phpShout is a PHP5 Extension that wraps around the libshout library available at icecast.org. LibShout is used in conjunction with an Icecast server to create a streaming Internet radio station from your own music files. With phpShout, PHP developers can create web-based streaming jukebox applications, without worrying about the details of streaming the audio data. LibShout handles all the metadata updates, data timing, and ensuring that no bad data gets to the Icecast server.

Once such Web Jukebox application being developed is phpRadio, using phpShout as its backend audio streaming technology!