我来这里是为了实现：
- 为 post_type 帖子添加页面属性以添加父帖子
- 能够将页面模板添加到 post_type 帖子
- 能够获得 post_type 帖子的分层永久链接结构
我可以使用the accepted answer 完成 1 和 2，但不能完成 3。
注意：要完全让 2 工作，您需要在页面模板的模板 cmets 中指定 post_type，如下所示：
<?php
/*
Template Name: Your Post Template Name
Template Post Type: post
*/
对于 3，我发现一个插件破坏了我的 post_type 页面，而且它有很多非常糟糕、无人维护的代码。
所以我写了一个解决方案来完成这一切，借用this answer：
（用 4.9.8 测试）
<?php
add_action('registered_post_type', 'make_posts_hierarchical', 10, 2 );
// Runs after each post type is registered
function make_posts_hierarchical($post_type, $pto){
// Return, if not post type posts
if ($post_type != 'post') return;
// access $wp_post_types global variable
global $wp_post_types;
// Set post type "post" to be hierarchical
$wp_post_types['post']->hierarchical = 1;
// Add page attributes to post backend
// This adds the box to set up parent and menu order on edit posts.
add_post_type_support( 'post', 'page-attributes' );
}
/**
* Get parent post slug
*
* Helpful function to get the post name of a posts parent
*/
function get_parent_post_slug($post) {
if (!is_object($post) || !$post->post_parent) {
return false;
}
return get_post($post->post_parent)->post_name;
}
/**
*
* Edit View of Permalink
*
* This affects editing permalinks, and $permalink is an array [template, replacement]
* where replacement is the post_name and template has %postname% in it.
*
**/
add_filter('get_sample_permalink', function($permalink, $post_id, $title, $name, $post) {
if ($post->post_type != 'post' || !$post->post_parent) {
return $permalink;
}
// Deconstruct the permalink parts
$template_permalink = current($permalink);
$replacement_permalink = next($permalink);
// Find string
$postname_string = '/%postname%/';
// Get parent post
$parent_slug = get_parent_post_slug($post);
$altered_template_with_parent_slug = '/' . $parent_slug . $postname_string;
$new_template = str_replace($postname_string, $altered_template_with_parent_slug, $template_permalink);
$new_permalink = [$new_template, $replacement_permalink];
return $new_permalink;
}, 99, 5);
/**
* Alter the link to the post
*
* This affects get_permalink, the_permalink etc.
* This will be the target of the edit permalink link too.
*
* Note: only fires on "post" post types.
*/
add_filter('post_link', function($post_link, $post, $leavename){
if ($post->post_type != 'post' || !$post->post_parent) {
return $post_link;
}
$parent_slug = get_parent_post_slug($post);
$new_post_link = str_replace($post->post_name, $parent_slug . '/' . $post->post_name, $post_link);
return $new_post_link;
}, 99, 3);
/**
* Before getting posts
*
* Has to do with routing... adjusts the main query settings
*
*/
add_action('pre_get_posts', function($query){
global $wpdb, $wp_query;
$original_query = $query;
$uri = $_SERVER['REQUEST_URI'];
// Do not do this post check all the time
if ( $query->is_main_query() && !is_admin()) {
// get the post_name
$basename = basename($uri);
// find out if we have a post that matches this post_name
$test_query = sprintf("select * from $wpdb->posts where post_type = '%s' and post_name = '%s';", 'post', $basename);
$result = $wpdb->get_results($test_query);
// if no match, return default query, or if there's no parent post, this is not necessary
if (!($post = current($result)) || !$post->post_parent) {
return $original_query;
}
// get the parent slug
$parent_slug = get_parent_post_slug($post);
// concat the parent slug with the post_name to get most of the url
$hierarchal_slug = $parent_slug . '/' . $post->post_name;
// if the concat of parent-slug/post-name is not in the uri, this is not the right post.
if (!stristr($uri, $hierarchal_slug)) {
return $original_query;
}
// pretty high confidence that we need to override the query.
$query->query_vars['post_type'] = ['post'];
$query->is_home = false;
$query->is_page = true;
$query->is_single = true;
$query->queried_object_id = $post->ID;
$query->set('page_id', $post->ID);
return $query;
}
}, 1);
您可以将其保存到文件custom-posts-hierarchy.php 并将其包含在主题的functions.php 文件中，或者您可以添加到顶部：
/*
Plugin Name: Custom Posts Hierarchy
Plugin URI:
Description: Add page attributes to posts and support hiearchichal
Author: Angela Murrell
Version:
Author URI:
*/
并将其放入您的插件文件夹中。祝你好运！