(PHP 7 >= 7.3.0)
hrtime — Get the system's high resolution time
Returns the system's high resolution time, counted from an arbitrary point in time. The delivered timestamp is monotonic and can not be adjusted.
Returns an array of integers in the form [seconds, nanoseconds], if the
parameter get_as_number
is false. Otherwise the nanoseconds
are returned as integer (64bit platforms) or float
(32bit platforms).
Example #1 hrtime() usage
<?php
echo hrtime(true), PHP_EOL;
print_r(hrtime());
?>
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10444739687370679 Array ( [0] => 10444739 [1] => 687464812 )