[wp-hackers] Filtering pingbacks and trackbacks

Peter Westwood peter.westwood at ftwr.co.uk
Wed Aug 2 21:43:30 GMT 2006

Kimmo Suominen wrote:
> Hi!
> It looks like there are no filters for the contents of the outgoing
> pingbacks and trackbacks.  Have I just not looked in the right place?

There are no filters for trackbacks apart from the default content and
excerpt ones which won't really help.

> I'd like to be able to convert the contents of outgoing pingbacks and
> trackbacks to UTF-8 using iconv().
> I can already do the necessary charset conversion for incoming pingbacks
> and trackbacks using the preprocess_comment filter.  (I need to look at
> comment_type to avoid running iconv() on comments entered on the site
> itself, which must not be converted.)

You can't do this for pingbacks.

The ping'd site is what creates the excerpt that is shown not your site.

It works like this (taken from [1]):

1. Alice posts to her blog. The post she's made includes a link to a
post on Bob's blog.

2. Alice's blogging system contacts Bob's blogging system and says
"look, Alice made a post which linked to one of your posts".

3. Bob's blogging system then includes a link back to Alice's post on
his original post.

4. Reader's of Bob's article can follow this link to Alice's post to
read her opinion.


[1] http://www.hixie.ch/specs/pingback/pingback
Peter Westwood

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