php - 如何捕获KILL或HUP或User Abort信号？

我有一个在Linux服务器后台运行的脚本，我想捕获诸如重新启动之类的信号或任何会杀死该脚本的信号，而是在实际退出之前保存所有重要信息。

我认为我最需要了解的是SIGINT，SIGTERM，SIGHUP，SIGKILL。

如何捕获任何这些信号并使其执行退出功能，否则继续执行其所做的工作？

伪Perl代码:

#!/usr/bin/perl

use stricts;
use warnings;

while (true)
{
    #my happy code is running
    #my happy code will sleep for a few until its breath is back to keep running.
}

#ops I have detected an evil force trying to kill me
#let's call the safe exit.
sub safe_exit()
{
    # save stuff
    exit(1);
}

伪php代码:

<?php

while (1)
{
    #my happy code is running
    #my happy code will sleep for a few until its breath is back to keep running.
}

#ops I have detected an evil force trying to kill me
#let's call the safe exit.

function safe_exit()
{
    # save stuff
    exit(1);
}
?>

最佳答案

PHP使用 pcntl_signal 注册信号处理程序，因此如下所示:

declare(ticks = 1);

function sig_handler($sig) {
    switch($sig) {
        case SIGINT:
        # one branch for signal...
    }
}

pcntl_signal(SIGINT,  "sig_handler");
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP,  "sig_handler");
# Nothing for SIGKILL as it won't work and trying to will give you a warning.

关于php - 如何捕获KILL或HUP或User Abort信号？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7864349/