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1. Basty
   Member
   Posted 7 months ago #

   Greetings!

   Is there any way to list all categories (not only those for the current post) on a post's page (single.php)?

   I've been searching for 5 hours now and found no solution, every query I've tried relates to the current post / loop.

   Thank you!

2. keesiemeijer
   moderator
   Posted 7 months ago #

   http://codex.wordpress.org/Template_Tags/wp_list_categories
   http://codex.wordpress.org/Function_Reference/get_categories

3. Basty
   Member
   Posted 7 months ago #

   Tried both solutions, they only retrieve categories for the current post for some reason.

   I need to list all categories, not just those for the current post, both empty or not.

4. keesiemeijer
   moderator
   Posted 7 months ago #

   If <?php wp_list_categories(); ?> only gives categories of the current post.

   try:
   - deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).

   - switching to the default theme to rule out any theme-specific problems?

5. Basty
   Member
   Posted 7 months ago #

   Thank you for your prompt replies, keesiemeijer.

   I've modified single.php on the default theme before activating it and wp_list_categories(); works as it's supposed to.

   Now I'm digging through the other theme's code to find the culprit.

   Hopefully it's nothing too silly that's preventing wp_list_categories(); from working properly or I'll look like a complete fool.

6. keesiemeijer
   moderator
   Posted 7 months ago #

   What theme are you using?

7. Basty
   Member
   Posted 7 months ago #

   A custom theme, started by someone else and taken over by yours truly.

8. keesiemeijer
   moderator
   Posted 7 months ago #

   Is there something simular to: add_filter('wp_list_categories', 'function_name'); in your functions.php

9. Basty
   Member
   Posted 7 months ago #

   Yes, keesiemeijer that's exactly what it was. A function filtering the output of wp_list_categories(). I missed it on the first pass because of spaghetti code.

   Thank you for your support, much appreciated!

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