Basically all you do is grab the time at the start of your script execution and then grab it right at the end again. Subtract the start from the finished and you’ll be left with the amount of time taken to execute.
We will use the handy PHP microtime function which returns the current Unix timestamp with microseconds to handle the time capture for us.
Note that this function is only available on operating systems that support the gettimeofday() system call.
So now that I’ve explained to you how to do it, let us put it into action:
At the top of your script, enter:
$time_start = microtime(true);
Then at the bottom of your page, insert:
$time_end = microtime(true); $time = $time_end - $time_start; echo round($time,2) . " s";
That’s it. You’re done! :)