title: Sending messages from PHP to Node.js
body: <p>How to send messages from php to node.js?   I have a linux server running php and node.js. </p>
  
  <p>When a user completes a transaction (via php), I'd like send a message from php to node.js. Node will then update the client via a socket connection.</p>
  
  <p>What's a good way to send a small amount of data from php to node.js without defeating the performance of node.js?</p>