在 WordPress 经典和块编辑器中过滤内容以从自定义字段加载内容

问：

这个让我难住了。

我正在将数据卸载到名为 的自定义字段。请参阅问题末尾的课程，看看我是怎么做到的。wp_posts > post_contentpost_content

我正在尝试过滤加载到我的经典编辑器或块编辑器中的内容，因此内容实际上是从我的自定义字段加载的，称为 ，而不是从默认表加载。post_contentwp_posts

我已经尝试了这 3 个过滤器和操作（不是同时进行的，也没有运气）......

add_action('edit_form_after_title', [ $this, 'load_custom_post_content_editor' ]);
    
public function load_custom_post_content_editor($post) {
        // Check if the post type is 'post' or 'page'
        if (in_array($post->post_type, array('post', 'page'))) {
            $custom_post_content = get_post_meta($post->ID, 'post_content', true);
            if (!empty($custom_post_content)) {
                $post->post_content = $custom_post_content;
            }
        }
    }

add_action('wp_insert_post_data', [ $this, 'modify_post_data' ], 10, 2);

public function modify_post_data($data, $postarr) {
        // Check if the post type is allowed.
        if (in_array($data['post_type'], self::$allowed_post_types)) {
            $custom_post_content = get_post_meta($postarr['ID'], 'post_content', true);
            if (!empty($custom_post_content)) {
                $data['post_content'] = $custom_post_content;
            }
        }
        return $data;
    }

add_filter('block_editor_content', [ $this, 'filter_block_editor_content' ], 10, 2);

public function filter_block_editor_content($content, $post) {
        // Check if the post type is allowed.
        if ($post && in_array($post->post_type, self::$allowed_post_types)) {
            $custom_post_content = get_post_meta($post->ID, 'post_content', true);
            if (!empty($custom_post_content)) {
                $content = $custom_post_content;
            }
        }
        return $content;
    }

这些都没有成功从 WordPress 编辑器中的自定义字段加载内容，即使字段中存在带有块编辑器内容代码的“post_content”自定义字段。

在这里，我的工作班的其余部分将帖子内容卸载到在管理员中保存帖子/页面时调用的自定义字段......post_content

<?php
/**
 * Plugin Name: WP JSON Search
 * Description: The WP JSON Search plugin allows you to search your WordPress website by merging complete post content, custom fields, and taxonomies into a single JSON string, which is then stored in your post_content in wp_posts table.
 * Version: 1.0
 * Author: Josh Cranwell
 * Author URI: https://github.com/joshmoto
 */

class WP_JSON_Search {

    /**
     * @var array|string[] Allowed post types to save json search content.
     */
    private static array $allowed_post_types = ['post', 'page'];

    /**
     * WP_JSON_Search constructor.
     */
    public function __construct () {

        // Save post_content to custom meta field when saving a draft or publishing a post/page.
        add_action('save_post', [ $this, 'save_post_content' ], 10, 2);

        // Filter the content to get data from the custom meta field.
        add_filter('the_content', [ $this, 'filter_the_content' ]);

    }

    /**
     * Save post_content to custom meta field when saving a draft or publishing a post/page.
     * @param $post_id
     * @param $post
     * @return void
     */
    public function save_post_content($post_id, $post): void
    {

        // Check if the post type is allowed.
        if (in_array($post->post_type, self::$allowed_post_types)) {

            // Set the post_content to the custom meta field.
            $post_content = $post->post_content;
            update_post_meta($post_id, 'post_content', $post_content);
            $post->post_content = ''; // Empty the default post_content field.

            // Unhook this function so it doesn't loop infinitely.
            remove_action('save_post', [ $this, 'save_post_content' ]);

            // Update the post, which calls save_post again.
            wp_update_post($post);

            // Re-hook this function.
            add_action('save_post', [ $this, 'save_post_content' ]);

        }
    }

    /**
     * Filter the content to get data from the custom meta field.
     * @param $content
     * @return mixed
     */
    public function filter_the_content($content): mixed
    {

        // Get the current post.
        global $post;

        // Check if the post type is allowed.
        if ($post && in_array($post->post_type, self::$allowed_post_types)) {

            // Get the post_content from the custom meta field.
            $custom_post_content = get_post_meta($post->ID, 'post_content', true);
            if (!empty($custom_post_content)) {
                $content = $custom_post_content;
            }
        }

        // Return the content.
        return $content;
    }

}

new WP_JSON_Search();

如果有人对我如何在编辑器中过滤内容以从自定义字段加载数据有任何建议，那将非常有用。