Time it took to load in PHP?

Question

I've created a basic application in PHP and would like to print the time it takes to load the page at the end of the page. I first define the start with a microtime and then compare it to the current microtime at the end, the problem is it outputs something like "0.000102" and I'm looking for it in milliseconds, I'm guessing that would be 102ms?

Define the start,

define("START", microtime(true));

Then print the end time.

printf("Page was rendered in %f milliseconds", (microtime(true) - START));

But it still outputs that horrible long string.

Answer 1

Milliseconds is n*1000:

<?php
$start = microtime(true);

usleep(1000000);

$end = microtime(true) - $start;

printf("Page was rendered in %f seconds", $end);
printf("Page was rendered in %f milliseconds", $end*1000);
printf("Page was rendered in %f microseconds", ($end*1000)*1000);

https://3v4l.org/kHmA3

Result:

Page was rendered in 1.000115 seconds
Page was rendered in 1000.115156 milliseconds
Page was rendered in 1000115.156174 microseconds

---

Edit: If you want values outputted like 0.10 etc you will need to change %f to %s and use round().

<?php
$start = microtime(true);

usleep(1000000);

$end = microtime(true) - $start;

printf("Page was rendered in %s seconds", round($end, 2));
printf("Page was rendered in %s milliseconds", round($end*1000, 2));
printf("Page was rendered in %s microseconds", round(($end*1000)*1000, 2));

https://3v4l.org/OfgJX

Result:

Page was rendered in 1 seconds
Page was rendered in 1000.12 milliseconds
Page was rendered in 1000121.12 microseconds