--
-
1. What's exactly the license of FPDF? Are there any usage restrictions?
-FPDF is released under a permissive license: there is no usage restriction. You may embed it
-freely in your application (commercial or not), with or without modifications.
-
-
--
-
2. When I try to create a PDF, a lot of weird characters show on the screen. Why?
-These "weird" characters are in fact the actual content of your PDF. This behavior is a bug of
-IE6. When it first receives an HTML page, then a PDF from the same URL, it displays it directly
-without launching Acrobat. This happens frequently during the development stage: on the least
-script error, an HTML page is sent, and after correction, the PDF arrives.
-
-To solve the problem, simply quit and restart IE. You can also go to another URL and come
-back.
-
-To avoid this kind of inconvenience during the development, you can generate the PDF directly
-to a file and open it through the explorer.
-
-
--
-
3. I try to generate a PDF and IE displays a blank page. What happens?
-First of all, check that you send nothing to the browser after the PDF (not even a space or a
-carriage return). You can put an exit statement just after the call to the Output() method to
-be sure. If it still doesn't work, it means you're a victim of the "blank page syndrome". IE
-used in conjunction with the Acrobat plug-in suffers from many bugs. To avoid these problems
-in a reliable manner, two main techniques exist:
-
-
-- Disable the plug-in and use Acrobat as a helper application. To do this, launch Acrobat, go
-to the Edit menu, Preferences, Internet, and uncheck "Display PDF in browser". Then, the next
-time you load a PDF in IE, it displays the dialog box "Open it" or "Save it to disk". Uncheck
-the option "Always ask before opening this type of file" and choose Open. From now on, PDF files
-will open automatically in an external Acrobat window.
-
-The drawback of the method is that you need to alter the client configuration, which you can do
-in an intranet environment but not for the Internet.
-
-
-- Use a redirection technique. It consists in generating the PDF in a temporary file on the server
-and redirect the client to it. For example, at the end of the script, you can put the following:
-
-
//Determine a temporary file name in the current directory
-$file = basename(tempnam('.', 'tmp'));
-rename($file, $file.'.pdf');
-$file .= '.pdf';
-//Save PDF to file
-$pdf->Output($file, 'F');
-//Redirect
-header('Location: '.$file);
-
-
function CleanFiles($dir)
-{
- //Delete temporary files
- $t = time();
- $h = opendir($dir);
- while($file=readdir($h))
- {
- if(substr($file,0,3)=='tmp' && substr($file,-4)=='.pdf')
- {
- $path = $dir.'/'.$file;
- if($t-filemtime($path)>3600)
- @unlink($path);
- }
- }
- closedir($h);
-}
-
-
--
-
4. I can't make line breaks work. I put \n in the string printed by MultiCell but it doesn't work.
-You have to enclose your string with double quotes, not single ones.
-
-
--
-
5. I try to display a variable in the Header method but nothing prints.
-You have to use the global keyword to access global variables, for example:
-
-
function Header()
-{
- global $title;
-
- $this->SetFont('Arial', 'B', 15);
- $this->Cell(0, 10, $title, 1, 1, 'C');
-}
-
-$title = 'My title';
-
-
function Header()
-{
- $this->SetFont('Arial', 'B', 15);
- $this->Cell(0, 10, $this->title, 1, 1, 'C');
-}
-
-$pdf->title = 'My title';
-
-
--
-
6. I defined the Header and Footer methods in my PDF class but nothing appears.
-You have to create an object from the PDF class, not FPDF:
-
-
-
--
-
7. Accented characters are replaced by some strange characters like é.
-Don't use UTF-8 encoding. Standard FPDF fonts use ISO-8859-1 or Windows-1252.
-It is possible to perform a conversion to ISO-8859-1 with utf8_decode():
-
-
$str = utf8_decode($str);
-
-
$str = iconv('UTF-8', 'windows-1252', $str);
-
-
--
-
8. I try to display the Euro symbol but it doesn't work.
-The standard fonts have the Euro character at position 128. You can define a constant like this
-for convenience:
-
-
define('EURO', chr(128));
-
-
--
-
9. I get the following error when I try to generate a PDF: Some data has already been output, can't send PDF file
-You must send nothing to the browser except the PDF itself: no HTML, no space, no carriage return. A common
-case is having extra blank at the end of an included script file.
-If you can't figure out where the problem comes from, this other message appearing just before can help you:
-
-Warning: Cannot modify header information - headers already sent by (output started at script.php:X)
-
-It means that script.php outputs something at line X. Go to this line and fix it.
-In case the message doesn't show, first check that you didn't disable warnings, then add this at the very
-beginning of your script:
-
-If you still don't see it, disable zlib.output_compression in your php.ini and it should appear.
-
-
--
-
10. I draw a frame with very precise dimensions, but when printed I notice some differences.
-To respect dimensions, select "None" for the Page Scaling setting instead of "Shrink to Printable Area" in the print dialog box.
-
-
--
-
11. I'd like to use the whole surface of the page, but when printed I always have some margins. How can I get rid of them?
-Printers have physical margins (different depending on the models); it is therefore impossible to remove
-them and print on the whole surface of the paper.
-
-
--
-
12. How can I put a background in my PDF?
-For a picture, call Image() in the Header() method, before any other output. To set a background color, use Rect().
-
-
--
-
13. How can I set a specific header or footer on the first page?
-Simply test the page number:
-
-
function Header()
-{
- if($this->PageNo()==1)
- {
- //First page
- ...
- }
- else
- {
- //Other pages
- ...
- }
-}
-
-
--
-
14. I'd like to use extensions provided by different scripts. How can I combine them?
-Use an inheritance chain. If you have two classes, say A in a.php:
-
-
require('fpdf.php');
-
-class A extends FPDF
-{
-...
-}
-
-
require('fpdf.php');
-
-class B extends FPDF
-{
-...
-}
-
-
require('a.php');
-
-class B extends A
-{
-...
-}
-
-
require('b.php');
-
-class PDF extends B
-{
-...
-}
-
-$pdf = new PDF();
-
-
--
-
15. How can I send the PDF by email?
-As any other file, but an easy way is to use PHPMailer and
-its in-memory attachment:
-
-
$mail = new PHPMailer();
-...
-$doc = $pdf->Output('', 'S');
-$mail->AddStringAttachment($doc, 'doc.pdf', 'base64', 'application/pdf');
-$mail->Send();
-
-
--
-
16. What's the limit of the file sizes I can generate with FPDF?
-There is no particular limit. There are some constraints, however:
-
-
-- The maximum memory size allocated to PHP scripts is usually 8MB. For very big documents,
-especially with images, this limit may be reached (the file being built into memory). The
-parameter is configured in the php.ini file.
-
-
-- The maximum execution time allocated defaults to 30 seconds. This limit can of course be easily
-reached. It is configured in php.ini and may be altered dynamically with set_time_limit().
-
-
-- Browsers generally have a 5 minute time-out. If you send the PDF directly to the browser and
-reach the limit, it will be lost. It is therefore advised for very big documents to
-generate them in a file, and to send some data to the browser from time to time (with a call
-to flush() to force the output). When the document is finished, you can send a redirection to
-it or create a link.
-
-Remark: even if the browser times out, the script may continue to run on the server.
-
-
--
-
17. Can I modify a PDF with FPDF?
-It is possible to import pages from an existing PDF document thanks to the FPDI extension:
-
-http://www.setasign.de/products/pdf-php-solutions/fpdi/
-
-You can then add some content to them.
-
-
--
-
18. I'd like to make a search engine in PHP and index PDF files. Can I do it with FPDF?
-No. But a GPL C utility does exist, pdftotext, which is able to extract the textual content from
-a PDF. It is provided with the Xpdf package:
-
-http://www.foolabs.com/xpdf/
-
-
--
-
19. Can I convert an HTML page to PDF with FPDF?
-Not real-world pages. But a GPL C utility does exist, htmldoc, which allows to do it and gives good results:
-
-http://www.htmldoc.org
-
-
--
-
20. Can I concatenate PDF files with FPDF?
-Not directly, but it is possible to use FPDI
-to perform this task. Some free command-line tools also exist:
-
-mbtPdfAsm
-pdftk
-
-
-
-
diff --git a/vendor/fpdf/bg.png b/vendor/fpdf/bg.png
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