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1. jakethebear
   Member
   Posted 4 months ago #
   

   this is something that should be stupidly easy, but i can't find a straight answer, and the documentation on 'wp get post categories' is pretty rubbish. i'm looking to get all the id's of all the categories assigned to a single post in order to use them as classes. any help much appreciated. thanks in advance.

2. alchymyth
   The Sweeper & Moderator
   Posted 4 months ago #
   

   http://codex.wordpress.org/Function_Reference/wp_get_post_categories

   where exactly did you get stuck with that Codex chapter?

   what code have you tried?

   alternatively, consider using get_the_category() http://codex.wordpress.org/Function_Reference/get_the_category

3. jakethebear
   Member
   Posted 4 months ago #
   

   get_the_category() worked perfectly, thank you. For some reason I couldn't get wp_get_post_categories() to work, no matter how I tried implementing it.

   If anyone else is looking to do the same thing and use a specific post's category ID's as classes, here's my code:

   <?php
   $categories = get_the_category();
   $separator = ' ';
   $classes = '';
   if($categories){
      foreach($categories as $category) {
         $classes .= 'cat-'.$category->term_id.$separator;
      }
   }
   ?>
   
   <div class="<?php echo trim($classes, $separator); ?>">
      DIV CONTENT
   </div>

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