PHP - 使用父级创建评论列表

Question

I have table structure like this:

id_comment
body
date_created
date_updated    
user_id
parent_id

and for now this function:

public function comments_list($comments)
    {
        $comments_list = "";
        foreach ($comments as $c) :
            if($c['parent_id'] == 0) :
                $comments_list .= '<div class="comment level-0">';
                $comments_list .= $c['body'];
                $comments_list .= '</div>';
            endif;
        endforeach;


    }

$comments is the array with all the comments (2d array). $c['parent_id'] == 0 is parent comment. Child comment have parent_id set to id of the parent comment. How can I create comment list with parent/child relationship?

Comments structure:

array(5) {
  [0]=>
  array(9) {
    ["id_comment"]=>
    string(1) "1"
    ["body"]=>
    string(532) "Odio lectus hac odio ultrices vel diam hac elementum amet et scelerisque porttitor nunc elementum. Sit nunc turpis! Porttitor, odio massa nisi turpis porttitor aliquam aliquam proin! Tincidunt dapibus adipiscing sagittis adipiscing odio velit eros nisi tortor porttitor ut elit enim amet egestas porta. Massa. Nec tortor aliquet sed ultrices dignissim massa! Adipiscing tortor, pulvinar ultricies, lectus adipiscing sagittis, a tortor sit magna integer. Scelerisque hac amet amet habitasse et turpis integer nisi sagittis ridiculus."
    ["date_created"]=>
    string(19) "2014-07-01 00:00:00"
    ["date_updated"]=>
    string(19) "2014-07-02 02:34:51"
    ["post_id"]=>
    string(1) "4"
    ["user_id"]=>
    string(1) "1"
    ["parent_id"]=>
    string(1) "0"
    ["good_vote"]=>
    string(1) "0"
    ["bad_vote"]=>
    string(1) "0"
  }
  [1]=>
  array(9) {
    ["id_comment"]=>
    string(1) "2"
    ["body"]=>
    string(532) "Odio lectus hac odio ultrices vel diam hac elementum amet et scelerisque porttitor nunc elementum. Sit nunc turpis! Porttitor, odio massa nisi turpis porttitor aliquam aliquam proin! Tincidunt dapibus adipiscing sagittis adipiscing odio velit eros nisi tortor porttitor ut elit enim amet egestas porta. Massa. Nec tortor aliquet sed ultrices dignissim massa! Adipiscing tortor, pulvinar ultricies, lectus adipiscing sagittis, a tortor sit magna integer. Scelerisque hac amet amet habitasse et turpis integer nisi sagittis ridiculus."
    ["date_created"]=>
    string(19) "0000-00-00 00:00:00"
    ["date_updated"]=>
    string(19) "2014-07-02 02:34:54"
    ["post_id"]=>
    string(1) "4"
    ["user_id"]=>
    string(1) "1"
    ["parent_id"]=>
    string(1) "2"
    ["good_vote"]=>
    string(1) "0"
    ["bad_vote"]=>
    string(1) "0"
  }
  [2]=>
  array(9) {
    ["id_comment"]=>
    string(1) "3"
    ["body"]=>
    string(532) "Odio lectus hac odio ultrices vel diam hac elementum amet et scelerisque porttitor nunc elementum. Sit nunc turpis! Porttitor, odio massa nisi turpis porttitor aliquam aliquam proin! Tincidunt dapibus adipiscing sagittis adipiscing odio velit eros nisi tortor porttitor ut elit enim amet egestas porta. Massa. Nec tortor aliquet sed ultrices dignissim massa! Adipiscing tortor, pulvinar ultricies, lectus adipiscing sagittis, a tortor sit magna integer. Scelerisque hac amet amet habitasse et turpis integer nisi sagittis ridiculus."
    ["date_created"]=>
    string(19) "0000-00-00 00:00:00"
    ["date_updated"]=>
    string(19) "2014-07-02 02:34:56"
    ["post_id"]=>
    string(1) "4"
    ["user_id"]=>
    string(1) "1"
    ["parent_id"]=>
    string(1) "3"
    ["good_vote"]=>
    string(1) "0"
    ["bad_vote"]=>
    string(1) "0"
  }
  [3]=>
  array(9) {
    ["id_comment"]=>
    string(1) "4"
    ["body"]=>
    string(532) "Odio lectus hac odio ultrices vel diam hac elementum amet et scelerisque porttitor nunc elementum. Sit nunc turpis! Porttitor, odio massa nisi turpis porttitor aliquam aliquam proin! Tincidunt dapibus adipiscing sagittis adipiscing odio velit eros nisi tortor porttitor ut elit enim amet egestas porta. Massa. Nec tortor aliquet sed ultrices dignissim massa! Adipiscing tortor, pulvinar ultricies, lectus adipiscing sagittis, a tortor sit magna integer. Scelerisque hac amet amet habitasse et turpis integer nisi sagittis ridiculus."
    ["date_created"]=>
    string(19) "0000-00-00 00:00:00"
    ["date_updated"]=>
    string(19) "2014-07-02 02:34:59"
    ["post_id"]=>
    string(1) "4"
    ["user_id"]=>
    string(1) "0"
    ["parent_id"]=>
    string(1) "1"
    ["good_vote"]=>
    string(1) "1"
    ["bad_vote"]=>
    string(1) "0"
  }
  [4]=>
  array(9) {
    ["id_comment"]=>
    string(1) "5"
    ["body"]=>
    string(532) "Odio lectus hac odio ultrices vel diam hac elementum amet et scelerisque porttitor nunc elementum. Sit nunc turpis! Porttitor, odio massa nisi turpis porttitor aliquam aliquam proin! Tincidunt dapibus adipiscing sagittis adipiscing odio velit eros nisi tortor porttitor ut elit enim amet egestas porta. Massa. Nec tortor aliquet sed ultrices dignissim massa! Adipiscing tortor, pulvinar ultricies, lectus adipiscing sagittis, a tortor sit magna integer. Scelerisque hac amet amet habitasse et turpis integer nisi sagittis ridiculus."
    ["date_created"]=>
    string(19) "0000-00-00 00:00:00"
    ["date_updated"]=>
    string(19) "2014-07-02 02:35:02"
    ["post_id"]=>
    string(1) "4"
    ["user_id"]=>
    string(1) "1"
    ["parent_id"]=>
    string(1) "0"
    ["good_vote"]=>
    string(1) "0"
    ["bad_vote"]=>
    string(1) "0"
  }
}