The two functions below are designed to return a list of posts that share the same category as the current post being viewed in single.php
However, when I var_dump on $cat (should be a list of the categories assigned to the current post), I’m not getting what I’m expecting. Do I need to deserialize the array before passing it to the get_posts query?
function get_cats()
{
$post_cats= array();
$categories = get_the_category();
foreach($categories as $cat){
array_push($post_cats, $cat->cat_ID);
}
return $post_cats;
}
//get related posts by category
function ce4_get_related_by_category()
{
global $post;
$cat = implode(',',get_cats());
$catHidden=get_cat_ID('hidden');
$myqueryCurrent = new WP_Query();
$myqueryCurrent->query(array('cat' => "$cat,-$catHidden",'post__not_in' => get_option('sticky_posts')));
$totalpostcount = $myqueryCurrent->found_posts;
if($totalpostcount > 0)
{
echo "<ul>";
$myposts = get_posts(array('cat' => "$cat,-$catHidden",'numberposts' => $cb2_current_count));
foreach($myposts as $idx=>$post)
{
?>
<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a><?php the_excerpt(); ?></li>
<?php
}
echo "</ul>";
}
}
You can use get_the_category()
It will return an array of category IDs belonging to the current post.
Then the $post_cats array will have a list of all the ids.
You can fetch array of IDs alone like this with
wp_get_object_terms()
:Note that
get_the_category()
caches results and getting IDs from its return might actually be more efficient than fetching IDs separately with this.