You need to create an XML-RPC based service. The service deals with beer prices and has a handful of methods for you to provide.
All explained in uploaded file.
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I have very good experience in development of applications, websites and web portals.
Worked on integration of various API, Payment Gateways into websites and implemented open source products.
I am very anxious to develop a relationship with you and I would be grateful for any opportunity to enable me to earn your confidence in our services.
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Using PHP for creating XML-RPC Web Service, simply call following function: xmlrpc_server_create(), and your web service is ready to use. And for registering method, simply use: xmlrpc_server_register_method()
Thats all. Let me know your project detail