php实现简单的守护进程创建、开启与关闭操作

砸漏

发布于 2020-10-20 10:33:27

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发布于 2020-10-20 10:33:27

本文实例讲述了php实现简单的守护进程创建、开启与关闭操作。分享给大家供大家参考，具体如下：

前提要安装有pcntl扩展，可通过php -m查看是否安装

<?php
class Daemon {
  private $pidfile;
  function __construct() {
    $this- pidfile = dirname(__FILE__).'/daemontest.pid';
  }
  private function startDeamon() {
    if (file_exists($this- pidfile)) {
      echo "The file $this- pidfile exists.\n";
      exit();
    }
    $pid = pcntl_fork();
    if ($pid == -1) {
      die('could not fork');
    } else if ($pid) {
      echo 'start ok';
      exit($pid);
    } else {
    // we are the child
      file_put_contents($this- pidfile, getmypid());
      return getmypid();
    }
  }
  private function start(){
    $pid = $this- startDeamon();
    while (true) {
      file_put_contents(dirname(__FILE__).'/test.txt', date('Y-m-d H:i:s'), FILE_APPEND);
      sleep(2);
    }
  }
  private function stop(){
    if (file_exists($this- pidfile)) {
      $pid = file_get_contents($this- pidfile);
      posix_kill($pid, 9);
      unlink($this- pidfile);
    }
  }
  public function run($argv) {
    if($argv[1] == 'start') {
      $this- start();
    }else if($argv[1] == 'stop') {
      $this- stop();
    }else{
      echo 'param error';
    }
  }
}
$deamon = new Daemon();
$deamon- run($argv);

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