WP_Query about meta_key and its array value
Try this $args = array( ‘post_type’ => ‘book’, ‘posts_per_page’ => -1, ); $query = new WP_Query($args); while($query->have_posts() ) : $query->the_post(); $date = get_post_meta( get_the_ID(), ‘date_all’, true ); if($date[‘year’] >= 2018 && $date[‘month’] == 3){ the_title(); } endwhile; wp_reset_query();