Quercus is Caucho Technology's fast, open-source, 100% Java implementation of the PHP language. Performance is 4x mod_php and is comparable with PHP accelerator performance. Quercus uses Resin-IoC/WebBeans to integrate with Resin services. Quercus is Caucho Technology's fast, open-source, 100% Java implementation of the PHP language. Quercus is a feature of Caucho Technology's Resin Application Se