using my-hacks

The error will probably be whitespace after the last ?>

That said, we’ve moved on since the days of my-hacks, what does the code do ? It’s probably a plugin.

Well it’s supposed to “display the last unique commentors for a post and provide a link to their site if they provided a URL when commenting”

If there’s a better way to do this please post.

you could try searching for a “recent comments” plugin

Comment Plugger ??

‘Gives a list of that last people to comment on a post, with a link to their site if they provided one.’

https://mtdewvirus.com/code/wordpress-plugins/