WordPress 修改自定义文章类型的固定链接结构

/**
 * 设置 book 这种自定义文章类型的固定链接结构为 ID.html 
 * https://www.wpdaxue.com/custom-post-type-permalink-code.html
 */
add_filter('post_type_link', 'custom_book_link', 1, 3);
function custom_book_link( $link, $post = 0 ){
    if ( $post->post_type == 'book' ){
        return home_url( 'book/' . $post->ID .'.html' );
    } else {
        return $link;
    }
}
add_action( 'init', 'custom_book_rewrites_init' );
function custom_book_rewrites_init(){
    add_rewrite_rule(
        'book/([0-9]+)?.html$',
        'index.php?post_type=book&p=$matches[1]',
        'top' );
    add_rewrite_rule(
        'book/([0-9]+)?.html/comment-page-([0-9]{1,})$',
        'index.php?post_type=book&p=$matches[1]&cpage=$matches[2]',
        'top'
        );
}

/**
 * 设置多种自定义文章类型的固定链接结构为 ID.html
 * https://www.wpdaxue.com/custom-post-type-permalink-code.html
 */
$mytypes = array(//根据需要添加你的自定义文章类型
    'type1' => 'slug1',
    'type2' => 'slug2',
    'type3' => 'slug3'
    );
add_filter('post_type_link', 'my_custom_post_type_link', 1, 3);
function my_custom_post_type_link( $link, $post = 0 ){
    global $mytypes;
    if ( in_array( $post->post_type,array_keys($mytypes) ) ){
        return home_url( $mytypes[$post->post_type].'/' . $post->ID .'.html' );
    } else {
        return $link;
    }
}
add_action( 'init', 'my_custom_post_type_rewrites_init' );
function my_custom_post_type_rewrites_init(){
    global $mytypes;
    foreach( $mytypes as $k => $v ) {
        add_rewrite_rule(
            $v.'/([0-9]+)?.html$',
            'index.php?post_type='.$k.'&p=$matches[1]',
            'top'
            );
        add_rewrite_rule(
            $v.'/([0-9]+)?.html/comment-page-([0-9]{1,})$',
            'index.php?post_type='.$k.'&p=$matches[1]&cpage=$matches[2]',
            'top'
            );
    }
}