The Web Service SDK is a zip archive containing the two subfolders Documentation and Samples.
The Documentation folder contains this document, as well as the WSDL file (butterfly.wsdl) describing the SOAP operations, and the cacert.pem certificates file required for the SSL connection.
The Samples folder contains the Java and PHP samples. The Java sample is provided both as source and as a precompiled jar file. The PHP sample, since PHP is an interpreted language, contains only the source files.
The SDK does not include the Switch installer or the software required to build and run the samples. Switch installers can be downloaded from the Enfocus website. A trial key is included with the Switch installer.
The JRE and JDK required for the Java sample can be downloaded from http://www.oracle.com/technetwork/java/javase/downloads/index.html.
Most web servers have a PHP module available; check the documentation of your web server on how to get and install this module.