microtime in second with 2 decimals - php

Question

I try calculate time of an act in second with 2 decimals.
protected function microtimeFormat($data)
{
$duration = microtime(true) - $data;
$hours = (int)($duration/60/60);
$minutes = (int)($duration/60)-$hours*60;
return $seconds = $duration-$hours*60*60-$minutes*60;
}
this method get start time as $data...and get back it an int second
for example it return 2second.
I try get second with 2 decimals ...
protected function microtimeFormat($data,$format=null,$lng=null)
{
$duration = microtime(true) - $data;
$hours = (float)($duration/60/60);
$minutes = (float)($duration/60)-$hours*60;
$seconds = $duration-$hours*60*60-$minutes*60;
return number_format((float)$seconds, 2, '.', '');
}
but it return me 0.00 for short time

Answer 1

I think your issue comes from the (float) conversion to $hours and $minutes. When you do so you don't save the decimal part of each so your calculation of $seconds always give 0. Convert to int so you actually save in $hours and $minutes the actual number of seconds they each represent. And the remainder goes to $seconds.
protected function microtimeFormat($data,$format=null,$lng=null)
{
$duration = microtime(true) - $data;
$hours = (int)($duration/60/60);
$minutes = (int)($duration/60)-$hours*60;
$seconds = $duration-$hours*60*60-$minutes*60;
return number_format((float)$seconds, 2, '.', '');
}
$start = microtime(TRUE);
sleep(1);
$delay = $this->microtimeFormat($start);
var_dump($delay);
This gives me:
string(4) "1.01"

Answer 2

I use this form to generate a time in seconds, eg 1.20
$start = microtime(true);
for ($i=0; $i < 10000000; $i++) {
# code...
}
$end = microtime(true);
echo "<br>" . $time = number_format(($end - $start), 2);
// We get this: 1.20
An example comparing the performance of 2 functions of PHP:
define( 'NUM_TESTS', 1000000);
$start = microtime(true);
for( $i = 0; $i < NUM_TESTS; $i++)
{
mt_rand();
}
$end = microtime(true) - $start;
echo 'mt_rand: ' . number_format(($end), 2) . "\n";
$start = microtime(true);
for( $i = 0; $i < NUM_TESTS; $i++)
{
uniqid();
}
$end = microtime(true) - $start;
echo 'uniqid: ' . number_format(($end), 2) . "\n";
// We get this: mt_rand: 0.12 uniqid: 2.06