To display comments recursively I'm using this:function fetch_article_comments($article_id, $parent_id) {$app = new Connection();    if ($parent_id <= 0) {        $parent_id = NULL;    }    $sql = SELECT * FROM recursive WHERE article_id = :article_id AND comment_parent <=> :parent_id ORDER BY comment_timestamp ASC;    $query = $app->getConnection()->prepare($sql);    $query->execute(array(':article_id' => $article_id,                          ':parent_id' => $parent_id));    return $query->fetchAll();}And to display the comments:function display_comments ($article_id, $parent_id=0, $level=0) {$comments = fetch_article_comments($article_id, $parent_id);  foreach($comments as $comment) {        $comment_id = $comment->comment_id;           $member_id = $comment->member_id;        $comment_text = $comment->comment_text;        $comment_timestamp = $comment->comment_timestamp;  //get timeAgo        // RENDER      ?>          <div class=comment>              <b><?= timeAgoInWords($comment_timestamp); ?></b><br>          <?= $comment_text ?><br>              <a href=# class=replyLink data-comment-id=<?= $comment_id ?>><span class=uk-icon-comment-o> reply</span></a>              <a href=recursive.php?delete=<?= $comment_id ?>><span class=uk-icon-trash-o> delete</span></a>    <form action=recursive.php method=post class=uk-form comment_form id=<?= $comment_id ?>>    <fieldset data-uk-margin>        <input type=hidden name=id value=<?= $article_id ?> />        <input type=hidden name=parent value=<?= $comment_id ?> />        <input type=text placeholder=Comment name=svar>        <button class=uk-button>Comment</button>    </fieldset></form><?php        //Recurse        display_comments($article_id, $comment_id, $level+1);                echo '</div> <!-- /comment -->';    }}?>And the comments is then echoed on the page calling the display_comments().        <div clasS=uk-width-1-1><?= display_comments(2); ?>        </div>(the 2 is the post ID)As you can see there's a lot of HTML inside the function, it's not ideal. How can the code be improved to remove the HTML and maybe foreach the results?
Recursive comment function echoes HTML inside function
php