PHP Manual
杂项函数
Get the system's high resolution time

hrtime

(PHP 7 >= 7.3.0)

hrtime — Get the system's high resolution time

说明

hrtime ([ bool $get_as_number = FALSE ] ) : mixed

Returns the system's high resolution time, counted from an arbitrary point in time. The delivered timestamp is monotonic and can not be adjusted.

参数

get_as_number: Whether the high resolution time should be returned as array or number.

返回值

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).

范例

Example #1 hrtime() usage

 <?php
echo hrtime(true), PHP_EOL;
print_r(hrtime());
?>

以上例程的输出类似于：

10444739687370679
Array
(
    [0] => 10444739
    [1] => 687464812
)

参见

The High resolution timing extension

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