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posix_times

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

posix_times — Возвращает информацию об использовании процессорного времени

Описание

posix_times(): array|false

Возвращает информацию об уровне загрузки CPU.

Список параметров

У этой функции нет параметров.

Возвращаемые значения

Возвращает массив строк с информацией об текущем использовании CPU, который включает следующее

ticks - число тактов, прошедшее с момента перезагрузки.
utime - время пользователя, затраченное текущим процессом.
stime - системное время, затраченное текущим процессом.
cutime - время пользователя, затраченное текущим процессом и его дочерними процессами.
cstime - системное время, затраченное текущим процессом и его дочерними процессами..

Функция возвращает false в случае возникновения ошибки.

Примеры

Пример #1 Пример использования posix_times()

<?php

$times = posix_times();

print_r($times);
?>

Вывод приведённого примера будет похож на:

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

Примечания

Внимание

Данная функция не является надёжной в использовании и может вернуть неправильные значения.

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User Contributed Notes 4 notes

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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

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

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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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