if ( !function_exists( 'get_toc_tag' ) ):
function get_toc_tag($expanded_content, &$harray, $is_widget = false, $depth_option = 0){
  global $post;
  $mode = true;

  //フォーラムページだと表示しない
  if (is_plugin_fourm_page()) {
    return;
  }

  $content     = $expanded_content;
  if ($mode) {
    $content = $post->post_content; 
    $pages = explode('<!--nextpage-->', $content); 
  }
  $headers     = array();
  $html        = '';
  $toc_list    = '';
  $id          = '';
  $toggle      = '';
  $counter     = 0;
  $counters    = array(0,0,0,0,0,0);
  $harray      = array();

  $class       = 'toc';
  $title       = get_toc_title(); //目次タイトル
  $showcount   = 0;
  $depth       = intval(get_toc_depth()); //2-6 0で全て
  $top_level   = 2; //h2がトップレベル
  $targetclass = 'entry-content'; //目次対象となるHTML要素

  if ($title === '') {
    $title = __('目次', THEME_NAME);
  }

  $set_depth = intval(get_toc_depth()); //2-6 0で全て
  if (intval($set_depth) == 0) {
    $set_depth = 6;
  }

  $number_visible   = is_toc_number_visible(); //見出しの数字を表示するか
  if ($number_visible) {
    $list_tag = 'ol';
  } else {
    $list_tag = 'ul';
  }


  if($targetclass===''){$targetclass = get_post_type();}
  for($h = $top_level; $h <= 6; $h++){$harray[] = 'h' . $h . '';}

  if ($mode) { 
    // 分割ページごとに見出しを取得
    $page_num = 1;
    foreach ($pages as $page_content) {
      if (preg_match_all('/<([hH][2-6]).*?>(.*?)<\/[hH][2-6]>/is', $page_content, $matches, PREG_SET_ORDER)) {
        foreach ($matches as $m) {
          $counter++;
          $headers[] = array(
            'tag'  => strtolower($m[1]),
            'text' => trim(strip_tags($m[2])),
            'raw'  => $m[2],
            'id'   => 'toc'.$counter,
            'page' => $page_num,
          );
        }
      }
      $page_num++;
    }
    $header_count = count($headers);
  }else {
    preg_match_all('/<([hH][1-6]).*?>(.*?)<\/[hH][1-6].*?>/us', $content, $headers);
    $header_count = count($headers[0]);
  }

  if($top_level < 1){$top_level = 1;}
  if($top_level > 6){$top_level = 6;}

  $current_depth          = $top_level - 1;
  $prev_depth             = $top_level - 1;
  $max_depth              = (($depth == 0) ? 6 : intval($depth)) - $top_level + 1;


  if($header_count > 0){
    $toc_list .= '<' . $list_tag . (($current_depth == $top_level - 1) ? ' class="toc-list open"' : '') . '>';
  }
  for($i=0;$i < $header_count;$i++){
    $depth = 0;
    $h_actual = $mode ? $headers[$i]['tag'] : strtolower($headers[1][$i]);

    switch($h_actual) {
      case 'h1': $depth = 1 - $top_level + 1; break;
      case 'h2': $depth = 2 - $top_level + 1; break;
      case 'h3': $depth = 3 - $top_level + 1; break;
      case 'h4': $depth = 4 - $top_level + 1; break;
      case 'h5': $depth = 5 - $top_level + 1; break;
      case 'h6': $depth = 6 - $top_level + 1; break;
    }
    if($depth >= 1 && $depth <= $max_depth){
      if($current_depth == $depth && $i != 0){
        $toc_list .= '</li>';
        $counters[$current_depth - 1] ++;
      }
      while($current_depth > $depth){
        $toc_list .= '</li></'.$list_tag.'>';

        $current_depth--;

        $counters[$current_depth] = 0;
        $counters[$current_depth - 1] ++;
      }
      if($current_depth != $prev_depth){
        $toc_list .= '</li>';
        $counters[$current_depth - 1] ++;
      }
      while($current_depth < $depth){
        $toc_list .= '<'.$list_tag.'>';

        $current_depth++;
        $counters[$current_depth - 1] ++;
      }
      $hide_class = null;
      if ( $depth_option != 0 && $depth >= $depth_option ) {
        $hide_class = ' class="display-none"';
      }
      $counter++;
      $text = $mode ? strip_tags($headers[$i]['text']) : strip_tags($headers[2][$i]);
      if (is_toc_heading_inner_html_tag_enable()) {
        $text = $mode ? $headers[$i]['raw'] : $headers[2][$i];
        $text = preg_replace('{<a.*?>(.*?)</a>}', "$1", $text);
      }
      if ($mode) {
        $link = get_permalink($post); 
        if ($headers[$i]['page'] > 1) $link = trailingslashit($link).$headers[$i]['page'].'/'; 

        $toc_list .= '<li'.$hide_class.'><a href="'.$link.'#'.$headers[$i]['id'].'" tabindex="0">' . $text . '</a>'; 
      }else {
        $toc_list .= '<li'.$hide_class.'><a href="#toc' . $counter . '" tabindex="0">' . $text . '</a>';
      }
      $prev_depth = $depth;
    }
  }
  while($current_depth >= 1 ){
    $toc_list .= '</li></'.$list_tag.'>';
    $current_depth--;
  }

  ///////////////////////////////////////////
  // 目次タグの生成
  ///////////////////////////////////////////
  if($id!==''){$id = ' id="' . $id . '"';}else{$id = '';}
  if (is_toc_toggle_switch_enable()) {
    $checked = null;
    $is_visible = apply_filters('is_toc_content_visible', is_toc_content_visible());
    if ($is_visible) {
      $checked = ' checked';
    }
    $title_elm = 'label';
    // if ($is_widget) {
    //   $toc_check = null;
    //   $label_for = null;
    // } else {
    //   global $_TOC_INDEX;
    //   $toc_id = 'toc-checkbox-'.$_TOC_INDEX;
    //   $toc_check = '<input type="checkbox" class="toc-checkbox" id="'.$toc_id.'"'.$checked.'>';
    //   $label_for = ' for="'.$toc_id.'"';
    //   $_TOC_INDEX++;
    // }
    global $_TOC_INDEX;
    $toc_id = 'toc-checkbox-'.$_TOC_INDEX;
    $toc_check = '<input type="checkbox" class="toc-checkbox" id="'.$toc_id.'"'.$checked.'>';
    $label_for = ' for="'.$toc_id.'"';
    $_TOC_INDEX++;
  } else {
    $title_elm = 'div';
    $toc_check = null;
    $label_for = null;
  }
  $html .= '
  <div' . $id . ' class="' . $class . get_additional_toc_classes() . ' border-element">'.$toc_check.
    '<'.$title_elm.' class="toc-title"'.$label_for.'>' . $title . '</'.$title_elm.'>
    <div class="toc-content">
    ' . $toc_list .'
    </div>
  </div>';

  global $_TOC_AVAILABLE_H_COUNT;
  $_TOC_AVAILABLE_H_COUNT = $counter;
  if (!is_toc_display_count_available($counter)){
    return ;
  }

  return apply_filters('get_toc_tag',$html, $harray, $is_widget );
}
endif;