Add numerious for each wordpress widget in sidebar | HTML and CMS is a Drupal-specific web and mobile development team

<?php
/**
 * Add numerious for each widget in sidebar
 */
function htmlandcms_widget_classes($params) {
  static $classes;
  if (!isset($classes[$params[0]['id']])) {
    $classes[$params[0]['id']] = 1;
  } else {
    $classes[$params[0]['id']] += 1;
  }
  $params[0]['before_widget'] = "<div id='{$params[0]['id']}-{$classes[$params[0]['id']]}'>" . $params[0]['before_widget'];
  $params[0]['after_widget'] = $params[0]['after_widget'] . "</div>";
  return $params;
}
add_filter('dynamic_sidebar_params', 'htmlandcms_widget_classes');