posix_times

Description

array posix_times ( void )

Returns a hash of strings with information about the current process CPU usage. The indices of the hash are

ticks - the number of clock ticks that have elapsed since reboot.
utime - user time used by the current process.
stime - system time used by the current process.
cutime - user time used by current process and children.
cstime - system time used by current process and children.

警告

This function isn't reliable to use, it may return negative values for high times.

add a note User Contributed Notes

brain at winbot dot co dot uk
27-Jun-2004 09:14


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.

not_rich_yet at hotmail dot com
20-Jul-2003 07:21


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
18-Jun-2003 02:01


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
21-Nov-2002 05:42


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");

  }

}

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