title: Async transactions with PHP and mySQL
body: <p>When a certain action happens on the site (built in PHP and MySQL) I would like few asynchronous things to happen on the site.</p>
  
  <p>For example, when a user answers a question, uploads document, I want few asynchronous things to happen in the background such as:
  1.update user's score
  2. Post a message on Facebook wall
  3.track users actions.</p>
  
  <p>What PHP, JavaScript and MySQL technologies are best for achieving this? Please help.</p>
  
  <p>I want something that MySQL triggers but wanted to happen asynchronously.</p>