PHP code execution time

Question

How to find my code execution time?

I am using the below snippet.

I am not happy with that?

list ($msec, $sec) = explode(' ', microtime());
$microtime = (float)$msec + (float)$sec;

Answer 1

I have created this simple class for that:

class timer
{
    private $start_time = NULL;
    private $end_time = NULL;

    private function getmicrotime()
    {
      list($usec, $sec) = explode(" ", microtime());
      return ((float)$usec + (float)$sec);
    }

    function start()
    {
      $this->start_time = $this->getmicrotime();
    }

    function stop()
    {
      $this->end_time = $this->getmicrotime();
    }

    function result()
    {
        if (is_null($this->start_time))
        {
            exit('Timer: start method not called !');
            return false;
        }
        else if (is_null($this->end_time))
        {
            exit('Timer: stop method not called !');
            return false;
        }

        return round(($this->end_time - $this->start_time), 4);
    }

    # an alias of result function
    function time()
    {
        $this->result();
    }

}

To time scripts, you can put it to use like:

$timer = new timer();

$timer->start();
// your code now
$timer->stop();

// show result now
echo $timer->result();

Answer 2

I'm using following class to determine time elapsed:

class StopWatch {
    private static $total;

    public static function start() {
        self::$total = microtime(true);
    }

    public static function elapsed() {
        return microtime(true) - self::$total;
    }
}

You just have to call StopWatch::start at the beginning and StopWatch::elapsed whenever you want to know how much time elapsed from the start.