现有用户角色更改时WordPress电子邮件警报（不向新用户发送电子邮件）

Question

On my WordPress website I use this code in my theme's functions.php file to send automatic email to users when their role has been changed. The roles are updated manually by the administrator.

function user_role_update( $user_id, $new_role ) {
        $site_url = get_bloginfo('wpurl');
        $user_info = get_userdata( $user_id );
        $to = $user_info->user_email;
        $subject = "Role changed: ".$site_url."";
        $message = "Hello " .$user_info->display_name . " your role has changed on ".$site_url.", congratulations you are now an " . $new_role;
        wp_mail($to, $subject, $message);
}
add_action( 'set_user_role', 'user_role_update', 10, 2);

This piece of code works fine, apart from one thing - new users also receive email notifications about the role change upon registration! It's very confusing.

Is there a way to avoid sending this email to new users?

Answer 1

You can retrieve the time that the user object was created by inspecting $user_info->user_registered.

So you could wrap at least the wp_mail line of your code in an if block like this to suppress notifications to newly registered users:

if ( strtotime ( $user_info->user_registered) < strtotime ('-30 minutes') ) {
  //send email
}