Using SOAP with PHP
http://developer.apple.com/internet/webservices/soapphp.html

Apple Inc.
2006

Abstract:

SOAP, the Simple Object Access Protocol, is the powerhouse of web services. It's a highly adaptable, object-oriented protocol that exists in over 80 implementations on every popular platform, including AppleScript, JavaScript, and Cocoa. It provides a flexible communication layer between applications, regardless of platform and location. As long as they both speak SOAP, a PHP-based web application can ask a C++ database application on another continent to look up the price of a book and have the answer right away.