With PHP5.3.3 recently released I really feel it is time that php developers are taking namespaces seriously. If you don’t I guarantee you will be out of a job within five years. Namespaces are a fundamental part of the future of PHP. The talk explains the usage on importing third party libraries, using it in your own code and aliasing. The full works.
Clipping is a handy way to collect important slides you want to go back to later.