Display commenter's registration date on comments?

Question

Is there any way to display a user's (registered) registration date on the comment.

Lets say i have a written an article, registered users A, B, C and D left a comment on my article.

I can display comment date, commenter's name and email by default .

I want to display the commenter's registration date also.

How can this be done?

Answer 1

In your wp_list_comments callback function, you can call get_userdata to get any additional comment author data:

$userdata = get_userdata( $comment->user_id );
echo 'Registered: ' . $userdata->user_registered;

// format the date
// Sunday January 13th 2013
echo 'Registered: ' . date( 'l F jS Y', strtotime( $userdata->user_registered ) );

Answer 2

All the information you need is in the user Object pulled by get_user_by.

$user = get_user_by('login','login-name');
var_dump($user);

The information may already be available though. Check your theme carefully to see what information has already been pulled.