The document you sign can be local or even a remote object, as long as those objects can be referenced through a URI (Uniform Resource Identifier). You can sign not only XML data, but also non-XML data. A signature can be either enveloped or enveloping, which means the signature can be either embedded in a document being signed or reside outside the document.
Build your own Web Service with PHP and XML-RPC
The request contains a method and perhaps some parameters required by the method. The response replies with parameters that contain the requested data. The process is very much like using a function youve defined in a PHP script; you call a function and pass it some variables. The function then responds by returning some variables. Heres what a client request might look like, as seen by the target XML-RPC server: Request (from your XML-RPC client): POST /xmlrpcInterface HTTP/1.0 User-Agent: Sitepoint XML-RPC Client 1.0 Host: xmlrpc.sitepoint.com <value><int>42</int></value> </methodResponse> The example request might be to find out how many threads have been posted in the PHP Development forum today. The response tells the client the number it asked for.
Why everybody's building a Web music service
Online streaming, by which users listen to music either for free or for a monthly fee, is the fastest growing form of music listening, according to industry reports. The Recording Industry Association of America, in its annual report , said that while overall music sales were down in 2012, digital-music sales were up 14%, topping $4 billion. "Digital growth was driven by large increases in revenues through what can broadly be referred to as 'access models,' where users can choose to pembuatan website listen from large libraries of music rather than purchasing individual songs or albums," the report read. At the top of that heap are sites like Pandora and Spotify.