PHP 做守护进程
http://www.21andy.com/blog/20100228/1728.html Unix中 nohup 命令功能就是不挂断地运行命令,同时 nohup 把程序的所有输出到放到当前目录 nohup.out 文件中,如果文件不可写,则放到 用户主目录/nohup.out 文件中。那么有了这个命令以后我们php就写成shell
http://www.21andy.com/blog/20100228/1728.html
Unix中 nohup 命令功能就是不挂断地运行命令,同时 nohup 把程序的所有输出到放到当前目录 nohup.out 文件中,如果文件不可写,则放到 /nohup.out 文件中。那么有了这个命令以后我们php就写成shell 脚本使用循环来让我们脚本一直运行下去,不管我们终端窗口是否关闭都能够让我们php 脚本一直运行下去。
不多废话,马上动手写个 PHP 小程序,功能为每30秒记录时间,写入到文件
# vi for_ever.php
#! /usr/local/php/bin/php
define('ROOT', dirname(__FILE__).'/');
set_time_limit(0);
while (true) {
file_put_contents(ROOT.'for_ever.txt', date('Y-m-d
H:i:s')."\n", FILE_APPEND);
echo date('Y-m-d
H:i:s'), ' OK!';
sleep(30);
}
?>
保存退出,然后赋予 for_ever.php 文件可执行权限:
# chmod +x for_ever.php
让它在再后台执行:
# nohup /home/andy/for_ever.php.php &
记得最后加上 & 符号,这样才能够跑到后台去运行
执行上述命令后出现如下提示:
[1] 5157
nohup: appending output to 'nohup.out'
所有命令执行输出信息都会放到 nohup.out 文件中
这时你可以打开 for_ever.php 同目录下的 for_ever.txt 和 nohup.out 看看效果!
好了,它会永远运行下去了,怎么结束它呢?
# ps
PID TTY TIME CMD
4247 pts/1 00:00:00 bash
5157 pts/1 00:00:00 for_ever.php
5265 pts/1 00:00:00 ps
# kill -9 5157
找到进程号 5157 杀之,你将看到

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