Selenium 2 webdriver "thin client" for php 5.3+; this fork is up-to-date WRT JsonWireProtocol (last revised 2013-01-04); the "upstream" branch tracks the original upstream repo; the "master" branch uses PSR-0 naming convention for php 5.3+ namespaces; the "5.2.x" branch uses the PEAR/ZF1 naming convention (and will no longer be maintained)