posix_times

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_times — プロセス時間を得る

説明

posix_times(): array|false

現在の CPU 使用状況についての情報を取得します。

パラメータ

この関数にはパラメータはありません。

戻り値

現在のプロセスの CPU 使用状況に関する情報を表す文字列を連想配列として返します。連想配列のキーは次のようになります。

ticks - リブートからの経過クロック数。
utime - 現在のプロセスにより使用されているユーザー時間。
stime - 現在のプロセスにより使用されているシステム時間。
cutime - 現在のプロセスおよび子プロセスにより使用されているユーザー時間。
cstime - 現在のプロセスおよび子プロセスにより使用されているシステム時間。

この関数は、失敗時に false を返します。

例

例1 posix_times() の使用例

<?php

$times = posix_times();

print_r($times);
?>

上の例の出力は、たとえば以下のようになります。

Array
(
    [ticks] => 25814410
    [utime] => 1
    [stime] => 1
    [cutime] => 0
    [cstime] => 0
)

注意

警告

この関数の返す値は信頼できません。時間が大きくなると負の値を返すこともあります。

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User Contributed Notes 4 notes

down

murphy at nmc-online dot co dot uk ¶

21 years ago

I am not sure why, and it could just be me but on my FreeBSD system using
$time = posix_times();
$time['ticks'] is an enormous value that bears no relation to the system uptime (I tested by rebooting the system,  the number does not change).
I checked my timecounters, they tick every 10.000msec and I did the maths on the returned value and it suggested the machine had been up for over 200 days - it was reformatted about a week ago.
This could be to do with FreeBSD, or *BSD, or just *idiots like me but just check before you use the function.
 ~
FreeBSD 5.1-R, Apache 2.0.46, PHP4.3.2

down

brain at winbot dot co dot uk ¶

20 years ago

doesnt work with freebsd. as stated above the clock ticks at different intervals on different platforms.

for system uptime consider piping the uptime command or similar, depending on if performance is an issue or not.

down

not_rich_yet at hotmail dot com ¶

21 years ago

If you want the output to be 'grammatically correct' then try the following code.  It will eg print '1 minute' as opposed to '1 minutes', the same goes for days and hours:

Put the following code somewhere in the head of the page code:

<?php
function uptime() {
if (!$times = posix_times() ) {
return ("unknown");
} else {
$now = $times['ticks'];
$days = intval($now / (60*60*24*100));
$remainder = $now % (60*60*24*100);
$hours = intval($remainder / (60*60*100));
$remainder = $remainder % (60*60*100);
$minutes = intval($remainder / (60*100));
if ($days == 1) {$writeDays = "day";} else {$writeDays = "days";}
if ($hours == 1) {$writeHours = "hour"; } else {$writeHours = "hours";}
if ($minutes == 1) {$writeMins = "minute";} else {$writeMins = "minutes";}
return ("$days $writeDays, $hours $writeHours, $minutes $writeMins");
}
}
?>

Then put this bit where you want the info displayed:

<?php
print uptime();
?>

Regards,

nry

down

rossz+php at vamos-wentworth dot org ¶

22 years ago

This function will return the system uptime as a human readable string such as "172 days, 18 hours, 15 minutes".  I didn't bother to handle singular so the grammar could be a bit off, e.g. 1 hours.

function uptime() {
  if (!$times = posix_times()) {
    return ("unknown");
  } else {
    $now = $times['ticks'];
    $days = intval($now / (60*60*24*100));
    $remainder = $now % (60*60*24*100);
    $hours = intval($remainder / (60*60*100));
    $remainder = $remainder % (60*60*100);
    $minutes = intval($remainder / (60*100));
    return ("$days days, $hours hours, $minutes minutes");
  }
}

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