php Implementation to pdf Add Digital Signature Operation Example [Attached Source Code Download]
- 2021-10-25 06:08:52
- OfStack
In this paper, an example is given to describe the operation of adding digital signature to pdf by php. Share it for your reference, as follows:
//============================================================+
// File name : example_052.php
// Begin : 2009-05-07
// Last Update : 2013-05-14
//
// Description : Example 052 for TCPDF class
// Certification Signature (experimental)
//
// Author: Nicola Asuni
//
// (c) Copyright:
// Nicola Asuni
// Tecnick.com LTD
// www.tecnick.com
// info@tecnick.com
//============================================================+
/**
* Creates an example PDF TEST document using TCPDF
* @package com.tecnick.tcpdf
* @abstract TCPDF - Example: Certification Signature (experimental)
* @author Nicola Asuni
* @since 2009-05-07
*/
// Include the main TCPDF library (search for installation path).
require_once('tcpdf_include.php');
// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Nicola Asuni');
$pdf->SetTitle('TCPDF Example 052');
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');
// set default header data
$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 052', PDF_HEADER_STRING);
// set header and footer fonts
$pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
$pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));
// set default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
// set margins
$pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
$pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
$pdf->SetFooterMargin(PDF_MARGIN_FOOTER);
// set auto page breaks
$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
// set image scale factor
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
// set some language-dependent strings (optional)
if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
require_once(dirname(__FILE__).'/lang/eng.php');
$pdf->setLanguageArray($l);
}
// ---------------------------------------------------------
/*
NOTES:
- To create self-signed signature: openssl req -x509 -nodes -days 365000 -newkey rsa:1024 -keyout tcpdf.crt -out tcpdf.crt
- To export crt to p12: openssl pkcs12 -export -in tcpdf.crt -out tcpdf.p12
- To convert pfx certificate to pem: openssl pkcs12 -in tcpdf.pfx -out tcpdf.crt -nodes
*/
// set certificate file
$certificate = 'file://data/cert/tcpdf.crt';
$certificate = 'file://'.realpath('./data/cert/tcpdf.crt');
// set additional information
$info = array(
'Name' => 'TCPDF',
'Location' => 'Office',
'Reason' => 'Testing TCPDF',
'ContactInfo' => 'http://www.tcpdf.org',
);
// set document signature
$pdf->setSignature($certificate, $certificate, 'tcpdfdemo', '', 2, $info);
// set font
$pdf->SetFont('helvetica', '', 12);
// add a page
$pdf->AddPage();
// print a line of text
$text = 'This is a <b color="#FF0000">digitally signed document</b> using the default (example) <b>tcpdf.crt</b> certificate.<br />To validate this signature you have to load the <b color="#006600">tcpdf.fdf</b> on the Arobat Reader to add the certificate to <i>List of Trusted Identities</i>.<br /><br />For more information check the source code of this example and the source code documentation for the <i>setSignature()</i> method.<br /><br /><a href="http://www.tcpdf.org" rel="external nofollow" >www.tcpdf.org</a>';
$pdf->writeHTML($text, true, 0, true, 0);
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// *** set signature appearance ***
// create content for signature (image and/or text)
$pdf->Image('images/tcpdf_signature.png', 180, 60, 15, 15, 'PNG');
// define active area for signature appearance
$pdf->setSignatureAppearance(180, 60, 15, 15);
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// *** set an empty signature appearance ***
$pdf->addEmptySignatureAppearance(180, 80, 15, 15);
// ---------------------------------------------------------
//Close and output PDF document
$pdf->Output('example_052.pdf', 'D');
//============================================================+
// END OF FILE
//============================================================+
Where the tcpdf_include. php file (from the tcpdf plug-in) is as follows:
<?php
//============================================================+
// File name : tcpdf_include.php
// Begin : 2008-05-14
// Last Update : 2014-12-10
//
// Description : Search and include the TCPDF library.
//
// Author: Nicola Asuni
//
// (c) Copyright:
// Nicola Asuni
// Tecnick.com LTD
// www.tecnick.com
// info@tecnick.com
//============================================================+
/**
* Search and include the TCPDF library.
* @package com.tecnick.tcpdf
* @abstract TCPDF - Include the main class.
* @author Nicola Asuni
* @since 2013-05-14
*/
// always load alternative config file for examples
require_once('config/tcpdf_config_alt.php');
// Include the main TCPDF library (search the library on the following directories).
$tcpdf_include_dirs = array(
realpath('../tcpdf.php'),
'/usr/share/php/tcpdf/tcpdf.php',
'/usr/share/tcpdf/tcpdf.php',
'/usr/share/php-tcpdf/tcpdf.php',
'/var/www/tcpdf/tcpdf.php',
'/var/www/html/tcpdf/tcpdf.php',
'/usr/local/apache2/htdocs/tcpdf/tcpdf.php'
);
foreach ($tcpdf_include_dirs as $tcpdf_include_path) {
if (@file_exists($tcpdf_include_path)) {
require_once($tcpdf_include_path);
break;
}
}
//============================================================+
// END OF FILE
//============================================================+
The file eng. php is as follows:
<?php
//============================================================+
// File name : eng.php
// Begin : 2004-03-03
// Last Update : 2010-10-26
//
// Description : Language module for TCPDF
// (contains translated texts)
// English
//
// Author: Nicola Asuni
//
// (c) Copyright:
// Nicola Asuni
// Tecnick.com LTD
// Manor Coach House, Church Hill
// Aldershot, Hants, GU12 4RQ
// UK
// www.tecnick.com
// info@tecnick.com
//============================================================+
/**
* TCPDF language file (contains translated texts).
* @package com.tecnick.tcpdf
* @brief TCPDF language file: English
* @author Nicola Asuni
* @since 2004-03-03
*/
// English
global $l;
$l = Array();
// PAGE META DESCRIPTORS --------------------------------------
$l['a_meta_charset'] = 'UTF-8';
$l['a_meta_dir'] = 'ltr';
$l['a_meta_language'] = 'en';
// TRANSLATIONS --------------------------------------
$l['w_page'] = 'page';
//============================================================+
// END OF FILE
//============================================================+
Additional:
tcpdf. crt file click here to download.
tcpdf plug-in click here to download this site.
For more readers interested in PHP related contents, please check the special topics of this site: "php File Operation Summary", "php Encryption Method Summary", "PHP Encoding and Transcoding Operation Skills Summary", "PHP Data Structure and Algorithm Tutorial", "php Programming Algorithm Summary", "PHP Mathematical Operation Skills Summary" and "php String (string) Usage Summary"
I hope this article is helpful to everyone's PHP programming.