viewComments.php

<?php

// get the info from the db
$sql = "SELECT cm.id, users.nickname, cm.comment, cm.article_id, cm.created_at FROM comments as cm 
        INNER JOIN users ON cm.user_id = users.id 
        WHERE cm.article_id =" . htmlspecialchars($_GET["articleId"]).
" ORDER BY cm.created_at";
$result = $conn->query($sql);

// total number of comments
$total_comments =  $result->num_rows;
$comment_str = ($total_comments === 0) ? 'No comments yet' : $total_comments . " " . pluralize($total_comments, 'comment');

// display how many comments under this article
echo "<p class='text-center'><strong>$comment_str</strong><hr></p>";

if(is_logged())
{
    // while there are rows to be fetched...
    while ($list = $result->fetch_assoc())
    {
        // echo data
        echo "<div class='box col-lg-12'>
            <p><small><strong>". $list["nickname"] ."</strong>&nbsp;&nbsp;&nbsp;". $list["created_at"]."</small><br>" .$list["comment"] ."</p>
          </div>";
    } // end while
}

?>