Extend from SoapClient Examples
Just a collection gist of some assorted example SOAPClients. Code must not be stable or useful under all circumstances, these are examples. Most of the code is outdated, so you won't need to use it any longer in production code. I've just collected and compiled this together out of interest, the information normally is scattered around.
If you need to a start with PHP's SOAPClient start with the PHP manual page of it and read through the comments as well. Double check with exisiting bug-reports if given as many things are fixed since a comment was left.