How to generate the random default “gravatars” like on Stack Overflow?
The ‘random’ colorful gravatars are displayed because this query string parameter is being added to every gravatar source URL: d=identicon This is done so that if the user doesn’t have a gravatar image associated with his email, this ‘random’ image is displayed, instead of the default blue gravatar image. The following displays the ‘default’ blue … Read more