'post', 'posts_per_page' => 20, 'order' => 'ASC', 'meta_key' => '_gr_primary_checkbox' ); $myposts = get_posts( $args ); foreach( $myposts as $post ) : setup_postdata($post); ?>

'post', 'posts_per_page' => 3, 'meta_query' => array( 'relation' => 'OR', array( 'key' => '_gr_primary_checkbox', 'value' => false, 'type' => 'BOOLEAN' ), array( 'key' => '_gr_primary_checkbox', 'compare' => 'NOT EXISTS' ) )); $myposts = get_posts( $args ); foreach( $myposts as $post ) : setup_postdata($post); ?>
ID), 'full' ); $url = $thumb['0']; ?>