How to get a post categories outside the loop ?

  • Resolved guischarf

    (@guischarf)


    16 years, 2 months ago

    Hi,

    I am working on a template that uses different navigation bars for different categories. When displaying category pages (archive.php) I have no problems finding out which category navbar to display. This is the code I use in header.php:

    if (is_category()):
   $catID = get_cat_id(single_cat_title('', FALSE));
   $actualcat = get_category($catID);
   if ($actualcat->parent != 0):
      $catID = $actualcat->parent;
   endif;
...

    However, if I am in single.php I cannot find a way to get the categories of the post. This is the complete code I intend to use:

    if (is_home()):
   wp_list_categories('title_li=&depth=1');
else:
   if (is_category()):
      $catID = get_cat_id(single_cat_title('', FALSE));
      $actual_cat = get_category($catID);
      if ($actual_cat->parent != 0):
         $catID = $actual_cat->parent;
      endif;
   elseif (is_single());
      HOW DO I GET THE CATEGORIES
   endif;
   wp_list_categories('title_li=&depth=1&child_of='.$catID);
endif;

    Any ideas?

Viewing 2 replies - 1 through 2 (of 2 total)

  • I used this for something once that should give you what you want:

    <?php
if (is_single( )) {
  $ID = $wp_query->posts[0]->ID;
  $postcat = get_the_category($ID);
  $cat = $postcat[0]->cat_ID;
  $parent = get_category ($cat);
    if ($parent->parent) {
      wp_list_categories ('child_of=' . $parent->parent);
      } else {
      wp_list_categories ('child_of=' . $cat);
    }
  }
?>
    Thread Starter guischarf

    (@guischarf)

    Thanks Michael. I will try that out. I ended up doing the following, but your solution seems way more elegant.

    ...
elseif (is_single()):
   if (have_posts()) :
      while (have_posts()) :
         the_post();
         foreach (get_the_category() as $thecat):
            if ($thecat->parent != 0):
               $catIDarray[] = $thecat->parent;
            else:
               $catIDarray[] = $thecat->cat_ID;
            endif;
         endforeach;
         //if more than one category, write an algo to selec one according to a priority table.
         $catID = $catIDarray[0];
      endwhile;
   endif;
 endif;
Viewing 2 replies - 1 through 2 (of 2 total)
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