WordPress: Adding Custom Fields

gistfile1

function fb_add_custom_user_profile_fields( $user ) {
?>
  <h3><?php _e('Extra Profile Information', 'your_textdomain'); ?></h3>
  <table class="form-table">
    <tr>
      <th>
        <label for="address"><?php _e('Address', 'your_textdomain'); ?>
      </label></th>
      <td>
        <input type="text" name="address" id="address" value="<?php echo esc_attr( get_the_author_meta( 'address', $user->ID ) ); ?>" class="regular-text" /><br />
        <span class="description"><?php _e('Please enter your address.', 'your_textdomain'); ?></span>
      </td>
    </tr>
  </table>
<?php }
function fb_save_custom_user_profile_fields( $user_id ) {
  if ( !current_user_can( 'edit_user', $user_id ) )
    return FALSE;
  update_usermeta( $user_id, 'address', $_POST['address'] );
}
add_action( 'show_user_profile', 'fb_add_custom_user_profile_fields' );
add_action( 'edit_user_profile', 'fb_add_custom_user_profile_fields' );
add_action( 'personal_options_update', 'fb_save_custom_user_profile_fields' );
add_action( 'edit_user_profile_update', 'fb_save_custom_user_profile_fields' );