尝试以下操作：

        $pages = get_posts();

        $page_ids_to_swap_the_template = array( 1, 2, 3, etc... );

        foreach ( $pages as $page ) {
            if ( in_array( $page->ID, $page_ids_to_swap_the_template ) ) {
                update_post_meta( $page->ID, \'_wp_page_template\', \'new_template.php\' );
            }
        }