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使用 PHP 创建 ping 正常运行时间服务

发布于 2024-12-04 01:33:24 字数 294 浏览 0 评论 0原文

我有一台可以使用 PHP 的服务器和一个可以从 Internet ping 通的路由器。我想编写一个 PHP 脚本，每 5 分钟向路由器发送一次 ping，结果如下：

如果 ping 成功，则不会发生任何事情。
如果 ping 失败，则会等待几分钟，如果仍然失败，则会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示一切正常。

这可以用 PHP 来完成吗？如何？有人有一个小 PHP 文件可以做到这一点吗？

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糖粟与秋泊 2024-12-11 01:33:24

下面我编写了一个简单的 PHP 脚本，可以满足您的要求。它对服务器执行 ping 操作，将结果记录到文本文件（“向上”或“向下”），并根据之前的结果是向上还是向下发送电子邮件。

要让它每五分钟运行一次，您需要配置一个 cron 作业以每五分钟调用一次 PHP 脚本。（许多共享网络主机允许您设置 cron 作业；请参阅托管提供商的文档以了解如何操作。）

<?php 

//Config information
$email = "[email protected]";
$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"; 
}

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.

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 = "[email protected]";
$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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