posix_times
(PHP 4, PHP 5)
posix_times — Get process times
Описание
array posix_times
( void
)
Gets information about the current CPU usage.
Возвращаемые значения
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.
Примечания
Внимание
This function isn't reliable to use, it may return negative values for high times.
Примеры
Пример #1 Example use of posix_times()
<?php
$times = posix_times();
print_r($times);
?>
Результатом выполнения данного примера будет что-то подобное:
Array ( [ticks] => 25814410 [utime] => 1 [stime] => 1 [cutime] => 0 [cstime] => 0 )
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для управления процессами программ
- POSIX
- posix_access
- posix_ctermid
- posix_errno
- posix_get_last_error
- posix_getcwd
- posix_getegid
- posix_geteuid
- posix_getgid
- posix_getgrgid
- posix_getgrnam
- posix_getgroups
- posix_getlogin
- posix_getpgid
- posix_getpgrp
- posix_getpid
- posix_getppid
- posix_getpwnam
- posix_getpwuid
- posix_getrlimit
- posix_getsid
- posix_getuid
- posix_initgroups
- posix_isatty
- posix_kill
- posix_mkfifo
- posix_mknod
- posix_setegid
- posix_seteuid
- posix_setgid
- posix_setpgid
- posix_setrlimit
- posix_setsid
- posix_setuid
- posix_strerror
- posix_times
- posix_ttyname
- posix_uname
Коментарии
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, $minutes minutes");
}
}
I am not sure why, and it could just be me but on my FreeBSD system using$time = posix_times();
$time['ticks'] is an enormous value that bears no relation to the system uptime (I tested by rebooting the system, the number does not change).
I checked my timecounters, they tick every 10.000msec and I did the maths on the returned value and it suggested the machine had been up for over 200 days - it was reformatted about a week ago.
This could be to do with FreeBSD, or *BSD, or just *idiots like me but just check before you use the function.
~
FreeBSD 5.1-R, Apache 2.0.46, PHP4.3.2
If you want the output to be 'grammatically correct' then try the following code. It will eg print '1 minute' as opposed to '1 minutes', the same goes for days and hours:
Put the following code somewhere in the head of the page code:
<?php
function uptime() {
if (!$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
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.