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1. timetraveller
   Member
   Posted 9 months ago #

   Hi guys,

   I am trying to get to change the image class of my child-theme. I am using Twenty-Eleven as the main theme.

   I searched around and found this:
   http://core.trac.wordpress.org/browser/tags/3.2.1/wp-includes/media.php

   On line 225 is where the filter is: $class = apply_filters('get_image_tag_class', $class, $id, $align, $size);

   Beauty! So I went ahead and did this in my functions.php:

   function change_image_tag_class($class_name)
   {
   $class_name = 'colorbox';
   return $class_name;
   }

   add_filter('get_image_tag_class','change_image_tag_class');

   But when i refresh my screen, the image class hasn't changed... what am I doing wrong?

   Btw, I started using wordpress only about a week and a half ago. Maybe my understanding of filters is murky? Actions I can understand. You "do_action()" first and have it in some section of the code. Then you go ahead and create a "add_action()" so it does that action at the point where do_action() is...

   Or even that is wrong?

   Please help! It's driving me nuts! I'm trying to use colorbox and I dont wanna use plugins, I wanna do this on my own...

   Many thanks!!!

   [i apologize if this has been asked already...]

2. timetraveller
   Member
   Posted 9 months ago #

   So i guess my add filter was correct, only that it would only apply the class to the FIRST image(s) uploaded- if you had pre-existing images, it would not work. So that definitely sucks.

   The manual way is to go ahead and add a class under the media Advanced Settings area but thats too much work. If I'm building a site for a client, they will most likely forget to do that.

   Anybody? Any solutions?

   Thanks!

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