/**  * 按ID條件從評論數組中遞歸查找  *  */ function getCommentsFromAryById($commtAry, $id) {  if ( !is_array($commtAry) ) return FALSE;  foreach($commtAry as $key=>$value) {   if ( $value['id'] == $id ) return $value;   if ( isset($value['children']) && is_array($children) ) $this->getCommentsFormAryById($value['children'], $id);  } } /**  * 追加 子評論 到 主評論 中，并形成children子項  *  * @param array $commtAry 原評論數據引用  * @param int $parentId 主評論ID  * @param array $childrenAry 子評論的值  */ function addChildenToCommentsAry($commtAry, $parentId, $childrenAry) {  if ( !is_array($commtAry) ) return FALSE;   foreach($commtAry as $key=>$value) {   if ( $value['id'] == $parentId ) {    $commtAry[$key]['children'][] = $childrenAry;    return TRUE;   }   if ( isset($value['children']) ) $this->addChildenToCommentsAry($commtAry[$key]['children'], $parentId, $childrenAry);  } }  $result = $this->BBDM->select($table, $column, $condition, 0, 1000);   /* 開始進行嵌套評論結構重組 */  array_shift($result);  $count = count($result);  $i  = 0;  while( $i<$count ) {   if ( '0' != $result[$i]['parentId'] ) {    $this->addChildenToCommentsAry($result, $result[$i]['parentId'], $result[$i]);    unset($result[$i]);   }   $i++;  }  $result = array_values($result);  /* 重組結束 */ 

<?php$comments = array (  array (    'id' => '3',    'parent' => '0'  ),  array (    'id' => '9',    'parent' => '0'  ),  array (    'id' => '1',    'parent' => '3'  ),  array (    'id' => '2',    'parent' => '3'  ),  array (    'id' => '5',    'parent' => '1'  ),  array (    'id' => '7',    'parent' => '1'  ));function html5_comment($comment) {  echo '<li>';  echo 'id:', $comment['id'], ' parent:', $comment['parent'];}function start_el(& $output, $comment) {  ob_start();  html5_comment($comment);  $output .= ob_get_clean();}function end_el(& $output) {  $output .= "</li><!-- #comment-## -->/n";}function start_lvl(& $output) {  $output .= '<ol class="children">' . "/n";}function end_lvl(& $output) {  $output .= "</ol><!-- .children -->/n";}function display_element($e, & $children_elements, $max_depth, $depth, & $output) {  $id = $e['id'];  start_el($output, $e); //當前評論的開始代碼  if ($max_depth > $depth +1 && isset ($children_elements[$id])) { //如果沒超過最大層，并且存在子元素數組    foreach ($children_elements[$id] as $child) {      if (!isset ($newlevel)) { //第一次循環沒設置變量$newlevel，所以把$newlevel設為true，并且開始子元素的開始代碼;第二次及之后的循環，已經設置了$newlevel,就不會再添加子元素的開始代碼。因為同一批循環時兄弟元素，所以只需要一個子元素開始代碼，循環內容為并列關系。        $newlevel = true;        start_lvl($output);      }      display_element_template($child, $children_elements, $max_depth, $depth +1, $output); //$child作為參數，繼續去尋找下級元素    }    unset ($children_elements[$id]); //用完釋放變量，以后就不會重復判斷該值了,遞歸后繼續判斷剩下的子元素  }  if (isset ($newlevel) && $newlevel) { //如果前面找到了子元素，這里就要執行子元素的結束代碼    end_lvl($output);  }  end_el($output); //當前評論的結束代碼}function display_element_template($e, & $children_elements, $max_depth, $depth, & $output) {  $id = $e['id'];  display_element($e, $children_elements, $max_depth, $depth, $output);  if ($max_depth <= $depth +1 && isset ($children_elements[$id])) { //如果超出最大層級，并且子元素存在的話，以$child為參數繼續往下找    foreach ($children_elements[$id] as $child) {      display_element_template($child, $children_elements, $max_depth, $depth, $output);    }    unset ($children_elements[$id]); //用完釋放變量  }}function comments_list($comments) {  $top_level_elements = array ();  $children_elements = array ();  foreach ($comments as $e) {    if (0 == $e['parent']) {      $top_level_elements[] = $e;    } else {      $children_elements[$e['parent']][] = $e;    }  }  $output = '';  foreach ($top_level_elements as $e) {    display_element_template($e, $children_elements, 2, 0, $output);  }  //var_dump($children_elements);//由于每次用完$children_elements后都會釋放變量，所以到最后$children_elements為空數組  return $output;}echo '<ol class="comment-list">', comments_list($comments), '</ol>';