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(PHP ActiveX) PDF Signature Appearance Width and HeightSee more PDF Signatures ExamplesThis example explains how the width and height of the signature appearance rectangle box is determined. 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'); // Add some text. $json->UpdateString('appearance.text[0]','Digitally signed by: cert_cn'); $json->UpdateString('appearance.text[1]','current_dt'); // Add a built-in SVG graphic to the right. $json->UpdateString('appearance.image','blue-check-mark'); $json->UpdateString('appearance.imagePlacement','right'); $json->UpdateString('appearance.imageOpacity','100'); // There are 4 ways the width and height of the signature rectangle can be specified. // 1) The width and height (in points) are both explicitly specified. // User space coordinates use "points" where 72 points equals 1 inch. // For example (3 inches wide and 1 inch high) // The fontScale is automatically chose to fit. In addition, if a graphic (JPG or built-in SVG) is included, // it is automatically scaled such that the text + graphic fit together in the specified rectangle. // Note: When both height and width are explicitly specified, the resultant signature appearance rectangle // will match one of the dimensions, but the other dimension will be equal or smaller. This is because the text // must be proportionally scaled. $json->UpdateInt('appearance.width',72 * 3); $json->UpdateInt('appearance.height',72); // The signature would have this appearance. In this case, the height is actually less than 1 inch because // if Chilkat chose a fontScale to fill the height, the resulting text's width would be too long for the desired width. // 2) The width is explicitly specified, but we use the keyword "auto" for height. // In this case, the fontScale is chosen to achieve the desired width, // and the height will be whatever the result of the chosen font scale. // In this example, the width is 4 inches, and the height is "auto". $json->UpdateInt('appearance.width',72 * 4); $json->UpdateString('appearance.height','auto'); // The signature would have this appearance: // 3) The height is explicitly specified, but we use the keyword "auto" for width. // In this case, the fontScale is chosen to achieve the desired height, // and the width will be whatever the result of the chosen font scale. // In this example, the height is 1 inch (72 points) and the width is "auto". $json->UpdateString('appearance.width','auto'); $json->UpdateInt('appearance.height',72); // The signature would have this appearance. // 4) Finally, we don't need to specify width/height at all. Instead, we can choose a fontScale // and the dimensions of the PDF signature appearance's rectangle will be the result of using the // specified fontScale. // jAppearance is a Chilkat.JsonObject $jAppearance = $json->ObjectOf('appearance'); $jAppearance->Delete('width'); $jAppearance->Delete('height'); $json->UpdateString('appearance.fontScale','10.0'); // With fontScale = "10.0" // 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 = $cert->LoadPfxFile('qa_data/pfx/myPdfSigningCert.pfx','pfx_password'); if ($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"; ?> |
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