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    proc_terminate

    (PHP 5, PHP 7, PHP 8)

    proc_terminate — proc_open でオープンされたプロセスを強制終了する

    説明

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

    終了させる (proc_open() を用いて生成された) process にシグナルを送信します。 proc_terminate() は即座に返され、 プロセスの終了を待ちません。

    proc_terminate() により、プロセスを終了させ、 他のタスクを継続することができます。proc_get_status() 関数を使用して (停止したかどうかを確認するために) プロセスをポーリングすることができます。

    パラメータ

    process

    終了させる proc_open() リソース。

    signal

    このオプションパラメータは POSIX オペレーティングシステムでのみ有用です。 kill(2) システムコールを使用して、 プロセスに送信するシグナルを指定することができます。 デフォルトは SIGTERM です。

    戻り値

    実行していたプロセスの終了状態を返します。

    参考

    • proc_open() - コマンドを実行し、入出力用にファイルポインタを開く
    • proc_close() - proc_open で開かれたプロセスを閉じ、 そのプロセスの終了コードを返す
    • proc_get_status() - proc_open で開かれたプロセスに関する情報を取得する

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    User Contributed Notes 4 notes

    up
    19
    csh dot spam at me dot com
    11 years ago
    /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".
    up
    23
    jerhee at ucsd dot edu
    16 years ago
    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);
    }

    ?>
    up
    5
    v dot denegin at yahoo dot com
    11 years ago
    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);
    up
    2
    smcbride at msn dot com
    3 years ago
    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
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