Johannes Schmitt has a new post about his "killer feature" he's added to the security for Symfony2 framework (as a bundle) - a new customized expression-based query language that's compiled down to native PHP to make permissions checking simpler and faster.
If you have used the Symfony2 Security Component to any modest degree, you will know that we have a quite heavy voting system which uses attributes like "IS_AUTHENTICATED_FULLY" to make authorization decisions. [...] If you are concerned about performance, then you should not be all too generous with the isGranted() calls. The second option would work as well, but writing a new voter each time you need to make a new check does not really seem ideal either. Fortunately, we can do better.
He includes an example of this expression language in a direct isGranted() call, a string that checks to see if a user has three different roles, and a snippet showing the same thing in the docblock comment of a controller method. The second is a bit more complex, checking for an admin role or if the user is the one that should be deleted. You can find more doucmentation here.