PHP:如何启动独立进程? [英] PHP: how to start a detached process?

问题描述

当前我的解决方法是:

exec('php file.php >/dev/null 2>&1 &');

和在file.php中

and in file.php

if (posix_getpid() != posix_getsid(getmypid()))
    posix_setsid();

有什么我可以通过exec来做到这一点的方法吗?

is there any way I can do this just with exec?

推荐答案

没有，exec()(也不能是shell_exec()或system())不能做到这一点

No this can't be done with exec() (nor shell_exec() or system())

如果您安装了 pcntl扩展名，则它将是: /p>

If you have the pcntl extension installed it would be:

function detached_exec($cmd) {
    $pid = pcntl_fork();
    switch($pid) {
         // fork errror
         case -1 : return false

         // this code runs in child process
         case 0 :
             // obtain a new process group
             posix_setsid();
             // exec the command
             exec($cmd);
             break;

         // return the child pid in father
         default: 
             return $pid;
    }
}

这样称呼:

$pid = detached_exec($cmd);
if($pid === FALSE) {
    echo 'exec failed';
}

// do some work

// kill child
posix_kill($pid, SIGINT);
waitpid($pid, $status);

echo 'Child exited with ' . $status;

这篇关于PHP:如何启动独立进程?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！