The idea and show visitors to the site if the author of the post is online or offline, is there any plugin or some PHP code that does this verification?
In Xenforo you have this functionality, I would like to apply it to my blog.
Examples:
I searched in several places, including here in the Portuguese stack and in the English stack, but I could not find a way to do that.
I know the purpose of the forum and answer direct questions, but I had no choice but to ask here.