What's are good Twitter PHP libs to send a message to new followers?

I am looking for a goo开发者_Go百科d PHP based lib to send a message to new followers. Probably it's already done. I think it must work as a twitter client and not around OAUTH2 authentication.

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Here is Twitter's list of PHP API's

http://dev.twitter.com/pages/libraries#php

You will have to use OAUTH2, otherwise you will not be able to send a message to followers.