match 2 posts on categories

Question

I have blog posts each having 3 or more categories. The issue is that i need to search related posts to a post and i have to match at least 2 categories i.e. there must be 2 common categories. I am using this query

   $args = wp_parse_args($args, array(
    'showposts' => 10,
    'post__not_in' => array($post_id),
    'ignore_sticky_posts' => 1,
    'category__in' => wp_get_post_categories($post->ID)
));
    $query = new WP_Query($args);

I am trying category__in but it gives all posts which match even 1 category. Thanks for your help.

Answer 1

Perhaps try using 'category__and' instead?

E.g. 'category__and' => array(1,3)

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