Pressbooks\Modules\Import\WordPress\Wxr::importPbPostMeta PHP Метод

    protected function importPbPostMeta($pid, $post_type, $p)
    {
        if ('metadata' == $post_type) {
            $this->importMetaBoxes($pid, $p);
        } elseif ('part' == $post_type) {
            $part_content = $this->searchForMetaValue('pb_part_content', $p['postmeta']);
            if ($part_content) {
                update_post_meta($pid, 'pb_part_content', $part_content);
            }
        } else {
            $meta_to_update = apply_filters('pb_import_metakeys', array('pb_section_author', 'pb_section_license', 'pb_short_title', 'pb_subtitle'));
            foreach ($meta_to_update as $meta_key) {
                $meta_val = $this->searchForMetaValue($meta_key, $p['postmeta']);
                if (is_serialized($meta_val)) {
                    $meta_val = unserialize($meta_val);
                }
                if ($meta_val) {
                    update_post_meta($pid, $meta_key, $meta_val);
                }
            }
        }
    }