PHP 5.4 is about to bring some of the most exciting changes to the PHP language to date. Learn about traits, array dereferencing, indirect method calls using array callback syntax and improvements to closures and streams. Additionally, the talk reminds the new bits in PHP 5.3, in case you missed them: Namespaces, closures and PHAR.
Video Producer: PHP UK Conference
did you lived under a rock or something ?
this information is really OLD
PHP 5.4 was released March 1st 2012.