Step 1
Create a short code to display the user
function show_loggedin_function( $atts ) {
global $current_user, $user_login;
get_currentuserinfo();
if ($user_login)
return 'Welcome ' . $current_user->display_name . '!';
else
return '';
}
add_shortcode( 'show_loggedin_as', 'show_loggedin_function' );
Step 2
This above code make a shortcode name as [show_loggedin_as]. If we use this shortcode, It will showing us Welcome Wordpress login user name
