title: how to generate unique id in php based on current data and time?
body: <p>I need to generate a unique ID in php based on current date and time to keep a log of when i am running code.
  i.e. every time i run the code it should be able to generate a unique id based on current date and time.</p>
  
  <p>Hope I am clear with my ques. How to do that?</p>