Extension talk:BreadCrumbs2

Header problem
When I enable this extension, I get an error about the headers already being sent by BreadCrumbs2.php from WebResponse.php (specifically Warning: Cannot modify header information - headers already sent by (output started at /xxxx/mediawiki-1.11.0/extensions/BreadCrumbs2.php:204) in /xxxx/mediawiki-1.11.0/includes/WebResponse.php on line 10.  Any hints as to how I might fix this? 129.21.126.84 03:32, 8 October 2007 (UTC)

Save your document (php) as plain text, not as utf encoded.


 * ok that did it, thanks 129.21.126.84 21:57, 8 October 2007 (UTC)

recharge
Well, I had the exact same problem, but the encoding was plain text: /etc/mediawiki/LocalSettings.php:              text/plain; charset=us-ascii /var/lib/mediawiki/extensions/BreadCrumbs2.php: text/plain; charset=us-ascii
 * 1) file -i /etc/mediawiki/LocalSettings.php  /var/lib/mediawiki/extensions/BreadCrumbs2.php

The real cause has to do with white spaces outside of the php start and end tags, see this link from Tech Recipes

Link crumbs to normalpages
add around line 40:

// Link crumbs to normal page, not to category page $tree[1] = preg_replace('/Category:/','',$tree[1]);

Remove Current Page Name from Breadcrumb?
{|width="95%" align="right"
 * Hi there. I'm loving this extension.  Thank you very much!  Is there any way to remove the current page name from the outputted breadcrumb?  The reason I ask is because now that I have this extension every page that does not need/have a breadcrumb has the page name in place of it making it look something like this:

Main Page
Main Page

Thank you! Schot 22:53, 16 November 2007 (UTC)
 * }

Response:
Try adding these lines to the MediaWiki:Breadcrumbs page and add your Main Page to a category called "Main Page":

* Main Page @ * default  @ Main Page >

It works for me! I too think this is a brilliant solution to getting breadcrumbs.

147.209.216.245 23:21, 24 January 2008 (UTC)

Number of Levels, something is wrong..
Hi, first of all: Great extension!! Please excuse so many questions, I am a dummy and I suppose the biggest is issue is that I do not get the (digital) logic behind this functions.

I am about to create an extremely structured Wiki, which implies also many levels. Eerythink is fine, but I do net get the following to work - the LeedsAccommodation line does not work at all.. * Going-to @ GoErasmus > Living Abroad > Going-to > * Living Abroad @ GoErasmus > Living Abroad > * LeedsAccommodation @ GoErasmus > UK > Leeds > Accommodation > * Leeds @ GoErasmus > United Kingdom > Leeds > * United Kingdom @ GoErasmus > United Kingdom > Page: [www.goerasmus.eu] Furthermore, I'd like to kill the UK in the LeedsAccommodation line, can I do this?? And how should I sort the lines in BreadCrumb then..

If it is a feature, it would be nice to describe on the extension page itself. My thesis is that many dummies are coming now and open a wiki… Thanks again for the great work! --Jorgusch 12:48, 12 June 2008 (UTC)
 * Btw, the solution for the Main Page does not work for me.
 * You mention above a way to link normal pages with breadcrumb–what I would like to do. How does it work then? Where does BreadCrumb know from, which line to choose? - See my 'logical question' above..

Does this (great) extension works with MW 1.13?
Its behaviour is strange, it doesn't recognize the my category "Home". 88.9.73.154 21:05, 1 August 2008 (UTC)

Breadcrumbs displaying only current page
I defined breadcrumbs for my page at Mediawiki:Breadcrumbs on my media wiki like this: * Finance @ Nlpedia > Finance >
 * Business @ Nlpedia > Finance > Business >

As a result I got breadcrumbs, but it only displays the lowest level for current page(the name of the article or category) but there's no link to the main page (or category when I'm in an article). Am I missing something here? Did I make some syntax error? Are there any additional things I should to make it work?

September 2009 -- Still getting this behavior in MW 1.13 -- anyone have this working?

January 2010 -- Doing same for me with MW 1.15.1 -- would love to see a fix to get this working, seems to be when using name > name2 > that it does not show all sub-pages if they are categories.

New Features
I made a few small modifications to the extension to allow:
 * Breadcrumbs to be placed by the template (Crumb result is passed to template via $template->data['breadcrumbs'] instead of subtitle; requires custom template to use and display). So you don't have to give up the subtitle to use the breadcrumbs extension. Access via $this->data['breadcrumbs'] in execute method of skin file.
 * MediaWiki:Breadcrumbs crumb specification to match page name (So, for example, "* Main Page @ Home" will provide a custom breadcrumb for the home page).
 * Require inclusion of the page name to be explicit in the crumb spec (using ), so it can be left out if you want to.

Modified lines (x3) are marked with **** function buildBreadcrumbs( $skin, $template ) { # Get the list of categories for the current page preg_match_all( '`title="Category:(.*?)"`', $skin->getCategories, $matches, PREG_PATTERN_ORDER ); $categories = $matches[1]; # Treat the namespace as a category too if ( $skin->mTitle->getNsText ) $categories[] = $skin->mTitle->getNsText; # ****: Treat the page name as a category too $categories[] = $skin->mTitle->getText; # Load and parse the breadcrumb template. If it's a redirected page, extract redirect info $crumbs = matchFirstCategory( CRUMBPAGE, $categories ); $breadcrumb = trim( $crumbs[0] ); # ****: Require page name to be explicitly set if ( preg_match('/\(Redirected.*?\)/', $template->data['subtitle'], $match) ) $breadcrumb .= ' '. $match[0]; # Set the page subtitle to the breadcrumb contents $template->set( 'breadcrumbs', $breadcrumb ); # ****: Store in breadcrumbs data object.

Debug Info?
I am having problems getting this extension to work with MW1.15. All indications seem to point to the extension working but I do not get the rewriting of the subtitle as I would expect it to. Is there any way to debug the extension to see if it is working correctly? I am afraid that it might not be able to call the hook to rewrite the subtitle, perhaps due to something in my setup.

I believe I am doing everything correctly:
 * Writing the breadcrumbs into MediaWiki:Breadcrumbs
 * Category tags on the pages that I want to apply the breadcrumbs to
 * All PHP scripts have permission 755
 * Special:Version shows that version 0.9 of the extension is installed

However the subtitle will not change on the pages no matter what.

Any suggestions?

''Edit: Okay, that was silly. I just noticed that if the category page is not saved, then it won't work. Silly mistake. Anyway, just leaving this up in case other people have similar trouble. Just save the category page with placeholder text.''