In member.php find:
"file_name" => $new_name,
Insert below:
"user_id" => $user_info['user_level'] == GUEST ? "" : $user_info['user_id'],
"user_name" => $user_info['user_level'] == GUEST ? $lang['userlevel_guest'] : format_text($user_info['user_name'], 2),
"user_url" => $user_info['user_level'] == GUEST ? "" : $script_url."member.php?action=showprofile&".URL_USER_ID."=".$user_info['user_id'],
Now you can use {user_id}, {user_name} and {user_url} tags