Change the default avatar in WordPress
If you’ve ever wanted to change the default avatar in WordPress, all you need is a quick filter in functions.php that inserts and names your new avatar. Once you add the markup below, you’ll see your new avatar type listed in wp-admin > Settings > Discussion along with the choices like Identicons and MonsterID. The code:
This is a pretty simple one. Our function newavatar() is hooked to the avatar_defaults, and we simply add our new avatar choice, which includes a path to the image URL along with a title (pigs!). At the end, we return the defaults, which has been impregnated with our new custom avatar, and no one is ever the wiser!
DATE2nd February, 2012