Use tags like [FIRST_NAME] [LAST_NAME] in articles

Yea I have DirectPHP to use in articles , its the PHP code that I can not figure out how to get that membership_id to display.
Just starting PHP so I have been playing with these. I can pull in custom field from Membership Pro and joom user names and IDs.

<?php $user = JFactory::getUser();echo $user->name;?>

<?php echo $user->extra ;?>

See the code in the attached file. It works a treat and gets all the data from the subscriber record