Inpsyde\MultilingualPress\SiteDuplication\WPDBAttachmentCopier::copy_attachments PHP Метод

    public function copy_attachments($source_site_id)
    {
        $destination_dir = $this->base_path_adapter->basedir();
        switch_to_blog($source_site_id);
        $source_dir = $this->base_path_adapter->basedir();
        if (!(is_dir($source_dir) && is_readable($source_dir))) {
            restore_current_blog();
            return false;
        }
        $attachment_paths = $this->get_attachment_paths();
        if (!$attachment_paths) {
            restore_current_blog();
            return false;
        }
        $this->found_files = false;
        array_walk($attachment_paths, function (array $paths, $dir) use($source_dir, $destination_dir) {
            $this->copy_dir($paths, "{$source_dir}/{$dir}", "{$destination_dir}/{$dir}");
        });
        if ($this->found_files) {
            $source_url = $this->base_path_adapter->baseurl();
            restore_current_blog();
            $this->update_attachment_urls($source_url, $this->base_path_adapter->baseurl());
            return true;
        }
        restore_current_blog();
        return false;
    }