title: Countdown timer that counts down the execution of php script
body: <p>I am trying to add on a script of mine that is checking some factors for multiple websites a COUNTDOWN that will let the user know, live, how many hours/minutes/seconds will remain until script finishes the task. I need to do this to a php script of mine. But really don't know where to get started. I only know that is possible to COUNT the time of a script HAD BEEN executed with <code>microtime()</code> function. I tried searching lots of scripts here, but I barely found smth related to some dynamic progress bars (but not very well explained) and nothing to a dinamic countdown timer that can countdown execution time of script.
  Would be much appreciated any help related this issue (links, functions, scripts...)</p>