creat new custom extra user profiel fields

my_userfields,php

function my_userfields(){
 $output = '<h3>Meine Felder</h3>';
 $output .= '<table class="form-table">';

 if(isset($_GET['user_id'])){
 	$user_id = $_GET['user_id'];
 }else{
 	$user_id = $_POST['user_id'];
 }

 $my_userfields_value = get_user_meta($user_id, 'my_userfields');
	
 $my_userfields = array(
 				array(
 					'label' => 'Ein tolles Feld',
					'value' => $my_userfields_value[0]['feld_name'],
					'slug' 	=> 'feld_name',
 				),
				array(
 					'label' => 'Zahl',
					'value' => $my_userfields_value[0]['zahl'],
					'slug' 	=> 'zahl',
 				)
 			  );

 foreach($my_userfields as $my_userfield){
 	$output .= '<tr>';
 	$output .= '<th><label for="'.$my_userfield['slug'].'">'.$my_userfield['label'].'</label></th>';
 	$output .= '<td><input type="text" name="my_userfields['.$my_userfield['slug'].']" id="'.$my_userfield['slug'].'" value="'.$my_userfield['value'].'" class="regular-text code" /></td>';
 	$output .= '</tr>';
 }
 
 $output .= '</table>';

 echo $output; 
}


function save_my_userfields( $user_id ){
	global $wpdb;
	
	#print_r($_POST);
	update_usermeta( $user_id, 'my_userfields', $_POST['my_userfields'] );
	
}

add_action( 'show_user_profile', 'my_userfields' );
add_action( 'edit_user_profile', 'my_userfields' );
add_action( 'edit_user_profile_update', 'save_my_userfields' );

rr_userfields.php

<?php
/**
 * Plugin Name: ADD Custom User Fields
 * Description: Dieses Plugin f&uuml;gt dem Benutzerprofil neue Benutzerfelder hinzu.
 * Version: 1
 * Author: Ren&eacute; Reimann
 * Author URI: mailto:rene@die-pixler.de
 *
 * @Toscho Thanks for the safety tip!
 * https://gist.github.com/toscho
 *
 */


add_action( 'show_user_profile', 'RR_custom_userfields' );
add_action( 'edit_user_profile', 'RR_custom_userfields' );
add_action( 'edit_user_profile_update', 'save_RR_custom_userfields' );
 
 
function RR_custom_userfields( $user ){
 $user_id = $user->ID;
 
 $RR_custom_userfields_value = get_user_meta($user_id, 'RR_custom_userfields');
 $RR_custom_userfields = array(
 				array(
 					'label' => 'Ein tolles Feld',
					'value' => $RR_custom_userfields_value[0]['feld_name'],
					'slug' 	=> 'feld_name',
 				),
				array(
 					'label' => 'Zahl',
					'value' => $RR_custom_userfields_value[0]['zahl'],
					'slug' 	=> 'zahl',
 				)
 			  );

 $output = '<h3>Meine Felder</h3>';
 $output .= '<table class="form-table">';

 foreach($RR_custom_userfields as $RR_custom_userfield){
 	$output .= '<tr>';
 	$output .= '<th><label for="'.$RR_custom_userfield['slug'].'">'.$RR_custom_userfield['label'].'</label></th>';
 	$output .= '<td><input type="text" name="RR_custom_userfields['.$RR_custom_userfield['slug'].']" id="'.$RR_custom_userfield['slug'].'" value="'.$RR_custom_userfield['value'].'" class="regular-text code" /></td>';
 	$output .= '</tr>';
 }
 
 $output .= '</table>';

 echo $output; 
}


function save_RR_custom_userfields( $user_id ){
	global $wpdb;

	if (  current_user_can( 'edit_user', $user_id ) ){
		foreach($_POST['RR_custom_userfields'] as $RR_custom_field_key => $RR_custom_field_data){	
			$data[$RR_custom_field_key] = htmlspecialchars ( strip_tags ( $RR_custom_field_data ), ENT_QUOTES, 'utf-8', FALSE );
		}

		update_usermeta( $user_id, 'RR_custom_userfields', $data );
	}
	
}


?>