Re: PHP errors in debian

So, Sebastian gave me a user account to investigate this. I am posting 
here, since more people might want to see this.
It is most probably a problem with your sudo configuration. It seems 
that the user www-data can't run "sudo /sbin/iwconfig"

to see if this is the case, create a file called test.php in your 
wifiadmin directory, with the following content:

<?php
    include( "include/functions.php");

    //this just runs iwconfig, and prints it's output, and the return code
    print( system("sudo /sbin/iwconfig", $return_value));
    echo("\n $return_value \n");

    //the get_wireless_status function, parses the output of iwconfig, 
and returns it in an array
    print_r(get_wireless_status());
?>

then become www-data, by running:

su - www-data

and now try to execute the above script, running

php test.php

if you don't get the correct output (which is the ouput of iwconfig, 
followed by a 0, followed by the pretty-print of the corresponding