add_filter( 'the_title', 'shorten_woo_product_title', 10, 2 ); function shorten_woo_product_title( $title, $id ) {    if ( ! is_singular( array( 'product' ) ) && get_post_type( $id ) === 'product' ) {        return substr( $title, 0, 30).'...'; // change last number to the number of characters you want    } else {        return $title;    } }