Can I let users write custom scripts (using PHP?) for a web-based game?

[sofakng]

Many of you probably remember MUD's so you might remember LPMud and LPC. LPC was a C-style scripting language that was used to create in-game scripts that controlled items, etc.

Well, I'd like to creats something like this on the web.

For example, somebody might want to create a custom sword that everytime it attacks it says "Hey, I'm attacking you!".

Ideally I'd like to let the users use PHP to create this, but I'm not sure how safe this is and I'm also not sure how I'd go about implementing this type of system.

I'm open to other ideas for letting users write custom scripts so please let me know if you have any suggestions for me.

Thanks,
John

[altexis]

Yes you can, but it would put your server in great risk!