Get all User data in WordPress

get_user_data.php

<?php
/**
 * Get an array of all user data
 * @param  string|int $user_id
 * @return array               merged array of user meta and data
 */
function get_user_data( $user_id ){
	$user_data = (array) get_userdata( $user_id )->data;
	$user_meta = array_map( function( $item ){ return $item[0]; }, (array) get_user_meta( $user_id ) );
	return array_merge( $user_data, $user_meta );
}