Sebastian Bergmann is actively involved in the development of PHP and has created a wide range of tried-and-trusted development tools. As an internationally sougt-after expert, he shares his knowledge and experience through widely read books and articles. His presentations at conferences around the world are intently followed by the PHP community and others.The computer scientist (Diplom-Informatiker) is a co-founder of thePHP.cc and a pioneer in the field of quality assurance in PHP projects. His testing framework, PHPUnit, is a de facto standard.