Php 以编程方式将文件上载到WordPress中的用户

我正在使用pods插件向用户添加新的自定义字段，所以我添加了4个文件自定义字段，然后尝试从注册页面将文件上载到此字段并创建新用户。但是当我上传文件时，它没有生成所有大小的图像，当从管理面板打开新用户时，图像没有显示，但是名称是，并且创建了图像帖子。请帮忙，谢谢

我的代码：

 $uploadfiles = upload_files();

                $metas = array(
                    'uploadfiles1' => $uploadfiles[0]['attach_id'],
                    'uploadfiles2' => $uploadfiles[1]['attach_id'],
                    'uploadfiles3' => $uploadfiles[2]['attach_id'],
                    'uploadfiles4' => $uploadfiles[3]['attach_id'],

                );

                foreach ($metas as $key => $value) {
                    update_user_meta($user_id, $key, $value);
                }

上传文件功能：

function upload_files(){
        $files_uploaded = array();
        $files = $_FILES;
        $files_extensions = ["image/png", "image/jpeg", "image/bmp", "image/jpg", "application/pdf"];

        $is_files_checked = check_upload_files($files, $files_extensions, 5);

        if ($is_files_checked) {

            foreach ($files as $key => $file) {

                $file_name = get_file_name($key);
                $upload_file_name = ($_POST['registration_fname'] . '_' . (!empty($_POST['registration_mname']) ? $_POST['registration_mname'] . '_' : '') . $_POST['registration_lname'] . '_' . $file_name . '_' . time() . get_file_extension($file['type']));
                $upload_dir = wp_upload_dir();

                if (move_uploaded_file($file["tmp_name"], $upload_dir['path'] . "/" . $upload_file_name)) {

                $uploaded_file['file_name'] = $file_name;
                $uploaded_file['upload_url'] = $upload_dir['url'] . "/" . $upload_file_name;

                $attachment = array(
                    'guid'           => $uploaded_file['upload_url'],
                    'post_mime_type' => $file['type'],
                    'post_title'     => $upload_file_name,
                    'post_content'   => '',
                    'post_status'    => 'inherit'
                );

                $uploaded_file['attach_id'] = wp_insert_attachment( $attachment , $upload_dir['path']);
                require_once( ABSPATH . 'wp-admin/includes/image.php' );

                //Generate the metadata for the attachment, and update the database record.
                $attach_data = wp_generate_attachment_metadata( $uploaded_file['attach_id'] , $upload_dir['path']);
                wp_update_attachment_metadata( $uploaded_file['attach_id'], $attach_data);

                $files_uploaded[] = $uploaded_file;
            }
        }
        return $files_uploaded;
        } else {
            //$is_files_checked files error....
            return $is_files_checked;
        }
}

---

它只是缺少了

$upload\u dir['path']。"/" . $在中上载文件名

            $uploaded_file['attach_id'] = wp_insert_attachment($attachment, $upload_dir['path'] . "/" . $upload_file_name);
            require_once(ABSPATH . 'wp-admin/includes/image.php');

            //Generate the metadata for the attachment, and update the database record.
            $attach_data = wp_generate_attachment_metadata($uploaded_file['attach_id'], $upload_dir['path'] . "/" . $upload_file_name);

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