code to html problem

Hello guys,

I’m trying to convert this bit of code to inactive php / html :

<h2>Popular Posts</h2>
<ul>
<?php $result = $wpdb->get_results("SELECT comment_count,ID,post_title FROM $wpdb->posts ORDER BY comment_count DESC LIMIT 0 , 5");
foreach ($result as $post) {
setup_postdata($post);
$postid = $post->ID;
$title = $post->post_title;
$commentcount = $post->comment_count;
if ($commentcount != 0) { ?>

<li><a href="<?php echo get_permalink($postid); ?>" title="<?php echo $title ?>">
<?php echo $title ?></a> {<?php echo $commentcount ?>}</li>
<?php } } ?>

</ul>

I’m trying to write it with the html special entities, in the post html editor but doesn’t seems to work : 404 not found when I publish…

I’m using this online tool : https://www.palfrader.org/code2html/code2html.html

Any ideas are appreciated