/bin/sh -c CMD will fork sh and then exec CMD.
/bin/sh -c exec CMD will NOT fork and only executes CMD.
Therefore, you can get rid of this hack by prefixing your command to "exec bla bla bla".
(PHP 5, PHP 7, PHP 8)
proc_terminate — 杀死由 proc_open 打开的进程
向 process（由 proc_open()
创建）发送信号通知其终止。proc_terminate()
调用之后将会立即返回，而不会等待进程终止。
proc_terminate() 允许终止进程并继续其他的任务。可以使用 proc_get_status() 函数轮询进程（查看是否已经停止）。
process将要关闭的由 proc_open() 打开的 resource。
signal
可选参数，仅用于 POSIX 操作系统。可以使用
kill(2) 系统调用指定要发送到进程的信号。默认值为
SIGTERM。
返回已运行进程的终止状态。
/bin/sh -c CMD will fork sh and then exec CMD.
/bin/sh -c exec CMD will NOT fork and only executes CMD.
Therefore, you can get rid of this hack by prefixing your command to "exec bla bla bla".As explained in http://bugs.php.net/bug.php?id=39992, proc_terminate() leaves children of the child process running. In my application, these children often have infinite loops, so I need a sure way to kill processes created with proc_open(). When I call proc_terminate(), the /bin/sh process is killed, but the child with the infinite loop is left running.
Until proc_terminate() gets fixed, I would not recommend using it. Instead, my solution is to:
1) call proc_get_status() to get the parent pid (ppid) of the process I want to kill.
2) use ps to get all pids that have that ppid as their parent pid
3) use posix_kill() to send the SIGKILL (9) signal to each of those child pids
4) call proc_close() on process resource
<?php
$descriptorspec = array(
0 => array('pipe', 'r'), // stdin is a pipe that the child will read from
1 => array('pipe', 'w'), // stdout is a pipe that the child will write to
2 => array('pipe', 'w') // stderr is a pipe the child will write to
);
$process = proc_open('bad_program', $descriptorspec, $pipes);
if(!is_resource($process)) {
throw new Exception('bad_program could not be started.');
}
//pass some input to the program
fwrite($pipes[0], $lots_of_data);
//close stdin. By closing stdin, the program should exit
//after it finishes processing the input
fclose($pipes[0]);
//do some other stuff ... the process will probably still be running
//if we check on it right away
$status = proc_get_status($process);
if($status['running'] == true) { //process ran too long, kill it
//close all pipes that are still open
fclose($pipes[1]); //stdout
fclose($pipes[2]); //stderr
//get the parent pid of the process we want to kill
$ppid = $status['pid'];
//use ps to get all the children of this process, and kill them
$pids = preg_split('/\s+/', `ps -o pid --no-heading --ppid $ppid`);
foreach($pids as $pid) {
if(is_numeric($pid)) {
echo "Killing $pid\n";
posix_kill($pid, 9); //9 is the SIGKILL signal
}
}
proc_close($process);
}
?>on Windows platform proc_terminate() does not kill sub-processes that are not handling kill signals. It happens even if you call xxx.exe and call proc_terminate() the process will remain active.
The solution is instead of calling proc_terminate() is to call the user-defined kill() function (already win/unix optimized)
After that need to close all pipes and execute proc_close().
function kill($pid){
return stripos(php_uname('s'), 'win')>-1 ? exec("taskkill /F /T /PID $pid") : exec("kill -9 $pid");
}
function killall($pids) {
$os=stripos(php_uname('s'), 'win')>-1;
($_=implode($os?' /PID ':' ',$pids)) or ($_=$pids);
return preg_match('/success|close/', $os ? exec("taskkill /F /T /PID $_") : exec("kill -9 $_"));
}
Example:
$pstatus = proc_get_status($resource);
$PID = $pstatus['pid'];
// other commands
kill($PID); // instead of proc_terminate($resource);
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($resource);Just a small note so people don't have to look elsewhere
To get the list of processes or find a process by name, use
$proclist = shell_exec('ps -elF') for linux
$proclist = shell_exec('tasklist') for windows
After that, you can use php normal parsing functions to get the pid