ID); $category_ID = array(); foreach($categories as $category) : array_push($category_ID, $category->cat_ID); endforeach; $args = array( 'category__in' => $category_ID, 'orderby' => 'rand', 'post__not_in' => array($post->ID), 'posts_per_page' => related_post_num() ); $my_query = new WP_Query($args); if($my_query->have_posts()) : while($my_query->have_posts()) : $my_query->the_post(); ?>