json->UpdateString('appearance.text[1]','Current Local date/time: current_datetime'); $json->UpdateString('appearance.text[2]','GMT Timestamp: current_timestamp_gmt'); $json->UpdateString('appearance.text[3]','Local Timestamp: current_timestamp_local'); $json->UpdateString('appearance.text[4]','GMT RFC822 date/time: current_rfc822_dt_gmt'); $json->UpdateString('appearance.text[5]','Local RFC822 date/time: current_rfc822_dt_local'); $json->UpdateString('appearance.text[6]','Cert DN (Distinguished Name): cert_dn'); $json->UpdateString('appearance.text[7]','Cert Common Name: cert_cn'); $json->UpdateString('appearance.text[8]','Cert Organizational ID (2.5.4.97): cert_org_id'); $json->UpdateString('appearance.text[9]','Cert Email: cert_email'); $json->UpdateString('appearance.text[10]','Cert Organization: cert_organization'); $json->UpdateString('appearance.text[11]','Cert Organziational Unit: cert_ou'); $json->UpdateString('appearance.text[12]','Cert State: cert_state'); $json->UpdateString('appearance.text[13]','Cert Country: cert_country'); $json->UpdateString('appearance.text[14]','Cert Locality: cert_locality'); $json->UpdateString('appearance.text[15]','Cert Serial Number (hex): cert_serial_hex'); $json->UpdateString('appearance.text[16]','Cert Serial Number (decimal): cert_serial_dec'); $json->UpdateString('appearance.text[17]','Cert Thumbprint: cert_thumbprint'); $json->UpdateString('appearance.text[18]','Cert Issuer Common Name: cert_issuer_cn'); $jpgData = new CkBinData(); $success = $jpgData->LoadFile('qa_data/jpg/seal1.jpg'); if ($success == false) { print 'Failed to load the JPG image.' . "\n"; exit; } $success = $pdf->SetSignatureJpeg($jpgData); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } // Specify that we want to display the JPG image in the center with 33% opacity. $json->UpdateString('appearance.image','custom-jpg'); $json->UpdateString('appearance.imagePlacement','center'); $json->UpdateString('appearance.imageOpacity','33'); // Load the signing certificate. (Use your own certificate.) $cert = new CkCert(); $success = $cert->LoadPfxFile('qa_data/pfx/myPdfSigningCert.pfx','pfx_password'); if ($success == false) { print $cert->lastErrorText() . "\n"; exit; } // Tell the pdf object to use the certificate for signing. $success = $pdf->SetSigningCert($cert); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } $success = $pdf->SignPdf($json,'qa_output/hello_signed.pdf'); if ($success == false) { 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: ?> |
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