xhip/WEBping.md

## WEBping.md

      
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              WEBping.md
            
          
    PHP PING - quick and dirty

NOTE:

This isn't the best way to do it! This is only for my case.
Idea:

I want to receive notifications if my laptop gets disconnect from the internet.
Tools:


a folder on Apache Server (w/ PHP)
a limited user account for that server. (no root, I can only use what is installed on that machine)

Files Client/Laptop:


cron
Every X minutes run "send_ping.sh" that sends a request to the server.
*/X * * * * bash <path>/send_ping.sh


Files Server:


index.php
Gives how many minutes since last ping, just for control.
<?php
    $FILE = file_get_contents('./<File>.txt', true);
    $NOW = strtotime(date("Y-m-d h:i"));
    $PING = strtotime($FILE);
    $X = round(abs($NOW - $PING) / 60,2);
?>
<html>
        <head>
                <title> Ping </title>
        </head>
        <body>
                <h1>Last Ping: <?php echo $X ?> Minutes</h1>
        </body>
</html>


ping_[random string].php
Receives requests and check if everything is ok, update the timestamp on X file.


check.sh
Check X file for how many minutes since the last ping, IF [ TOTAL > ex 5 minutes ] then sends a notification to my cellphone.


cron
Every X minutes run "check.sh"
*/X * * * * bash <path>/check_ping.sh


TODO


get a private VPS ;) so I don't need this
play with mobile connections