proc_terminate

(PHP 5, PHP 7)

proc_terminate — 杀除由 proc_open 打开的进程

说明

bool proc_terminate ( resource $process [, int $signal = 15 ] )

向 process （由 proc_open() 函数创建）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。

可以使用 proc_terminate() 终止进程并且继续其他的任务。可以使用 proc_get_status() 函数来检查进程是否已经终止。

参数

process: 由 proc_open() 打开的 resource 。
signal: 可选参数，仅用于 POSIX 操作系统。表示调用系统命令 kill(2) 来向进程发送的信号。默认值为 SIGTERM。

返回值

返回进程的终止状态。

更新日志

版本	说明
5.2.2	之前的版本被用来销毁进程 `resource`。

参见

proc_open() - 执行一个命令，并且打开用来输入/输出的文件指针。
proc_close() - 关闭由 proc_open 打开的进程并且返回进程退出码
proc_get_status() - 获取由 proc_open 函数打开的进程的信息

用户评论:

[#1] v dot denegin at yahoo dot com [2013-12-17 15:47:39]

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);

[#2] csh dot spam at me dot com [2013-10-20 21:55:46]

/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".

[#3] jerhee at ucsd dot edu [2008-02-23 20:08:10]

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); } ?>