Prevent player using Anvil to rename to something specified

As title.
How to prevent player to rename something to "asd" ?
I need an absolute solution please.

Erm. Anvils are not in PM. I think.

They are but they're not usable

Don't update PocketMine to versions that support Anvil.

I'm sure he's using the fork Geniysis, which does support Anvil. If he does, we can't support you further :/

Da*n PocketMine doesn't support anything right now

Well, you may ask here https://gitter.im/iTXTech/Genisys for help with genisys

.. -.-

CS also supports anvils partly. If you do use genisys, disable then in their config

Seriously they added that into config? Okay, what's next?

Now are we discussing what third-party PocketMine modifications support anvils? Please, the OP was just asking about preventing the player using anvil. He didn't specify which version he is using, so we assume PocketMine. Or if you don't want to assume, just ask him directly. Nobody is reading this thread to see what versions support Anvils.

PM doesn't support using the anvil at all. So this thread is useless if we want to talk bout' PM.
And i won't start to talk bout' other forks here.
Even if I'm developing one, I'll not advertise here for it. See i didn't mention it's name!

The only thing that you can do is cancel the PlayerInteractEvent when player click the Anvil. Doing this, you renounce to the repair of items.

Correct, would've ben my next reply.