Conditions For GoogleRobots

[FatalBreeze]

Hello, I'd like to have a sentence in my site that all visitors can see, but google robots cannot see, because they index it and as a result it is shown on google search when people search my site.

What kind of IF statement can i do?

[no mods]

I think , I could be wrong, if you code your words, the bot doesnt see them.

[FatalBreeze]

how do you check what a user's "USER AGENT" is in vbulletin?
since the regular "$HTTP_USER_AGENT" doesn't work....

[Dismounted]

$_server['http_user_agent']