Create Popular Post WordPress Without Plugin

[thebestsolver.com]How to  Create Popular Post WordPress Without Plugin ? very simple, just copy paste code below in sidebar.php your themes or wherever place that you like !

<ul>
<?php
$popular_posts = $wpdb->get_results("SELECT id,post_title FROM {$wpdb->prefix}posts ORDER BY comment_count DESC LIMIT 0,7");
foreach($popular_posts as $post) {
print "<li><a href=. get_permalink($post->id) .>".$post->post_title."</a></li>
";
}
?>
</ul>