WordPress页面伪静态化

function html_page_permalink() {
    global $wp_rewrite;
        if (!strpos($wp_rewrite->get_page_permastruct() , '.html')) {
            $wp_rewrite->page_structure = $wp_rewrite->page_structure . '.html';
        }
}
add_action('init', 'html_page_permalink', -1);