Raspberry Pi无法通过PHP执行脚本

Question

I'm playing with Raspberry Pi and anm Arduino shield in order to run a script via Apache / PHP . This script simple blink a LED . I have already tested the script via shell and it works fine, with the command

/root/arduPi/blink_test

I'm able to see my LED blinking. So I made the same thing via Apache PHP with this short PHP script

<?php
    if(isset($_GET['cmd'])){
        echo '/root/arduPi/'.$_GET['cmd'];
        exec('/root/arduPi/'.$_GET['cmd']);
    }
?>

but nothing happen and no error has been displayed.

I tested the PHP code with

<?php
    phpinfo();
?>

and it's fine. How can I fix this problem?

Answer 1

I had the same issue a while back it was because Apache does not have permission to access certain devices on the Pi. I fixed this by getting rid of the need to be root to access these devices. HERE Is my post about this same issue the fix was to setup sudo as passwordless. THIS is what I used to accomplish setting up sudo as passwordless. You should then be able to execute the script as follows exec('sudo /root/arduPi/'.$_GET['cmd']);