PCNTL is short for Process Control, a PHP Extension implementing the Unix style of process creation, program execution, signal handling and process termination.
Documentation of the PHP PCNTL extension can be found here: https://php.net/pcntl
Questions tagged [pcntl]
171 questions
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vote
2 answers
Why is the use of pcntl library in php is discouraged on prod-serv?
Can anybody tell me why using the pcntl lib on production servers is discouraged? The PHP manual tells very briefly about it, and I'm in a dire need to use this library...
Is there another way to do the same thing in php?
marek
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1
vote
1 answer
Symfony3 Command - pcntl doesn't works
I want to stop executing my command from controller action so I tried to use pcntl to achieve this.
This is my code(Command):
protected $should_stop = false;
protected function execute(InputInterface $input, OutputInterface $output)
{
…
SakuragiRokurota
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1
vote
1 answer
Unexpected cores synchronization in pcntl_fork()
I'm researching multi-core optimization abilities in PHP. My test program forks 4 processes so that each one should run twice as long as previous.
Code is:
$iters = 20000000;
for ($c = 0; $c < 4; $c++) {
$pid = pcntl_fork();
if ($pid…
Agnius Vasiliauskas
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vote
0 answers
Call to undefined function pcntl_wifsignaled()
I'm attempting to use the import functionality in mediawiki 1.27.0, but I'm getting the error message:
Call to undefined function pcntl_wifsignaled() in extensions/Scribunto/engines/LuaStandalone/LuaStandaloneEngine.php on line 645
I'm running PHP…
Ben
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1 answer
php pcntl_alarm - pcntl_signal handler doesn't fire?
I'm considering using pcntl_alarm() for something, so to test it out I ran a variation of the example you find everywhere when you google pcntl_alarm:
function signal_handler()
{
echo "Caught SIGALRM\n";
exit;
}
pcntl_signal('SIGALRM',…
Mark H.
- 549
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1
vote
1 answer
kill is absorbed by "system" call and never triggers pcntl_signal
I have a daemon script and I'm trying to keep it simple by avoiding threads.
When i ctrl-c or kill pid, the "system" call is exited, but exitFunction isn't called.
declare(ticks = 100);
function exitFunction($signo) {
global $pidFile, $exit;
…
Sophie McCarrell
- 2,831
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1
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0 answers
Child process in php executes destructor of class objects created in parent process
In the below code. I am trying to understand the behavior.
class ForkManager
{
private $_max_workers = 3;
private $_open_processes = 0;
private $_tasks = array();
public function setMaxWorkers($num)
{
…
jimy
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1
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2 answers
PHP7 Bugs pcntl_signal(SIGCHLD, SIG_IGN); how to kill zombies?
If i run it:
Карнаухов Олег
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Commands return exit code 2 while process is terminating
I have a long-running PHP process which is handling signals. The signals are handled at the end of each "iteration" using pcntl_signal_dispatch(), along with some other tasks. Some of these tasks run command line operations, such as find.
As soon as…
Marco Roy
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0 answers
How to view process output with PID ? (proc_open)
edited:
goal:
I have an application written in Python that can download videos from web pages! (auto detect video link in youtube or other video site)
When I run it in CMD , Runs well and shows the download speed and remined time.
Now I want to make…
PersianMan
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1
vote
3 answers
Looping or Recursive PHP Function on time delay - Need Event Loop? Forking?
I have a PHP function that needs to be executed ~10 seconds after certain events.
The Function can in turn create a new instance of the event, which would need to trigger the function again ~10 seconds later.
Often the function won't create a new…
Charles
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1
vote
1 answer
Parallel processing in PHP using zeroMQ
Some background:
I am building a server application in php that will need to execute a number of independent tasks on a user request. Theres is a severe requirement on speed for my application so I would like to execute all of those tasks in…
roinir
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0 answers
How to pass data from child process to master process by php pcntl?
I start some pcntl process to calculate some data, and I want to wait all child process end ,and send all return data to master process.
How Can I do that?
my pnctl trait like that:
jianfeng
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1
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1 answer
Wrong exit code received from wexitstatus
I'm using PCNTL to multiprocess a big script in PHP on an ubuntu server.
Here is the code ( simplified and commented )
function signalHandler($signo = null) {
$pid = posix_getpid();
switch ($signo) {
case SIGTERM:
case…
Random
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1
vote
2 answers
php signal not handled right away
I have a software written in PHP which can run for a long time, it's lauched via command line (not a web application). I wanted to make sure to call a function when the software exit, including when killed via ctrl+c. When killed by a signal, the…
Pier-Yves Lessard
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