posix_times

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

posix_times — Obtener los tiempos de procesos

Descripción

posix_times(): array|false

Obtiene informaciónsobre el uso actual de CPU.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

Devuelve un hash de cadenas con iformación sobre el uso de CPU del proceso actual. Los índices del hash son:

ticks - el número de pulsos de reloj que han trasncurrido desde el reinicio.
utime - tiempo de usuario usado por el proceso actual.
stime - tiempo de sistema usado por el proceso actual.
cutime - tiempop de usuario usado por el proceso actual y sus hijos.
cstime - tiempo de sistema usado por el proceso actual y sus hijos.

La función devuelve false en caso de fallo.

Ejemplos

Ejemplo #1 Ejemplo de uso de posix_times()

<?php

$tiempos = posix_times();

print_r($tiempos );
?>

El resultado del ejemplo sería algo similar a:

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

Notas

Advertencia

Esta función no es fiable de usar, puede devolver valores negativos para tiempos altos.

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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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