因此，我目前正在一个客户端网站上工作，试图将一些旧帖子转换为使用新的自定义帖子类型。在此之前，她的网站是以这样一种方式建立的，即她可以在网站上添加带有章节的书籍以及未分类的建议栏。为了添加这两个项目中的任何一个，她会添加一个新帖子，并将其粘贴到特定类别中。如果她想让这篇文章在她的书中以章节的形式出现，她会将其归入“图书”类别的正确子类别。如果她想让帖子出现在她的建议栏中，她会将其添加到“建议”类别中。

该网站的永久链接是这样设置的：当阅读一本书的某一章时，它看起来是这样的

现在，我正试着重新为她做一些准备。我没有简单地添加一篇新帖子并对其进行分类以达到这种效果，而是将这两个不同的领域划分为各自的自定义帖子类型（称为章和列）。在设置新的自定义帖子类型时，我试图将rewrite参数设置为使用以前使用的相同永久链接，但似乎即使删除了类别，永久链接仍由类别保留。我的意思是，我在尝试访问“/书籍/书籍/章节”时收到404，但如果我将重写更改为使用“章节”或其他基础，它就会起作用。

主要是我想知道是否有办法解决这个问题，以及是什么导致了这个问题。这与最初添加CPT时该类别仍然存在这一事实有关，但我不能完全确定。

以下是您可以看到其实际应用的网站：http://dev1.abileneloving.com

以下是我的CPT/海关税/海关永久链接结构代码：

function chapter_post_type_init() {
        $labels = array(
                \'name\' => \'Chapters\',
                \'singular_name\' => \'Chapter\',
                \'add_new\' => \'Add New\',
                \'add_new_item\' => \'Add New Chapter\',
                \'edit_item\' => \'Edit Chapter\',
                \'new_item\' => \'New Chapter\',
                \'all_items\' => \'All Chapters\',
                \'view_item\' => \'View Chapter\',
                \'search_items\' => \'Search Chapters\',
                \'not_found\' =>  \'No chapters found\',
                \'not_found_in_trash\' => \'No chapters found in Trash\',
                \'parent_item_colon\' => \'\',
                \'menu_name\' => \'Books\'
        );

        $args = array(
                \'labels\' => $labels,
                \'public\' => true,
                \'publicly_queryable\' => true,
                \'show_ui\' => true,
                \'show_in_menu\' => true,
                \'query_var\' => true,
                \'rewrite\' => array( \'slug\' => \'books/%book_type%\'),
                \'capability_type\' => \'post\',
                \'has_archive\' => true,
                \'hierarchical\' => false,
                \'menu_position\' => 100,
                \'supports\' => array( \'title\', \'editor\', \'author\', \'excerpt\')
        );
        register_post_type( \'chapter\', $args );
}
add_action( \'init\', \'chapter_post_type_init\' );

function book_tax_init() {
        $labels = array(
                \'name\'              => _x( \'Books\', \'taxonomy general name\' ),
                \'singular_name\'     => _x( \'Book\', \'taxonomy singular name\' ),
                \'search_items\'      => __( \'Search Books\' ),
                \'all_items\'         => __( \'All Books\' ),
                \'edit_item\'         => __( \'Edit Book\' ),
                \'update_item\'       => __( \'Update Book\' ),
                \'add_new_item\'      => __( \'Add New Book\' ),
                \'new_item_name\'     => __( \'New Book Name\' ),
                \'menu_name\'         => __( \'Books\' ),
        );

        $args = array(
                \'hierarchical\'      => true,
                \'labels\'            => $labels,
                \'show_ui\'           => true,
                \'show_admin_column\' => true,
                \'query_var\'         => true,
                \'rewrite\' => array( \'slug\' => \'books/%book_type%\')
        );
        register_taxonomy(
                \'book\',
                \'chapter\',
                $args
        );
}

add_action( \'init\', \'book_tax_init\' );

add_filter(\'post_type_link\', \'book_permalink_structure\', 10, 4);
function book_permalink_structure($post_link, $post, $leavename, $sample)
{
    if ( false !== strpos( $post_link, \'%book_type%\' ) ) {
        $book_type_term = wp_get_object_terms( $post->ID, \'book\' );
        $post_link = str_replace( \'%book_type%\', array_pop( $book_type_term )->slug, $post_link );
    }
    return $post_link;
}

Update - New Code

function chapter_post_type_init() {
        $labels = array(
                \'name\' => \'Chapters\',
                \'singular_name\' => \'Chapter\',
                \'add_new\' => \'Add New\',
                \'add_new_item\' => \'Add New Chapter\',
                \'edit_item\' => \'Edit Chapter\',
                \'new_item\' => \'New Chapter\',
                \'all_items\' => \'All Chapters\',
                \'view_item\' => \'View Chapter\',
                \'search_items\' => \'Search Chapters\',
                \'not_found\' =>  \'No chapters found\',
                \'not_found_in_trash\' => \'No chapters found in Trash\',
                \'parent_item_colon\' => \'\',
                \'menu_name\' => \'Books\'
        );

        $args = array(
                \'labels\' => $labels,
                \'public\' => true,
                \'publicly_queryable\' => true,
                \'show_ui\' => true,
                \'show_in_menu\' => true,
                \'query_var\' => true,
                \'rewrite\' => array( \'slug\' => \'books/%book%\'),
                \'capability_type\' => \'post\',
                \'has_archive\' => true,
                \'hierarchical\' => false,
                \'menu_position\' => 100,
                \'supports\' => array( \'title\', \'editor\', \'author\', \'excerpt\')
        );
        register_post_type( \'chapter\', $args );
}
add_action( \'init\', \'chapter_post_type_init\' );

function book_tax_init() {
        $labels = array(
                \'name\'              => _x( \'Books\', \'taxonomy general name\' ),
                \'singular_name\'     => _x( \'Book\', \'taxonomy singular name\' ),
                \'search_items\'      => __( \'Search Books\' ),
                \'all_items\'         => __( \'All Books\' ),
                \'edit_item\'         => __( \'Edit Book\' ),
                \'update_item\'       => __( \'Update Book\' ),
                \'add_new_item\'      => __( \'Add New Book\' ),
                \'new_item_name\'     => __( \'New Book Name\' ),
                \'menu_name\'         => __( \'Books\' ),
        );

        $args = array(
                \'hierarchical\'      => true,
                \'labels\'            => $labels,
                \'show_ui\'           => true,
                \'show_admin_column\' => true,
                \'query_var\'         => true,
                \'rewrite\' => array( \'slug\' => \'books\')
        );
        register_taxonomy(
                \'book\',
                \'chapter\',
                $args
        );
}

add_action( \'init\', \'book_tax_init\' );

add_filter(\'post_type_link\', \'book_permalink_structure\', 10, 4);
function book_permalink_structure($post_link, $post, $leavename, $sample)
{
    if ( false !== strpos( $post_link, \'%book%\' ) ) {
        $book_type_term = wp_get_object_terms( $post->ID, \'book\' );
        $post_link = str_replace( \'%book%\', array_pop( $book_type_term )->slug, $post_link );
    }
    return $post_link;
}