Echo the number of posts being displayed
rearrange your code and use post_count; example: <?php $movieNumber = 1; $today = date(‘Ymd’); $posts = array ( ‘post_type’ => ‘movie’, ‘posts_per_page’ => -1, ); $loop = new WP_Query( $posts ); ?> <div id=”posters<?php echo $loop->post_count; ?>”> <?php while ( $loop->have_posts() ) : $loop->the_post(); …etc…