Get the system's high resolution time

# hrtime

(PHP 7 >= 7.3.0)

hrtime — Get the system's high resolution time

### 説明

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.

### パラメータ

`get_as_number`

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

### 返り値

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).

### 例

例1 hrtime() usage

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

上の例の出力は、 たとえば以下のようになります。

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

### 参考

- The High resolution timing extension