title: How to send GCM messages to multiple devices at a time
body: <p>I want to send same message to multiple devices in android using GCM. Currently i am able to send push notification to my device as i am explicitly specifying my registration ID in PHP code. But i want to send it to multiple devices  so how can i do this???
  Any help or idea are highly appreciated.</p>
  
  <p>Please guide for this
  Thanks</p>