Php 如何在新用户通知电子邮件中显示WordPress用户角色

我正在尝试修改wordpress新用户通知电子邮件给管理员，使用一些其他人在这里共享的代码。下面是我添加的内容，但在新的用户通知电子邮件中，它显示：“Role:Array”而不是Role值。有没有关于如何让它显示角色价值的建议

<?php
/*
Plugin Name: Custom New User Email
Description: Changes the copy in the email sent out to new users
*/
// Redefine user notification function
if ( !function_exists('wp_new_user_notification') ) {
function wp_new_user_notification( $user_id, $plaintext_pass = '' ) {
    $user = new WP_User($user_id);

    $user_login = stripslashes($user->user_login);
    $user_email = stripslashes($user->user_email);
    $user_info = get_userdata(1);

    $message  = sprintf(__('New user registration on %s:'), get_option('blogname')) . "\r\n\r\n";
    $message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
    $message .= sprintf(__('E-mail: %s'), $user_email) . "\r\n\r\n";
    $message .= sprintf(__('Role: %s'), $user_info->roles) . "\n";

    @wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), get_option('blogname')), $message);

}
}

?>

---

仅供参考，我找到了答案，并决定将其作为答案发布，以防有人有兴趣将其添加到新用户通知电子邮件中（仅发送给管理员）：

<?php
/*
Plugin Name: Custom New User Email
Description: Changes the copy in the email sent out to new users
*/
// Redefine user notification function
if ( !function_exists('wp_new_user_notification') ) {
    function wp_new_user_notification( $user_id, $plaintext_pass = '' ) {
    $user = new WP_User($user_id);

    $user_login = stripslashes($user->user_login);
    $user_email = stripslashes($user->user_email);
    $user_meta = get_userdata($user_id);
    $user_roles = $user_meta->roles;

    $message  = sprintf(__('New user registration on %s:'), get_option('blogname')) . "\r\n\r\n";
    $message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
    $message .= sprintf(__('E-mail: %s'), $user_email) . "\r\n\r\n";
    $message .= sprintf(__('Role: %s'), implode(', ',$user_meta->roles)) . "\n";


    @wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), get_option('blogname')), $message);

    if ( empty($plaintext_pass) )
        return;

    }
}

?>