Extending classes multiple times

I had been under the impression that one could extend a class only once. That is, if I extend class A with class B I would then not be able to extend B again with any other class. See: http://www.php.net/manual/en/keyword.extends.php "An extended class is always dependent on a single base class, that is, multiple inheritance is not supported. Classes are extended using the keyword 'extends'." With some testing however, it appears that I can extend class B with class C and class C with class D and so on... Am I misinterpreting the manual? I suspect I am. Or is this a new feature. Thoughts? Thanks, Matt Friedman Web Applications Developer www.SpryNewMedia.com Email: matt@SpryNewMedia.com