Web Services is a new paradigm that has evolved with time. With successful demonstration of proof of concept, Web Services are gradually moving towards occupying an important space in enterprise computing. In this book, we will discuss the consumption, development and deployment, description, discovery and security of Web Services in conjunction with the PHP programming model for Web services. This book discusses what Web Services are, how are they important in enterprise computing today and the various standards and programming models to building Web Services using PHP.