Many organizations use multiple software systems for management. Different software systems often need to exchange data with each other, and a Web service is a method of communication that allows two software systems to exchange this data over the internet.
Different software might be built using different programming languages, and hence there is a need for a method of data exchange that doesn't depend upon a particular programming language. Most types of software can, however, interpret XML tags. Thus, Web services can use XML files for data exchange.
As nowadays necessary to implement in phprunner/asprunner functions to create web utilities (soap, curl, file_get_contents and sockets) and communicate them with various services.
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