I need to display on some specific pages some selected user meta data (not all), for some users.

On the Wordpress Codex page for the get_user_meta() function we have this example (user_id = 9):

<?php $all_meta_for_user = get_user_meta( 9 ); print_r( $all_meta_for_user ); ?> 

The results of this example:

Array ( [first_name] => Array ( [0] => Tom ) [last_name] => Array ( [0] => Auger) [nickname] => Array ( [0] => tomauger ) [description] => etc.... ) 

And a Note (shortened):

... you may want to run a simple array_map() on the results of get_user_meta() in order to take only the first index of each result (this emulating what the $single argument does when $key is provided:

if( $all_meta_for_user = get_user_meta( $user_id ) ) $all_meta_for_user = array_map( function( $a ){ return $a[0]; }, get_user_meta( $user_id ) ); print_r( $all_meta_for_user ); 

The result:

Array ( [first_name] => Tom [last_name] => Auger [nickname] => tomauger [description] => etc.... ) 

My question is:

How to put this in a function that will display a HTML formatted, for example the user last and first names with a shortcode?

What I mean? On a specific page we put a shortcode with the user ID and the related function must return a HTML code for each selected key of this user. Is this possible? Can anyone help me?

I need to display on some specific pages some selected user meta data (not all), for some users.

On the Wordpress Codex page for the get_user_meta() function we have this example (user_id = 9):

<?php $all_meta_for_user = get_user_meta( 9 ); print_r( $all_meta_for_user ); ?> 

The results of this example:

Array ( [first_name] => Array ( [0] => Tom ) [last_name] => Array ( [0] => Auger) [nickname] => Array ( [0] => tomauger ) [description] => etc.... ) 

And a Note (shortened):

... you may want to run a simple array_map() on the results of get_user_meta() in order to take only the first index of each result (this emulating what the $single argument does when $key is provided:

if( $all_meta_for_user = get_user_meta( $user_id ) ) $all_meta_for_user = array_map( function( $a ){ return $a[0]; }, get_user_meta( $user_id ) ); print_r( $all_meta_for_user ); 

The result:

Array ( [first_name] => Tom [last_name] => Auger [nickname] => tomauger [description] => etc.... ) 

My question is:

How to put this in a function that will display, for example, the user last and first names with a shortcode (but really I need more user meta data)?

What I mean? On a specific page we put a shortcode with the user ID and the related function must return the meta data for each selected key of this user. Is this possible? Can anyone help me?