Measuring time

[ushtabalakh]

Hi, I have made the following functions

To measure how much time it takes for apache to execute my codes, but it doesn't work properly, can someone tell me why?

<?php
$starttime =  microtime(true);

usleep(100);
$starttime = ShowTime($startTime, "step 1");

usleep(400);
$starttime = ShowTime($startTime, "step 2");
usleep(500);
$starttime = ShowTime($startTime, "step 3");
usleep(600);
$starttime = ShowTime($startTime, "step 4");
usleep(700);
$starttime = ShowTime($startTime, "step 5");




function ShowTime($startTime, $Message)
{
	$time_end = microtime(true);
	$time = $time_end - $time_start;
	echo $Message . " took " . $time . " seconds.<br/>";
	return microtime(true);
}

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

?>

This is the output:
step 1 took 1207904003.4 seconds.
step 2 took 1207904003.41 seconds.
step 3 took 1207904003.52 seconds.
step 4 took 1207904003.53 seconds.
step 5 took 1207904003.55 seconds.

Thanks

 

[jpadie]

you're referencing $time_start rather than $startTime in your showtime function.

i assume you are using php 5.0.0 or higher. otherwise you need to change your calls from microtime to microtime_float

i also assume that you know that usleep's argument are expressed in microseconds.

 

[ushtabalakh]

I completed the code, and I'm gonna share it here with you

function ShowTime($startTime, $Message)
{
    $time_end = microtime(true);
    $time = $time_end - $startTime;
    echo $Message . " took " . round($time,2) . " seconds.<br/>";
    ob_flush();
    flush();
    return microtime(true);
}

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

This is how you should use it, you should first declare a variable at the begining of your code

$time1 = microtime_float();

Then use it this way everytime you wanna measure elapsed time:

Action1 codes:
..
..

$time1 = ShowTime($time1,"Action1");

Action2 codes:
..
..
$time1 = ShowTime($time1,"Action2");

It will print
Action 1 took xx.xx seconds
Action 2 took xx.xx seconds

Hope someone finds it useful one day