使用PHP创建ping正常运行时间服务 [英] Creating a ping uptime service with PHP

问题描述

我有一个可以在其上使用PHP的服务器，以及一个可以从Internet ping通的路由器.我想编写一个PHP脚本，该脚本每5分钟将ping发送一次到路由器，结果如下:

I have a server that I can use PHP on and a router that can be pinged from the Internet. I want to write a PHP script that sends a ping to the router every 5 minutes with the following results:

• 如果ping成功，则不会发生任何事情.
• 如果ping操作失败，则等待几分钟，如果仍然失败，它将向我的电子邮件地址发送一次警告.
• 路由器再次可ping通后，它会发送一封电子邮件，表明一切正常.

这可以用PHP完成吗?如何?有人有一个小的 PHP文件吗?

Could this be done with PHP? How? Does anybody has a small PHP file that does this?

推荐答案

下面，我写了一个简单的PHP脚本，它可以满足您的要求.它将对服务器执行ping操作，将结果记录到文本文件(打开"或关闭")，然后根据先前的结果是打开还是关闭发送电子邮件.

Below I've written a simple PHP script that does what you ask. It pings a server, logs the result to a text file ("up" or "down"), and sends an email depending whether the previous result was up or down.

要使其每五分钟运行一次，您需要配置一个cron作业以每五分钟调用一次PHP脚本. (许多共享的网络主机允许您设置cron作业；请查阅主机提供商的文档以了解操作方法.)

To get it to run every five minutes, you'd need to configure a cron job to call the PHP script every five minutes. (Many shared web hosts allow you to set up cron jobs; consult your hosting provider's documentation to find out how.)

<?php 

//Config information
$email = "[e-mail]";
$server = "google.com"; //the address to test, without the "http://"
$port = "80";


//Create a text file to store the result of the ping for comparison
$db = "pingdata.txt";

if (file_exists($db)):
    $previous_status = file_get_contents($db, true);
else:
    file_put_contents($db, "up");
    $previous_status = "up";
endif;

//Ping the server and check if it's up
$current_status =  ping($server, $port, 10);

//If it's down, log it and/or email the owner
if ($current_status == "down"):

    echo "Server is down! ";
    file_put_contents($db, "down");

    if ($previous_status == "down"):
        mail($email, "Server is down", "Your server is down.");
        echo "Email sent.";     
    endif;  

else:

    echo "Server is up! ";
    file_put_contents($db, "up");

    if ($previous_status == "down"):
        mail($email, "Server is up", "Your server is back up.");
        echo "Email sent.";
    endif;

endif;


function ping($host, $port, $timeout)
{ 
  $tB = microtime(true); 
  $fP = fSockOpen($host, $port, $errno, $errstr, $timeout); 
  if (!$fP) { return "down"; } 
  $tA = microtime(true); 
  return round((($tA - $tB) * 1000), 0)." ms"; 
}

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