New answers tagged ubuntu-one
login.ubuntu.com is an OpenID provider. It is a Free Software project released under the terms of the GNU Affero GPL v3. You can find it on Launchpad in the canonical-identity-provider project.
It would use PHP probably and then save your data into a SQL database. Pretty much you enter the data into the HTML form which is then sent to the server. The server analyses the data to see if it's legitimate and then performs an action based upon it. If you are logging in, the server will likely sent session data and cookies to and from the server-client ...
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