PHP Script to run arp command on linux machine to detect mac address of computers in LAN

2 ways of doing it use the exec() command within php to directly execute the request.

Or what I'd do is separate the web side from the command side totally.

Have php write a command "request" into a database table.

Have a cron script that executes a php/perl/python whatever bash script/application that will request which command to run from the db (check see if request is pending if so run specified command) and then write its result set out back into the DB.

Then have your php website display the output. So it'd go something like this:

Request (webserver) > pending db > cron check if job exists > if job exists execute requested command > return data db > webserver displays data.

How you notify the end client that a result has been returned is upto you I suggest either an iframe or an ajax check query to see if results exist in the db that haven't been "viewed" yet. Have your cron job set to run every 60 seconds for example so it'll take no longer than 60 seconds from the user requesting it to the actual result being returned.

What you need is to know how to manupilate strings!

<?php

exec("mylinuxcmd", $exitVals);

?>

for run a command, just use:

where $exitVals is na Array with the terminal output or the "mylinuxcmd", each line of output is stored in an array position!

This is an example of catching server IP`s and print them on screen:

<?php

// exec ifconfig linux command and catch exit on $arr
exec("ifconfig", $arr);



foreach($arr as $ar) {
if(strstr($ar,'inet ')){
        if(!strstr($ar,'127.0.0.1')){

        $a = explode (' ',$ar);
        echo $a[1]."\r\n";
        }
}

}
?>

Depending on your sistem ifconfig, the ip can be in different place, so $a[1] can be $a[2], etc