gravatar

<!-- Easy Gravatar implementation for
     Wordpress comment page: -->
<?php
$gravlink = "http://www.gravatar.com/avatar/";
$gravlink .= md5(strtolower(trim(get_comment_author_email())));
$gravlink .= "?d=".urlencode("https://halcanary.org/images/q80.png");
echo $gravlink; ?>