Since WordPress has acquired Gravatar, in the new version of WordPress 2.5, Gravatar can be directly called by a function.
Let me briefly introduce Gravatar. It provides an avatar display service for blog comments. You just need to register an account on Gravatar and upload one of your avatars to associate it with your email address.
When you comment on any WordPress blog that supports Gravatar, Gravatar will display the avatar associated with your email address that you uploaded.
Now, using Gravatar only requires adding a few lines of code to your blog. In the template file `comment.php`, find this line: `comment_text` refers to the comment content, and what we want to do is add the commenter's avatar before the comment content.