how to get user meta in wordpress

1<?php
2	$meta_data = get_user_meta($user_id, $key, $single);
3?>

1function get_usermeta( $user_id, $meta_key = '' ) {
2    _deprecated_function( __FUNCTION__, '3.0.0', 'get_user_meta()' );
3    global $wpdb;
4    $user_id = (int) $user_id;
5 
6    if ( !$user_id )
7        return false;
8 
9    if ( !empty($meta_key) ) {
10        $meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
11        $user = wp_cache_get($user_id, 'users');
12        // Check the cached user object.
13        if ( false !== $user && isset($user->$meta_key) )
14            $metas = array($user->$meta_key);
15        else
16            $metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
17    } else {
18        $metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d", $user_id) );
19    }
20 
21    if ( empty($metas) ) {
22        if ( empty($meta_key) )
23            return array();
24        else
25            return '';
26    }
27 
28    $metas = array_map('maybe_unserialize', $metas);
29 
30    if ( count($metas) == 1 )
31        return $metas[0];
32    else
33        return $metas;
34}
35