these last days I was trying  to get a recipe to create Openid Enabled  websites using  Zend Framework Components ”Zend_Openid ”

1-what is Open ID ?

OpenID is an open, decentralized standard for authenticating users which can be used for access control, allowing users to log on to different services with the same digital identity where these services trust the authentication body. OpenID replaces the common log on process that uses a login-name and a password, by allowing a user to log in once and gain access to the resources of multiple software systems.[1] The term OpenID can also refer to an ID used in the standard.

more simple explanation is that any body can login to an OpenID-enabled site with out creating new account / new password
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