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);
启动
php deamon.php start
关闭
php deamon.php stop
希望本文所述对大家PHP程序设计有所帮助。
