Extension talk:Pdf Export Dompdf

PDFExport_body.php
We had a problem with undefined variables. So we changes the file in the line 138 We altered the last line, the two lines above a new. After this change everything works fine.

Added: 27 January 2009


 * This works for me too! Thank you! --Aptd 22:23, 2 September 2009 (UTC)

No Images
We tried to implement this class, but it doesnt include any of our pictures. Is there a solution to it?

Not a bug
Images are supported. This extension, just like the other PDF exporters, uses the style sheet that's served to "print" media. In short, you should have a print.css file in your theme. You will need to edit that to include background watermarks and the like. Alternatively, you can edit $IP/extensions/PdfExport/PdfExport_headfoot.php if you just want to include a logo, letterhead, copyright, info, etcetera.

Problems with nontrivial wikitext
Running MediaWiki 1.13.2, PDFExport 2.0 with dompdf changes described here.

A lot of very simple pages print fine with dompdf; however, some pages give errors on display. For example, the following simple table in a MW page gives a 'File does not being with "%PDF-"...' error on Safari under Mac OS X:

If you remove the nowiki, it works. (EDIT) However, the following code which does not use nowiki and does not number the table cell also doesn't work:

=test=

test3
EDIT: I've figured out that the problem above may be related to the generation of tables of contents. If I turn off this with, the PDF print works OK. However, on a very large page which is just a string of headers and pre blocks, I still get the "File does not begin with %PDF-" error when I export to PDF.

We're also getting the following written to the PDF on some pages:

exception 'DOMPDF_Exception' with message 'Box property calculation requires containing block width' in /usr/local/apache2/htdocs  /wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php:111 Stack trace:
 * 1) 0 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php(368): Block_Frame_Reflower->_calculate_restricted_width
 * 2) 1 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Block_Frame_Reflower->reflow
 * 3) 2 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php(408): Frame_Decorator->reflow
 * 4) 3 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Block_Frame_Reflower->reflow
 * 5) 4 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php(408): Frame_Decorator->reflow
 * 6) 5 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Block_Frame_Reflower->reflow
 * 7) 6 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php(408): Frame_Decorator->reflow
 * 8) 7 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Block_Frame_Reflower->reflow
 * 9) 8 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/table_cell_frame_reflower.cls.php(115): Frame_Decorator->reflow
 * 10) 9 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Table_Cell_Frame_Reflower->reflow
 * 11) 10 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/table_row_frame_reflower.cls.php(70): Frame_Decorator->reflow
 * 12) 11 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Table_Row_Frame_Reflower->reflow
 * 13) 12 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/table_frame_reflower.cls.php(468): Frame_Decorator->reflow
 * 14) 13 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Table_Frame_Reflower->reflow
 * 15) 14 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/block_frame_reflower.cls.php(408): Frame_Decorator->reflow
 * 16) 15 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Block_Frame_Reflower->reflow
 * 17) 16 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/page_frame_reflower.cls.php(78): Frame_Decorator->reflow
 * 18) 17 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/frame_decorator.cls.php(387): Page_Frame_Reflower->reflow
 * 19) 18 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/dompdf/include/dompdf.cls.php(417): Frame_Decorator->reflow
 * 20) 19 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/PdfExport_body.php(136): DOMPDF->render
 * 21) 20 /usr/local/apache2/htdocs/wiki/extensions/PdfExport/PdfExport_body.php(171): SpecialPdf->outputpdf(Array, ' --portrait ', 'Letter')
 * 22) 21 /usr/local/apache2/htdocs/wiki/includes/SpecialPage.php(534): SpecialPdf->execute(NULL)
 * 23) 22 /usr/local/apache2/htdocs/wiki/includes/Wiki.php(224): SpecialPage::executePath(Object(Title))
 * 24) 23 /usr/local/apache2/htdocs/wiki/includes/Wiki.php(55): MediaWiki->initializeSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
 * 25) 24 /usr/local/apache2/htdocs/wiki/index.php(93): MediaWiki->initialize(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest))
 * 26) 25 {main}

VIngogly 16:15, 6 February 2009 (UTC)

Noted
I have taken notice of your problem. I will look into a fix, but I must say right off the bat that it is a limitation of the DOMPDF class itself (and not the fault of this extension, per se). The class, though it works stupendously, is still quirky. The author seems to have abandoned it, but I will see about picking up where he left off.

reply from Vingogly: I've come to the same conclusion myself - DOMPDF doesn't handle anything beyond the simplest wikitext very well. I'm looking at other alternatives like HTML_ToPDF to integrate into a custom solution for my client. We really do need a solution that works here, and that will let us integrate a custom footer with a copyright disclaimer on every printed page. Thanks for your help!

VIngogly 17:40, 17 February 2009 (UTC)


 * What was your solution, i am getting the same problem. 67.97.209.36 15:33, 11 June 2009 (UTC)

Code has been updated
I took the liberty of updating the code to be compatible with the latest versions of Pdf Export, DOMPDF, and MediaWiki. It should work flawlessly. No problems with autoload functionality if you're running PHP 5.1.2 or higher (See: spl_autoload_register). Temp directory has been changed to use system temp directory. Change that back to $wgTmpDirectory (don't forget to globalize it) if you have any issues. All modifications have been noted in the source code. Feel free to modify as needed.

Fail to render a pdf if restricted access
Hi, the extension works fine. Also the version with htmldoc. One small problem occurs if you restrict the access e.g. $wgGroupPermissions['*']['read'] = false;

In this case the extension fails, because she dont use the rights of the actual user. If i use the restricted access as above, i got access denied error.... you have to sign in first.

it would by great, if you can enhance it.

--Ozz 17:25, 20 October 2009 (UTC)

Problem with images
Hi, the extension works fine for me too. I'm with PdfExport Version 2.3 modified, DOMPDF 0.6.0 alpha 2, MediaWiki 1.15.1.

The only problem I have is with the images, instead of my pictures I just get a box with a red cross. Maybe the problem comes from DOMPDF but the - dompdf 0.5.1 Featured - just gives me errors. If somebody had this problem and solved It, I would love to know the solution :)

-- Francois, 23 Feb 2010

Finally I've found how to solve my problem, it was because My wiki was in a protected password directory. Dompdf couldn't access to the images. If you need help about dompdf, you'll find a nice team of developper here : http://code.google.com/p/dompdf/wiki/FAQ

-- Francois, 4 Mar 2010

Setup problems
I've problems with the installation. I did like described but the server returns a Error 500. I think i have to configure Dompdf, but dont know how. They say: 2.Edit dompdf_config.inc.php to fit your installation. Of course i have no, no, no knowledge of php or thelike, so i not understand really much. Can anybody help me? The server is Windows2003, IIS.... Ralf, 11. August 2010

Extensions gives Zero-length files
Hi, I installed the extension as instructed, but when I click on the export button, I just get a zero-length file "index.php" and no error message. What should I do? PHP version is 5.4.2

I had the same problem, I fixed it adding to my installation the mbstring extension mbstring installation. This extension (php_mbstring.dll) is not installed through the msi windows installer of php, you can get it from the zip distribution at php main site. Of course you have to enable the extension in the php.ini.

--Alberto 10:16, 15 November 2010 (UTC)

File does not beginn with '%PDF-'
Hello I tried to run Dompdf on my wiki, because the instalation of htmldoc failed all to the time.. I get the Error-Message "File does not beginn with '%PDF-'". Is it because I run it with Xampp?

I am receiving the same error. (XAMPP, PHP 5.3.0, MW 1.16.0, PDF Export 2.4, Dompdf 0.60b) -- Jan 7, 2011