I\'ve used AudioStreamer courtesy Matt
I need to extract id3 metadata and display the current song playing.
Since you mention "current song playing", I assume you are trying to play a stream, probably from SHOUTcast or Icecast. These streams don't have ID3 data encoded... they use a separate mechanism.
This is fully detailed here: http://www.smackfu.com/stuff/programming/shoutcast.html
And here: Pulling Track Info From an Audio Stream Using PHP