PDFlib Cookbook

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general/license_key

Apply the PDFlib license key using various methods to get rid of the demo stamp.

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<?php
/*
 * License key:
 * Apply your PDFlib license key using various methods to get rid of the demo 
 * stamp 
 * 
 * The first method is to apply your license key at runtime or (for Windows
 * only) via a registry key. The second alternative method is to supply your
 * license key in a license file and to inform PDFlib about the license file
 * using set_option(), a system environment variable or (for Windows only)
 * a registry key.
 *   
 * Check for an existing license key by using set_option() with the
 * "avoiddemostamp" option.
 * 
 * Note that PDFlib, PDFlib+PDI, and PPS (PDFlib Personalization Server) are
 * different products which require different license keys although they are
 * delivered in a single package. PDFlib+PDI license keys will also be valid
 * for PDFlib, but not vice versa, and PPS license keys will be valid for
 * PDFlib+PDI and PDFlib. All license keys are platform-dependent, and can only
 * be used on the platform for which they have been purchased.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: valid license key for PDFlib, PDFlib+PDI, or PPS
 */

$title = "License Key";

$text=
    "You can apply your PDFlib license key using various methods to get " .
    "rid of the demo stamp. The first method is to apply your license " .
    "key at runtime or (for Windows only) via a registry key. The second " .
    "alternative method is to supply your license key " .
    "in a license file and to inform PDFlib about the license file using " .
    "set_option(\"licensefile=<path to license file>\"), " .
    "a system environment variable or (for Windows only) a registry " .
    "key. " .
    "See the source code for a detailed description. " .
    "See also chapter 0 in the PDFlib Tutorial for detailed " .
    "documentation about the licensing mechanism.";

try {
    $p = new PDFlib();

    /* --- First method:                    --- *
     * --- Apply the license key at runtime --- */
    
    /*
     * Provide the "license" option with your license key. This must
     * be done immediately after having instantiated the PDFlib object
     * with "new pdflib()" In the following function call replace "0"
     * with your license key number.
     */ 
     $p->set_option("license=0");
     
    /* On Windows you can also enter the license key in the following
     * registry key:
      
     HKEY_LOCAL_MACHINE\SOFTWARE\PDFlib\PDFlib\9.0.0 
      
     * with a version of 9.0.0 for example
     */
     
    /* (If you are working with the Windows COM .NET installer 
     * you can enter a license key when you install the PDFlib product.)
     */
     
    /* Using PDFlib+PDI functions if only the PDFlib license key has been
     * installed:
     * If you installed a valid PDFlib license key the PDI functionality
     * will no longer be available for testing. When a license key for a
     * product has already been installed, you can replace it with the
     * dummy license string "0" (zero) to enable functionality of a higher
     * product class for evaluation with:
     * 
     * $p->set_option("license=0");
     * 
     * This will enable the previously disabled functions, and re-activate
     * the demo stamp across all pages. 
     * This also applies to PDFlib+PDI and PPS.
     */ 
    
    
    /* --- Alternative second method:               --- *
     * --- Supply the license key in a license file --- */
        
    /* Enter the license key in a text file according to the following
     * format (use the license file template "licensekeys.txt" which is
     * contained in all PDFlib distributions):
      
       PDFlib license file 1.0
       # Licensing information for PDFlib GmbH products
       PDFlib <version> <license key>
      
     * "PDFlib" indicates PDFlib, PDFlib+PDI, and PPS, respectively.
     * <version> is the PDFlib version number, e.g. 9.0.0, and 
     * <license key> is your license key. The license file may contain 
     * license keys for multiple PDFlib GmbH products on separate lines.
     */ 
    
    /* After the license key has been manually added to the license
     * file, either place the file "licensekeys.txt" in one of the
     * default locations that PDFlib searches (see section "Default 
     * file search paths" in the PDFlib Tutorial), or inform PDFlib
     * about the license file in one of the following ways:
      
       $p->set_option("licensefile=path/to/licensekeys.txt");
      
     * Alternatively, set the environment variable PDFLIBLICENSEFILE to
     * point to your license file. On Windows open the system control panel
     * and choose System, Advanced, Environment Variables, System variables.
     * On Unix apply a command similar to the following:
      
       export PDFLIBLICENSEFILE=/path/to/licensekeys.txt
     
     */
      
    /* On Windows you can also enter the name of the license file in the
     * following registry key:
      
       HKLM\Software\PDFlib\PDFLIBLICENSEFILE
     
     */
    
    /* This means we must check return values of load_font() etc. */
    $p->set_option("errorpolicy=return");
    $p->set_option("stringformat=utf8");
    
    /* Start the first document. By default, a demo stamp will be generated
     * on all pages if no valid license key has been found. 
     */
    if ($p->begin_document("", "") == 0)
        throw new Exception("Error: " . $p->get_errmsg());

    $p->set_info("Creator", "PDFlib Cookbook");
    $p->set_info("Title", $title);
    
    /* Start page */
    $p->begin_page_ext(0, 0, "width=a4.width height=a4.height");
    
    $optlist =
        "fontname=Helvetica-Bold fontsize=16 encoding=unicode " .
        "fillcolor={gray 0} leading=140%";
    
    $tf = $p->add_textflow(0, $text, $optlist);
    if ($tf == 0)
    throw new Exception("Error: " . $p->get_errmsg());


    $p->fit_textflow($tf, 50, 200, 400, 600, "fitmethod=auto");
           
    $p->end_page_ext("");
    
    $p->end_document("");
    
    $buf = $p->get_buffer();
    $len = strlen($buf);
    
    header("Content-type: application/pdf");
    header("Content-Length: $len");
    header("Content-Disposition: inline; filename=repeated_contents.pdf");
    print $buf;
    
} catch (PDFlibException $e){
    print("PDFlib exception occurred:\n" .
            "[" . $e->get_errnum() . "] " . $e->get_apiname() .
            ": " . $e->get_errmsg() . "\n");
    exit(1);
} catch (Exception $e) {
    print($e->getMessage() . "\n");
    exit(1);
}
$p2 = new PDFlib();
try {
    /* By default a demo stamp will be created on all pages when no valid
        * license key has been found. However, we can force an exception in
        * those cases. This is recommended to be immediately informed about
        * problems with missing or invalid license keys which will result in
        * the unwanted demo stamp. Before beginning a new document, we set the
        * "avoiddemostamp" option to "true". An exception will be thrown when
        * no valid license key has been found.
        */
    $p2->set_option("avoiddemostamp=true");

    /* Start a new document */
    $p2->begin_document("", "");
    $p2->begin_page_ext(0, 0, "width=a4.width height=a4.height");
    $p2->end_page_ext("");
    $p2->end_document("");

} catch (PDFlibException $e) {
    $text = "\n\nPDFlib exception occurred:\n" .
            "[" . $e->get_errnum() . "] " . $e->get_apiname() .
            ": " . $e->get_errmsg() . "\n";
    fwrite(STDERR, $text);
   
    if ($e->get_errnum() == 1994) {
        $text = "\nThis behaviour is expected since we did not\n" .
                "supply a valid license key and set the\n" .
                "\"avoiddemostamp\" option to \"true\".";
        fwrite(STDERR, $text);
    }
} catch (Exception $e) {
    echo($e->getMessage());
    exit(1);
}

$p2 = 0; 
 
$p = 0;
?>