I am familiar with both Zend and Symfony framework for PHP. But I could not say which is better. They are good in their own ways. In Symfony, propel as ORM and it builds. But in Zend instead of propel, uses the classes provided by the framework. A good thing for Symfony developer is that there are many tutorials available for Symfony in web and also the forums are very active. It is very easy to get solution for a question in Symfony from web. Zend has a very good reference document in their website, but support from outside is very low.
Introduction Single Sign-On is a process that allows network users to access all authorized network resources without having to separately log in to each resource. Single Sign-On also gives your organization the ability to integrate with an external identity management system or perform web based single sign on to Force.com. How Single Sign-On Works The high-level process for authenticating users via Single Sign-On is as follows: 1. When a user tries to log in—either online or using the API—Salesforce validates the username and checks the user’s profile settings. 2. If the user’s profile has the "Uses Single Sign-on" user permission, then Salesforce does not authenticate the username with the password. Instead, a Web Services call is made to the user’s single sign-on service, asking it to validate the username and password. 3. The Web Services call passes the username, password, and sourceIp to a Web Service defined for your organization. (sourceIp is the IP address that ori...