Webdevelopement : Login Specification

I've just started with PHP and I want to implement a login.

Rather than re-inventing the wheel, is there any Online Specification for a login system?

Things I want to implement:

• detect Brute Force a开发者_如何学JAVAttacks
• implement password recovery
• maybe openID and/or with facebook account
• prevent SQL injection

So I think this has been done more than 1000 times. Where can I read about it?

See the PEAR website.

Some packages you may be interested in are Auth and OpenID.