posix_strerror
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.
posix_times
(PHP 4, PHP 5)
posix_times — Utilisation des ressources
Description
array posix_times
( void
)
Retourne des informations sur l'utilisation courante du CPU.
Valeurs de retour
Retourne un tableau avec les informations sur l'utilisation du CPU. Les indices sont :
- ticks - nombre de ticks depuis le dernier démarrage.
- utime - temps utilisateur utilisé par le processus courant.
- stime - temps système utilisé par le processus courant.
- cutime - temps utilisateur utilisé par le processus courant et ses enfants.
- cstime - temps système utilisé par le processus courant et ses enfants.
Notes
Avertissement
Cette fonction n'est pas fiable, elle peut retourner des valeurs négatives pour des temps élevés.
Exemples
Exemple #1 Exemple avec posix_times()
<?php
$times = posix_times();
print_r($times);
?>
L'exemple ci-dessus va afficher quelque chose de similaire à :
Array
(
[ticks] => 25814410
[utime] => 1
[stime] => 1
[cutime] => 0
[cstime] => 0
)
add a note
User Contributed Notes
posix_times
brain at winbot dot co dot uk
26-Jun-2004 06:14
not_rich_yet at hotmail dot com
19-Jul-2003 04:21
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
murphy at nmc-online dot co dot uk
17-Jun-2003 11:01
I am not sure why, and it could just be me but on my FreeBSD system using
$time = posix_times();
$time['ticks'] is an enormous value that bears no relation to the system uptime (I tested by rebooting the system, the number does not change).
I checked my timecounters, they tick every 10.000msec and I did the maths on the returned value and it suggested the machine had been up for over 200 days - it was reformatted about a week ago.
This could be to do with FreeBSD, or *BSD, or just *idiots like me but just check before you use the function.
~
FreeBSD 5.1-R, Apache 2.0.46, PHP4.3.2
rossz+php at vamos-wentworth dot org
20-Nov-2002 01:42
This function will return the system uptime as a human readable string such as "172 days, 18 hours, 15 minutes". I didn't bother to handle singular so the grammar could be a bit off, e.g. 1 hours.
function uptime() {
if (!$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");
}
}