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(PHP ActiveX) PDF Signature with Background Image (Seal/Stamp/etc.)See more PDF Signatures ExamplesDemonstrates how to sign a PDF with an appearance that includes a background image, such as a seal, stamp, etc. Note: This example requires Chilkat v9.5.0.85 or greater.
<?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); // 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 10.0 $json->UpdateString('appearance.fontScale','10.0'); // In this example, the appearance of the digital signature will contain three lines: // 1) The signing certificate's common name // 2) The current date/time // 3) Some arbitrary text. // The keyword "cert_cn" is replaced with the Certificate's Subject Common Name. // The keyword "current_dt" is replaced with the current date/time. // Any number of appearance text lines can be added. $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.'); // Load a JPG image to be shown with 30% opacity in the background. // (the image must be in the JPG format) // The sample university.jpb is available at https://example-code.com/images/university.jpg // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData') $jpgData = new COM("Chilkat.BinData"); $success = $jpgData->LoadFile('qa_data/jpg/university.jpg'); if ($success == 0) { print 'Failed to load the JPG image.' . "\n"; exit; } $success = $pdf->SetSignatureJpeg($jpgData); if ($success == 0) { print $pdf->LastErrorText . "\n"; exit; } // Specify that we want to display the JPG image in the center with 30% opacity. $json->UpdateString('appearance.image','custom-jpg'); $json->UpdateString('appearance.imagePlacement','center'); $json->UpdateString('appearance.imageOpacity','30'); // 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 below. // The JPG is automatically scaled to the size of the signature based on the signature's font scale // and number of text lines. ?> |
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