I want to use Widget PDF to embed PDF files on my MediaWiki pages. So at first installed Extension:Widgets on MediaWiki and it seems it is installed (I can see it in Installed extensions list in Special:Version of the Wiki). The I copied and pasted the entire source of the PDF widget code page into a page called Widget:PDF on my Wiki:

<big>This widget allows you to '''embed PDF files''' on your wiki page.</big>

Created by [https://wiki.karlsregion.net/z/User:Wilhelm_Bühler Wilhelm Bühler] and adapted by [https://www.wikihoster.net Karsten Hoffmeyer].

== Using this widget ==
For information on how to use this widget, see [https://www.mediawikiwidgets.org/PDF widget description page on MediaWikiWidgets.org].

== Copy to your site ==
To use this widget on your site, just install [https://www.mediawiki.org/wiki/Extension:Widgets MediaWiki Widgets extension] and copy the [{{fullurl:{{FULLPAGENAME}}|action=edit}} full source code] of this page to your wiki as page '''{{FULLPAGENAME}}'''.
</noinclude><includeonly><object class="pdf-widget" data="<!--{$url|validate:url}-->" type="application/pdf" wmode="transparent" style="z-index: 999; height: 100%; min-height: <!--{$height|escape:'html'|default:680}-->px; width: 100%; max-width: <!--{$width|escape:'html'|default:960}-->px;"><param name="wmode" value="transparent">
<p>Currently your browser does not use a PDF plugin. You may however <a href="<!--{$url|validate:url}-->">download the PDF file</a> instead.</p></object></includeonly>

My PDF file is under this URL:


And it's name is File:GraphicsandAnimations-Devoxx2010.pdf. So as described here, I added this code to my Wiki page:


But this error occured:

The localhost page isn’t working
localhost is currently unable to handle this request. 

What I did:

  1. Also I tried this (original example of the Widget PDF)


    But result was the same.

  2. I read Extension talk:Widgets but did not find any thing.

  3. I opened Chrome DevTools (Ctrl+Shift+I), but there was no error.

How I can solve the problem?


After some times, I tried to uninstall Widget PDF and Extension:Widgets and reinstall them. So I removed Extension:Widgets files/folder from $IP/extensions/ and also deleted Widget:PDF page from Wiki. Then I installed Extension:Widgets again, but now, I can not open the Wiki pages at all (I see above error again), unless I delete require_once "$IP/extensions/Widgets/Widgets.php"; from LocalSettings.php. So I even cannot try to load Extension:Widgets.

Now I see this error in DevTools:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Also after uninstalling Extension:Widgets, I tried Extension:PDFEmbed and unfortunately again I saw above error.

  • HTTP 500 errors will be logged on your server (e.g. the PHP error log, depends on your configuration), not your browser.
    – Tgr
    Feb 26, 2017 at 19:01

2 Answers 2


No idea if this will help, but the first thing I would try would be replacing localhost with the IP address

  • Thank you for your reply. But I have encountered with a new problem and cannot try your proposed way. I edited my question. Please see that again. Feb 24, 2017 at 17:37

I could not solve above problem for using extensions to embedding PDF in MediaWiki. So finally I used $wgRawHtml and uesed this code in my Wiki page:

<embed src="http://localhost/<wiki-name>/images/5/59/GraphicsandAnimations-Devoxx2010.pdf#page=14" width="1200px" height="500px" />

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