The Zend_Soap_Client class simplifies SOAP client
development for PHP programmers.
It may be used in WSDL or non-WSDL mode.
Under the WSDL mode, the Zend_Soap_Client component uses a WSDL
document to define transport layer options.
The WSDL description is usually provided by the web service the client will access. If the
WSDL description is not made available, you may want to use
Zend_Soap_Client in non-WSDL mode. Under this mode, all
SOAP protocol options have to be set explicitly on the
Zend_Soap_Client class.